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mux.c
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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 
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 
119 {
120  AVCodecParameters *par = st->codecpar;
121  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(par->format);
122 
124  return par->chroma_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) {
131  switch (par->codec_id) {
132  case AV_CODEC_ID_MJPEG:
134  }
135  }
137  switch (par->codec_id) {
139  }
140  }
141  }
142  }
143 
145 
146 }
147 
149  const char *format, const char *filename)
150 {
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) {
180  if (!s->priv_data)
181  goto nomem;
182  if (s->oformat->priv_class) {
183  *(const AVClass**)s->priv_data= s->oformat->priv_class;
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:
198  return ret;
199 }
200 
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->codecpar->codec_tag)) {
218  id = avctag->id;
219  if (id == st->codecpar->codec_id)
220  return 1;
221  }
222  if (avctag->id == st->codecpar->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 
236 {
237  int ret = 0, i;
238  AVStream *st;
239  AVDictionary *tmp = NULL;
240  AVCodecParameters *par = NULL;
241  AVOutputFormat *of = s->oformat;
242  const AVCodecDescriptor *desc;
244 
245  if (options)
246  av_dict_copy(&tmp, *options, 0);
247 
248  if ((ret = av_opt_set_dict(s, &tmp)) < 0)
249  goto fail;
250  if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
251  (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
252  goto fail;
253 
254 #if FF_API_LAVF_AVCTX
256  if (s->nb_streams && s->streams[0]->codec->flags & AV_CODEC_FLAG_BITEXACT) {
257  if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
258 #if FF_API_LAVF_BITEXACT
260  "Setting the AVFormatContext to bitexact mode, because "
261  "the AVCodecContext is in that mode. This behavior will "
262  "change in the future. To keep the current behavior, set "
263  "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
265 #else
267  "The AVFormatContext is not in set to bitexact mode, only "
268  "the AVCodecContext. If this is not intended, set "
269  "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
270 #endif
271  }
272  }
274 #endif
275 
276  // some sanity checks
277  if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
278  av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
279  ret = AVERROR(EINVAL);
280  goto fail;
281  }
282 
283  for (i = 0; i < s->nb_streams; i++) {
284  st = s->streams[i];
285  par = st->codecpar;
286 
287 #if FF_API_LAVF_CODEC_TB && FF_API_LAVF_AVCTX
289  if (!st->time_base.num && st->codec->time_base.num) {
290  av_log(s, AV_LOG_WARNING, "Using AVStream.codec.time_base as a "
291  "timebase hint to the muxer is deprecated. Set "
292  "AVStream.time_base instead.\n");
293  avpriv_set_pts_info(st, 64, st->codec->time_base.num, st->codec->time_base.den);
294  }
296 #endif
297 
298 #if FF_API_LAVF_AVCTX
301  st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) {
302  av_log(s, AV_LOG_WARNING, "Using AVStream.codec to pass codec "
303  "parameters to muxers is deprecated, use AVStream.codecpar "
304  "instead.\n");
305  ret = avcodec_parameters_from_context(st->codecpar, st->codec);
306  if (ret < 0)
307  goto fail;
308  }
310 #endif
311 
312  /* update internal context from codecpar, old bsf api needs this
313  * FIXME: remove when autobsf uses new bsf API */
315  if (ret < 0)
316  goto fail;
317 
318  if (!st->time_base.num) {
319  /* fall back on the default timebase values */
320  if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)
321  avpriv_set_pts_info(st, 64, 1, par->sample_rate);
322  else
323  avpriv_set_pts_info(st, 33, 1, 90000);
324  }
325 
326  switch (par->codec_type) {
327  case AVMEDIA_TYPE_AUDIO:
328  if (par->sample_rate <= 0) {
329  av_log(s, AV_LOG_ERROR, "sample rate not set\n");
330  ret = AVERROR(EINVAL);
331  goto fail;
332  }
333  if (!par->block_align)
334  par->block_align = par->channels *
335  av_get_bits_per_sample(par->codec_id) >> 3;
336  break;
337  case AVMEDIA_TYPE_VIDEO:
338  if ((par->width <= 0 || par->height <= 0) &&
339  !(of->flags & AVFMT_NODIMENSIONS)) {
340  av_log(s, AV_LOG_ERROR, "dimensions not set\n");
341  ret = AVERROR(EINVAL);
342  goto fail;
343  }
346  ) {
347  if (st->sample_aspect_ratio.num != 0 &&
348  st->sample_aspect_ratio.den != 0 &&
