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.\" ======================================================================== |
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.\" |
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.IX Title "FFMPEG-CODECS 1" |
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.TH FFMPEG-CODECS 1 "2013-12-14" " " " " |
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.SH "NAME" |
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ffmpeg\-codecs \- FFmpeg codecs |
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.SH "DESCRIPTION" |
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.IX Header "DESCRIPTION" |
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This document describes the codecs (decoders and encoders) provided by |
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the libavcodec library. |
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.SH "CODEC OPTIONS" |
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.IX Header "CODEC OPTIONS" |
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libavcodec provides some generic global options, which can be set on |
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all the encoders and decoders. In addition each codec may support |
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so-called private options, which are specific for a given codec. |
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.PP |
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Sometimes, a global option may only affect a specific kind of codec, |
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and may be unsensical or ignored by another, so you need to be aware |
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of the meaning of the specified options. Also some options are |
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meant only for decoding or encoding. |
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.PP |
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Options may be set by specifying \-\fIoption\fR \fIvalue\fR in the |
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FFmpeg tools, or by setting the value explicitly in the |
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\&\f(CW\*(C`AVCodecContext\*(C'\fR options or using the \fIlibavutil/opt.h\fR \s-1API\s0 |
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for programmatic use. |
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.PP |
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The list of supported options follow: |
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.IP "\fBb\fR \fIinteger\fR \fB(\fR\fIencoding,audio,video\fR\fB)\fR" 4 |
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.IX Item "b integer (encoding,audio,video)" |
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Set bitrate in bits/s. Default value is 200K. |
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.IP "\fBab\fR \fIinteger\fR \fB(\fR\fIencoding,audio\fR\fB)\fR" 4 |
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.IX Item "ab integer (encoding,audio)" |
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Set audio bitrate (in bits/s). Default value is 128K. |
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.IP "\fBbt\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
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.IX Item "bt integer (encoding,video)" |
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Set video bitrate tolerance (in bits/s). In 1\-pass mode, bitrate |
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tolerance specifies how far ratecontrol is willing to deviate from the |
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target average bitrate value. This is not related to min/max |
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bitrate. Lowering tolerance too much has an adverse effect on quality. |
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.IP "\fBflags\fR \fIflags\fR \fB(\fR\fIdecoding/encoding,audio,video,subtitles\fR\fB)\fR" 4 |
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.IX Item "flags flags (decoding/encoding,audio,video,subtitles)" |
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Set generic flags. |
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.Sp |
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Possible values: |
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.RS 4 |
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.IP "\fBmv4\fR" 4 |
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.IX Item "mv4" |
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Use four motion vector by macroblock (mpeg4). |
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.IP "\fBqpel\fR" 4 |
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.IX Item "qpel" |
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Use 1/4 pel motion compensation. |
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.IP "\fBloop\fR" 4 |
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.IX Item "loop" |
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Use loop filter. |
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.IP "\fBqscale\fR" 4 |
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.IX Item "qscale" |
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Use fixed qscale. |
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.IP "\fBgmc\fR" 4 |
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.IX Item "gmc" |
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Use gmc. |
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.IP "\fBmv0\fR" 4 |
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.IX Item "mv0" |
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Always try a mb with mv=<0,0>. |
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.IP "\fBinput_preserved\fR" 4 |
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.IX Item "input_preserved" |
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.PD 0 |
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.IP "\fBpass1\fR" 4 |
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.IX Item "pass1" |
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.PD |
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Use internal 2pass ratecontrol in first pass mode. |
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.IP "\fBpass2\fR" 4 |
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.IX Item "pass2" |
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Use internal 2pass ratecontrol in second pass mode. |
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.IP "\fBgray\fR" 4 |
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.IX Item "gray" |
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Only decode/encode grayscale. |
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.IP "\fBemu_edge\fR" 4 |
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.IX Item "emu_edge" |
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Do not draw edges. |
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.IP "\fBpsnr\fR" 4 |
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.IX Item "psnr" |
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Set error[?] variables during encoding. |
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.IP "\fBtruncated\fR" 4 |
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.IX Item "truncated" |
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.PD 0 |
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.IP "\fBnaq\fR" 4 |
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.IX Item "naq" |
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.PD |
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Normalize adaptive quantization. |
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.IP "\fBildct\fR" 4 |
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.IX Item "ildct" |
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Use interlaced \s-1DCT\s0. |
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.IP "\fBlow_delay\fR" 4 |
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.IX Item "low_delay" |
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Force low delay. |
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.IP "\fBglobal_header\fR" 4 |
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.IX Item "global_header" |
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Place global headers in extradata instead of every keyframe. |
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.IP "\fBbitexact\fR" 4 |
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.IX Item "bitexact" |
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Use only bitexact stuff (except (I)DCT). |
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.IP "\fBaic\fR" 4 |
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.IX Item "aic" |
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Apply H263 advanced intra coding / mpeg4 ac prediction. |
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.IP "\fBcbp\fR" 4 |
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.IX Item "cbp" |
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Deprecated, use mpegvideo private options instead. |
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.IP "\fBqprd\fR" 4 |
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.IX Item "qprd" |
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Deprecated, use mpegvideo private options instead. |
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.IP "\fBilme\fR" 4 |
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.IX Item "ilme" |
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Apply interlaced motion estimation. |
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.IP "\fBcgop\fR" 4 |
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.IX Item "cgop" |
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Use closed gop. |
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.RE |
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.RS 4 |
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.RE |
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.IP "\fBme_method\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
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.IX Item "me_method integer (encoding,video)" |
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Set motion estimation method. |
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.Sp |
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Possible values: |
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.RS 4 |
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.IP "\fBzero\fR" 4 |
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.IX Item "zero" |
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zero motion estimation (fastest) |
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.IP "\fBfull\fR" 4 |
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.IX Item "full" |
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full motion estimation (slowest) |
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.IP "\fBepzs\fR" 4 |
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.IX Item "epzs" |
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\&\s-1EPZS\s0 motion estimation (default) |
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.IP "\fBesa\fR" 4 |
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.IX Item "esa" |
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esa motion estimation (alias for full) |
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.IP "\fBtesa\fR" 4 |
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.IX Item "tesa" |
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tesa motion estimation |
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.IP "\fBdia\fR" 4 |
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.IX Item "dia" |
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dia motion estimation (alias for epzs) |
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.IP "\fBlog\fR" 4 |
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.IX Item "log" |
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log motion estimation |
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.IP "\fBphods\fR" 4 |
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.IX Item "phods" |
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phods motion estimation |
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.IP "\fBx1\fR" 4 |
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.IX Item "x1" |
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X1 motion estimation |
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.IP "\fBhex\fR" 4 |
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.IX Item "hex" |
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hex motion estimation |
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.IP "\fBumh\fR" 4 |
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.IX Item "umh" |
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umh motion estimation |
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.IP "\fBiter\fR" 4 |
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.IX Item "iter" |
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iter motion estimation |
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.RE |
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.RS 4 |
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.RE |
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293 |
.IP "\fBextradata_size\fR \fIinteger\fR" 4 |
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.IX Item "extradata_size integer" |
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Set extradata size. |
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296 |
.IP "\fBtime_base\fR \fIrational number\fR" 4 |
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.IX Item "time_base rational number" |
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Set codec time base. |
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.Sp |
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It is the fundamental unit of time (in seconds) in terms of which |
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frame timestamps are represented. For fixed-fps content, timebase |
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should be \f(CW\*(C`1 / frame_rate\*(C'\fR and timestamp increments should be |
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identically 1. |
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.IP "\fBg\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
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.IX Item "g integer (encoding,video)" |
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306 |
Set the group of picture size. Default value is 12. |
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.IP "\fBar\fR \fIinteger\fR \fB(\fR\fIdecoding/encoding,audio\fR\fB)\fR" 4 |
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.IX Item "ar integer (decoding/encoding,audio)" |
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Set audio sampling rate (in Hz). |
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.IP "\fBac\fR \fIinteger\fR \fB(\fR\fIdecoding/encoding,audio\fR\fB)\fR" 4 |
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.IX Item "ac integer (decoding/encoding,audio)" |
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Set number of audio channels. |
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.IP "\fBcutoff\fR \fIinteger\fR \fB(\fR\fIencoding,audio\fR\fB)\fR" 4 |
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.IX Item "cutoff integer (encoding,audio)" |
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Set cutoff bandwidth. |
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.IP "\fBframe_size\fR \fIinteger\fR \fB(\fR\fIencoding,audio\fR\fB)\fR" 4 |
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.IX Item "frame_size integer (encoding,audio)" |
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Set audio frame size. |
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.Sp |
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Each submitted frame except the last must contain exactly frame_size |
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samples per channel. May be 0 when the codec has |
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\&\s-1CODEC_CAP_VARIABLE_FRAME_SIZE\s0 set, in that case the frame size is not |
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restricted. It is set by some decoders to indicate constant frame |
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size. |
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.IP "\fBframe_number\fR \fIinteger\fR" 4 |
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.IX Item "frame_number integer" |
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Set the frame number. |
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.IP "\fBdelay\fR \fIinteger\fR" 4 |
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.IX Item "delay integer" |
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.PD 0 |
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.IP "\fBqcomp\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
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.IX Item "qcomp float (encoding,video)" |
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.PD |
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Set video quantizer scale compression (\s-1VBR\s0). It is used as a constant |
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in the ratecontrol equation. Recommended range for default rc_eq: |
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0.0\-1.0. |
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337 |
.IP "\fBqblur\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
338 |
.IX Item "qblur float (encoding,video)" |
|
|
339 |
Set video quantizer scale blur (\s-1VBR\s0). |
|
|
340 |
.IP "\fBqmin\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
341 |
.IX Item "qmin integer (encoding,video)" |
|
|
342 |
Set min video quantizer scale (\s-1VBR\s0). Must be included between \-1 and |
|
|
343 |
69, default value is 2. |
|
|
344 |
.IP "\fBqmax\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
345 |
.IX Item "qmax integer (encoding,video)" |
|
|
346 |
Set max video quantizer scale (\s-1VBR\s0). Must be included between \-1 and |
|
|
347 |
1024, default value is 31. |
|
|
348 |
.IP "\fBqdiff\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
349 |
.IX Item "qdiff integer (encoding,video)" |
|
|
350 |
Set max difference between the quantizer scale (\s-1VBR\s0). |
|
|
351 |
.IP "\fBbf\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
352 |
.IX Item "bf integer (encoding,video)" |
|
|
353 |
Set max number of B frames. |
|
|
354 |
.IP "\fBb_qfactor\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
355 |
.IX Item "b_qfactor float (encoding,video)" |
|
|
356 |
Set qp factor between P and B frames. |
|
|
357 |
.IP "\fBrc_strategy\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
358 |
.IX Item "rc_strategy integer (encoding,video)" |
|
|
359 |
Set ratecontrol method. |
|
|
360 |
.IP "\fBb_strategy\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
361 |
.IX Item "b_strategy integer (encoding,video)" |
|
|
362 |
Set strategy to choose between I/P/B\-frames. |
|
|
363 |
.IP "\fBps\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
364 |
.IX Item "ps integer (encoding,video)" |
|
|
365 |
Set \s-1RTP\s0 payload size in bytes. |
|
|
366 |
.IP "\fBmv_bits\fR \fIinteger\fR" 4 |
|
|
367 |
.IX Item "mv_bits integer" |
|
|
368 |
.PD 0 |
|
|
369 |
.IP "\fBheader_bits\fR \fIinteger\fR" 4 |
|
|
370 |
.IX Item "header_bits integer" |
|
|
371 |
.IP "\fBi_tex_bits\fR \fIinteger\fR" 4 |
|
|
372 |
.IX Item "i_tex_bits integer" |
|
|
373 |
.IP "\fBp_tex_bits\fR \fIinteger\fR" 4 |
|
|
374 |
.IX Item "p_tex_bits integer" |
|
|
375 |
.IP "\fBi_count\fR \fIinteger\fR" 4 |
|
|
376 |
.IX Item "i_count integer" |
|
|
377 |
.IP "\fBp_count\fR \fIinteger\fR" 4 |
|
|
378 |
.IX Item "p_count integer" |
