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  1. /*
  2.  * muxing functions for use within FFmpeg
  3.  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
  4.  *
  5.  * This file is part of FFmpeg.
  6.  *
  7.  * FFmpeg is free software; you can redistribute it and/or
  8.  * modify it under the terms of the GNU Lesser General Public
  9.  * License as published by the Free Software Foundation; either
  10.  * version 2.1 of the License, or (at your option) any later version.
  11.  *
  12.  * FFmpeg is distributed in the hope that it will be useful,
  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15.  * Lesser General Public License for more details.
  16.  *
  17.  * You should have received a copy of the GNU Lesser General Public
  18.  * License along with FFmpeg; if not, write to the Free Software
  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20.  */
  21.  
  22. #include "avformat.h"
  23. #include "avio_internal.h"
  24. #include "internal.h"
  25. #include "libavcodec/internal.h"
  26. #include "libavcodec/bytestream.h"
  27. #include "libavutil/opt.h"
  28. #include "libavutil/dict.h"
  29. #include "libavutil/pixdesc.h"
  30. #include "libavutil/timestamp.h"
  31. #include "metadata.h"
  32. #include "id3v2.h"
  33. #include "libavutil/avassert.h"
  34. #include "libavutil/avstring.h"
  35. #include "libavutil/internal.h"
  36. #include "libavutil/mathematics.h"
  37. #include "libavutil/parseutils.h"
  38. #include "libavutil/time.h"
  39. #include "riff.h"
  40. #include "audiointerleave.h"
  41. #include "url.h"
  42. #include <stdarg.h>
  43. #if CONFIG_NETWORK
  44. #include "network.h"
  45. #endif
  46.  
  47. /**
  48.  * @file
  49.  * muxing functions for use within libavformat
  50.  */
  51.  
  52. /* fraction handling */
  53.  
  54. /**
  55.  * f = val + (num / den) + 0.5.
  56.  *
  57.  * 'num' is normalized so that it is such as 0 <= num < den.
  58.  *
  59.  * @param f fractional number
  60.  * @param val integer value
  61.  * @param num must be >= 0
  62.  * @param den must be >= 1
  63.  */
  64. static void frac_init(FFFrac *f, int64_t val, int64_t num, int64_t den)
  65. {
  66.     num += (den >> 1);
  67.     if (num >= den) {
  68.         val += num / den;
  69.         num  = num % den;
  70.     }
  71.     f->val = val;
  72.     f->num = num;
  73.     f->den = den;
  74. }
  75.  
  76. /**
  77.  * Fractional addition to f: f = f + (incr / f->den).
  78.  *
  79.  * @param f fractional number
  80.  * @param incr increment, can be positive or negative
  81.  */
  82. static void frac_add(FFFrac *f, int64_t incr)
  83. {
  84.     int64_t num, den;
  85.  
  86.     num = f->num + incr;
  87.     den = f->den;
  88.     if (num < 0) {
  89.         f->val += num / den;
  90.         num     = num % den;
  91.         if (num < 0) {
  92.             num += den;
  93.             f->val--;
  94.         }
  95.     } else if (num >= den) {
  96.         f->val += num / den;
  97.         num     = num % den;
  98.     }
  99.     f->num = num;
  100. }
  101.  
  102. AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision)
  103. {
  104.     AVRational q;
  105.     int j;
  106.  
  107.     q = st->time_base;
  108.  
  109.     for (j=2; j<14; j+= 1+(j>2))
  110.         while (q.den / q.num < min_precision && q.num % j == 0)
  111.             q.num /= j;
  112.     while (q.den / q.num < min_precision && q.den < (1<<24))
  113.         q.den <<= 1;
  114.  
  115.     return q;
  116. }
  117.  
  118. enum AVChromaLocation ff_choose_chroma_location(AVFormatContext *s, AVStream *st)
  119. {
  120.     AVCodecContext *avctx = st->codec;
  121.     const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(avctx->pix_fmt);
  122.  
  123.     if (avctx->chroma_sample_location != AVCHROMA_LOC_UNSPECIFIED)
  124.         return avctx->chroma_sample_location;
  125.  
  126.     if (pix_desc) {
  127.         if (pix_desc->log2_chroma_h == 0) {
  128.             return AVCHROMA_LOC_TOPLEFT;
  129.         } else if (pix_desc->log2_chroma_w == 1 && pix_desc->log2_chroma_h == 1) {
  130.             if (avctx->field_order == AV_FIELD_UNKNOWN || avctx->field_order == AV_FIELD_PROGRESSIVE) {
  131.                 switch (avctx->codec_id) {
  132.                 case AV_CODEC_ID_MJPEG:
  133.                 case AV_CODEC_ID_MPEG1VIDEO: return AVCHROMA_LOC_CENTER;
  134.                 }
  135.             }
  136.             if (avctx->field_order == AV_FIELD_UNKNOWN || avctx->field_order != AV_FIELD_PROGRESSIVE) {
  137.                 switch (avctx->codec_id) {
  138.                 case AV_CODEC_ID_MPEG2VIDEO: return AVCHROMA_LOC_LEFT;
  139.                 }
  140.             }
  141.         }
  142.     }
  143.  