349  par->sample_aspect_ratio.num != 0 &&
350  par->sample_aspect_ratio.den != 0) {
351  av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
352  "(%d/%d) and encoder layer (%d/%d)\n",
355  par->sample_aspect_ratio.den);
356  ret = AVERROR(EINVAL);
357  goto fail;
358  }
359  }
360  break;
361  }
362 
363  desc = avcodec_descriptor_get(par->codec_id);
364  if (desc && desc->props & AV_CODEC_PROP_REORDER)
365  st->internal->reorder = 1;
366 
367  if (of->codec_tag) {
368  if ( par->codec_tag
369  && par->codec_id == AV_CODEC_ID_RAWVIDEO
370  && ( av_codec_get_tag(of->codec_tag, par->codec_id) == 0
371  || av_codec_get_tag(of->codec_tag, par->codec_id) == MKTAG('r', 'a', 'w', ' '))
372  && !validate_codec_tag(s, st)) {
373  // the current rawvideo encoding system ends up setting
374  // the wrong codec_tag for avi/mov, we override it here
375  par->codec_tag = 0;
376  }
377  if (par->codec_tag) {
378  if (!validate_codec_tag(s, st)) {
379  char tagbuf[32], tagbuf2[32];
380  av_get_codec_tag_string(tagbuf, sizeof(tagbuf), par->codec_tag);
381  av_get_codec_tag_string(tagbuf2, sizeof(tagbuf2), av_codec_get_tag(s->oformat->codec_tag, par->codec_id));
382  av_log(s, AV_LOG_ERROR,
383  "Tag %s/0x%08x incompatible with output codec id '%d' (%s)\n",
384  tagbuf, par->codec_tag, par->codec_id, tagbuf2);
385  ret = AVERROR_INVALIDDATA;
386  goto fail;
387  }
388  } else
389  par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
390  }
391 
394  }
395 
396  if (!s->priv_data && of->priv_data_size > 0) {
398  if (!s->priv_data) {
399  ret = AVERROR(ENOMEM);
400  goto fail;
401  }
402  if (of->priv_class) {
403  *(const AVClass **)s->priv_data = of->priv_class;
405  if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
406  goto fail;
407  }
408  }
409 
410  /* set muxer identification string */
411  if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
412  av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
413  } else {
414  av_dict_set(&s->metadata, "encoder", NULL, 0);
415  }
416 
417  for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
418  av_dict_set(&s->metadata, e->key, NULL, 0);
419  }
420 
421  if (options) {
422  av_dict_free(options);
423  *options = tmp;
424  }
425 
426  if (s->oformat->init && (ret = s->oformat->init(s)) < 0) {
427  if (s->oformat->deinit)
428  s->oformat->deinit(s);
429  goto fail;
430  }
431 
432  return 0;
433 
434 fail:
435  av_dict_free(&tmp);
436  return ret;
437 }
438 
440 {
441  int i;
442  AVStream *st;
443 
444  /* init PTS generation */
445  for (i = 0; i < s->nb_streams; i++) {
446  int64_t den = AV_NOPTS_VALUE;
447  st = s->streams[i];
448 
449  switch (st->codecpar->codec_type) {
450  case AVMEDIA_TYPE_AUDIO:
451  den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
452  break;
453  case AVMEDIA_TYPE_VIDEO:
454  den = (int64_t)st->time_base.num * st->time_base.den;
455  break;
456  default:
457  break;
458  }
459 
460  if (!st->priv_pts)
461  st->priv_pts = av_mallocz(sizeof(*st->priv_pts));
462  if (!st->priv_pts)
463  return AVERROR(ENOMEM);
464 
465  if (den != AV_NOPTS_VALUE) {
466  if (den <= 0)
467  return AVERROR_INVALIDDATA;
468 
469  frac_init(st->priv_pts, 0, 0, den);
470  }
471  }
472 
473  return 0;
474 }
475 
477 {
478  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
480  if (s->oformat->write_header) {
481  int ret = s->oformat->write_header(s);
482  if (ret >= 0 && s->pb && s->pb->error < 0)
483  ret = s->pb->error;
484  s->internal->write_header_ret = ret;
485  if (ret < 0)
486  return ret;
487  if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
488  avio_flush(s->pb);
489  }
490  s->internal->header_written = 1;
491  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
493  return 0;
494 }
495 
497 {
498  int ret = 0;
499 
500  if ((ret = init_muxer(s, options)) < 0)
501  return ret;
502 
503  if (!s->oformat->check_bitstream) {
504  ret = write_header_internal(s);
505  if (ret < 0)
506  goto fail;
507  }
508 
509  if ((ret = init_pts(s)) < 0)
510  goto fail;
511 
512  if (s->avoid_negative_ts < 0) {
515  s->avoid_negative_ts = 0;
516  } else
518  }
519 
520  return 0;
521 
522 fail:
523  if (s->oformat->deinit)
524  s->oformat->deinit(s);
525  return ret;
526 }
527 
528 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
529 
530 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
531  it is only being used internally to this file as a consistency check.