|
|
379 |
.IP "\fBskip_count\fR \fIinteger\fR" 4 |
|
|
380 |
.IX Item "skip_count integer" |
|
|
381 |
.IP "\fBmisc_bits\fR \fIinteger\fR" 4 |
|
|
382 |
.IX Item "misc_bits integer" |
|
|
383 |
.IP "\fBframe_bits\fR \fIinteger\fR" 4 |
|
|
384 |
.IX Item "frame_bits integer" |
|
|
385 |
.IP "\fBcodec_tag\fR \fIinteger\fR" 4 |
|
|
386 |
.IX Item "codec_tag integer" |
|
|
387 |
.IP "\fBbug\fR \fIflags\fR \fB(\fR\fIdecoding,video\fR\fB)\fR" 4 |
|
|
388 |
.IX Item "bug flags (decoding,video)" |
|
|
389 |
.PD |
|
|
390 |
Workaround not auto detected encoder bugs. |
|
|
391 |
.Sp |
|
|
392 |
Possible values: |
|
|
393 |
.RS 4 |
|
|
394 |
.IP "\fBautodetect\fR" 4 |
|
|
395 |
.IX Item "autodetect" |
|
|
396 |
.PD 0 |
|
|
397 |
.IP "\fBold_msmpeg4\fR" 4 |
|
|
398 |
.IX Item "old_msmpeg4" |
|
|
399 |
.PD |
|
|
400 |
some old lavc generated msmpeg4v3 files (no autodetection) |
|
|
401 |
.IP "\fBxvid_ilace\fR" 4 |
|
|
402 |
.IX Item "xvid_ilace" |
|
|
403 |
Xvid interlacing bug (autodetected if fourcc==XVIX) |
|
|
404 |
.IP "\fBump4\fR" 4 |
|
|
405 |
.IX Item "ump4" |
|
|
406 |
(autodetected if fourcc==UMP4) |
|
|
407 |
.IP "\fBno_padding\fR" 4 |
|
|
408 |
.IX Item "no_padding" |
|
|
409 |
padding bug (autodetected) |
|
|
410 |
.IP "\fBamv\fR" 4 |
|
|
411 |
.IX Item "amv" |
|
|
412 |
.PD 0 |
|
|
413 |
.IP "\fBac_vlc\fR" 4 |
|
|
414 |
.IX Item "ac_vlc" |
|
|
415 |
.PD |
|
|
416 |
illegal vlc bug (autodetected per fourcc) |
|
|
417 |
.IP "\fBqpel_chroma\fR" 4 |
|
|
418 |
.IX Item "qpel_chroma" |
|
|
419 |
.PD 0 |
|
|
420 |
.IP "\fBstd_qpel\fR" 4 |
|
|
421 |
.IX Item "std_qpel" |
|
|
422 |
.PD |
|
|
423 |
old standard qpel (autodetected per fourcc/version) |
|
|
424 |
.IP "\fBqpel_chroma2\fR" 4 |
|
|
425 |
.IX Item "qpel_chroma2" |
|
|
426 |
.PD 0 |
|
|
427 |
.IP "\fBdirect_blocksize\fR" 4 |
|
|
428 |
.IX Item "direct_blocksize" |
|
|
429 |
.PD |
|
|
430 |
direct-qpel-blocksize bug (autodetected per fourcc/version) |
|
|
431 |
.IP "\fBedge\fR" 4 |
|
|
432 |
.IX Item "edge" |
|
|
433 |
edge padding bug (autodetected per fourcc/version) |
|
|
434 |
.IP "\fBhpel_chroma\fR" 4 |
|
|
435 |
.IX Item "hpel_chroma" |
|
|
436 |
.PD 0 |
|
|
437 |
.IP "\fBdc_clip\fR" 4 |
|
|
438 |
.IX Item "dc_clip" |
|
|
439 |
.IP "\fBms\fR" 4 |
|
|
440 |
.IX Item "ms" |
|
|
441 |
.PD |
|
|
442 |
Workaround various bugs in microsoft broken decoders. |
|
|
443 |
.IP "\fBtrunc\fR" 4 |
|
|
444 |
.IX Item "trunc" |
|
|
445 |
trancated frames |
|
|
446 |
.RE |
|
|
447 |
.RS 4 |
|
|
448 |
.RE |
|
|
449 |
.IP "\fBlelim\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
450 |
.IX Item "lelim integer (encoding,video)" |
|
|
451 |
Set single coefficient elimination threshold for luminance (negative |
|
|
452 |
values also consider \s-1DC\s0 coefficient). |
|
|
453 |
.IP "\fBcelim\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
454 |
.IX Item "celim integer (encoding,video)" |
|
|
455 |
Set single coefficient elimination threshold for chrominance (negative |
|
|
456 |
values also consider dc coefficient) |
|
|
457 |
.IP "\fBstrict\fR \fIinteger\fR \fB(\fR\fIdecoding/encoding,audio,video\fR\fB)\fR" 4 |
|
|
458 |
.IX Item "strict integer (decoding/encoding,audio,video)" |
|
|
459 |
Specify how strictly to follow the standards. |
|
|
460 |
.Sp |
|
|
461 |
Possible values: |
|
|
462 |
.RS 4 |
|
|
463 |
.IP "\fBvery\fR" 4 |
|
|
464 |
.IX Item "very" |
|
|
465 |
strictly conform to a older more strict version of the spec or reference software |
|
|
466 |
.IP "\fBstrict\fR" 4 |
|
|
467 |
.IX Item "strict" |
|
|
468 |
strictly conform to all the things in the spec no matter what consequences |
|
|
469 |
.IP "\fBnormal\fR" 4 |
|
|
470 |
.IX Item "normal" |
|
|
471 |
.PD 0 |
|
|
472 |
.IP "\fBunofficial\fR" 4 |
|
|
473 |
.IX Item "unofficial" |
|
|
474 |
.PD |
|
|
475 |
allow unofficial extensions |
|
|
476 |
.IP "\fBexperimental\fR" 4 |
|
|
477 |
.IX Item "experimental" |
|
|
478 |
allow non standardized experimental things, experimental |
|
|
479 |
(unfinished/work in progress/not well tested) decoders and encoders. |
|
|
480 |
Note: experimental decoders can pose a security risk, do not use this for |
|
|
481 |
decoding untrusted input. |
|
|
482 |
.RE |
|
|
483 |
.RS 4 |
|
|
484 |
.RE |
|
|
485 |
.IP "\fBb_qoffset\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
486 |
.IX Item "b_qoffset float (encoding,video)" |
|
|
487 |
Set \s-1QP\s0 offset between P and B frames. |
|
|
488 |
.IP "\fBerr_detect\fR \fIflags\fR \fB(\fR\fIdecoding,audio,video\fR\fB)\fR" 4 |
|
|
489 |
.IX Item "err_detect flags (decoding,audio,video)" |
|
|
490 |
Set error detection flags. |
|
|
491 |
.Sp |
|
|
492 |
Possible values: |
|
|
493 |
.RS 4 |
|
|
494 |
.IP "\fBcrccheck\fR" 4 |
|
|
495 |
.IX Item "crccheck" |
|
|
496 |
verify embedded CRCs |
|
|
497 |
.IP "\fBbitstream\fR" 4 |
|
|
498 |
.IX Item "bitstream" |
|
|
499 |
detect bitstream specification deviations |
|
|
500 |
.IP "\fBbuffer\fR" 4 |
|
|
501 |
.IX Item "buffer" |
|
|
502 |
detect improper bitstream length |
|
|
503 |
.IP "\fBexplode\fR" 4 |
|
|
504 |
.IX Item "explode" |
|
|
505 |
abort decoding on minor error detection |
|
|
506 |
.IP "\fBcareful\fR" 4 |
|
|
507 |
.IX Item "careful" |
|
|
508 |
consider things that violate the spec and have not been seen in the wild as errors |
|
|
509 |
.IP "\fBcompliant\fR" 4 |
|
|
510 |
.IX Item "compliant" |
|
|
511 |
consider all spec non compliancies as errors |
|
|
512 |
.IP "\fBaggressive\fR" 4 |
|
|
513 |
.IX Item "aggressive" |
|
|
514 |
consider things that a sane encoder should not do as an error |
|
|
515 |
.RE |
|
|
516 |
.RS 4 |
|
|
517 |
.RE |
|
|
518 |
.IP "\fBhas_b_frames\fR \fIinteger\fR" 4 |
|
|
519 |
.IX Item "has_b_frames integer" |
|
|
520 |
.PD 0 |
|
|
521 |
.IP "\fBblock_align\fR \fIinteger\fR" 4 |
|
|
522 |
.IX Item "block_align integer" |
|
|
523 |
.IP "\fBmpeg_quant\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
524 |
.IX Item "mpeg_quant integer (encoding,video)" |
|
|
525 |
.PD |
|
|
526 |
Use \s-1MPEG\s0 quantizers instead of H.263. |
|
|
527 |
.IP "\fBqsquish\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
528 |
.IX Item "qsquish float (encoding,video)" |
|
|
529 |
How to keep quantizer between qmin and qmax (0 = clip, 1 = use |
|
|
530 |
differentiable function). |
|
|
531 |
.IP "\fBrc_qmod_amp\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
532 |
.IX Item "rc_qmod_amp float (encoding,video)" |
|
|
533 |
Set experimental quantizer modulation. |
|
|
534 |
.IP "\fBrc_qmod_freq\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
535 |
.IX Item "rc_qmod_freq integer (encoding,video)" |
|
|
536 |
Set experimental quantizer modulation. |
|
|
537 |
.IP "\fBrc_override_count\fR \fIinteger\fR" 4 |
|
|
538 |
.IX Item "rc_override_count integer" |
|
|
539 |
.PD 0 |
|
|
540 |
.IP "\fBrc_eq\fR \fIstring\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
541 |
.IX Item "rc_eq string (encoding,video)" |
|
|
542 |
.PD |
|
|
543 |
Set rate control equation. When computing the expression, besides the |
|
|
544 |
standard functions defined in the section 'Expression Evaluation', the |
|
|
545 |
following functions are available: bits2qp(bits), qp2bits(qp). Also |
|
|
546 |
the following constants are available: iTex pTex tex mv fCode iCount |
|
|
547 |
mcVar var isI isP isB avgQP qComp avgIITex avgPITex avgPPTex avgBPTex |
|
|
548 |
avgTex. |
|
|
549 |
.IP "\fBmaxrate\fR \fIinteger\fR \fB(\fR\fIencoding,audio,video\fR\fB)\fR" 4 |
|
|
550 |
.IX Item "maxrate integer (encoding,audio,video)" |
|
|
551 |
Set max bitrate tolerance (in bits/s). Requires bufsize to be set. |
|
|
552 |
.IP "\fBminrate\fR \fIinteger\fR \fB(\fR\fIencoding,audio,video\fR\fB)\fR" 4 |
|
|
553 |
.IX Item "minrate integer (encoding,audio,video)" |
|
|
554 |
Set min bitrate tolerance (in bits/s). Most useful in setting up a \s-1CBR\s0 |
|
|
555 |
encode. It is of little use elsewise. |
|
|
556 |
.IP "\fBbufsize\fR \fIinteger\fR \fB(\fR\fIencoding,audio,video\fR\fB)\fR" 4 |
|
|
557 |
.IX Item "bufsize integer (encoding,audio,video)" |
|
|
558 |
Set ratecontrol buffer size (in bits). |
|
|
559 |
.IP "\fBrc_buf_aggressivity\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
560 |
.IX Item "rc_buf_aggressivity float (encoding,video)" |
|
|
561 |
Currently useless. |
|
|
562 |
.IP "\fBi_qfactor\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
563 |
.IX Item "i_qfactor float (encoding,video)" |
|
|
564 |
Set \s-1QP\s0 factor between P and I frames. |
|
|
565 |
.IP "\fBi_qoffset\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
566 |
.IX Item "i_qoffset float (encoding,video)" |
|
|
567 |
Set \s-1QP\s0 offset between P and I frames. |
|
|
568 |
.IP "\fBrc_init_cplx\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
569 |
.IX Item "rc_init_cplx float (encoding,video)" |
|
|
570 |
Set initial complexity for 1\-pass encoding. |
|
|
571 |
.IP "\fBdct\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
572 |
.IX Item "dct integer (encoding,video)" |
|
|
573 |
Set \s-1DCT\s0 algorithm. |
|
|
574 |
.Sp |
|
|
575 |
Possible values: |
|
|
576 |
.RS 4 |
|
|
577 |
.IP "\fBauto\fR" 4 |
|
|
578 |
.IX Item "auto" |
|
|
579 |
autoselect a good one (default) |
|
|
580 |
.IP "\fBfastint\fR" 4 |
|
|
581 |
.IX Item "fastint" |
|
|
582 |
fast integer |
|
|
583 |
.IP "\fBint\fR" 4 |
|
|
584 |
.IX Item "int" |
|
|
585 |
accurate integer |
|
|
586 |
.IP "\fBmmx\fR" 4 |
|
|
587 |
.IX Item "mmx" |
|
|
588 |
.PD 0 |
|
|
589 |
.IP "\fBaltivec\fR" 4 |
|
|
590 |
.IX Item "altivec" |
|
|
591 |
.IP "\fBfaan\fR" 4 |
|
|
592 |
.IX Item "faan" |
|
|
593 |
.PD |
|
|
594 |
floating point \s-1AAN\s0 \s-1DCT\s0 |
|
|
595 |
.RE |
|
|
596 |
.RS 4 |
|
|
597 |
.RE |
|
|
598 |
.IP "\fBlumi_mask\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
599 |
.IX Item "lumi_mask float (encoding,video)" |
|
|
600 |
Compress bright areas stronger than medium ones. |
|
|
601 |
.IP "\fBtcplx_mask\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
602 |
.IX Item "tcplx_mask float (encoding,video)" |
|
|
603 |
Set temporal complexity masking. |
|
|
604 |
.IP "\fBscplx_mask\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
605 |
.IX Item "scplx_mask float (encoding,video)" |
|
|
606 |
Set spatial complexity masking. |
|
|
607 |
.IP "\fBp_mask\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
608 |
.IX Item "p_mask float (encoding,video)" |
|
|
609 |
Set inter masking. |
|
|
610 |
.IP "\fBdark_mask\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
611 |
.IX Item "dark_mask float (encoding,video)" |
|
|
612 |
Compress dark areas stronger than medium ones. |
|
|
613 |
.IP "\fBidct\fR \fIinteger\fR \fB(\fR\fIdecoding/encoding,video\fR\fB)\fR" 4 |
|
|
614 |
.IX Item "idct integer (decoding/encoding,video)" |
|
|
615 |
Select \s-1IDCT\s0 implementation. |
|
|
616 |
.Sp |
|
|
617 |
Possible values: |
|
|
618 |
.RS 4 |
|
|
619 |
.IP "\fBauto\fR" 4 |
|
|
620 |
.IX Item "auto" |
|
|
621 |
.PD 0 |
|
|
622 |
.IP "\fBint\fR" 4 |
|
|
623 |
.IX Item "int" |
|
|
624 |
.IP "\fBsimple\fR" 4 |
|
|
625 |
.IX Item "simple" |
|
|
626 |
.IP "\fBsimplemmx\fR" 4 |
|
|
627 |
.IX Item "simplemmx" |
|
|
628 |
.IP "\fBarm\fR" 4 |
|
|
629 |
.IX Item "arm" |
|
|
630 |
.IP "\fBaltivec\fR" 4 |
|
|
631 |
.IX Item "altivec" |
|
|
632 |
.IP "\fBsh4\fR" 4 |
|
|
633 |
.IX Item "sh4" |
|
|
634 |
.IP "\fBsimplearm\fR" 4 |
|
|
635 |
.IX Item "simplearm" |
|
|
636 |
.IP "\fBsimplearmv5te\fR" 4 |
|
|
637 |
.IX Item "simplearmv5te" |
|
|
638 |
.IP "\fBsimplearmv6\fR" 4 |
|
|
639 |
.IX Item "simplearmv6" |
|
|
640 |
.IP "\fBsimpleneon\fR" 4 |
|
|
641 |
.IX Item "simpleneon" |
|
|
642 |
.IP "\fBsimplealpha\fR" 4 |
|
|
643 |
.IX Item "simplealpha" |
|
|
644 |
.IP "\fBipp\fR" 4 |
|
|
645 |
.IX Item "ipp" |
|
|
646 |
.IP "\fBxvidmmx\fR" 4 |
|
|
647 |
.IX Item "xvidmmx" |
|
|
648 |
.IP "\fBfaani\fR" 4 |
|
|
649 |
.IX Item "faani" |
|
|
650 |
.PD |
|
|
651 |
floating point \s-1AAN\s0 \s-1IDCT\s0 |
|
|
652 |
.RE |
|
|
653 |
.RS 4 |
|
|
654 |
.RE |
|
|
655 |
.IP "\fBslice_count\fR \fIinteger\fR" 4 |
|
|
656 |
.IX Item "slice_count integer" |
|
|
657 |
.PD 0 |
|
|
658 |
.IP "\fBec\fR \fIflags\fR \fB(\fR\fIdecoding,video\fR\fB)\fR" 4 |
|
|
659 |
.IX Item "ec flags (decoding,video)" |
|
|
660 |
.PD |
|
|
661 |
Set error concealment strategy. |
|
|
662 |
.Sp |
|
|
663 |
Possible values: |
|
|
664 |
.RS 4 |
|
|
665 |
.IP "\fBguess_mvs\fR" 4 |
|
|
666 |
.IX Item "guess_mvs" |
|
|
667 |
iterative motion vector (\s-1MV\s0) search (slow) |
|
|
668 |
.IP "\fBdeblock\fR" 4 |
|
|
669 |
.IX Item "deblock" |
|
|
670 |
use strong deblock filter for damaged MBs |
|
|
671 |
.RE |
|
|
672 |
.RS 4 |
|
|
673 |
.RE |
|
|
674 |
.IP "\fBbits_per_coded_sample\fR \fIinteger\fR" 4 |
|
|
675 |
.IX Item "bits_per_coded_sample integer" |
|
|
676 |
.PD 0 |
|
|
677 |
.IP "\fBpred\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
678 |
.IX Item "pred integer (encoding,video)" |
|
|
679 |
.PD |
|
|
680 |
Set prediction method. |
|
|
681 |
.Sp |
|
|
682 |
Possible values: |
|
|
683 |
.RS 4 |
|
|
684 |
.IP "\fBleft\fR" 4 |
|
|
685 |
.IX Item "left" |
|
|
686 |
.PD 0 |
|
|
687 |
.IP "\fBplane\fR" 4 |
|
|
688 |
.IX Item "plane" |
|
|
689 |
.IP "\fBmedian\fR" 4 |
|
|
690 |
.IX Item "median" |
|
|
691 |
.RE |
|
|
692 |
.RS 4 |
|
|
693 |
.RE |
|
|
694 |
.IP "\fBaspect\fR \fIrational number\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
695 |
.IX Item "aspect rational number (encoding,video)" |
|
|
696 |
.PD |
|
|
697 |
Set sample aspect ratio. |
|
|
698 |
.IP "\fBdebug\fR \fIflags\fR \fB(\fR\fIdecoding/encoding,audio,video,subtitles\fR\fB)\fR" 4 |
|
|
699 |
.IX Item "debug flags (decoding/encoding,audio,video,subtitles)" |
|
|
700 |
Print specific debug info. |
|
|
701 |
.Sp |
|
|
702 |
Possible values: |
|
|
703 |
.RS 4 |
|
|
704 |
.IP "\fBpict\fR" 4 |
|
|
705 |
.IX Item "pict" |
|
|
706 |
picture info |
|
|
707 |
.IP "\fBrc\fR" 4 |
|
|
708 |
.IX Item "rc" |
|
|
709 |
rate control |
|
|
710 |
.IP "\fBbitstream\fR" 4 |
|
|
711 |
.IX Item "bitstream" |
|
|
712 |
.PD 0 |
|
|
713 |
.IP "\fBmb_type\fR" 4 |
|
|
714 |
.IX Item "mb_type" |
|
|
715 |
.PD |
|
|
716 |
macroblock (\s-1MB\s0) type |
|
|
717 |
.IP "\fBqp\fR" 4 |
|
|
718 |
.IX Item "qp" |
|
|
719 |
per-block quantization parameter (\s-1QP\s0) |
|
|
720 |
.IP "\fBmv\fR" 4 |
|
|
721 |
.IX Item "mv" |
|
|
722 |
motion vector |
|
|
723 |
.IP "\fBdct_coeff\fR" 4 |
|
|
724 |
.IX Item "dct_coeff" |
|
|
725 |
.PD 0 |
|
|
726 |
.IP "\fBskip\fR" 4 |
|
|
727 |
.IX Item "skip" |
|
|
728 |
.IP "\fBstartcode\fR" 4 |
|
|
729 |
.IX Item "startcode" |
|
|
730 |
.IP "\fBpts\fR" 4 |
|
|
731 |
.IX Item "pts" |
|
|
732 |
.IP "\fBer\fR" 4 |
|
|
733 |
.IX Item "er" |
|
|
734 |
.PD |
|
|
735 |
error recognition |
|
|
736 |
.IP "\fBmmco\fR" 4 |
|
|
737 |
.IX Item "mmco" |
|
|
738 |
memory management control operations (H.264) |
|
|
739 |
.IP "\fBbugs\fR" 4 |
|
|
740 |
.IX Item "bugs" |
|
|
741 |
.PD 0 |
|
|
742 |
.IP "\fBvis_qp\fR" 4 |
|
|
743 |
.IX Item "vis_qp" |
|
|
744 |
.PD |
|
|
745 |
visualize quantization parameter (\s-1QP\s0), lower \s-1QP\s0 are tinted greener |
|
|
746 |
.IP "\fBvis_mb_type\fR" 4 |
|
|
747 |
.IX Item "vis_mb_type" |
|
|
748 |
visualize block types |
|
|
749 |
.IP "\fBbuffers\fR" 4 |
|
|
750 |
.IX Item "buffers" |
|
|
751 |
picture buffer allocations |
|
|
752 |
.IP "\fBthread_ops\fR" 4 |
|
|
753 |
.IX Item "thread_ops" |
|
|
754 |
threading operations |
|
|
755 |
.RE |
|
|
756 |
.RS 4 |
|
|
757 |
.RE |
|
|
758 |
.IP "\fBvismv\fR \fIinteger\fR \fB(\fR\fIdecoding,video\fR\fB)\fR" 4 |
|
|
759 |
.IX Item "vismv integer (decoding,video)" |
|
|
760 |
Visualize motion vectors (MVs). |
|
|
761 |
.Sp |
|
|
762 |
Possible values: |
|
|
763 |
.RS 4 |
|
|
764 |
.IP "\fBpf\fR" 4 |
|
|
765 |
.IX Item "pf" |
|
|
766 |
forward predicted MVs of P\-frames |
|
|
767 |
.IP "\fBbf\fR" 4 |
|
|
768 |
.IX Item "bf" |
|
|
769 |
forward predicted MVs of B\-frames |
|
|
770 |
.IP "\fBbb\fR" 4 |
|
|
771 |
.IX Item "bb" |
|
|
772 |
backward predicted MVs of B\-frames |
|
|
773 |
.RE |
|
|
774 |
.RS 4 |
|
|
775 |
.RE |
|
|
776 |
.IP "\fBcmp\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
777 |
.IX Item "cmp integer (encoding,video)" |
|
|
778 |
Set full pel me compare function. |
|
|
779 |
.Sp |
|
|
780 |
Possible values: |
|
|
781 |
.RS 4 |
|
|
782 |
.IP "\fBsad\fR" 4 |
|
|
783 |
.IX Item "sad" |
|
|
784 |
sum of absolute differences, fast (default) |
|
|
785 |
.IP "\fBsse\fR" 4 |
|
|
786 |
.IX Item "sse" |
|
|
787 |
sum of squared errors |
|
|
788 |
.IP "\fBsatd\fR" 4 |
|
|
789 |
.IX Item "satd" |
|
|
790 |
sum of absolute Hadamard transformed differences |
|
|
791 |
.IP "\fBdct\fR" 4 |
|
|
792 |
.IX Item "dct" |
|
|
793 |
sum of absolute \s-1DCT\s0 transformed differences |
|
|
794 |
.IP "\fBpsnr\fR" 4 |
|
|
795 |
.IX Item "psnr" |
|
|
796 |
sum of squared quantization errors (avoid, low quality) |
|
|
797 |
.IP "\fBbit\fR" 4 |
|
|
798 |
.IX Item "bit" |
|
|
799 |
number of bits needed for the block |
|
|
800 |
.IP "\fBrd\fR" 4 |
|
|
801 |
.IX Item "rd" |
|
|
802 |
rate distortion optimal, slow |
|
|
803 |
.IP "\fBzero\fR" 4 |
|
|
804 |
.IX Item "zero" |
|
|
805 |
|
|
|
806 |
.IP "\fBvsad\fR" 4 |
|
|
807 |
.IX Item "vsad" |
|
|
808 |
sum of absolute vertical differences |
|
|
809 |
.IP "\fBvsse\fR" 4 |
|
|
810 |
.IX Item "vsse" |
|
|
811 |
sum of squared vertical differences |
|
|
812 |
.IP "\fBnsse\fR" 4 |
|
|
813 |
.IX Item "nsse" |
|
|
814 |
noise preserving sum of squared differences |
|
|
815 |
.IP "\fBw53\fR" 4 |
|
|
816 |
.IX Item "w53" |
|
|
817 |
5/3 wavelet, only used in snow |
|
|
818 |
.IP "\fBw97\fR" 4 |
|
|
819 |
.IX Item "w97" |
|
|
820 |
9/7 wavelet, only used in snow |
|
|
821 |
.IP "\fBdctmax\fR" 4 |
|
|
822 |
.IX Item "dctmax" |
|
|
823 |
.PD 0 |
|
|
824 |
.IP "\fBchroma\fR" 4 |
|
|
825 |
.IX Item "chroma" |
|
|
826 |
.RE |
|
|
827 |
.RS 4 |
|
|
828 |
.RE |
|
|
829 |
.IP "\fBsubcmp\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
830 |
.IX Item "subcmp integer (encoding,video)" |
|
|
831 |
.PD |
|
|
832 |
Set sub pel me compare function. |
|
|
833 |
.Sp |
|
|
834 |
Possible values: |
|
|
835 |
.RS 4 |
|
|
836 |
.IP "\fBsad\fR" 4 |
|
|
837 |
.IX Item "sad" |
|
|
838 |
sum of absolute differences, fast (default) |
|
|
839 |
.IP "\fBsse\fR" 4 |
|
|
840 |
.IX Item "sse" |
|
|
841 |
sum of squared errors |
|
|
842 |
.IP "\fBsatd\fR" 4 |
|
|
843 |
.IX Item "satd" |
|
|
844 |
sum of absolute Hadamard transformed differences |
|
|
845 |
.IP "\fBdct\fR" 4 |
|
|
846 |
.IX Item "dct" |
|
|
847 |
sum of absolute \s-1DCT\s0 transformed differences |
|
|
848 |
.IP "\fBpsnr\fR" 4 |
|
|
849 |
.IX Item "psnr" |
|
|
850 |
sum of squared quantization errors (avoid, low quality) |
|
|
851 |
.IP "\fBbit\fR" 4 |
|
|
852 |
.IX Item "bit" |
|
|
853 |
number of bits needed for the block |
|
|
854 |
.IP "\fBrd\fR" 4 |
|
|
855 |
.IX Item "rd" |
|
|
856 |
rate distortion optimal, slow |
|
|
857 |
.IP "\fBzero\fR" 4 |
|
|
858 |
.IX Item "zero" |
|
|
859 |
|
|
|
860 |
.IP "\fBvsad\fR" 4 |
|
|
861 |
.IX Item "vsad" |
|
|
862 |
sum of absolute vertical differences |
|
|
863 |
.IP "\fBvsse\fR" 4 |
|
|
864 |
.IX Item "vsse" |
|
|
865 |
sum of squared vertical differences |
|
|
866 |
.IP "\fBnsse\fR" 4 |
|
|
867 |
.IX Item "nsse" |
|
|
868 |
noise preserving sum of squared differences |
|
|
869 |
.IP "\fBw53\fR" 4 |
|
|
870 |
.IX Item "w53" |
|
|
871 |
5/3 wavelet, only used in snow |
|
|
872 |
.IP "\fBw97\fR" 4 |
|
|
873 |
.IX Item "w97" |
|
|
874 |
9/7 wavelet, only used in snow |
|
|
875 |
.IP "\fBdctmax\fR" 4 |
|
|
876 |
.IX Item "dctmax" |
|
|
877 |
.PD 0 |
|
|
878 |
.IP "\fBchroma\fR" 4 |
|
|
879 |
.IX Item "chroma" |
|
|
880 |
.RE |
|
|
881 |
.RS 4 |
|
|
882 |
.RE |
|
|
883 |
.IP "\fBmbcmp\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
884 |
.IX Item "mbcmp integer (encoding,video)" |
|
|
885 |
.PD |
|
|
886 |
Set macroblock compare function. |
|
|
887 |
.Sp |
|
|
888 |
Possible values: |
|
|
889 |
.RS 4 |
|
|
890 |
.IP "\fBsad\fR" 4 |
|
|
891 |
.IX Item "sad" |
|
|
892 |
sum of absolute differences, fast (default) |
|
|
893 |
.IP "\fBsse\fR" 4 |
|
|
894 |
.IX Item "sse" |
|
|
895 |
sum of squared errors |
|
|
896 |
.IP "\fBsatd\fR" 4 |
|
|
897 |
.IX Item "satd" |
|
|
898 |
sum of absolute Hadamard transformed differences |
|
|
899 |
.IP "\fBdct\fR" 4 |
|
|
900 |
.IX Item "dct" |
|
|
901 |
sum of absolute \s-1DCT\s0 transformed differences |