  144.     return AVCHROMA_LOC_UNSPECIFIED;
  145.  
  146. }
  147.  
  148. int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat,
  149.                                    const char *format, const char *filename)
  150. {
  151.     AVFormatContext *s = avformat_alloc_context();
  152.     int ret = 0;
  153.  
  154.     *avctx = NULL;
  155.     if (!s)
  156.         goto nomem;
  157.  
  158.     if (!oformat) {
  159.         if (format) {
  160.             oformat = av_guess_format(format, NULL, NULL);
  161.             if (!oformat) {
  162.                 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
  163.                 ret = AVERROR(EINVAL);
  164.                 goto error;
  165.             }
  166.         } else {
  167.             oformat = av_guess_format(NULL, filename, NULL);
  168.             if (!oformat) {
  169.                 ret = AVERROR(EINVAL);
  170.                 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
  171.                        filename);
  172.                 goto error;
  173.             }
  174.         }
  175.     }
  176.  
  177.     s->oformat = oformat;
  178.     if (s->oformat->priv_data_size > 0) {
  179.         s->priv_data = av_mallocz(s->oformat->priv_data_size);
  180.         if (!s->priv_data)
  181.             goto nomem;
  182.         if (s->oformat->priv_class) {
  183.             *(const AVClass**)s->priv_data= s->oformat->priv_class;
  184.             av_opt_set_defaults(s->priv_data);
  185.         }
  186.     } else
  187.         s->priv_data = NULL;
  188.  
  189.     if (filename)
  190.         av_strlcpy(s->filename, filename, sizeof(s->filename));
  191.     *avctx = s;
  192.     return 0;
  193. nomem:
  194.     av_log(s, AV_LOG_ERROR, "Out of memory\n");
  195.     ret = AVERROR(ENOMEM);
  196. error:
  197.     avformat_free_context(s);
  198.     return ret;
  199. }
  200.  
  201. static int validate_codec_tag(AVFormatContext *s, AVStream *st)
  202. {
  203.     const AVCodecTag *avctag;
  204.     int n;
  205.     enum AVCodecID id = AV_CODEC_ID_NONE;
  206.     int64_t tag  = -1;
  207.  
  208.     /**
  209.      * Check that tag + id is in the table
  210.      * If neither is in the table -> OK
  211.      * If tag is in the table with another id -> FAIL
  212.      * If id is in the table with another tag -> FAIL unless strict < normal
  213.      */
  214.     for (n = 0; s->oformat->codec_tag[n]; n++) {
  215.         avctag = s->oformat->codec_tag[n];
  216.         while (avctag->id != AV_CODEC_ID_NONE) {
  217.             if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
  218.                 id = avctag->id;
  219.                 if (id == st->codec->codec_id)
  220.                     return 1;
  221.             }
  222.             if (avctag->id == st->codec->codec_id)
  223.                 tag = avctag->tag;
  224.             avctag++;
  225.         }
  226.     }
  227.     if (id != AV_CODEC_ID_NONE)
  228.         return 0;
  229.     if (tag >= 0 && (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
  230.         return 0;
  231.     return 1;
  232. }
  233.  
  234.  
  235. static int init_muxer(AVFormatContext *s, AVDictionary **options)
  236. {
  237.     int ret = 0, i;
  238.     AVStream *st;
  239.     AVDictionary *tmp = NULL;
  240.     AVCodecContext *codec = NULL;
  241.     AVOutputFormat *of = s->oformat;
  242.     AVDictionaryEntry *e;
  243.  
  244.     if (options)
  245.         av_dict_copy(&tmp, *options, 0);
  246.  
  247.     if ((ret = av_opt_set_dict(s, &tmp)) < 0)
  248.         goto fail;
  249.     if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
  250.         (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
  251.         goto fail;
  252.  
  253.     if (s->nb_streams && s->streams[0]->codec->flags & AV_CODEC_FLAG_BITEXACT) {
  254.         if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
  255. #if FF_API_LAVF_BITEXACT
  256.             av_log(s, AV_LOG_WARNING,
  257.                    "Setting the AVFormatContext to bitexact mode, because "
  258.                    "the AVCodecContext is in that mode. This behavior will "
  259.                    "change in the future. To keep the current behavior, set "
  260.                    "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
  261.             s->flags |= AVFMT_FLAG_BITEXACT;
  262. #else
  263.             av_log(s, AV_LOG_WARNING,
  264.                    "The AVFormatContext is not in set to bitexact mode, only "
  265.                    "the AVCodecContext. If this is not intended, set "
  266.                    "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
  267. #endif
  268.         }
  269.     }
  270.  
  271.     // some sanity checks
  272.     if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
  273.         av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
  274.         ret = AVERROR(EINVAL);
  275.         goto fail;
  276.     }
  277.  
  278.     for (i = 0; i < s->nb_streams; i++) {
  279.         st    = s->streams[i];
  280.         codec = st->codec;
  281.  
  282. #if FF_API_LAVF_CODEC_TB
  283. FF_DISABLE_DEPRECATION_WARNINGS
  284.         if (!st->time_base.num && codec->time_base.num) {
  285.             av_log(s, AV_LOG_WARNING, "Using AVStream.codec.time_base as a "
  286.                    "timebase hint to the muxer is deprecated. Set "
  287.                    "AVStream.time_base instead.\n");
  288.             avpriv_set_pts_info(st, 64, codec->time_base.num, codec->time_base.den);
  289.         }
  290. FF_ENABLE_DEPRECATION_WARNINGS
  291. #endif
  292.  