532  The value is chosen to be very unlikely to appear on its own and to cause
533  immediate failure if used anywhere as a real size. */
534 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
535 
536 
537 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
539 //FIXME merge with compute_pkt_fields
540 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
541 {
542  int delay = FFMAX(st->codecpar->video_delay, st->internal->avctx->max_b_frames > 0);
543  int num, den, i;
544  int frame_size;
545 
546  if (!s->internal->missing_ts_warning &&
547  !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
548  (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
550  "Timestamps are unset in a packet for stream %d. "
551  "This is deprecated and will stop working in the future. "
552  "Fix your code to set the timestamps properly\n", st->index);
553  s->internal->missing_ts_warning = 1;
554  }
555 
556  if (s->debug & FF_FDEBUG_TS)
557  av_log(s, AV_LOG_TRACE, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
558  av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
559 
560  if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
561  av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
562  pkt->duration, pkt->stream_index);
563  pkt->duration = 0;
564  }
565 
566  /* duration field */
567  if (pkt->duration == 0) {
568  ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
569  if (den && num) {
570  pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
571  }
572  }
573 
574  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
575  pkt->pts = pkt->dts;
576 
577  //XXX/FIXME this is a temporary hack until all encoders output pts
578  if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
579  static int warned;
580  if (!warned) {
581  av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
582  warned = 1;
583  }
584  pkt->dts =
585 // pkt->pts= st->cur_dts;
586  pkt->pts = st->priv_pts->val;
587  }
588 
589  //calculate dts from pts
590  if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
591  st->pts_buffer[0] = pkt->pts;
592  for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
593  st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
594  for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
595  FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
596 
597  pkt->dts = st->pts_buffer[0];
598  }
599 
600  if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
601  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
604  st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
605  av_log(s, AV_LOG_ERROR,
606  "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
607  st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
608  return AVERROR(EINVAL);
609  }
610  if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
611  av_log(s, AV_LOG_ERROR,
612  "pts (%s) < dts (%s) in stream %d\n",
613  av_ts2str(pkt->pts), av_ts2str(pkt->dts),
614  st->index);
615  return AVERROR(EINVAL);
616  }
617 
618  if (s->debug & FF_FDEBUG_TS)
619  av_log(s, AV_LOG_TRACE, "av_write_frame: pts2:%s dts2:%s\n",
620  av_ts2str(pkt->pts), av_ts2str(pkt->dts));
621 
622  st->cur_dts = pkt->dts;
623  st->priv_pts->val = pkt->dts;
624 
625  /* update pts */
626  switch (st->codecpar->codec_type) {
627  case AVMEDIA_TYPE_AUDIO:
628  frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
629  ((AVFrame *)pkt->data)->nb_samples :
630  av_get_audio_frame_duration(st->codec, pkt->size);
631 
632  /* HACK/FIXME, we skip the initial 0 size packets as they are most
633  * likely equal to the encoder delay, but it would be better if we
634  * had the real timestamps from the encoder */
635  if (frame_size >= 0 && (pkt->size || st->priv_pts->num != st->priv_pts->den >> 1 || st->priv_pts->val)) {
636  frac_add(st->priv_pts, (int64_t)st->time_base.den * frame_size);
637  }
638  break;
639  case AVMEDIA_TYPE_VIDEO:
640  frac_add(st->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
641  break;
642  }
643  return 0;
644 }
646 #endif
647 
648 /**
649  * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
650  * sidedata.
651  *
652  * FIXME: this function should NEVER get undefined pts/dts beside when the
653  * AVFMT_NOTIMESTAMPS is set.
654  * Those additional safety checks should be dropped once the correct checks
655  * are set in the callers.