|
|
902 |
.IP "\fBpsnr\fR" 4 |
|
|
903 |
.IX Item "psnr" |
|
|
904 |
sum of squared quantization errors (avoid, low quality) |
|
|
905 |
.IP "\fBbit\fR" 4 |
|
|
906 |
.IX Item "bit" |
|
|
907 |
number of bits needed for the block |
|
|
908 |
.IP "\fBrd\fR" 4 |
|
|
909 |
.IX Item "rd" |
|
|
910 |
rate distortion optimal, slow |
|
|
911 |
.IP "\fBzero\fR" 4 |
|
|
912 |
.IX Item "zero" |
|
|
913 |
|
|
|
914 |
.IP "\fBvsad\fR" 4 |
|
|
915 |
.IX Item "vsad" |
|
|
916 |
sum of absolute vertical differences |
|
|
917 |
.IP "\fBvsse\fR" 4 |
|
|
918 |
.IX Item "vsse" |
|
|
919 |
sum of squared vertical differences |
|
|
920 |
.IP "\fBnsse\fR" 4 |
|
|
921 |
.IX Item "nsse" |
|
|
922 |
noise preserving sum of squared differences |
|
|
923 |
.IP "\fBw53\fR" 4 |
|
|
924 |
.IX Item "w53" |
|
|
925 |
5/3 wavelet, only used in snow |
|
|
926 |
.IP "\fBw97\fR" 4 |
|
|
927 |
.IX Item "w97" |
|
|
928 |
9/7 wavelet, only used in snow |
|
|
929 |
.IP "\fBdctmax\fR" 4 |
|
|
930 |
.IX Item "dctmax" |
|
|
931 |
.PD 0 |
|
|
932 |
.IP "\fBchroma\fR" 4 |
|
|
933 |
.IX Item "chroma" |
|
|
934 |
.RE |
|
|
935 |
.RS 4 |
|
|
936 |
.RE |
|
|
937 |
.IP "\fBildctcmp\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
938 |
.IX Item "ildctcmp integer (encoding,video)" |
|
|
939 |
.PD |
|
|
940 |
Set interlaced dct compare function. |
|
|
941 |
.Sp |
|
|
942 |
Possible values: |
|
|
943 |
.RS 4 |
|
|
944 |
.IP "\fBsad\fR" 4 |
|
|
945 |
.IX Item "sad" |
|
|
946 |
sum of absolute differences, fast (default) |
|
|
947 |
.IP "\fBsse\fR" 4 |
|
|
948 |
.IX Item "sse" |
|
|
949 |
sum of squared errors |
|
|
950 |
.IP "\fBsatd\fR" 4 |
|
|
951 |
.IX Item "satd" |
|
|
952 |
sum of absolute Hadamard transformed differences |
|
|
953 |
.IP "\fBdct\fR" 4 |
|
|
954 |
.IX Item "dct" |
|
|
955 |
sum of absolute \s-1DCT\s0 transformed differences |
|
|
956 |
.IP "\fBpsnr\fR" 4 |
|
|
957 |
.IX Item "psnr" |
|
|
958 |
sum of squared quantization errors (avoid, low quality) |
|
|
959 |
.IP "\fBbit\fR" 4 |
|
|
960 |
.IX Item "bit" |
|
|
961 |
number of bits needed for the block |
|
|
962 |
.IP "\fBrd\fR" 4 |
|
|
963 |
.IX Item "rd" |
|
|
964 |
rate distortion optimal, slow |
|
|
965 |
.IP "\fBzero\fR" 4 |
|
|
966 |
.IX Item "zero" |
|
|
967 |
|
|
|
968 |
.IP "\fBvsad\fR" 4 |
|
|
969 |
.IX Item "vsad" |
|
|
970 |
sum of absolute vertical differences |
|
|
971 |
.IP "\fBvsse\fR" 4 |
|
|
972 |
.IX Item "vsse" |
|
|
973 |
sum of squared vertical differences |
|
|
974 |
.IP "\fBnsse\fR" 4 |
|
|
975 |
.IX Item "nsse" |
|
|
976 |
noise preserving sum of squared differences |
|
|
977 |
.IP "\fBw53\fR" 4 |
|
|
978 |
.IX Item "w53" |
|
|
979 |
5/3 wavelet, only used in snow |
|
|
980 |
.IP "\fBw97\fR" 4 |
|
|
981 |
.IX Item "w97" |
|
|
982 |
9/7 wavelet, only used in snow |
|
|
983 |
.IP "\fBdctmax\fR" 4 |
|
|
984 |
.IX Item "dctmax" |
|
|
985 |
.PD 0 |
|
|
986 |
.IP "\fBchroma\fR" 4 |
|
|
987 |
.IX Item "chroma" |
|
|
988 |
.RE |
|
|
989 |
.RS 4 |
|
|
990 |
.RE |
|
|
991 |
.IP "\fBdia_size\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
992 |
.IX Item "dia_size integer (encoding,video)" |
|
|
993 |
.PD |
|
|
994 |
Set diamond type & size for motion estimation. |
|
|
995 |
.IP "\fBlast_pred\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
996 |
.IX Item "last_pred integer (encoding,video)" |
|
|
997 |
Set amount of motion predictors from the previous frame. |
|
|
998 |
.IP "\fBpreme\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
999 |
.IX Item "preme integer (encoding,video)" |
|
|
1000 |
Set pre motion estimation. |
|
|
1001 |
.IP "\fBprecmp\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1002 |
.IX Item "precmp integer (encoding,video)" |
|
|
1003 |
Set pre motion estimation compare function. |
|
|
1004 |
.Sp |
|
|
1005 |
Possible values: |
|
|
1006 |
.RS 4 |
|
|
1007 |
.IP "\fBsad\fR" 4 |
|
|
1008 |
.IX Item "sad" |
|
|
1009 |
sum of absolute differences, fast (default) |
|
|
1010 |
.IP "\fBsse\fR" 4 |
|
|
1011 |
.IX Item "sse" |
|
|
1012 |
sum of squared errors |
|
|
1013 |
.IP "\fBsatd\fR" 4 |
|
|
1014 |
.IX Item "satd" |
|
|
1015 |
sum of absolute Hadamard transformed differences |
|
|
1016 |
.IP "\fBdct\fR" 4 |
|
|
1017 |
.IX Item "dct" |
|
|
1018 |
sum of absolute \s-1DCT\s0 transformed differences |
|
|
1019 |
.IP "\fBpsnr\fR" 4 |
|
|
1020 |
.IX Item "psnr" |
|
|
1021 |
sum of squared quantization errors (avoid, low quality) |
|
|
1022 |
.IP "\fBbit\fR" 4 |
|
|
1023 |
.IX Item "bit" |
|
|
1024 |
number of bits needed for the block |
|
|
1025 |
.IP "\fBrd\fR" 4 |
|
|
1026 |
.IX Item "rd" |
|
|
1027 |
rate distortion optimal, slow |
|
|
1028 |
.IP "\fBzero\fR" 4 |
|
|
1029 |
.IX Item "zero" |
|
|
1030 |
|
|
|
1031 |
.IP "\fBvsad\fR" 4 |
|
|
1032 |
.IX Item "vsad" |
|
|
1033 |
sum of absolute vertical differences |
|
|
1034 |
.IP "\fBvsse\fR" 4 |
|
|
1035 |
.IX Item "vsse" |
|
|
1036 |
sum of squared vertical differences |
|
|
1037 |
.IP "\fBnsse\fR" 4 |
|
|
1038 |
.IX Item "nsse" |
|
|
1039 |
noise preserving sum of squared differences |
|
|
1040 |
.IP "\fBw53\fR" 4 |
|
|
1041 |
.IX Item "w53" |
|
|
1042 |
5/3 wavelet, only used in snow |
|
|
1043 |
.IP "\fBw97\fR" 4 |
|
|
1044 |
.IX Item "w97" |
|
|
1045 |
9/7 wavelet, only used in snow |
|
|
1046 |
.IP "\fBdctmax\fR" 4 |
|
|
1047 |
.IX Item "dctmax" |
|
|
1048 |
.PD 0 |
|
|
1049 |
.IP "\fBchroma\fR" 4 |
|
|
1050 |
.IX Item "chroma" |
|
|
1051 |
.RE |
|
|
1052 |
.RS 4 |
|
|
1053 |
.RE |
|
|
1054 |
.IP "\fBpre_dia_size\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1055 |
.IX Item "pre_dia_size integer (encoding,video)" |
|
|
1056 |
.PD |
|
|
1057 |
Set diamond type & size for motion estimation pre\-pass. |
|
|
1058 |
.IP "\fBsubq\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1059 |
.IX Item "subq integer (encoding,video)" |
|
|
1060 |
Set sub pel motion estimation quality. |
|
|
1061 |
.IP "\fBdtg_active_format\fR \fIinteger\fR" 4 |
|
|
1062 |
.IX Item "dtg_active_format integer" |
|
|
1063 |
.PD 0 |
|
|
1064 |
.IP "\fBme_range\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1065 |
.IX Item "me_range integer (encoding,video)" |
|
|
1066 |
.PD |
|
|
1067 |
Set limit motion vectors range (1023 for DivX player). |
|
|
1068 |
.IP "\fBibias\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1069 |
.IX Item "ibias integer (encoding,video)" |
|
|
1070 |
Set intra quant bias. |
|
|
1071 |
.IP "\fBpbias\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1072 |
.IX Item "pbias integer (encoding,video)" |
|
|
1073 |
Set inter quant bias. |
|
|
1074 |
.IP "\fBcolor_table_id\fR \fIinteger\fR" 4 |
|
|
1075 |
.IX Item "color_table_id integer" |
|
|
1076 |
.PD 0 |
|
|
1077 |
.IP "\fBglobal_quality\fR \fIinteger\fR \fB(\fR\fIencoding,audio,video\fR\fB)\fR" 4 |
|
|
1078 |
.IX Item "global_quality integer (encoding,audio,video)" |
|
|
1079 |
.IP "\fBcoder\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1080 |
.IX Item "coder integer (encoding,video)" |
|
|
1081 |
.PD |
|
|
1082 |
Possible values: |
|
|
1083 |
.RS 4 |
|
|
1084 |
.IP "\fBvlc\fR" 4 |
|
|
1085 |
.IX Item "vlc" |
|
|
1086 |
variable length coder / huffman coder |
|
|
1087 |
.IP "\fBac\fR" 4 |
|
|
1088 |
.IX Item "ac" |
|
|
1089 |
arithmetic coder |
|
|
1090 |
.IP "\fBraw\fR" 4 |
|
|
1091 |
.IX Item "raw" |
|
|
1092 |
raw (no encoding) |
|
|
1093 |
.IP "\fBrle\fR" 4 |
|
|
1094 |
.IX Item "rle" |
|
|
1095 |
run-length coder |
|
|
1096 |
.IP "\fBdeflate\fR" 4 |
|
|
1097 |
.IX Item "deflate" |
|
|
1098 |
deflate-based coder |
|
|
1099 |
.RE |
|
|
1100 |
.RS 4 |
|
|
1101 |
.RE |
|
|
1102 |
.IP "\fBcontext\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1103 |
.IX Item "context integer (encoding,video)" |
|
|
1104 |
Set context model. |
|
|
1105 |
.IP "\fBslice_flags\fR \fIinteger\fR" 4 |
|
|
1106 |
.IX Item "slice_flags integer" |
|
|
1107 |
.PD 0 |
|
|
1108 |
.IP "\fBxvmc_acceleration\fR \fIinteger\fR" 4 |
|
|
1109 |
.IX Item "xvmc_acceleration integer" |
|
|
1110 |
.IP "\fBmbd\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1111 |
.IX Item "mbd integer (encoding,video)" |
|
|
1112 |
.PD |
|
|
1113 |
Set macroblock decision algorithm (high quality mode). |
|
|
1114 |
.Sp |
|
|
1115 |
Possible values: |
|
|
1116 |
.RS 4 |
|
|
1117 |
.IP "\fBsimple\fR" 4 |
|
|
1118 |
.IX Item "simple" |
|
|
1119 |
use mbcmp (default) |
|
|
1120 |
.IP "\fBbits\fR" 4 |
|
|
1121 |
.IX Item "bits" |
|
|
1122 |
use fewest bits |
|
|
1123 |
.IP "\fBrd\fR" 4 |
|
|
1124 |
.IX Item "rd" |
|
|
1125 |
use best rate distortion |
|
|
1126 |
.RE |
|
|
1127 |
.RS 4 |
|
|
1128 |
.RE |
|
|
1129 |
.IP "\fBstream_codec_tag\fR \fIinteger\fR" 4 |
|
|
1130 |
.IX Item "stream_codec_tag integer" |
|
|
1131 |
.PD 0 |
|
|
1132 |
.IP "\fBsc_threshold\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1133 |
.IX Item "sc_threshold integer (encoding,video)" |
|
|
1134 |
.PD |
|
|
1135 |
Set scene change threshold. |
|
|
1136 |
.IP "\fBlmin\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1137 |
.IX Item "lmin integer (encoding,video)" |
|
|
1138 |
Set min lagrange factor (\s-1VBR\s0). |
|
|
1139 |
.IP "\fBlmax\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1140 |
.IX Item "lmax integer (encoding,video)" |
|
|
1141 |
Set max lagrange factor (\s-1VBR\s0). |
|
|
1142 |
.IP "\fBnr\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1143 |
.IX Item "nr integer (encoding,video)" |
|
|
1144 |
Set noise reduction. |
|
|
1145 |
.IP "\fBrc_init_occupancy\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1146 |
.IX Item "rc_init_occupancy integer (encoding,video)" |
|
|
1147 |
Set number of bits which should be loaded into the rc buffer before |
|
|
1148 |
decoding starts. |
|
|
1149 |
.IP "\fBflags2\fR \fIflags\fR \fB(\fR\fIdecoding/encoding,audio,video\fR\fB)\fR" 4 |
|
|
1150 |
.IX Item "flags2 flags (decoding/encoding,audio,video)" |
|
|
1151 |
Possible values: |
|
|
1152 |
.RS 4 |
|
|
1153 |
.IP "\fBfast\fR" 4 |
|
|
1154 |
.IX Item "fast" |
|
|
1155 |
Allow non spec compliant speedup tricks. |
|
|
1156 |
.IP "\fBsgop\fR" 4 |
|
|
1157 |
.IX Item "sgop" |
|
|
1158 |
Deprecated, use mpegvideo private options instead. |
|
|
1159 |
.IP "\fBnoout\fR" 4 |
|
|
1160 |
.IX Item "noout" |
|
|
1161 |
Skip bitstream encoding. |
|
|
1162 |
.IP "\fBignorecrop\fR" 4 |
|
|
1163 |
.IX Item "ignorecrop" |
|
|
1164 |
Ignore cropping information from sps. |
|
|
1165 |
.IP "\fBlocal_header\fR" 4 |
|
|
1166 |
.IX Item "local_header" |
|
|
1167 |
Place global headers at every keyframe instead of in extradata. |
|
|
1168 |
.IP "\fBchunks\fR" 4 |
|
|
1169 |
.IX Item "chunks" |
|
|
1170 |
Frame data might be split into multiple chunks. |
|
|
1171 |
.IP "\fBshowall\fR" 4 |
|
|
1172 |
.IX Item "showall" |
|
|
1173 |
Show all frames before the first keyframe. |
|
|
1174 |
.IP "\fBskiprd\fR" 4 |
|
|
1175 |
.IX Item "skiprd" |
|
|
1176 |
Deprecated, use mpegvideo private options instead. |
|
|
1177 |
.RE |
|
|
1178 |
.RS 4 |
|
|
1179 |
.RE |
|
|
1180 |
.IP "\fBerror\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1181 |
.IX Item "error integer (encoding,video)" |
|
|
1182 |
.PD 0 |
|
|
1183 |
.IP "\fBqns\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1184 |
.IX Item "qns integer (encoding,video)" |
|
|
1185 |
.PD |
|
|
1186 |
Deprecated, use mpegvideo private options instead. |
|
|
1187 |
.IP "\fBthreads\fR \fIinteger\fR \fB(\fR\fIdecoding/encoding,video\fR\fB)\fR" 4 |
|
|
1188 |
.IX Item "threads integer (decoding/encoding,video)" |
|
|
1189 |
Possible values: |
|
|
1190 |
.RS 4 |
|
|
1191 |
.IP "\fBauto\fR" 4 |
|
|
1192 |
.IX Item "auto" |
|
|
1193 |
detect a good number of threads |
|
|
1194 |
.RE |
|
|
1195 |
.RS 4 |
|
|
1196 |
.RE |
|
|
1197 |
.IP "\fBme_threshold\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1198 |
.IX Item "me_threshold integer (encoding,video)" |
|
|
1199 |
Set motion estimation threshold. |
|
|
1200 |
.IP "\fBmb_threshold\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1201 |
.IX Item "mb_threshold integer (encoding,video)" |
|
|
1202 |
Set macroblock threshold. |
|
|
1203 |
.IP "\fBdc\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1204 |
.IX Item "dc integer (encoding,video)" |
|
|
1205 |
Set intra_dc_precision. |
|
|
1206 |
.IP "\fBnssew\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1207 |
.IX Item "nssew integer (encoding,video)" |
|
|
1208 |
Set nsse weight. |
|
|
1209 |
.IP "\fBskip_top\fR \fIinteger\fR \fB(\fR\fIdecoding,video\fR\fB)\fR" 4 |
|
|
1210 |
.IX Item "skip_top integer (decoding,video)" |
|
|
1211 |
Set number of macroblock rows at the top which are skipped. |
|
|
1212 |
.IP "\fBskip_bottom\fR \fIinteger\fR \fB(\fR\fIdecoding,video\fR\fB)\fR" 4 |
|
|
1213 |
.IX Item "skip_bottom integer (decoding,video)" |
|
|
1214 |
Set number of macroblock rows at the bottom which are skipped. |
|
|
1215 |
.IP "\fBprofile\fR \fIinteger\fR \fB(\fR\fIencoding,audio,video\fR\fB)\fR" 4 |
|
|
1216 |
.IX Item "profile integer (encoding,audio,video)" |
|
|
1217 |
Possible values: |
|
|
1218 |
.RS 4 |
|
|
1219 |
.IP "\fBunknown\fR" 4 |
|
|
1220 |
.IX Item "unknown" |
|
|
1221 |
.PD 0 |
|
|
1222 |
.IP "\fBaac_main\fR" 4 |
|
|
1223 |
.IX Item "aac_main" |
|
|
1224 |
.IP "\fBaac_low\fR" 4 |
|
|
1225 |
.IX Item "aac_low" |
|
|
1226 |
.IP "\fBaac_ssr\fR" 4 |
|
|
1227 |
.IX Item "aac_ssr" |
|
|
1228 |
.IP "\fBaac_ltp\fR" 4 |
|
|
1229 |
.IX Item "aac_ltp" |
|
|
1230 |
.IP "\fBaac_he\fR" 4 |
|
|
1231 |
.IX Item "aac_he" |
|
|
1232 |
.IP "\fBaac_he_v2\fR" 4 |
|
|
1233 |
.IX Item "aac_he_v2" |
|
|
1234 |
.IP "\fBaac_ld\fR" 4 |
|
|
1235 |
.IX Item "aac_ld" |
|
|
1236 |
.IP "\fBaac_eld\fR" 4 |
|
|
1237 |
.IX Item "aac_eld" |
|
|
1238 |
.IP "\fBmpeg2_aac_low\fR" 4 |
|
|
1239 |
.IX Item "mpeg2_aac_low" |
|
|
1240 |
.IP "\fBmpeg2_aac_he\fR" 4 |
|
|
1241 |
.IX Item "mpeg2_aac_he" |
|
|
1242 |
.IP "\fBdts\fR" 4 |
|
|
1243 |
.IX Item "dts" |
|
|
1244 |
.IP "\fBdts_es\fR" 4 |
|
|
1245 |
.IX Item "dts_es" |
|
|
1246 |
.IP "\fBdts_96_24\fR" 4 |
|
|
1247 |
.IX Item "dts_96_24" |
|
|
1248 |
.IP "\fBdts_hd_hra\fR" 4 |
|
|
1249 |
.IX Item "dts_hd_hra" |
|
|
1250 |
.IP "\fBdts_hd_ma\fR" 4 |
|
|
1251 |
.IX Item "dts_hd_ma" |
|
|
1252 |
.RE |
|
|
1253 |
.RS 4 |
|
|
1254 |
.RE |
|
|
1255 |
.IP "\fBlevel\fR \fIinteger\fR \fB(\fR\fIencoding,audio,video\fR\fB)\fR" 4 |
|
|
1256 |
.IX Item "level integer (encoding,audio,video)" |
|
|
1257 |
.PD |
|
|
1258 |
Possible values: |
|
|
1259 |
.RS 4 |
|
|
1260 |
.IP "\fBunknown\fR" 4 |
|
|
1261 |
.IX Item "unknown" |
|
|
1262 |
.RE |
|
|
1263 |
.RS 4 |
|
|
1264 |
.RE |
|
|
1265 |
.PD 0 |
|
|
1266 |
.IP "\fBlowres\fR \fIinteger\fR \fB(\fR\fIdecoding,audio,video\fR\fB)\fR" 4 |
|
|
1267 |
.IX Item "lowres integer (decoding,audio,video)" |
|
|
1268 |
.PD |
|
|
1269 |
Decode at 1= 1/2, 2=1/4, 3=1/8 resolutions. |
|
|
1270 |
.IP "\fBskip_threshold\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1271 |
.IX Item "skip_threshold integer (encoding,video)" |
|
|
1272 |
Set frame skip threshold. |
|
|
1273 |
.IP "\fBskip_factor\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1274 |
.IX Item "skip_factor integer (encoding,video)" |
|
|
1275 |
Set frame skip factor. |
|
|
1276 |
.IP "\fBskip_exp\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1277 |
.IX Item "skip_exp integer (encoding,video)" |
|
|
1278 |
Set frame skip exponent. |
|
|
1279 |
.IP "\fBskipcmp\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1280 |
.IX Item "skipcmp integer (encoding,video)" |
|
|
1281 |
Set frame skip compare function. |
|
|
1282 |
.Sp |
|
|
1283 |
Possible values: |
|
|
1284 |
.RS 4 |
|
|
1285 |
.IP "\fBsad\fR" 4 |
|
|
1286 |
.IX Item "sad" |
|
|
1287 |
sum of absolute differences, fast (default) |
|
|
1288 |
.IP "\fBsse\fR" 4 |
|
|
1289 |
.IX Item "sse" |
|
|
1290 |
sum of squared errors |
|
|
1291 |
.IP "\fBsatd\fR" 4 |
|
|
1292 |
.IX Item "satd" |
|
|
1293 |
sum of absolute Hadamard transformed differences |
|
|
1294 |
.IP "\fBdct\fR" 4 |
|
|
1295 |
.IX Item "dct" |
|
|
1296 |
sum of absolute \s-1DCT\s0 transformed differences |
|
|
1297 |
.IP "\fBpsnr\fR" 4 |
|
|
1298 |
.IX Item "psnr" |
|
|
1299 |
sum of squared quantization errors (avoid, low quality) |
|
|
1300 |
.IP "\fBbit\fR" 4 |
|
|
1301 |
.IX Item "bit" |
|
|
1302 |
number of bits needed for the block |
|
|
1303 |
.IP "\fBrd\fR" 4 |
|
|
1304 |
.IX Item "rd" |
|
|
1305 |
rate distortion optimal, slow |
|
|
1306 |
.IP "\fBzero\fR" 4 |
|
|
1307 |
.IX Item "zero" |
|
|
1308 |
|
|
|
1309 |
.IP "\fBvsad\fR" 4 |
|
|
1310 |
.IX Item "vsad" |
|
|
1311 |
sum of absolute vertical differences |
|
|
1312 |
.IP "\fBvsse\fR" 4 |
|
|
1313 |
.IX Item "vsse" |
|
|
1314 |
sum of squared vertical differences |
|
|
1315 |
.IP "\fBnsse\fR" 4 |
|
|
1316 |
.IX Item "nsse" |
|
|
1317 |
noise preserving sum of squared differences |
|
|
1318 |
.IP "\fBw53\fR" 4 |
|
|
1319 |
.IX Item "w53" |
|
|
1320 |
5/3 wavelet, only used in snow |
|
|
1321 |
.IP "\fBw97\fR" 4 |
|
|
1322 |
.IX Item "w97" |
|
|
1323 |
9/7 wavelet, only used in snow |
|
|
1324 |
.IP "\fBdctmax\fR" 4 |
|
|
1325 |
.IX Item "dctmax" |
|
|
1326 |
.PD 0 |
|
|
1327 |
.IP "\fBchroma\fR" 4 |
|
|
1328 |
.IX Item "chroma" |
|
|
1329 |
.RE |
|
|
1330 |
.RS 4 |
|
|
1331 |
.RE |
|
|
1332 |
.IP "\fBborder_mask\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1333 |
.IX Item "border_mask float (encoding,video)" |
|
|
1334 |
.PD |
|
|
1335 |
Increase the quantizer for macroblocks close to borders. |
|
|
1336 |
.IP "\fBmblmin\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1337 |
.IX Item "mblmin integer (encoding,video)" |
|
|
1338 |
Set min macroblock lagrange factor (\s-1VBR\s0). |
|
|
1339 |
.IP "\fBmblmax\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1340 |
.IX Item "mblmax integer (encoding,video)" |
|
|
1341 |
Set max macroblock lagrange factor (\s-1VBR\s0). |
|
|
1342 |
.IP "\fBmepc\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1343 |
.IX Item "mepc integer (encoding,video)" |
|
|
1344 |
Set motion estimation bitrate penalty compensation (1.0 = 256). |
|
|
1345 |
.IP "\fBskip_loop_filter\fR \fIinteger\fR \fB(\fR\fIdecoding,video\fR\fB)\fR" 4 |
|
|
1346 |
.IX Item "skip_loop_filter integer (decoding,video)" |
|
|
1347 |
.PD 0 |
|
|
1348 |
.IP "\fBskip_idct\fR \fIinteger\fR \fB(\fR\fIdecoding,video\fR\fB)\fR" 4 |
|
|
1349 |
.IX Item "skip_idct integer (decoding,video)" |
|
|
1350 |
.IP "\fBskip_frame\fR \fIinteger\fR \fB(\fR\fIdecoding,video\fR\fB)\fR" 4 |
|
|
1351 |
.IX Item "skip_frame integer (decoding,video)" |
|
|
1352 |
.PD |
|
|
1353 |
Make decoder discard processing depending on the frame type selected |
|
|
1354 |
by the option value. |
|
|
1355 |
.Sp |
|
|
1356 |
\&\fBskip_loop_filter\fR skips frame loop filtering, \fBskip_idct\fR |
|
|
1357 |
skips frame IDCT/dequantization, \fBskip_frame\fR skips decoding. |
|
|
1358 |
.Sp |
|
|
1359 |
Possible values: |
|
|
1360 |
.RS 4 |
|
|
1361 |
.IP "\fBnone\fR" 4 |
|
|
1362 |
.IX Item "none" |
|
|
1363 |
Discard no frame. |
|
|
1364 |
.IP "\fBdefault\fR" 4 |
|
|
1365 |
.IX Item "default" |
|
|
1366 |
Discard useless frames like 0\-sized frames. |
|
|
1367 |
.IP "\fBnoref\fR" 4 |
|
|
1368 |
.IX Item "noref" |
|
|
1369 |
Discard all non-reference frames. |
|
|
1370 |
.IP "\fBbidir\fR" 4 |
|
|
1371 |
.IX Item "bidir" |
|
|
1372 |
Discard all bidirectional frames. |
|
|
1373 |
.IP "\fBnokey\fR" 4 |
|
|
1374 |
.IX Item "nokey" |
|
|
1375 |
Discard all frames excepts keyframes. |
|
|
1376 |
.IP "\fBall\fR" 4 |
|
|
1377 |
.IX Item "all" |
|
|
1378 |
Discard all frames. |
|
|
1379 |
.RE |
|
|
1380 |
.RS 4 |
|
|
1381 |
.Sp |
|
|
1382 |
Default value is \fBdefault\fR. |
|
|
1383 |
.RE |
|
|
1384 |
.IP "\fBbidir_refine\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1385 |
.IX Item "bidir_refine integer (encoding,video)" |
|
|
1386 |
Refine the two motion vectors used in bidirectional macroblocks. |
|
|
1387 |
.IP "\fBbrd_scale\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1388 |
.IX Item "brd_scale integer (encoding,video)" |
|
|
1389 |
Downscale frames for dynamic B\-frame decision. |
|
|
1390 |
.IP "\fBkeyint_min\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1391 |
.IX Item "keyint_min integer (encoding,video)" |
|
|
1392 |
Set minimum interval between IDR\-frames. |
|
|
1393 |
.IP "\fBrefs\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1394 |
.IX Item "refs integer (encoding,video)" |
|
|
1395 |