  293.         if (!st->time_base.num) {
  294.             /* fall back on the default timebase values */
  295.             if (codec->codec_type == AVMEDIA_TYPE_AUDIO && codec->sample_rate)
  296.                 avpriv_set_pts_info(st, 64, 1, codec->sample_rate);
  297.             else
  298.                 avpriv_set_pts_info(st, 33, 1, 90000);
  299.         }
  300.  
  301.         switch (codec->codec_type) {
  302.         case AVMEDIA_TYPE_AUDIO:
  303.             if (codec->sample_rate <= 0) {
  304.                 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
  305.                 ret = AVERROR(EINVAL);
  306.                 goto fail;
  307.             }
  308.             if (!codec->block_align)
  309.                 codec->block_align = codec->channels *
  310.                                      av_get_bits_per_sample(codec->codec_id) >> 3;
  311.             break;
  312.         case AVMEDIA_TYPE_VIDEO:
  313.             if ((codec->width <= 0 || codec->height <= 0) &&
  314.                 !(of->flags & AVFMT_NODIMENSIONS)) {
  315.                 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
  316.                 ret = AVERROR(EINVAL);
  317.                 goto fail;
  318.             }
  319.             if (av_cmp_q(st->sample_aspect_ratio, codec->sample_aspect_ratio)
  320.                 && FFABS(av_q2d(st->sample_aspect_ratio) - av_q2d(codec->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
  321.             ) {
  322.                 if (st->sample_aspect_ratio.num != 0 &&
  323.                     st->sample_aspect_ratio.den != 0 &&
  324.                     codec->sample_aspect_ratio.num != 0 &&
  325.                     codec->sample_aspect_ratio.den != 0) {
  326.                     av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
  327.                            "(%d/%d) and encoder layer (%d/%d)\n",
  328.                            st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
  329.                            codec->sample_aspect_ratio.num,
  330.                            codec->sample_aspect_ratio.den);
  331.                     ret = AVERROR(EINVAL);
  332.                     goto fail;
  333.                 }
  334.             }
  335.             break;
  336.         }
  337.  
  338.         if (of->codec_tag) {
  339.             if (   codec->codec_tag
  340.                 && codec->codec_id == AV_CODEC_ID_RAWVIDEO
  341.                 && (   av_codec_get_tag(of->codec_tag, codec->codec_id) == 0
  342.                     || av_codec_get_tag(of->codec_tag, codec->codec_id) == MKTAG('r', 'a', 'w', ' '))
  343.                 && !validate_codec_tag(s, st)) {
  344.                 // the current rawvideo encoding system ends up setting
  345.                 // the wrong codec_tag for avi/mov, we override it here
  346.                 codec->codec_tag = 0;
  347.             }
  348.             if (codec->codec_tag) {
  349.                 if (!validate_codec_tag(s, st)) {
  350.                     char tagbuf[32], tagbuf2[32];
  351.                     av_get_codec_tag_string(tagbuf, sizeof(tagbuf), codec->codec_tag);
  352.                     av_get_codec_tag_string(tagbuf2, sizeof(tagbuf2), av_codec_get_tag(s->oformat->codec_tag, codec->codec_id));
  353.                     av_log(s, AV_LOG_ERROR,
  354.                            "Tag %s/0x%08x incompatible with output codec id '%d' (%s)\n",
  355.                            tagbuf, codec->codec_tag, codec->codec_id, tagbuf2);
  356.                     ret = AVERROR_INVALIDDATA;
  357.                     goto fail;
  358.                 }
  359.             } else
  360.                 codec->codec_tag = av_codec_get_tag(of->codec_tag, codec->codec_id);
  361.         }
  362.  
  363.         if (of->flags & AVFMT_GLOBALHEADER &&
  364.             !(codec->flags & AV_CODEC_FLAG_GLOBAL_HEADER))
  365.             av_log(s, AV_LOG_WARNING,
  366.                    "Codec for stream %d does not use global headers "
  367.                    "but container format requires global headers\n", i);
  368.  
  369.         if (codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
  370.             s->internal->nb_interleaved_streams++;
  371.     }
  372.  
  373.     if (!s->priv_data && of->priv_data_size > 0) {
  374.         s->priv_data = av_mallocz(of->priv_data_size);
  375.         if (!s->priv_data) {
  376.             ret = AVERROR(ENOMEM);
  377.             goto fail;
  378.         }
  379.         if (of->priv_class) {
  380.             *(const AVClass **)s->priv_data = of->priv_class;
  381.             av_opt_set_defaults(s->priv_data);
  382.             if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
  383.                 goto fail;
  384.         }
  385.     }
  386.  
  387.     /* set muxer identification string */
  388.     if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
  389.         av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
  390.     } else {
  391.         av_dict_set(&s->metadata, "encoder", NULL, 0);
  392.     }
  393.  
  394.     for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
  395.         av_dict_set(&s->metadata, e->key, NULL, 0);
  396.     }
  397.  
