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.\" ======================================================================== |
.\" |
.IX Title "FFMPEG-SCALER 1" |
.TH FFMPEG-SCALER 1 "2013-12-14" " " " " |
.SH "NAME" |
ffmpeg\-scaler \- FFmpeg video scaling and pixel format converter |
.SH "DESCRIPTION" |
.IX Header "DESCRIPTION" |
The FFmpeg rescaler provides a high-level interface to the libswscale |
library image conversion utilities. In particular it allows to perform |
image rescaling and pixel format conversion. |
.SH "SCALER OPTIONS" |
.IX Header "SCALER OPTIONS" |
The video scaler supports the following named options. |
.PP |
Options may be set by specifying \-\fIoption\fR \fIvalue\fR in the |
FFmpeg tools. For programmatic use, they can be set explicitly in the |
\&\f(CW\*(C`SwsContext\*(C'\fR options or through the \fIlibavutil/opt.h\fR \s-1API\s0. |
.IP "\fBsws_flags\fR" 4 |
.IX Item "sws_flags" |
Set the scaler flags. This is also used to set the scaling |
algorithm. Only a single algorithm should be selected. |
.Sp |
It accepts the following values: |
.RS 4 |
.IP "\fBfast_bilinear\fR" 4 |
.IX Item "fast_bilinear" |
Select fast bilinear scaling algorithm. |
.IP "\fBbilinear\fR" 4 |
.IX Item "bilinear" |
Select bilinear scaling algorithm. |
.IP "\fBbicubic\fR" 4 |
.IX Item "bicubic" |
Select bicubic scaling algorithm. |
.IP "\fBexperimental\fR" 4 |
.IX Item "experimental" |
Select experimental scaling algorithm. |
.IP "\fBneighbor\fR" 4 |
.IX Item "neighbor" |
Select nearest neighbor rescaling algorithm. |
.IP "\fBarea\fR" 4 |
.IX Item "area" |
Select averaging area rescaling algorithm. |
.IP "\fBbicubiclin\fR" 4 |
.IX Item "bicubiclin" |
Select bicubic scaling algorithm for the luma component, bilinear for |
chroma components. |
.IP "\fBgauss\fR" 4 |
.IX Item "gauss" |
Select Gaussian rescaling algorithm. |
.IP "\fBsinc\fR" 4 |
.IX Item "sinc" |
Select sinc rescaling algorithm. |
.IP "\fBlanczos\fR" 4 |
.IX Item "lanczos" |
Select lanczos rescaling algorithm. |
.IP "\fBspline\fR" 4 |
.IX Item "spline" |
Select natural bicubic spline rescaling algorithm. |
.IP "\fBprint_info\fR" 4 |
.IX Item "print_info" |
Enable printing/debug logging. |
.IP "\fBaccurate_rnd\fR" 4 |
.IX Item "accurate_rnd" |
Enable accurate rounding. |
.IP "\fBfull_chroma_int\fR" 4 |
.IX Item "full_chroma_int" |
Enable full chroma interpolation. |
.IP "\fBfull_chroma_inp\fR" 4 |
.IX Item "full_chroma_inp" |
Select full chroma input. |
.IP "\fBbitexact\fR" 4 |
.IX Item "bitexact" |
Enable bitexact output. |
.RE |
.RS 4 |
.RE |
.IP "\fBsrcw\fR" 4 |
.IX Item "srcw" |
Set source width. |
.IP "\fBsrch\fR" 4 |
.IX Item "srch" |
Set source height. |
.IP "\fBdstw\fR" 4 |
.IX Item "dstw" |
Set destination width. |
.IP "\fBdsth\fR" 4 |
.IX Item "dsth" |
Set destination height. |
.IP "\fBsrc_format\fR" 4 |
.IX Item "src_format" |
Set source pixel format (must be expressed as an integer). |
.IP "\fBdst_format\fR" 4 |
.IX Item "dst_format" |
Set destination pixel format (must be expressed as an integer). |
.IP "\fBsrc_range\fR" 4 |
.IX Item "src_range" |
Select source range. |
.IP "\fBdst_range\fR" 4 |
.IX Item "dst_range" |
Select destination range. |
.IP "\fBparam0, param1\fR" 4 |
.IX Item "param0, param1" |
Set scaling algorithm parameters. The specified values are specific of |
some scaling algorithms and ignored by others. The specified values |
are floating point number values. |
.IP "\fBsws_dither\fR" 4 |
.IX Item "sws_dither" |
Set the dithering algorithm. Accepts one of the following |
values. Default value is \fBauto\fR. |
.RS 4 |
.IP "\fBauto\fR" 4 |
.IX Item "auto" |
automatic choice |
.IP "\fBnone\fR" 4 |
.IX Item "none" |
no dithering |
.IP "\fBbayer\fR" 4 |
.IX Item "bayer" |
bayer dither |
.IP "\fBed\fR" 4 |
.IX Item "ed" |
error diffusion dither |
.RE |
.RS 4 |
.RE |
.SH "SEE ALSO" |
.IX Header "SEE ALSO" |
\&\fIffmpeg\fR\|(1), \fIffplay\fR\|(1), \fIffprobe\fR\|(1), \fIffserver\fR\|(1), \fIlibswscale\fR\|(3) |
.SH "AUTHORS" |
.IX Header "AUTHORS" |
The FFmpeg developers. |
.PP |
For details about the authorship, see the Git history of the project |
(git://source.ffmpeg.org/ffmpeg), e.g. by typing the command |
\&\fBgit log\fR in the FFmpeg source directory, or browsing the |
online repository at <\fBhttp://source.ffmpeg.org\fR>. |
.PP |
Maintainers for the specific components are listed in the file |
\&\fI\s-1MAINTAINERS\s0\fR in the source code tree. |