Set reference frames to consider for motion compensation. |
|
|
1396 |
.IP "\fBchromaoffset\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1397 |
.IX Item "chromaoffset integer (encoding,video)" |
|
|
1398 |
Set chroma qp offset from luma. |
|
|
1399 |
.IP "\fBtrellis\fR \fIinteger\fR \fB(\fR\fIencoding,audio,video\fR\fB)\fR" 4 |
|
|
1400 |
.IX Item "trellis integer (encoding,audio,video)" |
|
|
1401 |
Set rate-distortion optimal quantization. |
|
|
1402 |
.IP "\fBsc_factor\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1403 |
.IX Item "sc_factor integer (encoding,video)" |
|
|
1404 |
Set value multiplied by qscale for each frame and added to |
|
|
1405 |
scene_change_score. |
|
|
1406 |
.IP "\fBmv0_threshold\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1407 |
.IX Item "mv0_threshold integer (encoding,video)" |
|
|
1408 |
.PD 0 |
|
|
1409 |
.IP "\fBb_sensitivity\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1410 |
.IX Item "b_sensitivity integer (encoding,video)" |
|
|
1411 |
.PD |
|
|
1412 |
Adjust sensitivity of b_frame_strategy 1. |
|
|
1413 |
.IP "\fBcompression_level\fR \fIinteger\fR \fB(\fR\fIencoding,audio,video\fR\fB)\fR" 4 |
|
|
1414 |
.IX Item "compression_level integer (encoding,audio,video)" |
|
|
1415 |
.PD 0 |
|
|
1416 |
.IP "\fBmin_prediction_order\fR \fIinteger\fR \fB(\fR\fIencoding,audio\fR\fB)\fR" 4 |
|
|
1417 |
.IX Item "min_prediction_order integer (encoding,audio)" |
|
|
1418 |
.IP "\fBmax_prediction_order\fR \fIinteger\fR \fB(\fR\fIencoding,audio\fR\fB)\fR" 4 |
|
|
1419 |
.IX Item "max_prediction_order integer (encoding,audio)" |
|
|
1420 |
.IP "\fBtimecode_frame_start\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1421 |
.IX Item "timecode_frame_start integer (encoding,video)" |
|
|
1422 |
.PD |
|
|
1423 |
Set \s-1GOP\s0 timecode frame start number, in non drop frame format. |
|
|
1424 |
.IP "\fBrequest_channels\fR \fIinteger\fR \fB(\fR\fIdecoding,audio\fR\fB)\fR" 4 |
|
|
1425 |
.IX Item "request_channels integer (decoding,audio)" |
|
|
1426 |
Set desired number of audio channels. |
|
|
1427 |
.IP "\fBbits_per_raw_sample\fR \fIinteger\fR" 4 |
|
|
1428 |
.IX Item "bits_per_raw_sample integer" |
|
|
1429 |
.PD 0 |
|
|
1430 |
.IP "\fBchannel_layout\fR \fIinteger\fR \fB(\fR\fIdecoding/encoding,audio\fR\fB)\fR" 4 |
|
|
1431 |
.IX Item "channel_layout integer (decoding/encoding,audio)" |
|
|
1432 |
.PD |
|
|
1433 |
Possible values: |
|
|
1434 |
.RS 4 |
|
|
1435 |
.RE |
|
|
1436 |
.RS 4 |
|
|
1437 |
.RE |
|
|
1438 |
.IP "\fBrequest_channel_layout\fR \fIinteger\fR \fB(\fR\fIdecoding,audio\fR\fB)\fR" 4 |
|
|
1439 |
.IX Item "request_channel_layout integer (decoding,audio)" |
|
|
1440 |
Possible values: |
|
|
1441 |
.RS 4 |
|
|
1442 |
.RE |
|
|
1443 |
.RS 4 |
|
|
1444 |
.RE |
|
|
1445 |
.IP "\fBrc_max_vbv_use\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1446 |
.IX Item "rc_max_vbv_use float (encoding,video)" |
|
|
1447 |
.PD 0 |
|
|
1448 |
.IP "\fBrc_min_vbv_use\fR \fIfloat\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1449 |
.IX Item "rc_min_vbv_use float (encoding,video)" |
|
|
1450 |
.IP "\fBticks_per_frame\fR \fIinteger\fR \fB(\fR\fIdecoding/encoding,audio,video\fR\fB)\fR" 4 |
|
|
1451 |
.IX Item "ticks_per_frame integer (decoding/encoding,audio,video)" |
|
|
1452 |
.IP "\fBcolor_primaries\fR \fIinteger\fR \fB(\fR\fIdecoding/encoding,video\fR\fB)\fR" 4 |
|
|
1453 |
.IX Item "color_primaries integer (decoding/encoding,video)" |
|
|
1454 |
.IP "\fBcolor_trc\fR \fIinteger\fR \fB(\fR\fIdecoding/encoding,video\fR\fB)\fR" 4 |
|
|
1455 |
.IX Item "color_trc integer (decoding/encoding,video)" |
|
|
1456 |
.IP "\fBcolorspace\fR \fIinteger\fR \fB(\fR\fIdecoding/encoding,video\fR\fB)\fR" 4 |
|
|
1457 |
.IX Item "colorspace integer (decoding/encoding,video)" |
|
|
1458 |
.IP "\fBcolor_range\fR \fIinteger\fR \fB(\fR\fIdecoding/encoding,video\fR\fB)\fR" 4 |
|
|
1459 |
.IX Item "color_range integer (decoding/encoding,video)" |
|
|
1460 |
.IP "\fBchroma_sample_location\fR \fIinteger\fR \fB(\fR\fIdecoding/encoding,video\fR\fB)\fR" 4 |
|
|
1461 |
.IX Item "chroma_sample_location integer (decoding/encoding,video)" |
|
|
1462 |
.IP "\fBlog_level_offset\fR \fIinteger\fR" 4 |
|
|
1463 |
.IX Item "log_level_offset integer" |
|
|
1464 |
.PD |
|
|
1465 |
Set the log level offset. |
|
|
1466 |
.IP "\fBslices\fR \fIinteger\fR \fB(\fR\fIencoding,video\fR\fB)\fR" 4 |
|
|
1467 |
.IX Item "slices integer (encoding,video)" |
|
|
1468 |
Number of slices, used in parallelized encoding. |
|
|
1469 |
.IP "\fBthread_type\fR \fIflags\fR \fB(\fR\fIdecoding/encoding,video\fR\fB)\fR" 4 |
|
|
1470 |
.IX Item "thread_type flags (decoding/encoding,video)" |
|
|
1471 |
Select multithreading type. |
|
|
1472 |
.Sp |
|
|
1473 |
Possible values: |
|
|
1474 |
.RS 4 |
|
|
1475 |
.IP "\fBslice\fR" 4 |
|
|
1476 |
.IX Item "slice" |
|
|
1477 |
.PD 0 |
|
|
1478 |
.IP "\fBframe\fR" 4 |
|
|
1479 |
.IX Item "frame" |
|
|
1480 |
.RE |
|
|
1481 |
.RS 4 |
|
|
1482 |
.RE |
|
|
1483 |
.IP "\fBaudio_service_type\fR \fIinteger\fR \fB(\fR\fIencoding,audio\fR\fB)\fR" 4 |
|
|
1484 |
.IX Item "audio_service_type integer (encoding,audio)" |
|
|
1485 |
.PD |
|
|
1486 |
Set audio service type. |
|
|
1487 |
.Sp |
|
|
1488 |
Possible values: |
|
|
1489 |
.RS 4 |
|
|
1490 |
.IP "\fBma\fR" 4 |
|
|
1491 |
.IX Item "ma" |
|
|
1492 |
Main Audio Service |
|
|
1493 |
.IP "\fBef\fR" 4 |
|
|
1494 |
.IX Item "ef" |
|
|
1495 |
Effects |
|
|
1496 |
.IP "\fBvi\fR" 4 |
|
|
1497 |
.IX Item "vi" |
|
|
1498 |
Visually Impaired |
|
|
1499 |
.IP "\fBhi\fR" 4 |
|
|
1500 |
.IX Item "hi" |
|
|
1501 |
Hearing Impaired |
|
|
1502 |
.IP "\fBdi\fR" 4 |
|
|
1503 |
.IX Item "di" |
|
|
1504 |
Dialogue |
|
|
1505 |
.IP "\fBco\fR" 4 |
|
|
1506 |
.IX Item "co" |
|
|
1507 |
Commentary |
|
|
1508 |
.IP "\fBem\fR" 4 |
|
|
1509 |
.IX Item "em" |
|
|
1510 |
Emergency |
|
|
1511 |
.IP "\fBvo\fR" 4 |
|
|
1512 |
.IX Item "vo" |
|
|
1513 |
Voice Over |
|
|
1514 |
.IP "\fBka\fR" 4 |
|
|
1515 |
.IX Item "ka" |
|
|
1516 |
Karaoke |
|
|
1517 |
.RE |
|
|
1518 |
.RS 4 |
|
|
1519 |
.RE |
|
|
1520 |
.IP "\fBrequest_sample_fmt\fR \fIsample_fmt\fR \fB(\fR\fIdecoding,audio\fR\fB)\fR" 4 |
|
|
1521 |
.IX Item "request_sample_fmt sample_fmt (decoding,audio)" |
|
|
1522 |
Set sample format audio decoders should prefer. Default value is |
|
|
1523 |
\&\f(CW\*(C`none\*(C'\fR. |
|
|
1524 |
.IP "\fBpkt_timebase\fR \fIrational number\fR" 4 |
|
|
1525 |
.IX Item "pkt_timebase rational number" |
|
|
1526 |
.PD 0 |
|
|
1527 |
.IP "\fBsub_charenc\fR \fIencoding\fR \fB(\fR\fIdecoding,subtitles\fR\fB)\fR" 4 |
|
|
1528 |
.IX Item "sub_charenc encoding (decoding,subtitles)" |
|
|
1529 |
.PD |
|
|
1530 |
Set the input subtitles character encoding. |
|
|
1531 |
.IP "\fBfield_order\fR \fIfield_order\fR \fB(\fR\fIvideo\fR\fB)\fR" 4 |
|
|
1532 |
.IX Item "field_order field_order (video)" |
|
|
1533 |
Set/override the field order of the video. |
|
|
1534 |
Possible values: |
|
|
1535 |
.RS 4 |
|
|
1536 |
.IP "\fBprogressive\fR" 4 |
|
|
1537 |
.IX Item "progressive" |
|
|
1538 |
Progressive video |
|
|
1539 |
.IP "\fBtt\fR" 4 |
|
|
1540 |
.IX Item "tt" |
|
|
1541 |
Interlaced video, top field coded and displayed first |
|
|
1542 |
.IP "\fBbb\fR" 4 |
|
|
1543 |
.IX Item "bb" |
|
|
1544 |
Interlaced video, bottom field coded and displayed first |
|
|
1545 |
.IP "\fBtb\fR" 4 |
|
|
1546 |
.IX Item "tb" |
|
|
1547 |
Interlaced video, top coded first, bottom displayed first |
|
|
1548 |
.IP "\fBbt\fR" 4 |
|
|
1549 |
.IX Item "bt" |
|
|
1550 |
Interlaced video, bottom coded first, top displayed first |
|
|
1551 |
.RE |
|
|
1552 |
.RS 4 |
|
|
1553 |
.RE |
|
|
1554 |
.IP "\fBskip_alpha\fR \fIinteger\fR \fB(\fR\fIdecoding,video\fR\fB)\fR" 4 |
|
|
1555 |
.IX Item "skip_alpha integer (decoding,video)" |
|
|
1556 |
Set to 1 to disable processing alpha (transparency). This works like the |
|
|
1557 |
\&\fBgray\fR flag in the \fBflags\fR option which skips chroma information |
|
|
1558 |
instead of alpha. Default is 0. |
|
|
1559 |
.SH "DECODERS" |
|
|
1560 |
.IX Header "DECODERS" |
|
|
1561 |
Decoders are configured elements in FFmpeg which allow the decoding of |
|
|
1562 |
multimedia streams. |
|
|
1563 |
.PP |
|
|
1564 |
When you configure your FFmpeg build, all the supported native decoders |
|
|
1565 |
are enabled by default. Decoders requiring an external library must be enabled |
|
|
1566 |
manually via the corresponding \f(CW\*(C`\-\-enable\-lib\*(C'\fR option. You can list all |
|
|
1567 |
available decoders using the configure option \f(CW\*(C`\-\-list\-decoders\*(C'\fR. |
|
|
1568 |
.PP |
|
|
1569 |
You can disable all the decoders with the configure option |
|
|
1570 |
\&\f(CW\*(C`\-\-disable\-decoders\*(C'\fR and selectively enable / disable single decoders |
|
|
1571 |
with the options \f(CW\*(C`\-\-enable\-decoder=\f(CI\s-1DECODER\s0\f(CW\*(C'\fR / |
|
|
1572 |
\&\f(CW\*(C`\-\-disable\-decoder=\f(CI\s-1DECODER\s0\f(CW\*(C'\fR. |
|
|
1573 |
.PP |
|
|
1574 |
The option \f(CW\*(C`\-codecs\*(C'\fR of the ff* tools will display the list of |
|
|
1575 |
enabled decoders. |
|
|
1576 |
.SH "VIDEO DECODERS" |
|
|
1577 |
.IX Header "VIDEO DECODERS" |
|
|
1578 |
A description of some of the currently available video decoders |
|
|
1579 |
follows. |
|
|
1580 |
.Sh "rawvideo" |
|
|
1581 |
.IX Subsection "rawvideo" |
|
|
1582 |
Raw video decoder. |
|
|
1583 |
.PP |
|
|
1584 |
This decoder decodes rawvideo streams. |
|
|
1585 |
.PP |
|
|
1586 |
\fIOptions\fR |
|
|
1587 |
.IX Subsection "Options" |
|
|
1588 |
.IP "\fBtop\fR \fItop_field_first\fR" 4 |
|
|
1589 |
.IX Item "top top_field_first" |
|
|
1590 |
Specify the assumed field type of the input video. |
|
|
1591 |
.RS 4 |
|
|
1592 |
.IP "\fB\-1\fR" 4 |
|
|
1593 |
.IX Item "-1" |
|
|
1594 |
the video is assumed to be progressive (default) |
|
|
1595 |
.IP "\fB0\fR" 4 |
|
|
1596 |
.IX Item "0" |
|
|
1597 |
bottom-field-first is assumed |
|
|
1598 |
.IP "\fB1\fR" 4 |
|
|
1599 |
.IX Item "1" |
|
|
1600 |
top-field-first is assumed |
|
|
1601 |
.RE |
|
|
1602 |
.RS 4 |
|
|
1603 |
.RE |
|
|
1604 |
.SH "AUDIO DECODERS" |
|
|
1605 |
.IX Header "AUDIO DECODERS" |
|
|
1606 |
.Sh "ffwavesynth" |
|
|
1607 |
.IX Subsection "ffwavesynth" |
|
|
1608 |
Internal wave synthetizer. |
|
|
1609 |
.PP |
|
|
1610 |
This decoder generates wave patterns according to predefined sequences. Its |
|
|
1611 |
use is purely internal and the format of the data it accepts is not publicly |
|
|
1612 |
documented. |
|
|
1613 |
.Sh "libcelt" |
|
|
1614 |
.IX Subsection "libcelt" |
|
|
1615 |
libcelt decoder wrapper. |
|
|
1616 |
.PP |
|
|
1617 |
libcelt allows libavcodec to decode the Xiph \s-1CELT\s0 ultra-low delay audio codec. |
|
|
1618 |
Requires the presence of the libcelt headers and library during configuration. |
|
|
1619 |
You need to explicitly configure the build with \f(CW\*(C`\-\-enable\-libcelt\*(C'\fR. |
|
|
1620 |
.Sh "libgsm" |
|
|
1621 |
.IX Subsection "libgsm" |
|
|
1622 |
libgsm decoder wrapper. |
|
|
1623 |
.PP |
|
|
1624 |
libgsm allows libavcodec to decode the \s-1GSM\s0 full rate audio codec. Requires |
|
|
1625 |
the presence of the libgsm headers and library during configuration. You need |
|
|
1626 |
to explicitly configure the build with \f(CW\*(C`\-\-enable\-libgsm\*(C'\fR. |
|
|
1627 |
.PP |
|
|
1628 |
This decoder supports both the ordinary \s-1GSM\s0 and the Microsoft variant. |
|
|
1629 |
.Sh "libilbc" |
|
|
1630 |
.IX Subsection "libilbc" |
|
|
1631 |
libilbc decoder wrapper. |
|
|
1632 |
.PP |
|
|
1633 |
libilbc allows libavcodec to decode the Internet Low Bitrate Codec (iLBC) |
|
|
1634 |
audio codec. Requires the presence of the libilbc headers and library during |
|
|
1635 |
configuration. You need to explicitly configure the build with |
|
|
1636 |
\&\f(CW\*(C`\-\-enable\-libilbc\*(C'\fR. |
|
|
1637 |
.PP |
|
|
1638 |
\fIOptions\fR |
|
|
1639 |
.IX Subsection "Options" |
|
|
1640 |
.PP |
|
|
1641 |
The following option is supported by the libilbc wrapper. |
|
|
1642 |
.IP "\fBenhance\fR" 4 |
|
|
1643 |
.IX Item "enhance" |
|
|
1644 |
Enable the enhancement of the decoded audio when set to 1. The default |
|
|
1645 |
value is 0 (disabled). |
|
|
1646 |
.Sh "libopencore-amrnb" |
|
|
1647 |
.IX Subsection "libopencore-amrnb" |
|
|
1648 |
libopencore-amrnb decoder wrapper. |
|
|
1649 |
.PP |
|
|
1650 |
libopencore-amrnb allows libavcodec to decode the Adaptive Multi-Rate |
|
|
1651 |
Narrowband audio codec. Using it requires the presence of the |
|
|
1652 |
libopencore-amrnb headers and library during configuration. You need to |
|
|
1653 |
explicitly configure the build with \f(CW\*(C`\-\-enable\-libopencore\-amrnb\*(C'\fR. |
|
|
1654 |
.PP |
|
|
1655 |
An FFmpeg native decoder for AMR-NB exists, so users can decode AMR-NB |
|
|
1656 |
without this library. |
|
|
1657 |
.Sh "libopencore-amrwb" |
|
|
1658 |
.IX Subsection "libopencore-amrwb" |
|
|
1659 |
libopencore-amrwb decoder wrapper. |
|
|
1660 |
.PP |
|
|
1661 |
libopencore-amrwb allows libavcodec to decode the Adaptive Multi-Rate |
|
|
1662 |
Wideband audio codec. Using it requires the presence of the |
|
|
1663 |
libopencore-amrwb headers and library during configuration. You need to |
|
|
1664 |
explicitly configure the build with \f(CW\*(C`\-\-enable\-libopencore\-amrwb\*(C'\fR. |
|
|
1665 |
.PP |
|
|
1666 |
An FFmpeg native decoder for AMR-WB exists, so users can decode AMR-WB |
|
|
1667 |
without this library. |
|
|
1668 |
.Sh "libopus" |
|
|
1669 |
.IX Subsection "libopus" |
|
|
1670 |
libopus decoder wrapper. |
|
|
1671 |
.PP |
|
|
1672 |
libopus allows libavcodec to decode the Opus Interactive Audio Codec. |
|
|
1673 |
Requires the presence of the libopus headers and library during |
|
|
1674 |
configuration. You need to explicitly configure the build with |
|
|
1675 |
\&\f(CW\*(C`\-\-enable\-libopus\*(C'\fR. |
|
|
1676 |
.SH "SUBTITLES DECODERS" |
|
|
1677 |
.IX Header "SUBTITLES DECODERS" |
|
|
1678 |
.Sh "dvdsub" |
|
|
1679 |
.IX Subsection "dvdsub" |
|
|
1680 |
This codec decodes the bitmap subtitles used in DVDs; the same subtitles can |
|
|
1681 |
also be found in VobSub file pairs and in some Matroska files. |
|
|
1682 |
.PP |
|
|
1683 |
\fIOptions\fR |
|
|
1684 |
.IX Subsection "Options" |
|
|
1685 |
.IP "\fBpalette\fR" 4 |
|
|
1686 |
.IX Item "palette" |
|
|
1687 |
Specify the global palette used by the bitmaps. When stored in VobSub, the |
|
|
1688 |
palette is normally specified in the index file; in Matroska, the palette is |
|
|
1689 |
stored in the codec extra-data in the same format as in VobSub. In DVDs, the |
|
|
1690 |
palette is stored in the \s-1IFO\s0 file, and therefore not available when reading |
|
|
1691 |
from dumped \s-1VOB\s0 files. |
|
|
1692 |
.Sp |
|
|
1693 |
The format for this option is a string containing 16 24\-bits hexadecimal |
|
|
1694 |
numbers (without 0x prefix) separated by comas, for example \f(CW\*(C`0d00ee, |
|
|
1695 |
ee450d, 101010, eaeaea, 0ce60b, ec14ed, ebff0b, 0d617a, 7b7b7b, d1d1d1, |
|
|
1696 |
7b2a0e, 0d950c, 0f007b, cf0dec, cfa80c, 7c127b\*(C'\fR. |
|
|
1697 |
.Sh "libzvbi-teletext" |
|
|
1698 |
.IX Subsection "libzvbi-teletext" |
|
|
1699 |
Libzvbi allows libavcodec to decode \s-1DVB\s0 teletext pages and \s-1DVB\s0 teletext |
|
|
1700 |
subtitles. Requires the presence of the libzvbi headers and library during |
|
|
1701 |
configuration. You need to explicitly configure the build with |
|
|
1702 |
\&\f(CW\*(C`\-\-enable\-libzvbi\*(C'\fR. |
|
|
1703 |
.PP |
|
|
1704 |
\fIOptions\fR |
|
|
1705 |
.IX Subsection "Options" |
|
|
1706 |
.IP "\fBtxt_page\fR" 4 |
|
|
1707 |
.IX Item "txt_page" |
|
|
1708 |
List of teletext page numbers to decode. You may use the special * string to |
|
|
1709 |
match all pages. Pages that do not match the specified list are dropped. |
|
|
1710 |
Default value is *. |
|
|
1711 |
.IP "\fBtxt_chop_top\fR" 4 |
|
|
1712 |
.IX Item "txt_chop_top" |
|
|
1713 |
Discards the top teletext line. Default value is 1. |
|
|
1714 |
.IP "\fBtxt_format\fR" 4 |
|
|
1715 |
.IX Item "txt_format" |
|
|
1716 |
Specifies the format of the decoded subtitles. The teletext decoder is capable |
|
|
1717 |
of decoding the teletext pages to bitmaps or to simple text, you should use |
|
|
1718 |
\&\*(L"bitmap\*(R" for teletext pages, because certain graphics and colors cannot be |
|
|
1719 |
expressed in simple text. You might use \*(L"text\*(R" for teletext based subtitles if |
|
|
1720 |
your application can handle simple text based subtitles. Default value is |
|
|
1721 |
bitmap. |
|
|
1722 |
.IP "\fBtxt_left\fR" 4 |
|
|
1723 |
.IX Item "txt_left" |
|
|
1724 |
X offset of generated bitmaps, default is 0. |
|
|
1725 |
.IP "\fBtxt_top\fR" 4 |
|
|
1726 |
.IX Item "txt_top" |
|
|
1727 |
Y offset of generated bitmaps, default is 0. |
|
|
1728 |
.IP "\fBtxt_chop_spaces\fR" 4 |
|
|
1729 |
.IX Item "txt_chop_spaces" |
|
|
1730 |
Chops leading and trailing spaces and removes empty lines from the generated |
|
|
1731 |
text. This option is useful for teletext based subtitles where empty spaces may |
|
|
1732 |
be present at the start or at the end of the lines or empty lines may be |
|
|
1733 |
present between the subtitle lines because of double-sized teletext charactes. |
|
|
1734 |
Default value is 1. |
|
|
1735 |
.IP "\fBtxt_duration\fR" 4 |
|
|
1736 |
.IX Item "txt_duration" |
|
|
1737 |
Sets the display duration of the decoded teletext pages or subtitles in |
|
|
1738 |
miliseconds. Default value is 30000 which is 30 seconds. |
|
|
1739 |
.IP "\fBtxt_transparent\fR" 4 |
|
|
1740 |
.IX Item "txt_transparent" |
|
|
1741 |
Force transparent background of the generated teletext bitmaps. Default value |
|
|
1742 |
is 0 which means an opaque (black) background. |
|
|
1743 |
.SH "ENCODERS" |
|
|
1744 |
.IX Header "ENCODERS" |
|
|
1745 |
Encoders are configured elements in FFmpeg which allow the encoding of |
|
|
1746 |
multimedia streams. |
|
|
1747 |
.PP |
|
|
1748 |
When you configure your FFmpeg build, all the supported native encoders |
|
|
1749 |
are enabled by default. Encoders requiring an external library must be enabled |
|
|
1750 |
manually via the corresponding \f(CW\*(C`\-\-enable\-lib\*(C'\fR option. You can list all |
|
|
1751 |
available encoders using the configure option \f(CW\*(C`\-\-list\-encoders\*(C'\fR. |
|
|
1752 |
.PP |
|
|
1753 |
You can disable all the encoders with the configure option |
|
|
1754 |
\&\f(CW\*(C`\-\-disable\-encoders\*(C'\fR and selectively enable / disable single encoders |
|
|
1755 |
with the options \f(CW\*(C`\-\-enable\-encoder=\f(CI\s-1ENCODER\s0\f(CW\*(C'\fR / |
|
|
1756 |
\&\f(CW\*(C`\-\-disable\-encoder=\f(CI\s-1ENCODER\s0\f(CW\*(C'\fR. |
|
|
1757 |
.PP |
|
|
1758 |
The option \f(CW\*(C`\-codecs\*(C'\fR of the ff* tools will display the list of |
|
|
1759 |
enabled encoders. |
|
|
1760 |
.SH "AUDIO ENCODERS" |
|
|
1761 |
.IX Header "AUDIO ENCODERS" |
|
|
1762 |
A description of some of the currently available audio encoders |
|
|
1763 |
follows. |
|
|
1764 |
.Sh "aac" |
|
|
1765 |
.IX Subsection "aac" |
|
|
1766 |
Advanced Audio Coding (\s-1AAC\s0) encoder. |
|
|
1767 |
.PP |
|
|
1768 |
This encoder is an experimental FFmpeg-native \s-1AAC\s0 encoder. Currently only the |
|
|
1769 |
low complexity (\s-1AAC\-LC\s0) profile is supported. To use this encoder, you must set |
|
|
1770 |
\&\fBstrict\fR option to \fBexperimental\fR or lower. |
|
|
1771 |
.PP |
|
|
1772 |
As this encoder is experimental, unexpected behavior may exist from time to |
|
|
1773 |
time. For a more stable \s-1AAC\s0 encoder, see libvo\-aacenc. However, be warned |
|
|
1774 |
that it has a worse quality reported by some users. |
|
|
1775 |
.PP |
|
|
1776 |
\fIOptions\fR |
|
|
1777 |
.IX Subsection "Options" |
|
|
1778 |
.IP "\fBb\fR" 4 |
|
|
1779 |
.IX Item "b" |
|
|
1780 |
Set bit rate in bits/s. Setting this automatically activates constant bit rate |
|
|
1781 |
(\s-1CBR\s0) mode. |
|
|
1782 |
.IP "\fBq\fR" 4 |
|
|
1783 |
.IX Item "q" |
|
|
1784 |
Set quality for variable bit rate (\s-1VBR\s0) mode. This option is valid only using |
|
|
1785 |
the \fBffmpeg\fR command-line tool. For library interface users, use |
|
|
1786 |
\&\fBglobal_quality\fR. |
|
|
1787 |
.IP "\fBstereo_mode\fR" 4 |
|
|
1788 |
.IX Item "stereo_mode" |
|
|
1789 |
Set stereo encoding mode. Possible values: |
|
|
1790 |
.RS 4 |
|
|
1791 |