  398.     if (options) {
  399.          av_dict_free(options);
  400.          *options = tmp;
  401.     }
  402.  
  403.     return 0;
  404.  
  405. fail:
  406.     av_dict_free(&tmp);
  407.     return ret;
  408. }
  409.  
  410. static int init_pts(AVFormatContext *s)
  411. {
  412.     int i;
  413.     AVStream *st;
  414.  
  415.     /* init PTS generation */
  416.     for (i = 0; i < s->nb_streams; i++) {
  417.         int64_t den = AV_NOPTS_VALUE;
  418.         st = s->streams[i];
  419.  
  420.         switch (st->codec->codec_type) {
  421.         case AVMEDIA_TYPE_AUDIO:
  422.             den = (int64_t)st->time_base.num * st->codec->sample_rate;
  423.             break;
  424.         case AVMEDIA_TYPE_VIDEO:
  425.             den = (int64_t)st->time_base.num * st->codec->time_base.den;
  426.             break;
  427.         default:
  428.             break;
  429.         }
  430.  
  431.         if (!st->priv_pts)
  432.             st->priv_pts = av_mallocz(sizeof(*st->priv_pts));
  433.         if (!st->priv_pts)
  434.             return AVERROR(ENOMEM);
  435.  
  436.         if (den != AV_NOPTS_VALUE) {
  437.             if (den <= 0)
  438.                 return AVERROR_INVALIDDATA;
  439.  
  440.             frac_init(st->priv_pts, 0, 0, den);
  441.         }
  442.     }
  443.  
  444.     return 0;
  445. }
  446.  
  447. int avformat_write_header(AVFormatContext *s, AVDictionary **options)
  448. {
  449.     int ret = 0;
  450.  
  451.     if ((ret = init_muxer(s, options)) < 0)
  452.         return ret;
  453.  
  454.     if (s->oformat->write_header) {
  455.         ret = s->oformat->write_header(s);
  456.         if (ret >= 0 && s->pb && s->pb->error < 0)
  457.             ret = s->pb->error;
  458.         if (ret < 0)
  459.             return ret;
  460.         if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
  461.             avio_flush(s->pb);
  462.     }
  463.  
  464.     if ((ret = init_pts(s)) < 0)
  465.         return ret;
  466.  
  467.     if (s->avoid_negative_ts < 0) {
  468.         av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
  469.         if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
  470.             s->avoid_negative_ts = 0;
  471.         } else
  472.             s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
  473.     }
  474.  
  475.     return 0;
  476. }
  477.  
  478. #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
  479.  
  480. /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
  481.    it is only being used internally to this file as a consistency check.
  482.    The value is chosen to be very unlikely to appear on its own and to cause
  483.    immediate failure if used anywhere as a real size. */
  484. #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
  485.  
  486.  
  487. //FIXME merge with compute_pkt_fields
  488. static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt)
  489. {
  490.     int delay = FFMAX(st->codec->has_b_frames, st->codec->max_b_frames > 0);
  491.     int num, den, i;
  492.     int frame_size;
  493.  
  494.     if (s->debug & FF_FDEBUG_TS)
  495.         av_log(s, AV_LOG_TRACE, "compute_pkt_fields2: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
  496.             av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
  497.  
  498.     if (pkt->duration < 0 && st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
  499.         av_log(s, AV_LOG_WARNING, "Packet with invalid duration %d in stream %d\n",
  500.                pkt->duration, pkt->stream_index);
  501.         pkt->duration = 0;
  502.     }
  503.  
  504.     /* duration field */
  505.     if (pkt->duration == 0) {
  506.         ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
  507.         if (den && num) {
  508.             pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
  509.         }
  510.     }
  511.  
  512.     if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
  513.         pkt->pts = pkt->dts;
  514.  
  515.     //XXX/FIXME this is a temporary hack until all encoders output pts
  516.     if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
  517.         static int warned;
  518.         if (!warned) {
  519.             av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
  520.             warned = 1;
  521.         }
  522.         pkt->dts =
  523. //        pkt->pts= st->cur_dts;
  524.             pkt->pts = st->priv_pts->val;
  525.     }
  526.  
  527.     //calculate dts from pts
  528.     if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
  529.         st->pts_buffer[0] = pkt->pts;
  530.         for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
  531.             st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
  532.         for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
  533.             FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
  534.  
  535.         pkt->dts = st->pts_buffer[0];
  536.     }
  537.  
  538.     if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
  539.         ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
  540.           st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE &&
  541.           st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
  542.         av_log(s, AV_LOG_ERROR,
  543.                "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
  544.                st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
  545.         return AVERROR(EINVAL);
  546.     }
  547.     if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
  548.         av_log(s, AV_LOG_ERROR,
  549.                "pts (%s) < dts (%s) in stream %d\n",
  550.                av_ts2str(pkt->pts), av_ts2str(pkt->dts),
  551.                st->index);
  552.         return AVERROR(EINVAL);
  553.     }
  554.  
  555.     if (s->debug & FF_FDEBUG_TS)
  556.         av_log(s, AV_LOG_TRACE, "av_write_frame: pts2:%s dts2:%s\n",
  557.             av_ts2str(pkt->pts), av_ts2str(pkt->dts));
  558.  