.IP "\fBauto\fR" 4 |
|
|
1792 |
.IX Item "auto" |
|
|
1793 |
Automatically selected by the encoder. |
|
|
1794 |
.IP "\fBms_off\fR" 4 |
|
|
1795 |
.IX Item "ms_off" |
|
|
1796 |
Disable middle/side encoding. This is the default. |
|
|
1797 |
.IP "\fBms_force\fR" 4 |
|
|
1798 |
.IX Item "ms_force" |
|
|
1799 |
Force middle/side encoding. |
|
|
1800 |
.RE |
|
|
1801 |
.RS 4 |
|
|
1802 |
.RE |
|
|
1803 |
.IP "\fBaac_coder\fR" 4 |
|
|
1804 |
.IX Item "aac_coder" |
|
|
1805 |
Set \s-1AAC\s0 encoder coding method. Possible values: |
|
|
1806 |
.RS 4 |
|
|
1807 |
.IP "\fBfaac\fR" 4 |
|
|
1808 |
.IX Item "faac" |
|
|
1809 |
FAAC-inspired method. |
|
|
1810 |
.Sp |
|
|
1811 |
This method is a simplified reimplementation of the method used in \s-1FAAC\s0, which |
|
|
1812 |
sets thresholds proportional to the band energies, and then decreases all the |
|
|
1813 |
thresholds with quantizer steps to find the appropriate quantization with |
|
|
1814 |
distortion below threshold band by band. |
|
|
1815 |
.Sp |
|
|
1816 |
The quality of this method is comparable to the two loop searching method |
|
|
1817 |
descibed below, but somewhat a little better and slower. |
|
|
1818 |
.IP "\fBanmr\fR" 4 |
|
|
1819 |
.IX Item "anmr" |
|
|
1820 |
Average noise to mask ratio (\s-1ANMR\s0) trellis-based solution. |
|
|
1821 |
.Sp |
|
|
1822 |
This has a theoretic best quality out of all the coding methods, but at the |
|
|
1823 |
cost of the slowest speed. |
|
|
1824 |
.IP "\fBtwoloop\fR" 4 |
|
|
1825 |
.IX Item "twoloop" |
|
|
1826 |
Two loop searching (\s-1TLS\s0) method. |
|
|
1827 |
.Sp |
|
|
1828 |
This method first sets quantizers depending on band thresholds and then tries |
|
|
1829 |
to find an optimal combination by adding or subtracting a specific value from |
|
|
1830 |
all quantizers and adjusting some individual quantizer a little. |
|
|
1831 |
.Sp |
|
|
1832 |
This method produces similar quality with the \s-1FAAC\s0 method and is the default. |
|
|
1833 |
.IP "\fBfast\fR" 4 |
|
|
1834 |
.IX Item "fast" |
|
|
1835 |
Constant quantizer method. |
|
|
1836 |
.Sp |
|
|
1837 |
This method sets a constant quantizer for all bands. This is the fastest of all |
|
|
1838 |
the methods, yet produces the worst quality. |
|
|
1839 |
.RE |
|
|
1840 |
.RS 4 |
|
|
1841 |
.RE |
|
|
1842 |
.Sh "ac3 and ac3_fixed" |
|
|
1843 |
.IX Subsection "ac3 and ac3_fixed" |
|
|
1844 |
\&\s-1AC\-3\s0 audio encoders. |
|
|
1845 |
.PP |
|
|
1846 |
These encoders implement part of \s-1ATSC\s0 A/52:2010 and \s-1ETSI\s0 \s-1TS\s0 102 366, as well as |
|
|
1847 |
the undocumented RealAudio 3 (a.k.a. dnet). |
|
|
1848 |
.PP |
|
|
1849 |
The \fIac3\fR encoder uses floating-point math, while the \fIac3_fixed\fR |
|
|
1850 |
encoder only uses fixed-point integer math. This does not mean that one is |
|
|
1851 |
always faster, just that one or the other may be better suited to a |
|
|
1852 |
particular system. The floating-point encoder will generally produce better |
|
|
1853 |
quality audio for a given bitrate. The \fIac3_fixed\fR encoder is not the |
|
|
1854 |
default codec for any of the output formats, so it must be specified explicitly |
|
|
1855 |
using the option \f(CW\*(C`\-acodec ac3_fixed\*(C'\fR in order to use it. |
|
|
1856 |
.PP |
|
|
1857 |
\fI\s-1AC\-3\s0 Metadata\fR |
|
|
1858 |
.IX Subsection "AC-3 Metadata" |
|
|
1859 |
.PP |
|
|
1860 |
The \s-1AC\-3\s0 metadata options are used to set parameters that describe the audio, |
|
|
1861 |
but in most cases do not affect the audio encoding itself. Some of the options |
|
|
1862 |
do directly affect or influence the decoding and playback of the resulting |
|
|
1863 |
bitstream, while others are just for informational purposes. A few of the |
|
|
1864 |
options will add bits to the output stream that could otherwise be used for |
|
|
1865 |
audio data, and will thus affect the quality of the output. Those will be |
|
|
1866 |
indicated accordingly with a note in the option list below. |
|
|
1867 |
.PP |
|
|
1868 |
These parameters are described in detail in several publicly-available |
|
|
1869 |
documents. |
|
|
1870 |
.IP "*<<\fBhttp://www.atsc.org/cms/standards/a_52\-2010.pdf\fR>>" 4 |
|
|
1871 |
.IX Item "*<>" |
|
|
1872 |
.PD 0 |
|
|
1873 |
.IP "*<<\fBhttp://www.atsc.org/cms/standards/a_54a_with_corr_1.pdf\fR>>" 4 |
|
|
1874 |
.IX Item "*<>" |
|
|
1875 |
.IP "*<<\fBhttp://www.dolby.com/uploadedFiles/zz\-_Shared_Assets/English_PDFs/Professional/18_Metadata.Guide.pdf\fR>>" 4 |
|
|
1876 |
.IX Item "*<>" |
|
|
1877 |
.IP "*<<\fBhttp://www.dolby.com/uploadedFiles/zz\-_Shared_Assets/English_PDFs/Professional/46_DDEncodingGuidelines.pdf\fR>>" 4 |
|
|
1878 |
.IX Item "*<>" |
|
|
1879 |
.PD |
|
|
1880 |
.PP |
|
|
1881 |
Metadata Control Options |
|
|
1882 |
.IX Subsection "Metadata Control Options" |
|
|
1883 |
.IP "\fB\-per_frame_metadata\fR \fIboolean\fR" 4 |
|
|
1884 |
.IX Item "-per_frame_metadata boolean" |
|
|
1885 |
Allow Per-Frame Metadata. Specifies if the encoder should check for changing |
|
|
1886 |
metadata for each frame. |
|
|
1887 |
.RS 4 |
|
|
1888 |
.IP "\fB0\fR" 4 |
|
|
1889 |
.IX Item "0" |
|
|
1890 |
The metadata values set at initialization will be used for every frame in the |
|
|
1891 |
stream. (default) |
|
|
1892 |
.IP "\fB1\fR" 4 |
|
|
1893 |
.IX Item "1" |
|
|
1894 |
Metadata values can be changed before encoding each frame. |
|
|
1895 |
.RE |
|
|
1896 |
.RS 4 |
|
|
1897 |
.RE |
|
|
1898 |
.PP |
|
|
1899 |
Downmix Levels |
|
|
1900 |
.IX Subsection "Downmix Levels" |
|
|
1901 |
.IP "\fB\-center_mixlev\fR \fIlevel\fR" 4 |
|
|
1902 |
.IX Item "-center_mixlev level" |
|
|
1903 |
Center Mix Level. The amount of gain the decoder should apply to the center |
|
|
1904 |
channel when downmixing to stereo. This field will only be written to the |
|
|
1905 |
bitstream if a center channel is present. The value is specified as a scale |
|
|
1906 |
factor. There are 3 valid values: |
|
|
1907 |
.RS 4 |
|
|
1908 |
.IP "\fB0.707\fR" 4 |
|
|
1909 |
.IX Item "0.707" |
|
|
1910 |
Apply \-3dB gain |
|
|
1911 |
.IP "\fB0.595\fR" 4 |
|
|
1912 |
.IX Item "0.595" |
|
|
1913 |
Apply \-4.5dB gain (default) |
|
|
1914 |
.IP "\fB0.500\fR" 4 |
|
|
1915 |
.IX Item "0.500" |
|
|
1916 |
Apply \-6dB gain |
|
|
1917 |
.RE |
|
|
1918 |
.RS 4 |
|
|
1919 |
.RE |
|
|
1920 |
.IP "\fB\-surround_mixlev\fR \fIlevel\fR" 4 |
|
|
1921 |
.IX Item "-surround_mixlev level" |
|
|
1922 |
Surround Mix Level. The amount of gain the decoder should apply to the surround |
|
|
1923 |
channel(s) when downmixing to stereo. This field will only be written to the |
|
|
1924 |
bitstream if one or more surround channels are present. The value is specified |
|
|
1925 |
as a scale factor. There are 3 valid values: |
|
|
1926 |
.RS 4 |
|
|
1927 |
.IP "\fB0.707\fR" 4 |
|
|
1928 |
.IX Item "0.707" |
|
|
1929 |
Apply \-3dB gain |
|
|
1930 |
.IP "\fB0.500\fR" 4 |
|
|
1931 |
.IX Item "0.500" |
|
|
1932 |
Apply \-6dB gain (default) |
|
|
1933 |
.IP "\fB0.000\fR" 4 |
|
|
1934 |
.IX Item "0.000" |
|
|
1935 |
Silence Surround Channel(s) |
|
|
1936 |
.RE |
|
|
1937 |
.RS 4 |
|
|
1938 |
.RE |
|
|
1939 |
.PP |
|
|
1940 |
Audio Production Information |
|
|
1941 |
.IX Subsection "Audio Production Information" |
|
|
1942 |
.PP |
|
|
1943 |
Audio Production Information is optional information describing the mixing |
|
|
1944 |
environment. Either none or both of the fields are written to the bitstream. |
|
|
1945 |
.IP "\fB\-mixing_level\fR \fInumber\fR" 4 |
|
|
1946 |
.IX Item "-mixing_level number" |
|
|
1947 |
Mixing Level. Specifies peak sound pressure level (\s-1SPL\s0) in the production |
|
|
1948 |
environment when the mix was mastered. Valid values are 80 to 111, or \-1 for |
|
|
1949 |
unknown or not indicated. The default value is \-1, but that value cannot be |
|
|
1950 |
used if the Audio Production Information is written to the bitstream. Therefore, |
|
|
1951 |
if the \f(CW\*(C`room_type\*(C'\fR option is not the default value, the \f(CW\*(C`mixing_level\*(C'\fR |
|
|
1952 |
option must not be \-1. |
|
|
1953 |
.IP "\fB\-room_type\fR \fItype\fR" 4 |
|
|
1954 |
.IX Item "-room_type type" |
|
|
1955 |
Room Type. Describes the equalization used during the final mixing session at |
|
|
1956 |
the studio or on the dubbing stage. A large room is a dubbing stage with the |
|
|
1957 |
industry standard X\-curve equalization; a small room has flat equalization. |
|
|
1958 |
This field will not be written to the bitstream if both the \f(CW\*(C`mixing_level\*(C'\fR |
|
|
1959 |
option and the \f(CW\*(C`room_type\*(C'\fR option have the default values. |
|
|
1960 |
.RS 4 |
|
|
1961 |
.IP "\fB0\fR" 4 |
|
|
1962 |
.IX Item "0" |
|
|
1963 |
.PD 0 |
|
|
1964 |
.IP "\fBnotindicated\fR" 4 |
|
|
1965 |
.IX Item "notindicated" |
|
|
1966 |
.PD |
|
|
1967 |
Not Indicated (default) |
|
|
1968 |
.IP "\fB1\fR" 4 |
|
|
1969 |
.IX Item "1" |
|
|
1970 |
.PD 0 |
|
|
1971 |
.IP "\fBlarge\fR" 4 |
|
|
1972 |
.IX Item "large" |
|
|
1973 |
.PD |
|
|
1974 |
Large Room |
|
|
1975 |
.IP "\fB2\fR" 4 |
|
|
1976 |
.IX Item "2" |
|
|
1977 |
.PD 0 |
|
|
1978 |
.IP "\fBsmall\fR" 4 |
|
|
1979 |
.IX Item "small" |
|
|
1980 |
.PD |
|
|
1981 |
Small Room |
|
|
1982 |
.RE |
|
|
1983 |
.RS 4 |
|
|
1984 |
.RE |
|
|
1985 |
.PP |
|
|
1986 |
Other Metadata Options |
|
|
1987 |
.IX Subsection "Other Metadata Options" |
|
|
1988 |
.IP "\fB\-copyright\fR \fIboolean\fR" 4 |
|
|
1989 |
.IX Item "-copyright boolean" |
|
|
1990 |
Copyright Indicator. Specifies whether a copyright exists for this audio. |
|
|
1991 |
.RS 4 |
|
|
1992 |
.IP "\fB0\fR" 4 |
|
|
1993 |
.IX Item "0" |
|
|
1994 |
.PD 0 |
|
|
1995 |
.IP "\fBoff\fR" 4 |
|
|
1996 |
.IX Item "off" |
|
|
1997 |
.PD |
|
|
1998 |
No Copyright Exists (default) |
|
|
1999 |
.IP "\fB1\fR" 4 |
|
|
2000 |
.IX Item "1" |
|
|
2001 |
.PD 0 |
|
|
2002 |
.IP "\fBon\fR" 4 |
|
|
2003 |
.IX Item "on" |
|
|
2004 |
.PD |
|
|
2005 |
Copyright Exists |
|
|
2006 |
.RE |
|
|
2007 |
.RS 4 |
|
|
2008 |
.RE |
|
|
2009 |
.IP "\fB\-dialnorm\fR \fIvalue\fR" 4 |
|
|
2010 |
.IX Item "-dialnorm value" |
|
|
2011 |
Dialogue Normalization. Indicates how far the average dialogue level of the |
|
|
2012 |
program is below digital 100% full scale (0 dBFS). This parameter determines a |
|
|
2013 |
level shift during audio reproduction that sets the average volume of the |
|
|
2014 |
dialogue to a preset level. The goal is to match volume level between program |
|
|
2015 |
sources. A value of \-31dB will result in no volume level change, relative to |
|
|
2016 |
the source volume, during audio reproduction. Valid values are whole numbers in |
|
|
2017 |
the range \-31 to \-1, with \-31 being the default. |
|
|
2018 |
.IP "\fB\-dsur_mode\fR \fImode\fR" 4 |
|
|
2019 |
.IX Item "-dsur_mode mode" |
|
|
2020 |
Dolby Surround Mode. Specifies whether the stereo signal uses Dolby Surround |
|
|
2021 |
(Pro Logic). This field will only be written to the bitstream if the audio |
|
|
2022 |
stream is stereo. Using this option does \fB\s-1NOT\s0\fR mean the encoder will actually |
|
|
2023 |
apply Dolby Surround processing. |
|
|
2024 |
.RS 4 |
|
|
2025 |
.IP "\fB0\fR" 4 |
|
|
2026 |
.IX Item "0" |
|
|
2027 |
.PD 0 |
|
|
2028 |
.IP "\fBnotindicated\fR" 4 |
|
|
2029 |
.IX Item "notindicated" |
|
|
2030 |
.PD |
|
|
2031 |
Not Indicated (default) |
|
|
2032 |
.IP "\fB1\fR" 4 |
|
|
2033 |
.IX Item "1" |
|
|
2034 |
.PD 0 |
|
|
2035 |
.IP "\fBoff\fR" 4 |
|
|
2036 |
.IX Item "off" |
|
|
2037 |
.PD |
|
|
2038 |
Not Dolby Surround Encoded |
|
|
2039 |
.IP "\fB2\fR" 4 |
|
|
2040 |
.IX Item "2" |
|
|
2041 |
.PD 0 |
|
|
2042 |
.IP "\fBon\fR" 4 |
|
|
2043 |
.IX Item "on" |
|
|
2044 |
.PD |
|
|
2045 |
Dolby Surround Encoded |
|
|
2046 |
.RE |
|
|
2047 |
.RS 4 |
|
|
2048 |
.RE |
|
|
2049 |
.IP "\fB\-original\fR \fIboolean\fR" 4 |
|
|
2050 |
.IX Item "-original boolean" |
|
|
2051 |
Original Bit Stream Indicator. Specifies whether this audio is from the |
|
|
2052 |
original source and not a copy. |
|
|
2053 |
.RS 4 |
|
|
2054 |
.IP "\fB0\fR" 4 |
|
|
2055 |
.IX Item "0" |
|
|
2056 |
.PD 0 |
|
|
2057 |
.IP "\fBoff\fR" 4 |
|
|
2058 |
.IX Item "off" |
|
|
2059 |
.PD |
|
|
2060 |
Not Original Source |
|
|
2061 |
.IP "\fB1\fR" 4 |
|
|
2062 |
.IX Item "1" |
|
|
2063 |
.PD 0 |
|
|
2064 |
.IP "\fBon\fR" 4 |
|
|
2065 |
.IX Item "on" |
|
|
2066 |
.PD |
|
|
2067 |
Original Source (default) |
|
|
2068 |
.RE |
|
|
2069 |
.RS 4 |
|
|
2070 |
.RE |
|
|
2071 |
.PP |
|
|
2072 |
\fIExtended Bitstream Information\fR |
|
|
2073 |
.IX Subsection "Extended Bitstream Information" |
|
|
2074 |
.PP |
|
|
2075 |
The extended bitstream options are part of the Alternate Bit Stream Syntax as |
|
|
2076 |
specified in Annex D of the A/52:2010 standard. It is grouped into 2 parts. |
|
|
2077 |
If any one parameter in a group is specified, all values in that group will be |
|
|
2078 |
written to the bitstream. Default values are used for those that are written |
|
|
2079 |
but have not been specified. If the mixing levels are written, the decoder |
|
|
2080 |
will use these values instead of the ones specified in the \f(CW\*(C`center_mixlev\*(C'\fR |
|
|
2081 |
and \f(CW\*(C`surround_mixlev\*(C'\fR options if it supports the Alternate Bit Stream |
|
|
2082 |
Syntax. |
|
|
2083 |
.PP |
|
|
2084 |
Extended Bitstream Information \- Part 1 |
|
|
2085 |
.IX Subsection "Extended Bitstream Information - Part 1" |
|
|
2086 |
.IP "\fB\-dmix_mode\fR \fImode\fR" 4 |
|
|
2087 |
.IX Item "-dmix_mode mode" |
|
|
2088 |
Preferred Stereo Downmix Mode. Allows the user to select either Lt/Rt |
|
|
2089 |
(Dolby Surround) or Lo/Ro (normal stereo) as the preferred stereo downmix mode. |
|
|
2090 |
.RS 4 |
|
|
2091 |
.IP "\fB0\fR" 4 |
|
|
2092 |
.IX Item "0" |
|
|
2093 |
.PD 0 |
|
|
2094 |
.IP "\fBnotindicated\fR" 4 |
|
|
2095 |
.IX Item "notindicated" |
|
|
2096 |
.PD |
|
|
2097 |
Not Indicated (default) |
|
|
2098 |
.IP "\fB1\fR" 4 |
|
|
2099 |
.IX Item "1" |
|
|
2100 |
.PD 0 |
|
|
2101 |
.IP "\fBltrt\fR" 4 |
|
|
2102 |
.IX Item "ltrt" |
|
|
2103 |
.PD |
|
|
2104 |
Lt/Rt Downmix Preferred |
|
|
2105 |
.IP "\fB2\fR" 4 |
|
|
2106 |
.IX Item "2" |
|
|
2107 |
.PD 0 |
|
|
2108 |
.IP "\fBloro\fR" 4 |
|
|
2109 |
.IX Item "loro" |
|
|
2110 |
.PD |
|
|
2111 |
Lo/Ro Downmix Preferred |
|
|
2112 |
.RE |
|
|
2113 |
.RS 4 |
|
|
2114 |
.RE |
|
|
2115 |
.IP "\fB\-ltrt_cmixlev\fR \fIlevel\fR" 4 |
|
|
2116 |
.IX Item "-ltrt_cmixlev level" |
|
|
2117 |
Lt/Rt Center Mix Level. The amount of gain the decoder should apply to the |
|
|
2118 |
center channel when downmixing to stereo in Lt/Rt mode. |
|
|
2119 |
.RS 4 |
|
|
2120 |
.IP "\fB1.414\fR" 4 |
|
|
2121 |
.IX Item "1.414" |
|
|
2122 |
Apply +3dB gain |
|
|
2123 |
.IP "\fB1.189\fR" 4 |
|
|
2124 |
.IX Item "1.189" |
|
|
2125 |
Apply +1.5dB gain |
|
|
2126 |
.IP "\fB1.000\fR" 4 |
|
|
2127 |
.IX Item "1.000" |
|
|
2128 |
Apply 0dB gain |
|
|
2129 |
.IP "\fB0.841\fR" 4 |
|
|
2130 |
.IX Item "0.841" |
|
|
2131 |
Apply \-1.5dB gain |
|
|
2132 |
.IP "\fB0.707\fR" 4 |
|
|
2133 |
.IX Item "0.707" |
|
|
2134 |
Apply \-3.0dB gain |
|
|
2135 |
.IP "\fB0.595\fR" 4 |
|
|
2136 |
.IX Item "0.595" |
|
|
2137 |
Apply \-4.5dB gain (default) |
|
|
2138 |
.IP "\fB0.500\fR" 4 |
|
|
2139 |
.IX Item "0.500" |
|
|
2140 |
Apply \-6.0dB gain |
|
|
2141 |
.IP "\fB0.000\fR" 4 |
|
|
2142 |
.IX Item "0.000" |
|
|
2143 |
Silence Center Channel |
|
|
2144 |
.RE |
|
|
2145 |
.RS 4 |
|
|
2146 |
.RE |
|
|
2147 |
.IP "\fB\-ltrt_surmixlev\fR \fIlevel\fR" 4 |
|
|
2148 |
.IX Item "-ltrt_surmixlev level" |
|
|
2149 |
Lt/Rt Surround Mix Level. The amount of gain the decoder should apply to the |
|
|
2150 |
surround channel(s) when downmixing to stereo in Lt/Rt mode. |
|
|
2151 |
.RS 4 |
|
|
2152 |
.IP "\fB0.841\fR" 4 |
|
|
2153 |
.IX Item "0.841" |
|
|
2154 |
Apply \-1.5dB gain |
|
|
2155 |
.IP "\fB0.707\fR" 4 |
|
|
2156 |
.IX Item "0.707" |
|
|
2157 |
Apply \-3.0dB gain |
|
|
2158 |
.IP "\fB0.595\fR" 4 |
|
|
2159 |
.IX Item "0.595" |
|
|
2160 |
Apply \-4.5dB gain |
|
|
2161 |
.IP "\fB0.500\fR" 4 |
|
|
2162 |
.IX Item "0.500" |
|
|
2163 |
Apply \-6.0dB gain (default) |
|
|
2164 |
.IP "\fB0.000\fR" 4 |
|
|
2165 |
.IX Item "0.000" |
|
|
2166 |
Silence Surround Channel(s) |
|
|
2167 |
.RE |
|
|
2168 |
.RS 4 |
|
|
2169 |
.RE |
|
|
2170 |
.IP "\fB\-loro_cmixlev\fR \fIlevel\fR" 4 |
|
|
2171 |
.IX Item "-loro_cmixlev level" |
|
|
2172 |
Lo/Ro Center Mix Level. The amount of gain the decoder should apply to the |
|
|
2173 |
center channel when downmixing to stereo in Lo/Ro mode. |
|
|
2174 |
.RS 4 |
|
|
2175 |
.IP "\fB1.414\fR" 4 |
|
|
2176 |
.IX Item "1.414" |
|
|
2177 |
Apply +3dB gain |
|
|
2178 |
.IP "\fB1.189\fR" 4 |
|
|
2179 |
.IX Item "1.189" |
|
|
2180 |
Apply +1.5dB gain |
|
|
2181 |
.IP "\fB1.000\fR" 4 |
|
|
2182 |
.IX Item "1.000" |
|
|
2183 |
Apply 0dB gain |
|
|
2184 |
.IP "\fB0.841\fR" 4 |
|
|
2185 |
.IX Item "0.841" |
|
|
2186 |
Apply \-1.5dB gain |
|
|
2187 |
.IP "\fB0.707\fR" 4 |
|
|
2188 |
.IX Item "0.707" |
|
|
2189 |
Apply \-3.0dB gain |
|
|
2190 |
.IP "\fB0.595\fR" 4 |
|
|
2191 |
.IX Item "0.595" |
|
|
2192 |
Apply \-4.5dB gain (default) |
|
|
2193 |
.IP "\fB0.500\fR" 4 |
|
|
2194 |
.IX Item "0.500" |
|
|
2195 |
Apply \-6.0dB gain |
|
|
2196 |
.IP "\fB0.000\fR" 4 |
|
|
2197 |
.IX Item "0.000" |
|
|
2198 |
Silence Center Channel |
|
|
2199 |
.RE |
|
|
2200 |
.RS 4 |
|
|
2201 |
.RE |
|
|
2202 |
.IP "\fB\-loro_surmixlev\fR \fIlevel\fR" 4 |
|
|
2203 |
.IX Item "-loro_surmixlev level" |
|
|
2204 |
Lo/Ro Surround Mix Level. The amount of gain the decoder should apply to the |
|
|
2205 |
surround channel(s) when downmixing to stereo in Lo/Ro mode. |
|
|
2206 |
.RS 4 |
|
|
2207 |
.IP "\fB0.841\fR" 4 |
|
|
2208 |
.IX Item "0.841" |
|
|
2209 |
Apply \-1.5dB gain |
|
|
2210 |
.IP "\fB0.707\fR" 4 |
|
|
2211 |
.IX Item "0.707" |
|
|
2212 |
Apply \-3.0dB gain |
|
|
2213 |
.IP "\fB0.595\fR" 4 |
|
|
2214 |
.IX Item "0.595" |
|
|
2215 |
Apply \-4.5dB gain |
|
|
2216 |
.IP "\fB0.500\fR" 4 |
|
|
2217 |
.IX Item "0.500" |
|
|
2218 |
Apply \-6.0dB gain (default) |
|
|
2219 |
.IP "\fB0.000\fR" 4 |
|
|
2220 |
.IX Item "0.000" |
|
|
2221 |
Silence Surround Channel(s) |
|
|
2222 |
.RE |
|
|
2223 |
.RS 4 |
|
|
2224 |
.RE |
|
|
2225 |
.PP |
|
|
2226 |
Extended Bitstream Information \- Part 2 |
|
|
2227 |
.IX Subsection "Extended Bitstream Information - Part 2" |
|
|
2228 |
.IP "\fB\-dsurex_mode\fR \fImode\fR" 4 |
|
|
2229 |
.IX Item "-dsurex_mode mode" |
|
|
2230 |
Dolby Surround \s-1EX\s0 Mode. Indicates whether the stream uses Dolby Surround \s-1EX\s0 |
|
|
2231 |
(7.1 matrixed to 5.1). Using this option does \fB\s-1NOT\s0\fR mean the encoder will actually |
|
|
2232 |
apply Dolby Surround \s-1EX\s0 processing. |
|
|
2233 |
.RS 4 |
|
|
2234 |
.IP "\fB0\fR" 4 |
|
|
2235 |
.IX Item "0" |
|
|
2236 |
.PD 0 |
|
|
2237 |
.IP "\fBnotindicated\fR" 4 |
|
|
2238 |
.IX Item "notindicated" |
|
|
2239 |
.PD |
|
|
2240 |
Not Indicated (default) |
|
|
2241 |
.IP "\fB1\fR" 4 |
|
|
2242 |
.IX Item "1" |
|
|
2243 |
.PD 0 |
|
|
2244 |
.IP "\fBon\fR" 4 |
|
|
2245 |
.IX Item "on" |
|
|
2246 |
.PD |
|
|
2247 |
Dolby Surround \s-1EX\s0 Off |
|
|
2248 |
.IP "\fB2\fR" 4 |
|
|
2249 |
.IX Item "2" |
|
|
2250 |
.PD 0 |
|
|
2251 |
.IP "\fBoff\fR" 4 |
|
|
2252 |
.IX Item "off" |
|
|
2253 |
.PD |
|
|
2254 |
Dolby Surround \s-1EX\s0 On |
|
|
2255 |
.RE |
|
|
2256 |
.RS 4 |
|
|
2257 |
.RE |
|
|
2258 |
.IP "\fB\-dheadphone_mode\fR \fImode\fR" 4 |
|
|
2259 |
.IX Item "-dheadphone_mode mode" |
|
|
2260 |
Dolby Headphone Mode. Indicates whether the stream uses Dolby Headphone |
|
|
2261 |
encoding (multi\-channel matrixed to 2.0 for use with headphones). Using this |
|
|
2262 |
option does \fB\s-1NOT\s0\fR mean the encoder will actually apply Dolby Headphone |
|
|
2263 |
processing. |
|
|
2264 |
.RS 4 |
|
|
2265 |
.IP "\fB0\fR" 4 |
|
|
2266 |
.IX Item "0" |
|
|
2267 |
.PD 0 |
|
|
2268 |
.IP "\fBnotindicated\fR" 4 |
|
|
2269 |
.IX Item "notindicated" |
|
|
2270 |
.PD |
|
|
2271 |
Not Indicated (default) |
|
|
2272 |
.IP "\fB1\fR" 4 |
|
|
2273 |
.IX Item "1" |
|
|
2274 |
.PD 0 |
|
|
2275 |
.IP "\fBon\fR" 4 |
|
|
2276 |
.IX Item "on" |
|
|
2277 |
.PD |
|
|
2278 |
Dolby Headphone Off |
|
|
2279 |
.IP "\fB2\fR" 4 |
|
|
2280 |
.IX Item "2" |
|
|
2281 |
.PD 0 |
|
|
2282 |
.IP "\fBoff\fR" 4 |
|
|
2283 |
.IX Item "off" |
|
|
2284 |
.PD |
|
|
2285 |
Dolby Headphone On |
|
|
2286 |
.RE |
|
|
2287 |
.RS 4 |
|
|
2288 |
.RE |
|
|
2289 |
.IP "\fB\-ad_conv_type\fR \fItype\fR" 4 |
|
|
2290 |
.IX Item "-ad_conv_type type" |
|
|
2291 |
A/D Converter Type. Indicates whether the audio has passed through \s-1HDCD\s0 A/D |
|
|
2292 |
conversion. |
|
|
2293 |
.RS 4 |
|
|
2294 |
.IP "\fB0\fR" 4 |
|
|
2295 |
.IX Item "0" |
|
|
2296 |
.PD 0 |
|
|
2297 |
.IP "\fBstandard\fR" 4 |
|
|
2298 |
.IX Item "standard" |
|
|
2299 |
.PD |
|
|
2300 |
Standard A/D Converter (default) |
|
|
2301 |
.IP "\fB1\fR" 4 |
|
|
2302 |
.IX Item "1" |
|
|
2303 |
.PD 0 |
|
|
2304 |
.IP "\fBhdcd\fR" 4 |
|
|
2305 |
.IX Item "hdcd" |
|
|
2306 |
.PD |
|
|
2307 |
\&\s-1HDCD\s0 A/D Converter |
|
|
2308 |
.RE |
|
|
2309 |
.RS 4 |
|
|
2310 |
.RE |
|
|
2311 |
.PP |
|
|
2312 |
\fIOther \s-1AC\-3\s0 Encoding Options\fR |
|
|
2313 |
.IX Subsection "Other AC-3 Encoding Options" |
|
|
2314 |
.IP "\fB\-stereo_rematrixing\fR \fIboolean\fR" 4 |
|
|
2315 |
.IX Item "-stereo_rematrixing boolean" |
|
|
2316 |
Stereo Rematrixing. Enables/Disables use of rematrixing for stereo input. This |
|
|
2317 |
is an optional \s-1AC\-3\s0 feature that increases quality by selectively encoding |
|
|
2318 |
the left/right channels as mid/side. This option is enabled by default, and it |
|
|
2319 |
is highly recommended that it be left as enabled except for testing purposes. |
|
|
2320 |
.PP |
|
|
2321 |
\fIFloating-Point-Only \s-1AC\-3\s0 Encoding Options\fR |
|
|
2322 |
.IX Subsection "Floating-Point-Only AC-3 Encoding Options" |
|
|
2323 |
.PP |
|
|
2324 |
These options are only valid for the floating-point encoder and do not exist |
|
|
2325 |
for the fixed-point encoder due to the corresponding features not being |
|
|
2326 |
implemented in fixed\-point. |
|
|
2327 |
.IP "\fB\-channel_coupling\fR \fIboolean\fR" 4 |
|
|
2328 |
.IX Item "-channel_coupling boolean" |
|
|
2329 |
Enables/Disables use of channel coupling, which is an optional \s-1AC\-3\s0 feature |
|
|
2330 |
that increases quality by combining high frequency information from multiple |
|
|
2331 |
channels into a single channel. The per-channel high frequency information is |
|
|
2332 |
sent with less accuracy in both the frequency and time domains. This allows |
|
|
2333 |
more bits to be used for lower frequencies while preserving enough information |
|
|
2334 |
to reconstruct the high frequencies. This option is enabled by default for the |
|
|
2335 |
floating-point encoder and should generally be left as enabled except for |
|
|
2336 |
testing purposes or to increase encoding speed. |
|
|
2337 |
.RS 4 |
|
|
2338 |
.IP "\fB\-1\fR" 4 |
|
|
2339 |
.IX Item "-1" |
|
|
2340 |
.PD 0 |
|
|
2341 |
.IP "\fBauto\fR" 4 |
|
|
2342 |
.IX Item "auto" |
|
|
2343 |
.PD |
|
|
2344 |
Selected by Encoder (default) |
|
|
2345 |
.IP "\fB0\fR" 4 |
|
|
2346 |
.IX Item "0" |
|
|
2347 |
.PD 0 |
|
|
2348 |
.IP "\fBoff\fR" 4 |
|
|
2349 |
.IX Item "off" |
|
|
2350 |
.PD |
|
|
2351 |
Disable Channel Coupling |
|
|
2352 |
.IP "\fB1\fR" 4 |
|
|
2353 |
.IX Item "1" |
|
|
2354 |
.PD 0 |
|
|
2355 |
.IP "\fBon\fR" 4 |
|
|
2356 |
.IX Item "on" |
|
|
2357 |
.PD |
|
|
2358 |
Enable Channel Coupling |
|
|
2359 |
.RE |
|
|
2360 |
.RS 4 |
|
|
2361 |
.RE |
|
|
2362 |
.IP "\fB\-cpl_start_band\fR \fInumber\fR" 4 |
|
|
2363 |
.IX Item "-cpl_start_band number" |
|
|
2364 |
Coupling Start Band. Sets the channel coupling start band, from 1 to 15. If a |
|
|
2365 |
value higher than the bandwidth is used, it will be reduced to 1 less than the |
|
|
2366 |
coupling end band. If \fIauto\fR is used, the start band will be determined by |
|
|
2367 |
the encoder based on the bit rate, sample rate, and channel layout. This option |
|
|
2368 |
has no effect if channel coupling is disabled. |
|
|
2369 |
.RS 4 |
|
|
2370 |
.IP "\fB\-1\fR" 4 |
|
|
2371 |
.IX Item "-1" |
|
|
2372 |
.PD 0 |
|
|
2373 |
.IP "\fBauto\fR" 4 |
|
|
2374 |
.IX Item "auto" |
|
|
2375 |
.PD |
|
|
2376 |
Selected by Encoder (default) |
|
|
2377 |
.RE |
|
|
2378 |
.RS 4 |
|
|
2379 |
.RE |
|
|
2380 |
.Sh "libmp3lame" |
|
|
2381 |
.IX Subsection "libmp3lame" |
|
|
2382 |
\&\s-1LAME\s0 (Lame Ain't an \s-1MP3\s0 Encoder) \s-1MP3\s0 encoder wrapper. |
|
|
2383 |
.PP |
|
|
2384 |
Requires the presence of the libmp3lame headers and library during |
|
|
2385 |
configuration. You need to explicitly configure the build with |
|
|
2386 |
\&\f(CW\*(C`\-\-enable\-libmp3lame\*(C'\fR. |
|
|
2387 |
.PP |
|
|
2388 |
See libshine for a fixed-point \s-1MP3\s0 encoder, although with a |
|
|
2389 |
lower quality. |
|
|
2390 |
.PP |
|
|
2391 |
\fIOptions\fR |
|
|
2392 |
.IX Subsection "Options" |
|
|
2393 |
.PP |
|
|
2394 |
The following options are supported by the libmp3lame wrapper. The |
|
|
2395 |
\&\fBlame\fR\-equivalent of the options are listed in parentheses. |
|
|
2396 |
.IP "\fBb (\fR\fI\-b\fR\fB)\fR" 4 |
|
|
2397 |
.IX Item "b (-b)" |
|
|
2398 |
Set bitrate expressed in bits/s for \s-1CBR\s0. \s-1LAME\s0 \f(CW\*(C`bitrate\*(C'\fR is |
|
|
2399 |
expressed in kilobits/s. |
|
|
2400 |
.IP "\fBq (\fR\fI\-V\fR\fB)\fR" 4 |
|
|
2401 |
.IX Item "q (-V)" |
|
|
2402 |
Set constant quality setting for \s-1VBR\s0. This option is valid only |
|
|
2403 |
using the \fBffmpeg\fR command-line tool. For library interface |
|
|
2404 |
users, use \fBglobal_quality\fR. |
|
|
2405 |
.IP "\fBcompression_level (\fR\fI\-q\fR\fB)\fR" 4 |
|
|
2406 |
.IX Item "compression_level (-q)" |
|
|
2407 |
Set algorithm quality. Valid arguments are integers in the 0\-9 range, |
|
|
2408 |
with 0 meaning highest quality but slowest, and 9 meaning fastest |
|
|
2409 |
while producing the worst quality. |
|
|
2410 |
.IP "\fBreservoir\fR" 4 |
|
|
2411 |
.IX Item "reservoir" |
|
|
2412 |
Enable use of bit reservoir when set to 1. Default value is 1. \s-1LAME\s0 |
|
|
2413 |
has this enabled by default, but can be overriden by use |
|
|
2414 |
\&\fB\-\-nores\fR option. |
|
|
2415 |
.IP "\fBjoint_stereo (\fR\fI\-m j\fR\fB)\fR" 4 |
|
|
2416 |
.IX Item "joint_stereo (-m j)" |
|
|
2417 |
Enable the encoder to use (on a frame by frame basis) either L/R |
|
|
2418 |
stereo or mid/side stereo. Default value is 1. |
|
|
2419 |
.Sh "libopencore-amrnb" |
|
|
2420 |
.IX Subsection "libopencore-amrnb" |
|
|
2421 |
OpenCORE Adaptive Multi-Rate Narrowband encoder. |
|
|
2422 |
.PP |
|
|
2423 |
Requires the presence of the libopencore-amrnb headers and library during |
|
|
2424 |
configuration. You need to explicitly configure the build with |
|
|
2425 |
\&\f(CW\*(C`\-\-enable\-libopencore\-amrnb \-\-enable\-version3\*(C'\fR. |
|
|
2426 |
.PP |
|
|
2427 |
This is a mono-only encoder. Officially it only supports 8000Hz sample rate, |
|
|
2428 |
but you can override it by setting \fBstrict\fR to \fBunofficial\fR or |
|
|
2429 |
lower. |
|
|
2430 |
.PP |
|
|
2431 |
\fIOptions\fR |
|
|
2432 |
.IX Subsection "Options" |
|
|
2433 |
.IP "\fBb\fR" 4 |
|
|
2434 |
.IX Item "b" |
|
|
2435 |
Set bitrate in bits per second. Only the following bitrates are supported, |
|
|
2436 |
otherwise libavcodec will round to the nearest valid bitrate. |
|
|
2437 |
.RS 4 |
|
|
2438 |
.IP "\fB4750\fR" 4 |
|
|
2439 |
.IX Item "4750" |
|
|
2440 |
.PD 0 |
|
|
2441 |
.IP "\fB5150\fR" 4 |
|
|
2442 |
.IX Item "5150" |
|
|
2443 |
.IP "\fB5900\fR" 4 |
|
|
2444 |
.IX Item "5900" |
|
|
2445 |
.IP "\fB6700\fR" 4 |
|
|
2446 |
.IX Item "6700" |
|
|
2447 |
.IP "\fB7400\fR" 4 |
|
|
2448 |
.IX Item "7400" |
|
|
2449 |
.IP "\fB7950\fR" 4 |
|
|
2450 |
.IX Item "7950" |
|
|
2451 |
.IP "\fB10200\fR" 4 |
|
|
2452 |
.IX Item "10200" |
|
|
2453 |
.IP "\fB12200\fR" 4 |
|
|
2454 |
.IX Item "12200" |
|
|
2455 |
.RE |
|
|
2456 |
.RS 4 |
|
|
2457 |
.RE |
|
|
2458 |
.IP "\fBdtx\fR" 4 |
|
|
2459 |
.IX Item "dtx" |
|
|
2460 |
.PD |
|
|
2461 |
Allow discontinuous transmission (generate comfort noise) when set to 1. The |
|
|
2462 |
default value is 0 (disabled). |
|
|
2463 |
.Sh "libshine" |
|
|
2464 |
.IX Subsection "libshine" |
|
|
2465 |
Shine Fixed-Point \s-1MP3\s0 encoder wrapper. |
|
|
2466 |
.PP |
|
|
2467 |
Shine is a fixed-point \s-1MP3\s0 encoder. It has a far better performance on |
|
|
2468 |
platforms without an \s-1FPU\s0, e.g. armel CPUs, and some phones and tablets. |
|
|
2469 |
However, as it is more targeted on performance than quality, it is not on par |
|
|
2470 |
with \s-1LAME\s0 and other production-grade encoders quality\-wise. Also, according to |
|
|
2471 |
the project's homepage, this encoder may not be free of bugs as the code was |
|
|
2472 |
written a long time ago and the project was dead for at least 5 years. |
|
|
2473 |
.PP |
|
|
2474 |
This encoder only supports stereo and mono input. This is also CBR\-only. |
|
|
2475 |
.PP |
|
|
2476 |
The original project (last updated in early 2007) is at |
|
|
2477 |
<\fBhttp://sourceforge.net/projects/libshine\-fxp/\fR>. We only support the |
|
|
2478 |
updated fork by the Savonet/Liquidsoap project at <\fBhttps://github.com/savonet/shine\fR>. |
|
|
2479 |
.PP |
|
|
2480 |
Requires the presence of the libshine headers and library during |
|
|
2481 |
configuration. You need to explicitly configure the build with |
|
|
2482 |
\&\f(CW\*(C`\-\-enable\-libshine\*(C'\fR. |
|
|
2483 |
.PP |
|
|
2484 |
See also libmp3lame. |
|
|
2485 |
.PP |
|
|
2486 |
\fIOptions\fR |
|
|
2487 |
.IX Subsection "Options" |
|
|
2488 |
.PP |
|
|
2489 |
The following options are supported by the libshine wrapper. The |
|
|
2490 |
\&\fBshineenc\fR\-equivalent of the options are listed in parentheses. |
|
|
2491 |
.IP "\fBb (\fR\fI\-b\fR\fB)\fR" 4 |
|
|
2492 |
.IX Item "b (-b)" |
|
|
2493 |
Set bitrate expressed in bits/s for \s-1CBR\s0. \fBshineenc\fR \fB\-b\fR option |
|
|
2494 |
is expressed in kilobits/s. |
|
|
2495 |
.Sh "libtwolame" |
|
|
2496 |
.IX Subsection "libtwolame" |
|
|
2497 |
TwoLAME \s-1MP2\s0 encoder wrapper. |
|
|
2498 |
.PP |
|
|
2499 |
Requires the presence of the libtwolame headers and library during |
|
|
2500 |
configuration. You need to explicitly configure the build with |
|
|
2501 |
\&\f(CW\*(C`\-\-enable\-libtwolame\*(C'\fR. |
|
|
2502 |
.PP |
|
|
2503 |
\fIOptions\fR |
|
|
2504 |
.IX Subsection "Options" |
|
|
2505 |
.PP |
|
|
2506 |
The following options are supported by the libtwolame wrapper. The |
|
|
2507 |
\&\fBtwolame\fR\-equivalent options follow the FFmpeg ones and are in |
|
|
2508 |
parentheses. |
|
|
2509 |
.IP "\fBb (\fR\fI\-b\fR\fB)\fR" 4 |
|
|
2510 |
.IX Item "b (-b)" |
|
|
2511 |
Set bitrate expressed in bits/s for \s-1CBR\s0. \fBtwolame\fR \fBb\fR |
|
|
2512 |
option is expressed in kilobits/s. Default value is 128k. |
|
|
2513 |
.IP "\fBq (\fR\fI\-V\fR\fB)\fR" 4 |
|
|
2514 |
.IX Item "q (-V)" |
|
|
2515 |
Set quality for experimental \s-1VBR\s0 support. Maximum value range is |
|
|
2516 |
from \-50 to 50, useful range is from \-10 to 10. The higher the |
|
|
2517 |
value, the better the quality. This option is valid only using the |
|
|
2518 |
\&\fBffmpeg\fR command-line tool. For library interface users, |
|
|
2519 |
use \fBglobal_quality\fR. |
|
|
2520 |
.IP "\fBmode (\fR\fI\-\-mode\fR\fB)\fR" 4 |
|
|
2521 |
.IX Item "mode (--mode)" |
|
|
2522 |
Set the mode of the resulting audio. Possible values: |
|
|
2523 |
.RS 4 |
|
|
2524 |
.IP "\fBauto\fR" 4 |
|
|
2525 |
.IX Item "auto" |
|
|
2526 |
Choose mode automatically based on the input. This is the default. |
|
|
2527 |
.IP "\fBstereo\fR" 4 |
|
|
2528 |
.IX Item "stereo" |
|
|
2529 |
Stereo |
|
|
2530 |
.IP "\fBjoint_stereo\fR" 4 |
|
|
2531 |
.IX Item "joint_stereo" |
|
|
2532 |
Joint stereo |
|
|
2533 |
.IP "\fBdual_channel\fR" 4 |
|
|
2534 |
.IX Item "dual_channel" |
|
|
2535 |
Dual channel |
|
|
2536 |
.IP "\fBmono\fR" 4 |
|
|
2537 |
.IX Item "mono" |
|
|
2538 |
Mono |
|
|
2539 |
.RE |
|
|
2540 |
.RS 4 |
|
|
2541 |
.RE |
|
|
2542 |
.IP "\fBpsymodel (\fR\fI\-\-psyc\-mode\fR\fB)\fR" 4 |
|
|
2543 |
.IX Item "psymodel (--psyc-mode)" |
|
|
2544 |
Set psychoacoustic model to use in encoding. The argument must be |
|
|
2545 |
an integer between \-1 and 4, inclusive. The higher the value, the |
|
|
2546 |
better the quality. The default value is 3. |
|
|
2547 |
.IP "\fBenergy_levels (\fR\fI\-\-energy\fR\fB)\fR" 4 |
|
|
2548 |
.IX Item "energy_levels (--energy)" |
|
|
2549 |
Enable energy levels extensions when set to 1. The default value is |
|
|
2550 |
|
|
|
2551 |
.IP "\fBerror_protection (\fR\fI\-\-protect\fR\fB)\fR" 4 |
|
|
2552 |
.IX Item "error_protection (--protect)" |
|
|
2553 |
Enable \s-1CRC\s0 error protection when set to 1. The default value is 0 |
|
|
2554 |
(disabled). |
|
|
2555 |
.IP "\fBcopyright (\fR\fI\-\-copyright\fR\fB)\fR" 4 |
|
|
2556 |
.IX Item "copyright (--copyright)" |
|
|
2557 |
Set \s-1MPEG\s0 audio copyright flag when set to 1. The default value is 0 |
|
|
2558 |
(disabled). |
|
|
2559 |
.IP "\fBoriginal (\fR\fI\-\-original\fR\fB)\fR" 4 |
|
|
2560 |
.IX Item "original (--original)" |
|
|
2561 |
Set \s-1MPEG\s0 audio original flag when set to 1. The default value is 0 |
|
|
2562 |
(disabled). |
|
|
2563 |
.Sh "libvo-aacenc" |
|
|
2564 |
.IX Subsection "libvo-aacenc" |
|
|
2565 |
VisualOn \s-1AAC\s0 encoder. |
|
|
2566 |
.PP |
|
|
2567 |
Requires the presence of the libvo-aacenc headers and library during |
|
|
2568 |
configuration. You need to explicitly configure the build with |
|
|
2569 |
\&\f(CW\*(C`\-\-enable\-libvo\-aacenc \-\-enable\-version3\*(C'\fR. |
|
|
2570 |
.PP |
|
|
2571 |
This encoder is considered to be worse than the |
|
|
2572 |
native experimental FFmpeg \s-1AAC\s0 encoder, according to |
|
|
2573 |
multiple sources. |
|
|
2574 |
.PP |
|
|
2575 |
\fIOptions\fR |
|
|
2576 |
.IX Subsection "Options" |
|
|
2577 |
.PP |
|
|
2578 |
The VisualOn \s-1AAC\s0 encoder only support encoding AAC-LC and up to 2 |
|
|
2579 |
channels. It is also CBR\-only. |
|
|
2580 |
.IP "\fBb\fR" 4 |
|
|
2581 |
.IX Item "b" |
|
|
2582 |
Set bit rate in bits/s. |
|
|
2583 |
.Sh "libvo-amrwbenc" |
|
|
2584 |
.IX Subsection "libvo-amrwbenc" |
|
|
2585 |
VisualOn Adaptive Multi-Rate Wideband encoder. |
|
|
2586 |
.PP |
|
|
2587 |
Requires the presence of the libvo-amrwbenc headers and library during |
|
|
2588 |
configuration. You need to explicitly configure the build with |
|
|
2589 |
\&\f(CW\*(C`\-\-enable\-libvo\-amrwbenc \-\-enable\-version3\*(C'\fR. |
|
|
2590 |
.PP |
|
|
2591 |
This is a mono-only encoder. Officially it only supports 16000Hz sample |
|
|
2592 |
rate, but you can override it by setting \fBstrict\fR to |
|
|
2593 |
\&\fBunofficial\fR or lower. |
|
|
2594 |
.PP |
|
|
2595 |
\fIOptions\fR |
|
|
2596 |
.IX Subsection "Options" |
|
|
2597 |
.IP "\fBb\fR" 4 |
|
|
2598 |
.IX Item "b" |
|
|
2599 |
Set bitrate in bits/s. Only the following bitrates are supported, otherwise |
|
|
2600 |
libavcodec will round to the nearest valid bitrate. |
|
|
2601 |
.RS 4 |
|
|
2602 |
.IP "\fB6600\fR" 4 |
|
|
2603 |
.IX Item "6600" |
|
|
2604 |
.PD 0 |
|
|
2605 |
.IP "\fB8850\fR" 4 |
|
|
2606 |
.IX Item "8850" |
|
|
2607 |
.IP "\fB12650\fR" 4 |
|
|
2608 |
.IX Item "12650" |
|
|
2609 |
.IP "\fB14250\fR" 4 |
|
|
2610 |
.IX Item "14250" |
|
|
2611 |
.IP "\fB15850\fR" 4 |
|
|
2612 |
.IX Item "15850" |
|
|
2613 |
.IP "\fB18250\fR" 4 |
|
|
2614 |
.IX Item "18250" |
|
|
2615 |
.IP "\fB19850\fR" 4 |
|
|
2616 |
.IX Item "19850" |
|
|
2617 |
.IP "\fB23050\fR" 4 |
|
|
2618 |
.IX Item "23050" |
|
|
2619 |
.IP "\fB23850\fR" 4 |
|
|
2620 |
.IX Item "23850" |
|
|
2621 |
.RE |
|
|
2622 |
.RS 4 |
|
|
2623 |
.RE |
|
|
2624 |
.IP "\fBdtx\fR" 4 |
|
|
2625 |
.IX Item "dtx" |
|
|
2626 |
.PD |
|
|
2627 |
Allow discontinuous transmission (generate comfort noise) when set to 1. The |
|
|
2628 |
default value is 0 (disabled). |
|
|
2629 |
.Sh "libopus" |
|
|
2630 |
.IX Subsection "libopus" |
|
|
2631 |
libopus Opus Interactive Audio Codec encoder wrapper. |
|
|
2632 |
.PP |
|
|
2633 |
Requires the presence of the libopus headers and library during |
|
|
2634 |
configuration. You need to explicitly configure the build with |
|
|
2635 |
\&\f(CW\*(C`\-\-enable\-libopus\*(C'\fR. |
|
|
2636 |
.PP |
|
|
2637 |
\fIOption Mapping\fR |
|
|
2638 |
.IX Subsection "Option Mapping" |
|
|
2639 |
.PP |
|
|
2640 |
Most libopus options are modeled after the \fBopusenc\fR utility from |
|
|
2641 |
opus\-tools. The following is an option mapping chart describing options |
|
|
2642 |
supported by the libopus wrapper, and their \fBopusenc\fR\-equivalent |
|
|
2643 |
in parentheses. |
|
|
2644 |
.IP "\fBb (\fR\fIbitrate\fR\fB)\fR" 4 |
|
|
2645 |
.IX Item "b (bitrate)" |
|
|
2646 |
Set the bit rate in bits/s. FFmpeg's \fBb\fR option is |
|
|
2647 |
expressed in bits/s, while \fBopusenc\fR's \fBbitrate\fR in |
|
|
2648 |
kilobits/s. |
|
|
2649 |
.IP "\fBvbr (\fR\fIvbr\fR\fB,\fR \fIhard-cbr\fR\fB, and\fR \fIcvbr\fR\fB)\fR" 4 |
|
|
2650 |
.IX Item "vbr (vbr, hard-cbr, and cvbr)" |
|
|
2651 |
Set \s-1VBR\s0 mode. The FFmpeg \fBvbr\fR option has the following |
|
|
2652 |
valid arguments, with the their \fBopusenc\fR equivalent options |
|
|
2653 |
in parentheses: |
|
|
2654 |
.RS 4 |
|
|
2655 |
.IP "\fBoff (\fR\fIhard-cbr\fR\fB)\fR" 4 |
|
|
2656 |
.IX Item "off (hard-cbr)" |
|
|
2657 |
Use constant bit rate encoding. |
|
|
2658 |
.IP "\fBon (\fR\fIvbr\fR\fB)\fR" 4 |
|
|
2659 |
.IX Item "on (vbr)" |
|
|
2660 |
Use variable bit rate encoding (the default). |
|
|
2661 |
.IP "\fBconstrained (\fR\fIcvbr\fR\fB)\fR" 4 |
|
|
2662 |
.IX Item "constrained (cvbr)" |
|
|
2663 |
Use constrained variable bit rate encoding. |
|
|
2664 |
.RE |
|
|
2665 |
.RS 4 |
|
|
2666 |
.RE |
|
|
2667 |
.IP "\fBcompression_level (\fR\fIcomp\fR\fB)\fR" 4 |
|
|
2668 |
.IX Item "compression_level (comp)" |
|
|
2669 |
Set encoding algorithm complexity. Valid options are integers in |
|
|
2670 |
the 0\-10 range. 0 gives the fastest encodes but lower quality, while 10 |
|
|
2671 |
gives the highest quality but slowest encoding. The default is 10. |
|
|
2672 |
.IP "\fBframe_duration (\fR\fIframesize\fR\fB)\fR" 4 |
|
|
2673 |
.IX Item "frame_duration (framesize)" |
|
|
2674 |
Set maximum frame size, or duration of a frame in milliseconds. The |
|
|
2675 |
argument must be exactly the following: 2.5, 5, 10, 20, 40, 60. Smaller |
|
|
2676 |
frame sizes achieve lower latency but less quality at a given bitrate. |
|
|
2677 |
Sizes greater than 20ms are only interesting at fairly low bitrates. |
|
|
2678 |
The default of FFmpeg is 10ms, but is 20ms in \fBopusenc\fR. |
|
|
2679 |
.IP "\fBpacket_loss (\fR\fIexpect-loss\fR\fB)\fR" 4 |
|
|
2680 |
.IX Item "packet_loss (expect-loss)" |
|
|
2681 |
Set expected packet loss percentage. The default is 0. |
|
|
2682 |
.IP "\fBapplication (N.A.)\fR" 4 |
|
|
2683 |
.IX Item "application (N.A.)" |
|
|
2684 |
Set intended application type. Valid options are listed below: |
|
|
2685 |
.RS 4 |
|
|
2686 |
.IP "\fBvoip\fR" 4 |
|
|
2687 |
.IX Item "voip" |
|
|
2688 |
Favor improved speech intelligibility. |
|
|
2689 |
.IP "\fBaudio\fR" 4 |
|
|
2690 |
.IX Item "audio" |
|
|
2691 |
Favor faithfulness to the input (the default). |
|
|
2692 |
.IP "\fBlowdelay\fR" 4 |
|
|
2693 |
.IX Item "lowdelay" |
|
|
2694 |
Restrict to only the lowest delay modes. |
|
|
2695 |
.RE |
|
|
2696 |
.RS 4 |
|
|
2697 |
.RE |
|
|
2698 |
.IP "\fBcutoff (N.A.)\fR" 4 |
|
|
2699 |
.IX Item "cutoff (N.A.)" |
|
|
2700 |
Set cutoff bandwidth in Hz. The argument must be exactly one of the |
|
|
2701 |
following: 4000, 6000, 8000, 12000, or 20000, corresponding to |
|
|
2702 |
narrowband, mediumband, wideband, super wideband, and fullband |
|
|
2703 |
respectively. The default is 0 (cutoff disabled). |
|
|
2704 |
.Sh "libvorbis" |
|
|
2705 |
.IX Subsection "libvorbis" |
|
|
2706 |
libvorbis encoder wrapper. |
|
|
2707 |
.PP |
|
|
2708 |
Requires the presence of the libvorbisenc headers and library during |
|
|
2709 |
configuration. You need to explicitly configure the build with |
|
|
2710 |
\&\f(CW\*(C`\-\-enable\-libvorbis\*(C'\fR. |
|
|
2711 |
.PP |
|
|
2712 |
\fIOptions\fR |
|
|
2713 |
.IX Subsection "Options" |
|
|
2714 |
.PP |
|
|
2715 |
The following options are supported by the libvorbis wrapper. The |
|
|
2716 |
\&\fBoggenc\fR\-equivalent of the options are listed in parentheses. |
|
|
2717 |
.PP |
|
|
2718 |
To get a more accurate and extensive documentation of the libvorbis |
|
|
2719 |
options, consult the libvorbisenc's and \fBoggenc\fR's documentations. |
|
|
2720 |
See <\fBhttp://xiph.org/vorbis/\fR>, |
|
|
2721 |