  559.     st->cur_dts = pkt->dts;
  560.     st->priv_pts->val = pkt->dts;
  561.  
  562.     /* update pts */
  563.     switch (st->codec->codec_type) {
  564.     case AVMEDIA_TYPE_AUDIO:
  565.         frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
  566.                      ((AVFrame *)pkt->data)->nb_samples :
  567.                      av_get_audio_frame_duration(st->codec, pkt->size);
  568.  
  569.         /* HACK/FIXME, we skip the initial 0 size packets as they are most
  570.          * likely equal to the encoder delay, but it would be better if we
  571.          * had the real timestamps from the encoder */
  572.         if (frame_size >= 0 && (pkt->size || st->priv_pts->num != st->priv_pts->den >> 1 || st->priv_pts->val)) {
  573.             frac_add(st->priv_pts, (int64_t)st->time_base.den * frame_size);
  574.         }
  575.         break;
  576.     case AVMEDIA_TYPE_VIDEO:
  577.         frac_add(st->priv_pts, (int64_t)st->time_base.den * st->codec->time_base.num);
  578.         break;
  579.     }
  580.     return 0;
  581. }
  582.  
  583. /**
  584.  * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
  585.  * sidedata.
  586.  *
  587.  * FIXME: this function should NEVER get undefined pts/dts beside when the
  588.  * AVFMT_NOTIMESTAMPS is set.
  589.  * Those additional safety checks should be dropped once the correct checks
  590.  * are set in the callers.
  591.  */
  592. static int write_packet(AVFormatContext *s, AVPacket *pkt)
  593. {
  594.     int ret, did_split;
  595.  
  596.     if (s->output_ts_offset) {
  597.         AVStream *st = s->streams[pkt->stream_index];
  598.         int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
  599.  
  600.         if (pkt->dts != AV_NOPTS_VALUE)
  601.             pkt->dts += offset;
  602.         if (pkt->pts != AV_NOPTS_VALUE)
  603.             pkt->pts += offset;
  604.     }
  605.  
  606.     if (s->avoid_negative_ts > 0) {
  607.         AVStream *st = s->streams[pkt->stream_index];
  608.         int64_t offset = st->mux_ts_offset;
  609.         int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
  610.  
  611.         if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
  612.             (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
  613.             s->internal->offset = -ts;
  614.             s->internal->offset_timebase = st->time_base;
  615.         }
  616.  
  617.         if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
  618.             offset = st->mux_ts_offset =
  619.                 av_rescale_q_rnd(s->internal->offset,
  620.                                  s->internal->offset_timebase,
  621.                                  st->time_base,
  622.                                  AV_ROUND_UP);
  623.         }
  624.  
  625.         if (pkt->dts != AV_NOPTS_VALUE)
  626.             pkt->dts += offset;
  627.         if (pkt->pts != AV_NOPTS_VALUE)
  628.             pkt->pts += offset;
  629.  
  630.         if (s->internal->avoid_negative_ts_use_pts) {
  631.             if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
  632.                 av_log(s, AV_LOG_WARNING, "failed to avoid negative "
  633.                     "pts %s in stream %d.\n"
  634.                     "Try -avoid_negative_ts 1 as a possible workaround.\n",
  635.                     av_ts2str(pkt->dts),
  636.                     pkt->stream_index
  637.                 );
  638.             }
  639.         } else {
  640.             av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
  641.             if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
  642.                 av_log(s, AV_LOG_WARNING,
  643.                     "Packets poorly interleaved, failed to avoid negative "
  644.                     "timestamp %s in stream %d.\n"
  645.                     "Try -max_interleave_delta 0 as a possible workaround.\n",
  646.                     av_ts2str(pkt->dts),
  647.                     pkt->stream_index
  648.                 );
  649.             }
  650.         }
  651.     }
  652.  
  653.     did_split = av_packet_split_side_data(pkt);
  654.     if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
  655.         AVFrame *frame = (AVFrame *)pkt->data;
  656.         av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
  657.         ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
  658.         av_frame_free(&frame);
  659.     } else {
  660.         ret = s->oformat->write_packet(s, pkt);
  661.     }
  662.  
  663.     if (s->flush_packets && s->pb && ret >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
  664.         avio_flush(s->pb);
  665.  
  666.     if (did_split)
  667.         av_packet_merge_side_data(pkt);
  668.  
  669.     return ret;
  670. }
  671.  
  672. static int check_packet(AVFormatContext *s, AVPacket *pkt)
  673. {
  674.     if (!pkt)
  675.         return 0;
  676.  
  677.     if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
  678.         av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
  679.                pkt->stream_index);
  680.         return AVERROR(EINVAL);
  681.     }
  682.  
  683.     if (s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
  684.         av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
  685.         return AVERROR(EINVAL);
  686.     }
  687.  
  688.     return 0;
  689. }
  690.  
  691. int av_write_frame(AVFormatContext *s, AVPacket *pkt)
  692. {
  693.     int ret;
  694.  
  695.     ret = check_packet(s, pkt);
  696.     if (ret < 0)
  697.         return ret;
  698.  