<\fBhttp://wiki.xiph.org/Vorbis\-tools\fR>, and \fIoggenc\fR\|(1). |
|
|
2722 |
.IP "\fBb (\fR\fI\-b\fR\fB)\fR" 4 |
|
|
2723 |
.IX Item "b (-b)" |
|
|
2724 |
Set bitrate expressed in bits/s for \s-1ABR\s0. \fBoggenc\fR \fB\-b\fR is |
|
|
2725 |
expressed in kilobits/s. |
|
|
2726 |
.IP "\fBq (\fR\fI\-q\fR\fB)\fR" 4 |
|
|
2727 |
.IX Item "q (-q)" |
|
|
2728 |
Set constant quality setting for \s-1VBR\s0. The value should be a float |
|
|
2729 |
number in the range of \-1.0 to 10.0. The higher the value, the better |
|
|
2730 |
the quality. The default value is \fB3.0\fR. |
|
|
2731 |
.Sp |
|
|
2732 |
This option is valid only using the \fBffmpeg\fR command-line tool. |
|
|
2733 |
For library interface users, use \fBglobal_quality\fR. |
|
|
2734 |
.IP "\fBcutoff (\fR\fI\-\-advanced\-encode\-option lowpass_frequency=N\fR\fB)\fR" 4 |
|
|
2735 |
.IX Item "cutoff (--advanced-encode-option lowpass_frequency=N)" |
|
|
2736 |
Set cutoff bandwidth in Hz, a value of 0 disables cutoff. \fBoggenc\fR's |
|
|
2737 |
related option is expressed in kHz. The default value is \fB0\fR (cutoff |
|
|
2738 |
disabled). |
|
|
2739 |
.IP "\fBminrate (\fR\fI\-m\fR\fB)\fR" 4 |
|
|
2740 |
.IX Item "minrate (-m)" |
|
|
2741 |
Set minimum bitrate expressed in bits/s. \fBoggenc\fR \fB\-m\fR is |
|
|
2742 |
expressed in kilobits/s. |
|
|
2743 |
.IP "\fBmaxrate (\fR\fI\-M\fR\fB)\fR" 4 |
|
|
2744 |
.IX Item "maxrate (-M)" |
|
|
2745 |
Set maximum bitrate expressed in bits/s. \fBoggenc\fR \fB\-M\fR is |
|
|
2746 |
expressed in kilobits/s. This only has effect on \s-1ABR\s0 mode. |
|
|
2747 |
.IP "\fBiblock (\fR\fI\-\-advanced\-encode\-option impulse_noisetune=N\fR\fB)\fR" 4 |
|
|
2748 |
.IX Item "iblock (--advanced-encode-option impulse_noisetune=N)" |
|
|
2749 |
Set noise floor bias for impulse blocks. The value is a float number from |
|
|
2750 |
\&\-15.0 to 0.0. A negative bias instructs the encoder to pay special attention |
|
|
2751 |
to the crispness of transients in the encoded audio. The tradeoff for better |
|
|
2752 |
transient response is a higher bitrate. |
|
|
2753 |
.Sh "libwavpack" |
|
|
2754 |
.IX Subsection "libwavpack" |
|
|
2755 |
A wrapper providing WavPack encoding through libwavpack. |
|
|
2756 |
.PP |
|
|
2757 |
Only lossless mode using 32\-bit integer samples is supported currently. |
|
|
2758 |
The \fBcompression_level\fR option can be used to control speed vs. |
|
|
2759 |
compression tradeoff, with the values mapped to libwavpack as follows: |
|
|
2760 |
.IP "\fB0\fR" 4 |
|
|
2761 |
.IX Item "0" |
|
|
2762 |
Fast mode \- corresponding to the wavpack \fB\-f\fR option. |
|
|
2763 |
.IP "\fB1\fR" 4 |
|
|
2764 |
.IX Item "1" |
|
|
2765 |
Normal (default) settings. |
|
|
2766 |
.IP "\fB2\fR" 4 |
|
|
2767 |
.IX Item "2" |
|
|
2768 |
High quality \- corresponding to the wavpack \fB\-h\fR option. |
|
|
2769 |
.IP "\fB3\fR" 4 |
|
|
2770 |
.IX Item "3" |
|
|
2771 |
Very high quality \- corresponding to the wavpack \fB\-hh\fR option. |
|
|
2772 |
.IP "\fB4\-8\fR" 4 |
|
|
2773 |
.IX Item "4-8" |
|
|
2774 |
Same as 3, but with extra processing enabled \- corresponding to the wavpack |
|
|
2775 |
\&\fB\-x\fR option. I.e. 4 is the same as \fB\-x2\fR and 8 is the same as |
|
|
2776 |
\&\fB\-x6\fR. |
|
|
2777 |
.SH "VIDEO ENCODERS" |
|
|
2778 |
.IX Header "VIDEO ENCODERS" |
|
|
2779 |
A description of some of the currently available video encoders |
|
|
2780 |
follows. |
|
|
2781 |
.Sh "libtheora" |
|
|
2782 |
.IX Subsection "libtheora" |
|
|
2783 |
Theora format supported through libtheora. |
|
|
2784 |
.PP |
|
|
2785 |
Requires the presence of the libtheora headers and library during |
|
|
2786 |
configuration. You need to explicitly configure the build with |
|
|
2787 |
\&\f(CW\*(C`\-\-enable\-libtheora\*(C'\fR. |
|
|
2788 |
.PP |
|
|
2789 |
\fIOptions\fR |
|
|
2790 |
.IX Subsection "Options" |
|
|
2791 |
.PP |
|
|
2792 |
The following global options are mapped to internal libtheora options |
|
|
2793 |
which affect the quality and the bitrate of the encoded stream. |
|
|
2794 |
.IP "\fBb\fR" 4 |
|
|
2795 |
.IX Item "b" |
|
|
2796 |
Set the video bitrate, only works if the \f(CW\*(C`qscale\*(C'\fR flag in |
|
|
2797 |
\&\fBflags\fR is not enabled. |
|
|
2798 |
.IP "\fBflags\fR" 4 |
|
|
2799 |
.IX Item "flags" |
|
|
2800 |
Used to enable constant quality mode encoding through the |
|
|
2801 |
\&\fBqscale\fR flag, and to enable the \f(CW\*(C`pass1\*(C'\fR and \f(CW\*(C`pass2\*(C'\fR |
|
|
2802 |
modes. |
|
|
2803 |
.IP "\fBg\fR" 4 |
|
|
2804 |
.IX Item "g" |
|
|
2805 |
Set the \s-1GOP\s0 size. |
|
|
2806 |
.IP "\fBglobal_quality\fR" 4 |
|
|
2807 |
.IX Item "global_quality" |
|
|
2808 |
Set the global quality in lambda units, only works if the |
|
|
2809 |
\&\f(CW\*(C`qscale\*(C'\fR flag in \fBflags\fR is enabled. The value is clipped |
|
|
2810 |
in the [0 \- 10*\f(CW\*(C`FF_QP2LAMBDA\*(C'\fR] range, and then multiplied for 6.3 |
|
|
2811 |
to get a value in the native libtheora range [0\-63]. A higher value |
|
|
2812 |
corresponds to a higher quality. |
|
|
2813 |
.Sp |
|
|
2814 |
For example, to set maximum constant quality encoding with |
|
|
2815 |
\&\fBffmpeg\fR: |
|
|
2816 |
.Sp |
|
|
2817 |
.Vb 1 |
|
|
2818 |
\& ffmpeg -i INPUT -flags:v qscale -global_quality:v "10*QP2LAMBDA" -codec:v libtheora OUTPUT.ogg |
|
|
2819 |
.Ve |
|
|
2820 |
.Sh "libvpx" |
|
|
2821 |
.IX Subsection "libvpx" |
|
|
2822 |
\&\s-1VP8\s0 format supported through libvpx. |
|
|
2823 |
.PP |
|
|
2824 |
Requires the presence of the libvpx headers and library during configuration. |
|
|
2825 |
You need to explicitly configure the build with \f(CW\*(C`\-\-enable\-libvpx\*(C'\fR. |
|
|
2826 |
.PP |
|
|
2827 |
\fIOptions\fR |
|
|
2828 |
.IX Subsection "Options" |
|
|
2829 |
.PP |
|
|
2830 |
Mapping from FFmpeg to libvpx options with conversion notes in parentheses. |
|
|
2831 |
.IP "\fBthreads\fR" 4 |
|
|
2832 |
.IX Item "threads" |
|
|
2833 |
g_threads |
|
|
2834 |
.IP "\fBprofile\fR" 4 |
|
|
2835 |
.IX Item "profile" |
|
|
2836 |
g_profile |
|
|
2837 |
.IP "\fBvb\fR" 4 |
|
|
2838 |
.IX Item "vb" |
|
|
2839 |
rc_target_bitrate |
|
|
2840 |
.IP "\fBg\fR" 4 |
|
|
2841 |
.IX Item "g" |
|
|
2842 |
kf_max_dist |
|
|
2843 |
.IP "\fBkeyint_min\fR" 4 |
|
|
2844 |
.IX Item "keyint_min" |
|
|
2845 |
kf_min_dist |
|
|
2846 |
.IP "\fBqmin\fR" 4 |
|
|
2847 |
.IX Item "qmin" |
|
|
2848 |
rc_min_quantizer |
|
|
2849 |
.IP "\fBqmax\fR" 4 |
|
|
2850 |
.IX Item "qmax" |
|
|
2851 |
rc_max_quantizer |
|
|
2852 |
.IP "\fBbufsize, vb\fR" 4 |
|
|
2853 |
.IX Item "bufsize, vb" |
|
|
2854 |
rc_buf_sz |
|
|
2855 |
\&\f(CW\*(C`(bufsize * 1000 / vb)\*(C'\fR |
|
|
2856 |
.Sp |
|
|
2857 |
rc_buf_optimal_sz |
|
|
2858 |
\&\f(CW\*(C`(bufsize * 1000 / vb * 5 / 6)\*(C'\fR |
|
|
2859 |
.IP "\fBrc_init_occupancy, vb\fR" 4 |
|
|
2860 |
.IX Item "rc_init_occupancy, vb" |
|
|
2861 |
rc_buf_initial_sz |
|
|
2862 |
\&\f(CW\*(C`(rc_init_occupancy * 1000 / vb)\*(C'\fR |
|
|
2863 |
.IP "\fBrc_buffer_aggressivity\fR" 4 |
|
|
2864 |
.IX Item "rc_buffer_aggressivity" |
|
|
2865 |
rc_undershoot_pct |
|
|
2866 |
.IP "\fBskip_threshold\fR" 4 |
|
|
2867 |
.IX Item "skip_threshold" |
|
|
2868 |
rc_dropframe_thresh |
|
|
2869 |
.IP "\fBqcomp\fR" 4 |
|
|
2870 |
.IX Item "qcomp" |
|
|
2871 |
rc_2pass_vbr_bias_pct |
|
|
2872 |
.IP "\fBmaxrate, vb\fR" 4 |
|
|
2873 |
.IX Item "maxrate, vb" |
|
|
2874 |
rc_2pass_vbr_maxsection_pct |
|
|
2875 |
\&\f(CW\*(C`(maxrate * 100 / vb)\*(C'\fR |
|
|
2876 |
.IP "\fBminrate, vb\fR" 4 |
|
|
2877 |
.IX Item "minrate, vb" |
|
|
2878 |
rc_2pass_vbr_minsection_pct |
|
|
2879 |
\&\f(CW\*(C`(minrate * 100 / vb)\*(C'\fR |
|
|
2880 |
.IP "\fBminrate, maxrate, vb\fR" 4 |
|
|
2881 |
.IX Item "minrate, maxrate, vb" |
|
|
2882 |
\&\f(CW\*(C`VPX_CBR\*(C'\fR |
|
|
2883 |
\&\f(CW\*(C`(minrate == maxrate == vb)\*(C'\fR |
|
|
2884 |
.IP "\fBcrf\fR" 4 |
|
|
2885 |
.IX Item "crf" |
|
|
2886 |
\&\f(CW\*(C`VPX_CQ\*(C'\fR, \f(CW\*(C`VP8E_SET_CQ_LEVEL\*(C'\fR |
|
|
2887 |
.IP "\fBquality\fR" 4 |
|
|
2888 |
.IX Item "quality" |
|
|
2889 |
.RS 4 |
|
|
2890 |
.PD 0 |
|
|
2891 |
.IP "\fIbest\fR" 4 |
|
|
2892 |
.IX Item "best" |
|
|
2893 |
.PD |
|
|
2894 |
\&\f(CW\*(C`VPX_DL_BEST_QUALITY\*(C'\fR |
|
|
2895 |
.IP "\fIgood\fR" 4 |
|
|
2896 |
.IX Item "good" |
|
|
2897 |
\&\f(CW\*(C`VPX_DL_GOOD_QUALITY\*(C'\fR |
|
|
2898 |
.IP "\fIrealtime\fR" 4 |
|
|
2899 |
.IX Item "realtime" |
|
|
2900 |
\&\f(CW\*(C`VPX_DL_REALTIME\*(C'\fR |
|
|
2901 |
.RE |
|
|
2902 |
.RS 4 |
|
|
2903 |
.RE |
|
|
2904 |
.IP "\fBspeed\fR" 4 |
|
|
2905 |
.IX Item "speed" |
|
|
2906 |
\&\f(CW\*(C`VP8E_SET_CPUUSED\*(C'\fR |
|
|
2907 |
.IP "\fBnr\fR" 4 |
|
|
2908 |
.IX Item "nr" |
|
|
2909 |
\&\f(CW\*(C`VP8E_SET_NOISE_SENSITIVITY\*(C'\fR |
|
|
2910 |
.IP "\fBmb_threshold\fR" 4 |
|
|
2911 |
.IX Item "mb_threshold" |
|
|
2912 |
\&\f(CW\*(C`VP8E_SET_STATIC_THRESHOLD\*(C'\fR |
|
|
2913 |
.IP "\fBslices\fR" 4 |
|
|
2914 |
.IX Item "slices" |
|
|
2915 |
\&\f(CW\*(C`VP8E_SET_TOKEN_PARTITIONS\*(C'\fR |
|
|
2916 |
.IP "\fBmax-intra-rate\fR" 4 |
|
|
2917 |
.IX Item "max-intra-rate" |
|
|
2918 |
\&\f(CW\*(C`VP8E_SET_MAX_INTRA_BITRATE_PCT\*(C'\fR |
|
|
2919 |
.IP "\fBforce_key_frames\fR" 4 |
|
|
2920 |
.IX Item "force_key_frames" |
|
|
2921 |
\&\f(CW\*(C`VPX_EFLAG_FORCE_KF\*(C'\fR |
|
|
2922 |
.IP "\fBAlternate reference frame related\fR" 4 |
|
|
2923 |
.IX Item "Alternate reference frame related" |
|
|
2924 |
.RS 4 |
|
|
2925 |
.PD 0 |
|
|
2926 |
.IP "\fBvp8flags altref\fR" 4 |
|
|
2927 |
.IX Item "vp8flags altref" |
|
|
2928 |
.PD |
|
|
2929 |
\&\f(CW\*(C`VP8E_SET_ENABLEAUTOALTREF\*(C'\fR |
|
|
2930 |
.IP "\fIarnr_max_frames\fR" 4 |
|
|
2931 |
.IX Item "arnr_max_frames" |
|
|
2932 |
\&\f(CW\*(C`VP8E_SET_ARNR_MAXFRAMES\*(C'\fR |
|
|
2933 |
.IP "\fIarnr_type\fR" 4 |
|
|
2934 |
.IX Item "arnr_type" |
|
|
2935 |
\&\f(CW\*(C`VP8E_SET_ARNR_TYPE\*(C'\fR |
|
|
2936 |
.IP "\fIarnr_strength\fR" 4 |
|
|
2937 |
.IX Item "arnr_strength" |
|
|
2938 |
\&\f(CW\*(C`VP8E_SET_ARNR_STRENGTH\*(C'\fR |
|
|
2939 |
.IP "\fIrc_lookahead\fR" 4 |
|
|
2940 |
.IX Item "rc_lookahead" |
|
|
2941 |
g_lag_in_frames |
|
|
2942 |
.RE |
|
|
2943 |
.RS 4 |
|
|
2944 |
.RE |
|
|
2945 |
.IP "\fBvp8flags error_resilient\fR" 4 |
|
|
2946 |
.IX Item "vp8flags error_resilient" |
|
|
2947 |
g_error_resilient |
|
|
2948 |
.PP |
|
|
2949 |
For more information about libvpx see: |
|
|
2950 |
<\fBhttp://www.webmproject.org/\fR> |
|
|
2951 |
.Sh "libx264" |
|
|
2952 |
.IX Subsection "libx264" |
|
|
2953 |
x264 H.264/MPEG\-4 \s-1AVC\s0 encoder wrapper. |
|
|
2954 |
.PP |
|
|
2955 |
This encoder requires the presence of the libx264 headers and library |
|
|
2956 |
during configuration. You need to explicitly configure the build with |
|
|
2957 |
\&\f(CW\*(C`\-\-enable\-libx264\*(C'\fR. |
|
|
2958 |
.PP |
|
|
2959 |
libx264 supports an impressive number of features, including 8x8 and |
|
|
2960 |
4x4 adaptive spatial transform, adaptive B\-frame placement, \s-1CAVLC/CABAC\s0 |
|
|
2961 |
entropy coding, interlacing (\s-1MBAFF\s0), lossless mode, psy optimizations |
|
|
2962 |
for detail retention (adaptive quantization, psy\-RD, psy\-trellis). |
|
|
2963 |
.PP |
|
|
2964 |
Many libx264 encoder options are mapped to FFmpeg global codec |
|
|
2965 |
options, while unique encoder options are provided through private |
|
|
2966 |
options. Additionally the \fBx264opts\fR and \fBx264\-params\fR |
|
|
2967 |
private options allows to pass a list of key=value tuples as accepted |
|
|
2968 |
by the libx264 \f(CW\*(C`x264_param_parse\*(C'\fR function. |
|
|
2969 |
.PP |
|
|
2970 |
The x264 project website is at |
|
|
2971 |
<\fBhttp://www.videolan.org/developers/x264.html\fR>. |
|
|
2972 |
.PP |
|
|
2973 |
\fIOptions\fR |
|
|
2974 |
.IX Subsection "Options" |
|
|
2975 |
.PP |
|
|
2976 |
The following options are supported by the libx264 wrapper. The |
|
|
2977 |
\&\fBx264\fR\-equivalent options or values are listed in parentheses |
|
|
2978 |
for easy migration. |
|
|
2979 |
.PP |
|
|
2980 |
To reduce the duplication of documentation, only the private options |
|
|
2981 |
and some others requiring special attention are documented here. For |
|
|
2982 |
the documentation of the undocumented generic options, see |
|
|
2983 |
the Codec Options chapter. |
|
|
2984 |
.PP |
|
|
2985 |
To get a more accurate and extensive documentation of the libx264 |
|
|
2986 |
options, invoke the command \fBx264 \-\-full\-help\fR or consult |
|
|
2987 |
the libx264 documentation. |
|
|
2988 |
.IP "\fBb (\fR\fIbitrate\fR\fB)\fR" 4 |
|
|
2989 |
.IX Item "b (bitrate)" |
|
|
2990 |
Set bitrate in bits/s. Note that FFmpeg's \fBb\fR option is |
|
|
2991 |
expressed in bits/s, while \fBx264\fR's \fBbitrate\fR is in |
|
|
2992 |
kilobits/s. |
|
|
2993 |
.IP "\fBbf (\fR\fIbframes\fR\fB)\fR" 4 |
|
|
2994 |
.IX Item "bf (bframes)" |
|
|
2995 |
.PD 0 |
|
|
2996 |
.IP "\fBg (\fR\fIkeyint\fR\fB)\fR" 4 |
|
|
2997 |
.IX Item "g (keyint)" |
|
|
2998 |
.IP "\fBqmax (\fR\fIqpmax\fR\fB)\fR" 4 |
|
|
2999 |
.IX Item "qmax (qpmax)" |
|
|
3000 |
.IP "\fBqmin (\fR\fIqpmin\fR\fB)\fR" 4 |
|
|
3001 |
.IX Item "qmin (qpmin)" |
|
|
3002 |
.IP "\fBqdiff (\fR\fIqpstep\fR\fB)\fR" 4 |
|
|
3003 |
.IX Item "qdiff (qpstep)" |
|
|
3004 |
.IP "\fBqblur (\fR\fIqblur\fR\fB)\fR" 4 |
|
|
3005 |
.IX Item "qblur (qblur)" |
|
|
3006 |
.IP "\fBqcomp (\fR\fIqcomp\fR\fB)\fR" 4 |
|
|
3007 |
.IX Item "qcomp (qcomp)" |
|
|
3008 |
.IP "\fBrefs (\fR\fIref\fR\fB)\fR" 4 |
|
|
3009 |
.IX Item "refs (ref)" |
|
|
3010 |
.IP "\fBsc_threshold (\fR\fIscenecut\fR\fB)\fR" 4 |
|
|
3011 |
.IX Item "sc_threshold (scenecut)" |
|
|
3012 |
.IP "\fBtrellis (\fR\fItrellis\fR\fB)\fR" 4 |
|
|
3013 |
.IX Item "trellis (trellis)" |
|
|
3014 |
.IP "\fBnr (\fR\fInr\fR\fB)\fR" 4 |
|
|
3015 |
.IX Item "nr (nr)" |
|
|
3016 |
.IP "\fBme_range (\fR\fImerange\fR\fB)\fR" 4 |
|
|
3017 |
.IX Item "me_range (merange)" |
|
|
3018 |
.IP "\fBme_method (\fR\fIme\fR\fB)\fR" 4 |
|
|
3019 |
.IX Item "me_method (me)" |
|
|
3020 |
.PD |
|
|
3021 |
Set motion estimation method. Possible values in the decreasing order |
|
|
3022 |
of speed: |
|
|
3023 |
.RS 4 |
|
|
3024 |
.IP "\fBdia (\fR\fIdia\fR\fB)\fR" 4 |
|
|
3025 |
.IX Item "dia (dia)" |
|
|
3026 |
.PD 0 |
|
|
3027 |
.IP "\fBepzs (\fR\fIdia\fR\fB)\fR" 4 |
|
|
3028 |
.IX Item "epzs (dia)" |
|
|
3029 |
.PD |
|
|
3030 |
Diamond search with radius 1 (fastest). \fBepzs\fR is an alias for |
|
|
3031 |
\&\fBdia\fR. |
|
|
3032 |
.IP "\fBhex (\fR\fIhex\fR\fB)\fR" 4 |
|
|
3033 |
.IX Item "hex (hex)" |
|
|
3034 |
Hexagonal search with radius 2. |
|
|
3035 |
.IP "\fBumh (\fR\fIumh\fR\fB)\fR" 4 |
|
|
3036 |
.IX Item "umh (umh)" |
|
|
3037 |
Uneven multi-hexagon search. |
|
|
3038 |
.IP "\fBesa (\fR\fIesa\fR\fB)\fR" 4 |
|
|
3039 |
.IX Item "esa (esa)" |
|
|
3040 |
Exhaustive search. |
|
|
3041 |
.IP "\fBtesa (\fR\fItesa\fR\fB)\fR" 4 |
|
|
3042 |
.IX Item "tesa (tesa)" |
|
|
3043 |
Hadamard exhaustive search (slowest). |
|
|
3044 |
.RE |
|
|
3045 |
.RS 4 |
|
|
3046 |
.RE |
|
|
3047 |
.IP "\fBsubq (\fR\fIsubme\fR\fB)\fR" 4 |
|
|
3048 |
.IX Item "subq (subme)" |
|
|
3049 |
.PD 0 |
|
|
3050 |
.IP "\fBb_strategy (\fR\fIb\-adapt\fR\fB)\fR" 4 |
|
|
3051 |
.IX Item "b_strategy (b-adapt)" |
|
|
3052 |
.IP "\fBkeyint_min (\fR\fImin-keyint\fR\fB)\fR" 4 |
|
|
3053 |
.IX Item "keyint_min (min-keyint)" |
|
|
3054 |
.IP "\fBcoder\fR" 4 |
|
|
3055 |
.IX Item "coder" |
|
|
3056 |
.PD |
|
|
3057 |
Set entropy encoder. Possible values: |
|
|
3058 |
.RS 4 |
|
|
3059 |
.IP "\fBac\fR" 4 |
|
|
3060 |
.IX Item "ac" |
|
|
3061 |
Enable \s-1CABAC\s0. |
|
|
3062 |
.IP "\fBvlc\fR" 4 |
|
|
3063 |
.IX Item "vlc" |
|
|
3064 |
Enable \s-1CAVLC\s0 and disable \s-1CABAC\s0. It generates the same effect as |
|
|
3065 |
\&\fBx264\fR's \fB\-\-no\-cabac\fR option. |
|
|
3066 |
.RE |
|
|
3067 |
.RS 4 |
|
|
3068 |
.RE |
|
|
3069 |
.IP "\fBcmp\fR" 4 |
|
|
3070 |
.IX Item "cmp" |
|
|
3071 |
Set full pixel motion estimation comparation algorithm. Possible values: |
|
|
3072 |
.RS 4 |
|
|
3073 |
.IP "\fBchroma\fR" 4 |
|
|
3074 |
.IX Item "chroma" |
|
|
3075 |
Enable chroma in motion estimation. |
|
|
3076 |
.IP "\fBsad\fR" 4 |
|
|
3077 |
.IX Item "sad" |
|
|
3078 |
Ignore chroma in motion estimation. It generates the same effect as |
|
|
3079 |
\&\fBx264\fR's \fB\-\-no\-chroma\-me\fR option. |
|
|
3080 |
.RE |
|
|
3081 |
.RS 4 |
|
|
3082 |
.RE |
|
|
3083 |
.IP "\fBthreads (\fR\fIthreads\fR\fB)\fR" 4 |
|
|
3084 |
.IX Item "threads (threads)" |
|
|
3085 |
.PD 0 |
|
|
3086 |
.IP "\fBthread_type\fR" 4 |
|
|
3087 |
.IX Item "thread_type" |
|
|
3088 |
.PD |
|
|
3089 |
Set multithreading technique. Possible values: |
|
|
3090 |
.RS 4 |
|
|
3091 |
.IP "\fBslice\fR" 4 |
|
|
3092 |
.IX Item "slice" |
|
|
3093 |
Slice-based multithreading. It generates the same effect as |
|
|
3094 |
\&\fBx264\fR's \fB\-\-sliced\-threads\fR option. |
|
|
3095 |
.IP "\fBframe\fR" 4 |
|
|
3096 |
.IX Item "frame" |
|
|
3097 |
Frame-based multithreading. |
|
|
3098 |
.RE |
|
|
3099 |
.RS 4 |
|
|
3100 |
.RE |
|
|
3101 |
.IP "\fBflags\fR" 4 |
|
|
3102 |
.IX Item "flags" |
|
|
3103 |
Set encoding flags. It can be used to disable closed \s-1GOP\s0 and enable |
|
|
3104 |
open \s-1GOP\s0 by setting it to \f(CW\*(C`\-cgop\*(C'\fR. The result is similar to |
|
|
3105 |
the behavior of \fBx264\fR's \fB\-\-open\-gop\fR option. |
|
|
3106 |
.IP "\fBrc_init_occupancy (\fR\fIvbv-init\fR\fB)\fR" 4 |
|
|
3107 |
.IX Item "rc_init_occupancy (vbv-init)" |
|
|
3108 |
.PD 0 |
|
|
3109 |
.IP "\fBpreset (\fR\fIpreset\fR\fB)\fR" 4 |
|
|
3110 |
.IX Item "preset (preset)" |
|
|
3111 |
.PD |
|
|
3112 |
Set the encoding preset. |
|
|
3113 |
.IP "\fBtune (\fR\fItune\fR\fB)\fR" 4 |
|
|
3114 |
.IX Item "tune (tune)" |
|
|
3115 |
Set tuning of the encoding params. |
|
|
3116 |
.IP "\fBprofile (\fR\fIprofile\fR\fB)\fR" 4 |
|
|
3117 |
.IX Item "profile (profile)" |
|
|
3118 |
Set profile restrictions. |
|
|
3119 |
.IP "\fBfastfirstpass\fR" 4 |
|
|
3120 |
.IX Item "fastfirstpass" |
|
|
3121 |
Enable fast settings when encoding first pass, when set to 1. When set |
|
|
3122 |
to 0, it has the same effect of \fBx264\fR's |
|
|
3123 |
\&\fB\-\-slow\-firstpass\fR option. |
|
|
3124 |
.IP "\fBcrf (\fR\fIcrf\fR\fB)\fR" 4 |
|
|
3125 |
.IX Item "crf (crf)" |
|
|
3126 |
Set the quality for constant quality mode. |
|
|
3127 |
.IP "\fBcrf_max (\fR\fIcrf-max\fR\fB)\fR" 4 |
|
|
3128 |
.IX Item "crf_max (crf-max)" |
|
|
3129 |
In \s-1CRF\s0 mode, prevents \s-1VBV\s0 from lowering quality beyond this point. |
|
|
3130 |
.IP "\fBqp (\fR\fIqp\fR\fB)\fR" 4 |
|
|
3131 |
.IX Item "qp (qp)" |
|
|
3132 |
Set constant quantization rate control method parameter. |
|
|
3133 |
.IP "\fBaq-mode (\fR\fIaq-mode\fR\fB)\fR" 4 |
|
|
3134 |
.IX Item "aq-mode (aq-mode)" |
|
|
3135 |
Set \s-1AQ\s0 method. Possible values: |
|
|
3136 |
.RS 4 |
|
|
3137 |
.IP "\fBnone (\fR\fI0\fR\fB)\fR" 4 |
|
|
3138 |
.IX Item "none (0)" |
|
|
3139 |
Disabled. |
|
|
3140 |
.IP "\fBvariance (\fR\fI1\fR\fB)\fR" 4 |
|
|
3141 |
.IX Item "variance (1)" |
|
|
3142 |
Variance \s-1AQ\s0 (complexity mask). |
|
|
3143 |
.IP "\fBautovariance (\fR\fI2\fR\fB)\fR" 4 |
|
|
3144 |
.IX Item "autovariance (2)" |
|
|
3145 |
Auto-variance \s-1AQ\s0 (experimental). |
|
|
3146 |
.RE |
|
|
3147 |
.RS 4 |
|
|
3148 |
.RE |
|
|
3149 |
.IP "\fBaq-strength (\fR\fIaq-strength\fR\fB)\fR" 4 |
|
|
3150 |
.IX Item "aq-strength (aq-strength)" |
|
|
3151 |
Set \s-1AQ\s0 strength, reduce blocking and blurring in flat and textured areas. |
|
|
3152 |
.IP "\fBpsy\fR" 4 |
|
|
3153 |
.IX Item "psy" |
|
|
3154 |
Use psychovisual optimizations when set to 1. When set to 0, it has the |
|
|
3155 |
same effect as \fBx264\fR's \fB\-\-no\-psy\fR option. |
|
|
3156 |
.IP "\fBpsy-rd (\fR\fIpsy-rd\fR\fB)\fR" 4 |
|
|
3157 |
.IX Item "psy-rd (psy-rd)" |
|
|
3158 |
Set strength of psychovisual optimization, in |
|
|
3159 |
\&\fIpsy-rd\fR:\fIpsy-trellis\fR format. |
|
|
3160 |
.IP "\fBrc-lookahead (\fR\fIrc-lookahead\fR\fB)\fR" 4 |
|
|
3161 |
.IX Item "rc-lookahead (rc-lookahead)" |
|
|
3162 |
Set number of frames to look ahead for frametype and ratecontrol. |
|
|
3163 |
.IP "\fBweightb\fR" 4 |
|
|
3164 |
.IX Item "weightb" |
|
|
3165 |
Enable weighted prediction for B\-frames when set to 1. When set to 0, |
|
|
3166 |
it has the same effect as \fBx264\fR's \fB\-\-no\-weightb\fR option. |
|
|
3167 |
.IP "\fBweightp (\fR\fIweightp\fR\fB)\fR" 4 |
|
|
3168 |
.IX Item "weightp (weightp)" |
|
|
3169 |