  699.     if (!pkt) {
  700.         if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
  701.             ret = s->oformat->write_packet(s, NULL);
  702.             if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
  703.                 avio_flush(s->pb);
  704.             if (ret >= 0 && s->pb && s->pb->error < 0)
  705.                 ret = s->pb->error;
  706.             return ret;
  707.         }
  708.         return 1;
  709.     }
  710.  
  711.     ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
  712.  
  713.     if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
  714.         return ret;
  715.  
  716.     ret = write_packet(s, pkt);
  717.     if (ret >= 0 && s->pb && s->pb->error < 0)
  718.         ret = s->pb->error;
  719.  
  720.     if (ret >= 0)
  721.         s->streams[pkt->stream_index]->nb_frames++;
  722.     return ret;
  723. }
  724.  
  725. #define CHUNK_START 0x1000
  726.  
  727. int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
  728.                              int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
  729. {
  730.     int ret;
  731.     AVPacketList **next_point, *this_pktl;
  732.     AVStream *st   = s->streams[pkt->stream_index];
  733.     int chunked    = s->max_chunk_size || s->max_chunk_duration;
  734.  
  735.     this_pktl      = av_mallocz(sizeof(AVPacketList));
  736.     if (!this_pktl)
  737.         return AVERROR(ENOMEM);
  738.     this_pktl->pkt = *pkt;
  739. #if FF_API_DESTRUCT_PACKET
  740. FF_DISABLE_DEPRECATION_WARNINGS
  741.     pkt->destruct  = NULL;           // do not free original but only the copy
  742. FF_ENABLE_DEPRECATION_WARNINGS
  743. #endif
  744.     pkt->buf       = NULL;
  745.     pkt->side_data = NULL;
  746.     pkt->side_data_elems = 0;
  747.     if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
  748.         av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
  749.         av_assert0(((AVFrame *)pkt->data)->buf);
  750.     } else {
  751.         // Duplicate the packet if it uses non-allocated memory
  752.         if ((ret = av_dup_packet(&this_pktl->pkt)) < 0) {
  753.             av_free(this_pktl);
  754.             return ret;
  755.         }
  756.     }
  757.  
  758.     if (s->streams[pkt->stream_index]->last_in_packet_buffer) {
  759.         next_point = &(st->last_in_packet_buffer->next);
  760.     } else {
  761.         next_point = &s->internal->packet_buffer;
  762.     }
  763.  
  764.     if (chunked) {
  765.         uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
  766.         st->interleaver_chunk_size     += pkt->size;
  767.         st->interleaver_chunk_duration += pkt->duration;
  768.         if (   (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size)
  769.             || (max && st->interleaver_chunk_duration           > max)) {
  770.             st->interleaver_chunk_size      = 0;
  771.             this_pktl->pkt.flags |= CHUNK_START;
  772.             if (max && st->interleaver_chunk_duration > max) {
  773.                 int64_t syncoffset = (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
  774.                 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
  775.  
  776.                 st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
  777.             } else
  778.                 st->interleaver_chunk_duration = 0;
  779.         }
  780.     }
  781.     if (*next_point) {
  782.         if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
  783.             goto next_non_null;
  784.  
  785.         if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
  786.             while (   *next_point
  787.                    && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
  788.                        || !compare(s, &(*next_point)->pkt, pkt)))
  789.                 next_point = &(*next_point)->next;
  790.             if (*next_point)
  791.                 goto next_non_null;
  792.         } else {
  793.             next_point = &(s->internal->packet_buffer_end->next);
  794.         }
  795.     }
  796.     av_assert1(!*next_point);
  797.  
  798.     s->internal->packet_buffer_end = this_pktl;
  799. next_non_null:
  800.  
  801.     this_pktl->next = *next_point;
  802.  
  803.     s->streams[pkt->stream_index]->last_in_packet_buffer =
  804.         *next_point                                      = this_pktl;
  805.  
  806.     return 0;
  807. }
  808.  
  809. static int interleave_compare_dts(AVFormatContext *s, AVPacket *next,
  810.                                   AVPacket *pkt)
  811. {
  812.     AVStream *st  = s->streams[pkt->stream_index];
  813.     AVStream *st2 = s->streams[next->stream_index];
  814.     int comp      = av_compare_ts(next->dts, st2->time_base, pkt->dts,
  815.                                   st->time_base);
  816.     if (s->audio_preload && ((st->codec->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codec->codec_type == AVMEDIA_TYPE_AUDIO))) {
  817.         int64_t ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO);
  818.         int64_t ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO);
  819.         if (ts == ts2) {
  820.             ts= ( pkt ->dts* st->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO)* st->time_base.den)*st2->time_base.den
  821.                -( next->dts*st2->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO)*st2->time_base.den)* st->time_base.den;
  822.             ts2=0;
  823.         }
  824.         comp= (ts>ts2) - (ts<ts2);
  825.     }
  826.  
  827.     if (comp == 0)
  828.         return pkt->stream_index < next->stream_index;
  829.     return comp > 0;
  830. }
  831.  
  832. int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
  833.                                  AVPacket *pkt, int flush)
  834. {
  835.     AVPacketList *pktl;
  836.     int stream_count = 0;
  837.     int noninterleaved_count = 0;
  838.     int i, ret;
  839.  
  840.     if (pkt) {
  841.         if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
  842.             return ret;
  843.     }
  844.  