Set weighted prediction method for P\-frames. Possible values: |
|
|
3170 |
.RS 4 |
|
|
3171 |
.IP "\fBnone (\fR\fI0\fR\fB)\fR" 4 |
|
|
3172 |
.IX Item "none (0)" |
|
|
3173 |
Disabled |
|
|
3174 |
.IP "\fBsimple (\fR\fI1\fR\fB)\fR" 4 |
|
|
3175 |
.IX Item "simple (1)" |
|
|
3176 |
Enable only weighted refs |
|
|
3177 |
.IP "\fBsmart (\fR\fI2\fR\fB)\fR" 4 |
|
|
3178 |
.IX Item "smart (2)" |
|
|
3179 |
Enable both weighted refs and duplicates |
|
|
3180 |
.RE |
|
|
3181 |
.RS 4 |
|
|
3182 |
.RE |
|
|
3183 |
.IP "\fBssim (\fR\fIssim\fR\fB)\fR" 4 |
|
|
3184 |
.IX Item "ssim (ssim)" |
|
|
3185 |
Enable calculation and printing \s-1SSIM\s0 stats after the encoding. |
|
|
3186 |
.IP "\fBintra-refresh (\fR\fIintra-refresh\fR\fB)\fR" 4 |
|
|
3187 |
.IX Item "intra-refresh (intra-refresh)" |
|
|
3188 |
Enable the use of Periodic Intra Refresh instead of \s-1IDR\s0 frames when set |
|
|
3189 |
to 1. |
|
|
3190 |
.IP "\fBbluray-compat (\fR\fIbluray-compat\fR\fB)\fR" 4 |
|
|
3191 |
.IX Item "bluray-compat (bluray-compat)" |
|
|
3192 |
Configure the encoder to be compatible with the bluray standard. |
|
|
3193 |
It is a shorthand for setting \*(L"bluray\-compat=1 force\-cfr=1\*(R". |
|
|
3194 |
.IP "\fBb\-bias (\fR\fIb\-bias\fR\fB)\fR" 4 |
|
|
3195 |
.IX Item "b-bias (b-bias)" |
|
|
3196 |
Set the influence on how often B\-frames are used. |
|
|
3197 |
.IP "\fBb\-pyramid (\fR\fIb\-pyramid\fR\fB)\fR" 4 |
|
|
3198 |
.IX Item "b-pyramid (b-pyramid)" |
|
|
3199 |
Set method for keeping of some B\-frames as references. Possible values: |
|
|
3200 |
.RS 4 |
|
|
3201 |
.IP "\fBnone (\fR\fInone\fR\fB)\fR" 4 |
|
|
3202 |
.IX Item "none (none)" |
|
|
3203 |
Disabled. |
|
|
3204 |
.IP "\fBstrict (\fR\fIstrict\fR\fB)\fR" 4 |
|
|
3205 |
.IX Item "strict (strict)" |
|
|
3206 |
Strictly hierarchical pyramid. |
|
|
3207 |
.IP "\fBnormal (\fR\fInormal\fR\fB)\fR" 4 |
|
|
3208 |
.IX Item "normal (normal)" |
|
|
3209 |
Non-strict (not Blu-ray compatible). |
|
|
3210 |
.RE |
|
|
3211 |
.RS 4 |
|
|
3212 |
.RE |
|
|
3213 |
.IP "\fBmixed-refs\fR" 4 |
|
|
3214 |
.IX Item "mixed-refs" |
|
|
3215 |
Enable the use of one reference per partition, as opposed to one |
|
|
3216 |
reference per macroblock when set to 1. When set to 0, it has the |
|
|
3217 |
same effect as \fBx264\fR's \fB\-\-no\-mixed\-refs\fR option. |
|
|
3218 |
.IP "\fB8x8dct\fR" 4 |
|
|
3219 |
.IX Item "8x8dct" |
|
|
3220 |
Enable adaptive spatial transform (high profile 8x8 transform) |
|
|
3221 |
when set to 1. When set to 0, it has the same effect as |
|
|
3222 |
\&\fBx264\fR's \fB\-\-no\-8x8dct\fR option. |
|
|
3223 |
.IP "\fBfast-pskip\fR" 4 |
|
|
3224 |
.IX Item "fast-pskip" |
|
|
3225 |
Enable early \s-1SKIP\s0 detection on P\-frames when set to 1. When set |
|
|
3226 |
to 0, it has the same effect as \fBx264\fR's |
|
|
3227 |
\&\fB\-\-no\-fast\-pskip\fR option. |
|
|
3228 |
.IP "\fBaud (\fR\fIaud\fR\fB)\fR" 4 |
|
|
3229 |
.IX Item "aud (aud)" |
|
|
3230 |
Enable use of access unit delimiters when set to 1. |
|
|
3231 |
.IP "\fBmbtree\fR" 4 |
|
|
3232 |
.IX Item "mbtree" |
|
|
3233 |
Enable use macroblock tree ratecontrol when set to 1. When set |
|
|
3234 |
to 0, it has the same effect as \fBx264\fR's |
|
|
3235 |
\&\fB\-\-no\-mbtree\fR option. |
|
|
3236 |
.IP "\fBdeblock (\fR\fIdeblock\fR\fB)\fR" 4 |
|
|
3237 |
.IX Item "deblock (deblock)" |
|
|
3238 |
Set loop filter parameters, in \fIalpha\fR:\fIbeta\fR form. |
|
|
3239 |
.IP "\fBcplxblur (\fR\fIcplxblur\fR\fB)\fR" 4 |
|
|
3240 |
.IX Item "cplxblur (cplxblur)" |
|
|
3241 |
Set fluctuations reduction in \s-1QP\s0 (before curve compression). |
|
|
3242 |
.IP "\fBpartitions (\fR\fIpartitions\fR\fB)\fR" 4 |
|
|
3243 |
.IX Item "partitions (partitions)" |
|
|
3244 |
Set partitions to consider as a comma-separated list of. Possible |
|
|
3245 |
values in the list: |
|
|
3246 |
.RS 4 |
|
|
3247 |
.IP "\fBp8x8\fR" 4 |
|
|
3248 |
.IX Item "p8x8" |
|
|
3249 |
8x8 P\-frame partition. |
|
|
3250 |
.IP "\fBp4x4\fR" 4 |
|
|
3251 |
.IX Item "p4x4" |
|
|
3252 |
4x4 P\-frame partition. |
|
|
3253 |
.IP "\fBb8x8\fR" 4 |
|
|
3254 |
.IX Item "b8x8" |
|
|
3255 |
4x4 B\-frame partition. |
|
|
3256 |
.IP "\fBi8x8\fR" 4 |
|
|
3257 |
.IX Item "i8x8" |
|
|
3258 |
8x8 I\-frame partition. |
|
|
3259 |
.IP "\fBi4x4\fR" 4 |
|
|
3260 |
.IX Item "i4x4" |
|
|
3261 |
4x4 I\-frame partition. |
|
|
3262 |
(Enabling \fBp4x4\fR requires \fBp8x8\fR to be enabled. Enabling |
|
|
3263 |
\&\fBi8x8\fR requires adaptive spatial transform (\fB8x8dct\fR |
|
|
3264 |
option) to be enabled.) |
|
|
3265 |
.IP "\fBnone (\fR\fInone\fR\fB)\fR" 4 |
|
|
3266 |
.IX Item "none (none)" |
|
|
3267 |
Do not consider any partitions. |
|
|
3268 |
.IP "\fBall (\fR\fIall\fR\fB)\fR" 4 |
|
|
3269 |
.IX Item "all (all)" |
|
|
3270 |
Consider every partition. |
|
|
3271 |
.RE |
|
|
3272 |
.RS 4 |
|
|
3273 |
.RE |
|
|
3274 |
.IP "\fBdirect-pred (\fR\fIdirect\fR\fB)\fR" 4 |
|
|
3275 |
.IX Item "direct-pred (direct)" |
|
|
3276 |
Set direct \s-1MV\s0 prediction mode. Possible values: |
|
|
3277 |
.RS 4 |
|
|
3278 |
.IP "\fBnone (\fR\fInone\fR\fB)\fR" 4 |
|
|
3279 |
.IX Item "none (none)" |
|
|
3280 |
Disable \s-1MV\s0 prediction. |
|
|
3281 |
.IP "\fBspatial (\fR\fIspatial\fR\fB)\fR" 4 |
|
|
3282 |
.IX Item "spatial (spatial)" |
|
|
3283 |
Enable spatial predicting. |
|
|
3284 |
.IP "\fBtemporal (\fR\fItemporal\fR\fB)\fR" 4 |
|
|
3285 |
.IX Item "temporal (temporal)" |
|
|
3286 |
Enable temporal predicting. |
|
|
3287 |
.IP "\fBauto (\fR\fIauto\fR\fB)\fR" 4 |
|
|
3288 |
.IX Item "auto (auto)" |
|
|
3289 |
Automatically decided. |
|
|
3290 |
.RE |
|
|
3291 |
.RS 4 |
|
|
3292 |
.RE |
|
|
3293 |
.IP "\fBslice-max-size (\fR\fIslice-max-size\fR\fB)\fR" 4 |
|
|
3294 |
.IX Item "slice-max-size (slice-max-size)" |
|
|
3295 |
Set the limit of the size of each slice in bytes. If not specified |
|
|
3296 |
but \s-1RTP\s0 payload size (\fBps\fR) is specified, that is used. |
|
|
3297 |
.IP "\fBstats (\fR\fIstats\fR\fB)\fR" 4 |
|
|
3298 |
.IX Item "stats (stats)" |
|
|
3299 |
Set the file name for multi-pass stats. |
|
|
3300 |
.IP "\fBnal-hrd (\fR\fInal-hrd\fR\fB)\fR" 4 |
|
|
3301 |
.IX Item "nal-hrd (nal-hrd)" |
|
|
3302 |
Set signal \s-1HRD\s0 information (requires \fBvbv-bufsize\fR to be set). |
|
|
3303 |
Possible values: |
|
|
3304 |
.RS 4 |
|
|
3305 |
.IP "\fBnone (\fR\fInone\fR\fB)\fR" 4 |
|
|
3306 |
.IX Item "none (none)" |
|
|
3307 |
Disable \s-1HRD\s0 information signaling. |
|
|
3308 |
.IP "\fBvbr (\fR\fIvbr\fR\fB)\fR" 4 |
|
|
3309 |
.IX Item "vbr (vbr)" |
|
|
3310 |
Variable bit rate. |
|
|
3311 |
.IP "\fBcbr (\fR\fIcbr\fR\fB)\fR" 4 |
|
|
3312 |
.IX Item "cbr (cbr)" |
|
|
3313 |
Constant bit rate (not allowed in \s-1MP4\s0 container). |
|
|
3314 |
.RE |
|
|
3315 |
.RS 4 |
|
|
3316 |
.RE |
|
|
3317 |
.IP "\fBx264opts (N.A.)\fR" 4 |
|
|
3318 |
.IX Item "x264opts (N.A.)" |
|
|
3319 |
Set any x264 option, see \fBx264 \-\-fullhelp\fR for a list. |
|
|
3320 |
.Sp |
|
|
3321 |
Argument is a list of \fIkey\fR=\fIvalue\fR couples separated by |
|
|
3322 |
\&\*(L":\*(R". In \fIfilter\fR and \fIpsy-rd\fR options that use \*(L":\*(R" as a separator |
|
|
3323 |
themselves, use \*(L",\*(R" instead. They accept it as well since long ago but this |
|
|
3324 |
is kept undocumented for some reason. |
|
|
3325 |
.Sp |
|
|
3326 |
For example to specify libx264 encoding options with \fBffmpeg\fR: |
|
|
3327 |
.Sp |
|
|
3328 |
.Vb 1 |
|
|
3329 |
\& ffmpeg -i foo.mpg -vcodec libx264 -x264opts keyint=123:min-keyint=20 -an out.mkv |
|
|
3330 |
.Ve |
|
|
3331 |
.IP "\fBx264\-params (N.A.)\fR" 4 |
|
|
3332 |
.IX Item "x264-params (N.A.)" |
|
|
3333 |
Override the x264 configuration using a :\-separated list of key=value |
|
|
3334 |
parameters. |
|
|
3335 |
.Sp |
|
|
3336 |
This option is functionally the same as the \fBx264opts\fR, but is |
|
|
3337 |
duplicated for compability with the Libav fork. |
|
|
3338 |
.Sp |
|
|
3339 |
For example to specify libx264 encoding options with \fBffmpeg\fR: |
|
|
3340 |
.Sp |
|
|
3341 |
.Vb 3 |
|
|
3342 |
\& ffmpeg -i INPUT -c:v libx264 -x264-params level=30:bframes=0:weightp=0:\e |
|
|
3343 |
\& cabac=0:ref=1:vbv-maxrate=768:vbv-bufsize=2000:analyse=all:me=umh:\e |
|
|
3344 |
\& no-fast-pskip=1:subq=6:8x8dct=0:trellis=0 OUTPUT |
|
|
3345 |
.Ve |
|
|
3346 |
.PP |
|
|
3347 |
Encoding ffpresets for common usages are provided so they can be used with the |
|
|
3348 |
general presets system (e.g. passing the \fBpre\fR option). |
|
|
3349 |
.Sh "libxvid" |
|
|
3350 |
.IX Subsection "libxvid" |
|
|
3351 |
Xvid \s-1MPEG\-4\s0 Part 2 encoder wrapper. |
|
|
3352 |
.PP |
|
|
3353 |
This encoder requires the presence of the libxvidcore headers and library |
|
|
3354 |
during configuration. You need to explicitly configure the build with |
|
|
3355 |
\&\f(CW\*(C`\-\-enable\-libxvid \-\-enable\-gpl\*(C'\fR. |
|
|
3356 |
.PP |
|
|
3357 |
The native \f(CW\*(C`mpeg4\*(C'\fR encoder supports the \s-1MPEG\-4\s0 Part 2 format, so |
|
|
3358 |
users can encode to this format without this library. |
|
|
3359 |
.PP |
|
|
3360 |
\fIOptions\fR |
|
|
3361 |
.IX Subsection "Options" |
|
|
3362 |
.PP |
|
|
3363 |
The following options are supported by the libxvid wrapper. Some of |
|
|
3364 |
the following options are listed but are not documented, and |
|
|
3365 |
correspond to shared codec options. See the Codec |
|
|
3366 |
Options chapter for their documentation. The other shared options |
|
|
3367 |
which are not listed have no effect for the libxvid encoder. |
|
|
3368 |
.IP "\fBb\fR" 4 |
|
|
3369 |
.IX Item "b" |
|
|
3370 |
.PD 0 |
|
|
3371 |
.IP "\fBg\fR" 4 |
|
|
3372 |
.IX Item "g" |
|
|
3373 |
.IP "\fBqmin\fR" 4 |
|
|
3374 |
.IX Item "qmin" |
|
|
3375 |
.IP "\fBqmax\fR" 4 |
|
|
3376 |
.IX Item "qmax" |
|
|
3377 |
.IP "\fBmpeg_quant\fR" 4 |
|
|
3378 |
.IX Item "mpeg_quant" |
|
|
3379 |
.IP "\fBthreads\fR" 4 |
|
|
3380 |
.IX Item "threads" |
|
|
3381 |
.IP "\fBbf\fR" 4 |
|
|
3382 |
.IX Item "bf" |
|
|
3383 |
.IP "\fBb_qfactor\fR" 4 |
|
|
3384 |
.IX Item "b_qfactor" |
|
|
3385 |
.IP "\fBb_qoffset\fR" 4 |
|
|
3386 |
.IX Item "b_qoffset" |
|
|
3387 |
.IP "\fBflags\fR" 4 |
|
|
3388 |
.IX Item "flags" |
|
|
3389 |
.PD |
|
|
3390 |
Set specific encoding flags. Possible values: |
|
|
3391 |
.RS 4 |
|
|
3392 |
.IP "\fBmv4\fR" 4 |
|
|
3393 |
.IX Item "mv4" |
|
|
3394 |
Use four motion vector by macroblock. |
|
|
3395 |
.IP "\fBaic\fR" 4 |
|
|
3396 |
.IX Item "aic" |
|
|
3397 |
Enable high quality \s-1AC\s0 prediction. |
|
|
3398 |
.IP "\fBgray\fR" 4 |
|
|
3399 |
.IX Item "gray" |
|
|
3400 |
Only encode grayscale. |
|
|
3401 |
.IP "\fBgmc\fR" 4 |
|
|
3402 |
.IX Item "gmc" |
|
|
3403 |
Enable the use of global motion compensation (\s-1GMC\s0). |
|
|
3404 |
.IP "\fBqpel\fR" 4 |
|
|
3405 |
.IX Item "qpel" |
|
|
3406 |
Enable quarter-pixel motion compensation. |
|
|
3407 |
.IP "\fBcgop\fR" 4 |
|
|
3408 |
.IX Item "cgop" |
|
|
3409 |
Enable closed \s-1GOP\s0. |
|
|
3410 |
.IP "\fBglobal_header\fR" 4 |
|
|
3411 |
.IX Item "global_header" |
|
|
3412 |
Place global headers in extradata instead of every keyframe. |
|
|
3413 |
.RE |
|
|
3414 |
.RS 4 |
|
|
3415 |
.RE |
|
|
3416 |
.IP "\fBtrellis\fR" 4 |
|
|
3417 |
.IX Item "trellis" |
|
|
3418 |
.PD 0 |
|
|
3419 |
.IP "\fBme_method\fR" 4 |
|
|
3420 |
.IX Item "me_method" |
|
|
3421 |
.PD |
|
|
3422 |
Set motion estimation method. Possible values in decreasing order of |
|
|
3423 |
speed and increasing order of quality: |
|
|
3424 |
.RS 4 |
|
|
3425 |
.IP "\fBzero\fR" 4 |
|
|
3426 |
.IX Item "zero" |
|
|
3427 |
Use no motion estimation (default). |
|
|
3428 |
.IP "\fBphods\fR" 4 |
|
|
3429 |
.IX Item "phods" |
|
|
3430 |
.PD 0 |
|
|
3431 |
.IP "\fBx1\fR" 4 |
|
|
3432 |
.IX Item "x1" |
|
|
3433 |
.IP "\fBlog\fR" 4 |
|
|
3434 |
.IX Item "log" |
|
|
3435 |
.PD |
|
|
3436 |
Enable advanced diamond zonal search for 16x16 blocks and half-pixel |
|
|
3437 |
refinement for 16x16 blocks. \fBx1\fR and \fBlog\fR are aliases for |
|
|
3438 |
\&\fBphods\fR. |
|
|
3439 |
.IP "\fBepzs\fR" 4 |
|
|
3440 |
.IX Item "epzs" |
|
|
3441 |
Enable all of the things described above, plus advanced diamond zonal |
|
|
3442 |
search for 8x8 blocks, half-pixel refinement for 8x8 blocks, and motion |
|
|
3443 |
estimation on chroma planes. |
|
|
3444 |
.IP "\fBfull\fR" 4 |
|
|
3445 |
.IX Item "full" |
|
|
3446 |
Enable all of the things described above, plus extended 16x16 and 8x8 |
|
|
3447 |
blocks search. |
|
|
3448 |
.RE |
|
|
3449 |
.RS 4 |
|
|
3450 |
.RE |
|
|
3451 |
.IP "\fBmbd\fR" 4 |
|
|
3452 |
.IX Item "mbd" |
|
|
3453 |
Set macroblock decision algorithm. Possible values in the increasing |
|
|
3454 |
order of quality: |
|
|
3455 |
.RS 4 |
|
|
3456 |
.IP "\fBsimple\fR" 4 |
|
|
3457 |
.IX Item "simple" |
|
|
3458 |
Use macroblock comparing function algorithm (default). |
|
|
3459 |
.IP "\fBbits\fR" 4 |
|
|
3460 |
.IX Item "bits" |
|
|
3461 |
Enable rate distortion-based half pixel and quarter pixel refinement for |
|
|
3462 |
16x16 blocks. |
|
|
3463 |
.IP "\fBrd\fR" 4 |
|
|
3464 |
.IX Item "rd" |
|
|
3465 |
Enable all of the things described above, plus rate distortion-based |
|
|
3466 |
half pixel and quarter pixel refinement for 8x8 blocks, and rate |
|
|
3467 |
distortion-based search using square pattern. |
|
|
3468 |
.RE |
|
|
3469 |
.RS 4 |
|
|
3470 |
.RE |
|
|
3471 |
.IP "\fBlumi_aq\fR" 4 |
|
|
3472 |
.IX Item "lumi_aq" |
|
|
3473 |
Enable lumi masking adaptive quantization when set to 1. Default is 0 |
|
|
3474 |
(disabled). |
|
|
3475 |
.IP "\fBvariance_aq\fR" 4 |
|
|
3476 |
.IX Item "variance_aq" |
|
|
3477 |
Enable variance adaptive quantization when set to 1. Default is 0 |
|
|
3478 |
(disabled). |
|
|
3479 |
.Sp |
|
|
3480 |
When combined with \fBlumi_aq\fR, the resulting quality will not |
|
|
3481 |
be better than any of the two specified individually. In other |
|
|
3482 |
words, the resulting quality will be the worse one of the two |
|
|
3483 |
effects. |
|
|
3484 |
.IP "\fBssim\fR" 4 |
|
|
3485 |
.IX Item "ssim" |
|
|
3486 |
Set structural similarity (\s-1SSIM\s0) displaying method. Possible values: |
|
|
3487 |
.RS 4 |
|
|
3488 |
.IP "\fBoff\fR" 4 |
|
|
3489 |
.IX Item "off" |
|
|
3490 |
Disable displaying of \s-1SSIM\s0 information. |
|
|
3491 |
.IP "\fBavg\fR" 4 |
|
|
3492 |
.IX Item "avg" |
|
|
3493 |
Output average \s-1SSIM\s0 at the end of encoding to stdout. The format of |
|
|
3494 |
showing the average \s-1SSIM\s0 is: |
|
|
3495 |
.Sp |
|
|
3496 |
.Vb 1 |
|
|
3497 |
\& Average SSIM: %f |
|
|
3498 |
.Ve |
|
|
3499 |
.Sp |
|
|
3500 |
For users who are not familiar with C, \f(CW%f\fR means a float number, or |
|
|
3501 |
a decimal (e.g. 0.939232). |
|
|
3502 |
.IP "\fBframe\fR" 4 |
|
|
3503 |
.IX Item "frame" |
|
|
3504 |
Output both per-frame \s-1SSIM\s0 data during encoding and average \s-1SSIM\s0 at |
|
|
3505 |
the end of encoding to stdout. The format of per-frame information |
|
|
3506 |
is: |
|
|
3507 |
.Sp |
|
|
3508 |
.Vb 1 |
|
|
3509 |
\& SSIM: avg: %1.3f min: %1.3f max: %1.3f |
|
|
3510 |
.Ve |
|
|
3511 |
.Sp |
|
|
3512 |
For users who are not familiar with C, \f(CW%1\fR.3f means a float number |
|
|
3513 |
rounded to 3 digits after the dot (e.g. 0.932). |
|
|
3514 |
.RE |
|
|
3515 |
.RS 4 |
|
|
3516 |
.RE |
|
|
3517 |
.IP "\fBssim_acc\fR" 4 |
|
|
3518 |
.IX Item "ssim_acc" |
|
|
3519 |
Set \s-1SSIM\s0 accuracy. Valid options are integers within the range of |
|
|
3520 |
0\-4, while 0 gives the most accurate result and 4 computes the |
|
|
3521 |
fastest. |
|
|
3522 |
.Sh "png" |
|
|
3523 |
.IX Subsection "png" |
|
|
3524 |
\&\s-1PNG\s0 image encoder. |
|
|
3525 |
.PP |
|
|
3526 |
\fIPrivate options\fR |
|
|
3527 |
.IX Subsection "Private options" |
|
|
3528 |
.IP "\fBdpi\fR \fIinteger\fR" 4 |
|
|
3529 |
.IX Item "dpi integer" |
|
|
3530 |
Set physical density of pixels, in dots per inch, unset by default |
|
|
3531 |
.IP "\fBdpm\fR \fIinteger\fR" 4 |
|
|
3532 |
.IX Item "dpm integer" |
|
|
3533 |
Set physical density of pixels, in dots per meter, unset by default |
|
|
3534 |
.Sh "ProRes" |
|
|
3535 |
.IX Subsection "ProRes" |
|
|
3536 |
Apple ProRes encoder. |
|
|
3537 |
.PP |
|
|
3538 |
FFmpeg contains 2 ProRes encoders, the prores-aw and prores-ks encoder. |
|
|
3539 |
The used encoder can be choosen with the \f(CW\*(C`\-vcodec\*(C'\fR option. |
|
|
3540 |
.PP |
|
|
3541 |
\fIPrivate Options for prores-ks\fR |
|
|
3542 |
.IX Subsection "Private Options for prores-ks" |
|
|
3543 |
.IP "\fBprofile\fR \fIinteger\fR" 4 |
|
|
3544 |
.IX Item "profile integer" |
|
|
3545 |
Select the ProRes profile to encode |
|
|
3546 |
.RS 4 |
|
|
3547 |
.IP "\fBproxy\fR" 4 |
|
|
3548 |
.IX Item "proxy" |
|
|
3549 |
.PD 0 |
|
|
3550 |
.IP "\fBlt\fR" 4 |
|
|
3551 |
.IX Item "lt" |
|
|
3552 |
.IP "\fBstandard\fR" 4 |
|
|
3553 |
.IX Item "standard" |
|
|
3554 |
.IP "\fBhq\fR" 4 |
|
|
3555 |
.IX Item "hq" |
|
|
3556 |
.IP "\fB4444\fR" 4 |
|
|
3557 |
.IX Item "4444" |
|
|
3558 |
.RE |
|
|
3559 |
.RS 4 |
|
|
3560 |
.RE |
|
|
3561 |
.IP "\fBquant_mat\fR \fIinteger\fR" 4 |
|
|
3562 |
.IX Item "quant_mat integer" |
|
|
3563 |
.PD |
|
|
3564 |
Select quantization matrix. |
|
|
3565 |
.RS 4 |
|
|
3566 |
.IP "\fBauto\fR" 4 |
|
|
3567 |
.IX Item "auto" |
|
|
3568 |
.PD 0 |
|
|
3569 |
.IP "\fBdefault\fR" 4 |
|
|
3570 |
.IX Item "default" |
|
|
3571 |
.IP "\fBproxy\fR" 4 |
|
|
3572 |
.IX Item "proxy" |
|
|
3573 |
.IP "\fBlt\fR" 4 |
|
|
3574 |
.IX Item "lt" |
|
|
3575 |
.IP "\fBstandard\fR" 4 |
|
|
3576 |
.IX Item "standard" |
|
|
3577 |
.IP "\fBhq\fR" 4 |
|
|
3578 |
.IX Item "hq" |
|
|
3579 |
.RE |
|
|
3580 |
.RS 4 |
|
|
3581 |
.PD |
|
|
3582 |
.Sp |
|
|
3583 |
If set to \fIauto\fR, the matrix matching the profile will be picked. |
|
|
3584 |
If not set, the matrix providing the highest quality, \fIdefault\fR, will be |
|
|
3585 |
picked. |
|
|
3586 |
.RE |
|
|
3587 |
.IP "\fBbits_per_mb\fR \fIinteger\fR" 4 |
|
|
3588 |
.IX Item "bits_per_mb integer" |
|
|
3589 |
How many bits to allot for coding one macroblock. Different profiles use |
|
|
3590 |
between 200 and 2400 bits per macroblock, the maximum is 8000. |
|
|
3591 |
.IP "\fBmbs_per_slice\fR \fIinteger\fR" 4 |
|
|
3592 |
.IX Item "mbs_per_slice integer" |
|
|
3593 |
Number of macroblocks in each slice (1\-8); the default value (8) |
|
|
3594 |
should be good in almost all situations. |
|
|
3595 |
.IP "\fBvendor\fR \fIstring\fR" 4 |
|
|
3596 |
.IX Item "vendor string" |
|
|
3597 |
Override the 4\-byte vendor \s-1ID\s0. |
|
|
3598 |
A custom vendor \s-1ID\s0 like \fIapl0\fR would claim the stream was produced by |
|
|
3599 |
the Apple encoder. |
|
|
3600 |
.IP "\fBalpha_bits\fR \fIinteger\fR" 4 |
|
|
3601 |
.IX Item "alpha_bits integer" |
|
|
3602 |
Specify number of bits for alpha component. |
|
|
3603 |
Possible values are \fI0\fR, \fI8\fR and \fI16\fR. |
|
|
3604 |
Use \fI0\fR to disable alpha plane coding. |
|
|
3605 |
.PP |
|
|
3606 |
\fISpeed considerations\fR |
|
|
3607 |
.IX Subsection "Speed considerations" |
|
|
3608 |
.PP |
|
|
3609 |
In the default mode of operation the encoder has to honor frame constraints |
|
|
3610 |
(i.e. not produc frames with size bigger than requested) while still making |
|
|
3611 |
output picture as good as possible. |
|
|
3612 |
A frame containing a lot of small details is harder to compress and the encoder |
|
|
3613 |
would spend more time searching for appropriate quantizers for each slice. |
|
|
3614 |
.PP |
|
|
3615 |
Setting a higher \fBbits_per_mb\fR limit will improve the speed. |
|
|
3616 |
.PP |
|
|
3617 |
For the fastest encoding speed set the \fBqscale\fR parameter (4 is the |
|
|
3618 |
recommended value) and do not set a size constraint. |
|
|
3619 |
.SH "SEE ALSO" |
|
|
3620 |
.IX Header "SEE ALSO" |
|
|
3621 |
\&\fIffmpeg\fR\|(1), \fIffplay\fR\|(1), \fIffprobe\fR\|(1), \fIffserver\fR\|(1), \fIlibavcodec\fR\|(3) |
|
|
3622 |
.SH "AUTHORS" |
|
|
3623 |
.IX Header "AUTHORS" |
|
|
3624 |
The FFmpeg developers. |
|
|
3625 |
.PP |
|
|
3626 |
For details about the authorship, see the Git history of the project |
|
|
3627 |
(git://source.ffmpeg.org/ffmpeg), e.g. by typing the command |
|
|
3628 |
\&\fBgit log\fR in the FFmpeg source directory, or browsing the |
|
|
3629 |
online repository at <\fBhttp://source.ffmpeg.org\fR>. |
|
|
3630 |
.PP |
|
|
3631 |
Maintainers for the specific components are listed in the file |
|
|
3632 |
\&\fI\s-1MAINTAINERS\s0\fR in the source code tree. |