  845.     for (i = 0; i < s->nb_streams; i++) {
  846.         if (s->streams[i]->last_in_packet_buffer) {
  847.             ++stream_count;
  848.         } else if (s->streams[i]->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
  849.                    s->streams[i]->codec->codec_id != AV_CODEC_ID_VP8 &&
  850.                    s->streams[i]->codec->codec_id != AV_CODEC_ID_VP9) {
  851.             ++noninterleaved_count;
  852.         }
  853.     }
  854.  
  855.     if (s->internal->nb_interleaved_streams == stream_count)
  856.         flush = 1;
  857.  
  858.     if (s->max_interleave_delta > 0 &&
  859.         s->internal->packet_buffer &&
  860.         !flush &&
  861.         s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
  862.     ) {
  863.         AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
  864.         int64_t delta_dts = INT64_MIN;
  865.         int64_t top_dts = av_rescale_q(top_pkt->dts,
  866.                                        s->streams[top_pkt->stream_index]->time_base,
  867.                                        AV_TIME_BASE_Q);
  868.  
  869.         for (i = 0; i < s->nb_streams; i++) {
  870.             int64_t last_dts;
  871.             const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
  872.  
  873.             if (!last)
  874.                 continue;
  875.  
  876.             last_dts = av_rescale_q(last->pkt.dts,
  877.                                     s->streams[i]->time_base,
  878.                                     AV_TIME_BASE_Q);
  879.             delta_dts = FFMAX(delta_dts, last_dts - top_dts);
  880.         }
  881.  
  882.         if (delta_dts > s->max_interleave_delta) {
  883.             av_log(s, AV_LOG_DEBUG,
  884.                    "Delay between the first packet and last packet in the "
  885.                    "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
  886.                    delta_dts, s->max_interleave_delta);
  887.             flush = 1;
  888.         }
  889.     }
  890.  
  891.     if (stream_count && flush) {
  892.         AVStream *st;
  893.         pktl = s->internal->packet_buffer;
  894.         *out = pktl->pkt;
  895.         st   = s->streams[out->stream_index];
  896.  
  897.         s->internal->packet_buffer = pktl->next;
  898.         if (!s->internal->packet_buffer)
  899.             s->internal->packet_buffer_end = NULL;
  900.  
  901.         if (st->last_in_packet_buffer == pktl)
  902.             st->last_in_packet_buffer = NULL;
  903.         av_freep(&pktl);
  904.  
  905.         return 1;
  906.     } else {
  907.         av_init_packet(out);
  908.         return 0;
  909.     }
  910. }
  911.  
  912. /**
  913.  * Interleave an AVPacket correctly so it can be muxed.
  914.  * @param out the interleaved packet will be output here
  915.  * @param in the input packet
  916.  * @param flush 1 if no further packets are available as input and all
  917.  *              remaining packets should be output
  918.  * @return 1 if a packet was output, 0 if no packet could be output,
  919.  *         < 0 if an error occurred
  920.  */
  921. static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
  922. {
  923.     if (s->oformat->interleave_packet) {
  924.         int ret = s->oformat->interleave_packet(s, out, in, flush);
  925.         if (in)
  926.             av_free_packet(in);
  927.         return ret;
  928.     } else
  929.         return ff_interleave_packet_per_dts(s, out, in, flush);
  930. }
  931.  
  932. int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
  933. {
  934.     int ret, flush = 0;
  935.  
  936.     ret = check_packet(s, pkt);
  937.     if (ret < 0)
  938.         goto fail;
  939.  
  940.     if (pkt) {
  941.         AVStream *st = s->streams[pkt->stream_index];
  942.  
  943.         if (s->debug & FF_FDEBUG_TS)
  944.             av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
  945.                 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
  946.  
  947.         if ((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
  948.             goto fail;
  949.  
  950.         if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
  951.             ret = AVERROR(EINVAL);
  952.             goto fail;
  953.         }
  954.     } else {
  955.         av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
  956.         flush = 1;
  957.     }
  958.  
  959.     for (;; ) {
  960.         AVPacket opkt;
  961.         int ret = interleave_packet(s, &opkt, pkt, flush);
  962.         if (pkt) {
  963.             memset(pkt, 0, sizeof(*pkt));
  964.             av_init_packet(pkt);
  965.             pkt = NULL;
  966.         }
  967.         if (ret <= 0) //FIXME cleanup needed for ret<0 ?
  968.             return ret;
  969.  
  970.         ret = write_packet(s, &opkt);
  971.         if (ret >= 0)
  972.             s->streams[opkt.stream_index]->nb_frames++;
  973.  
  974.         av_free_packet(&opkt);
  975.  
  976.         if (ret < 0)
  977.             return ret;
  978.         if(s->pb && s->pb->error)
  979.             return s->pb->error;
  980.     }
  981. fail:
  982.     av_packet_unref(pkt);
  983.     return ret;
  984. }
  985.  
  986. int av_write_trailer(AVFormatContext *s)
  987. {
  988.     int ret, i;
  989.  
  990.     for (;; ) {
  991.         AVPacket pkt;
  992.         ret = interleave_packet(s, &pkt, NULL, 1);
  993.         if (ret < 0)
  994.             goto fail;
  995.         if (!ret)
  996.             break;
  997.  
  998.         ret = write_packet(s, &pkt);
  999.         if (ret >= 0)
  1000.             s->streams[pkt.stream_index]->nb_frames++;
  1001.  
  1002.         av_free_packet(&pkt);
  1003.  
  1004.         if (ret < 0)
  1005.             goto fail;
  1006.         if(s->pb && s->pb->error)
  1007.             goto fail;
  1008.     }
  1009.  
  1010. fail:
  1011.     if (s->oformat->write_trailer)
  1012.         if (ret >= 0) {
  1013.         ret = s->oformat->write_trailer(s);
  1014.         } else {
  1015.             s->oformat->write_trailer(s);
  1016.         }
  1017.  
  1018.     if (s->pb)
  1019.        avio_flush(s->pb);
  1020.     if (ret == 0)
  1021.        ret = s->pb ? s->pb->error : 0;
  1022.     for (i = 0; i < s->nb_streams; i++) {
  1023.         av_freep(&s->streams[i]->priv_data);
  1024.         av_freep(&s->streams[i]->index_entries);
  1025.     }
  1026.     if (s->oformat->priv_class)
  1027.         av_opt_free(s->priv_data);
  1028.     av_freep(&s->priv_data);
  1029.     return ret;
  1030. }
  1031.  
  1032. int av_get_output_timestamp(struct AVFormatContext *s, int stream,
  1033.                             int64_t *dts, int64_t *wall)
  1034. {
  1035.     if (!s->oformat || !s->oformat->get_output_timestamp)
  1036.         return AVERROR(ENOSYS);
  1037.     s->oformat->get_output_timestamp(s, stream, dts, wall);
  1038.     return 0;
  1039. }
  1040.  
  1041. int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
  1042.                      AVFormatContext *src, int interleave)
  1043. {
  1044.     AVPacket local_pkt;
  1045.     int ret;
  1046.  
  1047.     local_pkt = *pkt;
  1048.     local_pkt.stream_index = dst_stream;
  1049.     if (pkt->pts != AV_NOPTS_VALUE)
  1050.         local_pkt.pts = av_rescale_q(pkt->pts,
  1051.                                      src->streams[pkt->stream_index]->time_base,
  1052.                                      dst->streams[dst_stream]->time_base);
  1053.     if (pkt->dts != AV_NOPTS_VALUE)
  1054.         local_pkt.dts = av_rescale_q(pkt->dts,
  1055.                                      src->streams[pkt->stream_index]->time_base,
  1056.                                      dst->streams[dst_stream]->time_base);
  1057.     if (pkt->duration)
  1058.         local_pkt.duration = av_rescale_q(pkt->duration,
  1059.                                           src->streams[pkt->stream_index]->time_base,
  1060.                                           dst->streams[dst_stream]->time_base);
  1061.  
  1062.     if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
  1063.     else            ret = av_write_frame(dst, &local_pkt);
  1064.     pkt->buf = local_pkt.buf;
  1065.     pkt->side_data       = local_pkt.side_data;
  1066.     pkt->side_data_elems = local_pkt.side_data_elems;
  1067. #if FF_API_DESTRUCT_PACKET
  1068. FF_DISABLE_DEPRECATION_WARNINGS
  1069.     pkt->destruct = local_pkt.destruct;
  1070. FF_ENABLE_DEPRECATION_WARNINGS
  1071. #endif
  1072.     return ret;
  1073. }
  1074.  
  1075. static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
  1076.                                            AVFrame *frame, int interleaved)
  1077. {
  1078.     AVPacket pkt, *pktp;
  1079.  
  1080.     av_assert0(s->oformat);
  1081.     if (!s->oformat->write_uncoded_frame)
  1082.         return AVERROR(ENOSYS);
  1083.  
  1084.     if (!frame) {
  1085.         pktp = NULL;
  1086.     } else {
  1087.         pktp = &pkt;
  1088.         av_init_packet(&pkt);
  1089.         pkt.data = (void *)frame;
  1090.         pkt.size         = UNCODED_FRAME_PACKET_SIZE;
  1091.         pkt.pts          =
  1092.         pkt.dts          = frame->pts;
  1093.         pkt.duration     = av_frame_get_pkt_duration(frame);
  1094.         pkt.stream_index = stream_index;
  1095.         pkt.flags |= AV_PKT_FLAG_UNCODED_FRAME;
  1096.     }
  1097.  
  1098.     return interleaved ? av_interleaved_write_frame(s, pktp) :
  1099.                          av_write_frame(s, pktp);
  1100. }
  1101.  
  1102. int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
  1103.                            AVFrame *frame)
  1104. {
  1105.     return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
  1106. }
  1107.  
  1108. int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
  1109.                                        AVFrame *frame)
  1110. {
  1111.     return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
  1112. }
  1113.  
  1114. int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
  1115. {
  1116.     av_assert0(s->oformat);
  1117.     if (!s->oformat->write_uncoded_frame)
  1118.         return AVERROR(ENOSYS);
  1119.     return s->oformat->write_uncoded_frame(s, stream_index, NULL,
  1120.                                            AV_WRITE_UNCODED_FRAME_QUERY);
  1121. }
  1122.