656  */
658 {
659  int ret, did_split;
660 
661  if (s->output_ts_offset) {
662  AVStream *st = s->streams[pkt->stream_index];
664 
665  if (pkt->dts != AV_NOPTS_VALUE)
666  pkt->dts += offset;
667  if (pkt->pts != AV_NOPTS_VALUE)
668  pkt->pts += offset;
669  }
670 
671  if (s->avoid_negative_ts > 0) {
672  AVStream *st = s->streams[pkt->stream_index];
673  int64_t offset = st->mux_ts_offset;
674  int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
675 
676  if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
677  (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
678  s->internal->offset = -ts;
680  }
681 
682  if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
683  offset = st->mux_ts_offset =
686  st->time_base,
687  AV_ROUND_UP);
688  }
689 
690  if (pkt->dts != AV_NOPTS_VALUE)
691  pkt->dts += offset;
692  if (pkt->pts != AV_NOPTS_VALUE)
693  pkt->pts += offset;
694 
696  if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
697  av_log(s, AV_LOG_WARNING, "failed to avoid negative "
698  "pts %s in stream %d.\n"
699  "Try -avoid_negative_ts 1 as a possible workaround.\n",
700  av_ts2str(pkt->dts),
701  pkt->stream_index
702  );
703  }
704  } else {
705  av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
706  if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
708  "Packets poorly interleaved, failed to avoid negative "
709  "timestamp %s in stream %d.\n"
710  "Try -max_interleave_delta 0 as a possible workaround.\n",
711  av_ts2str(pkt->dts),
712  pkt->stream_index
713  );
714  }
715  }
716  }
717 
718  did_split = av_packet_split_side_data(pkt);
719 
720  if (!s->internal->header_written) {
722  if (ret < 0)
723  goto fail;
724  }
725 
726  if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
727  AVFrame *frame = (AVFrame *)pkt->data;
729  ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
730  av_frame_free(&frame);
731  } else {
732  ret = s->oformat->write_packet(s, pkt);
733  }
734 
735  if (s->pb && ret >= 0) {
737  avio_flush(s->pb);
738  if (s->pb->error < 0)
739  ret = s->pb->error;
740  }
741 
742 fail:
743  if (did_split)
745 
746  return ret;
747 }
748 
750 {
751  if (!pkt)
752  return 0;
753 
754  if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
755  av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
756  pkt->stream_index);
757  return AVERROR(EINVAL);
758  }
759 
761  av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
762  return AVERROR(EINVAL);
763  }
764 
765  return 0;
766 }
767 
769 {
770  int ret;
771 
772  ret = check_packet(s, pkt);
773  if (ret < 0)
774  return ret;
775 
776 #if !FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
777  /* sanitize the timestamps */
778  if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
779  AVStream *st = s->streams[pkt->stream_index];
780 
781  /* when there is no reordering (so dts is equal to pts), but
782  * only one of them is set, set the other as well */
783  if (!st->internal->reorder) {
784  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
785  pkt->pts = pkt->dts;
786  if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
787  pkt->dts = pkt->pts;
788  }
789 
790  /* check that the timestamps are set */
791  if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
792  av_log(s, AV_LOG_ERROR,
793  "Timestamps are unset in a packet for stream %d\n", st->index);
794  return AVERROR(EINVAL);
795  }
796 
797  /* check that the dts are increasing (or at least non-decreasing,
798  * if the format allows it */
799  if (st->cur_dts != AV_NOPTS_VALUE &&
800  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
801  st->cur_dts > pkt->dts)) {
802  av_log(s, AV_LOG_ERROR,
803  "Application provided invalid, non monotonically increasing "
804  "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
805  st->index, st->cur_dts, pkt->dts);
806  return AVERROR(EINVAL);
807  }
808 
809  if (pkt->pts < pkt->dts) {
810  av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
811  pkt->pts, pkt->dts, st->index);
812  return AVERROR(EINVAL);
813  }
814  }
815 #endif
816 
817  return 0;
818 }
819 
821  AVStream *st = s->streams[pkt->stream_index];
822  int i, ret;
823 
824  if (s->oformat->check_bitstream) {
825  if (!st->internal->bitstream_checked) {
826  if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
827  return ret;
828  else if (ret == 1)
829  st->internal->bitstream_checked = 1;
830  }
831  }
832 
833  for (i = 0; i < st->internal->nb_bsfcs; i++) {
834  AVBSFContext *ctx = st->internal->bsfcs[i];
835  if (i > 0) {
836  AVBSFContext* prev_ctx = st->internal->bsfcs[i - 1];
837  if (prev_ctx->par_out->extradata_size != ctx->par_in->extradata_size) {
838  if ((ret = avcodec_parameters_copy(ctx->par_in, prev_ctx->par_out)) < 0)
839  return ret;
840  }
841  }
842  // TODO: when any bitstream filter requires flushing at EOF, we'll need to
843  // flush each stream's BSF chain on write_trailer.
844  if ((ret = av_bsf_send_packet(ctx, pkt)) < 0) {
845  av_log(ctx, AV_LOG_ERROR,
846  "Failed to send packet to filter %s for stream %d",
847  ctx->filter->name, pkt->stream_index);
848  return ret;
849  }
850  // TODO: when any automatically-added bitstream filter is generating multiple
851  // output packets for a single input one, we'll need to call this in a loop
852  // and write each output packet.
853  if ((ret = av_bsf_receive_packet(ctx, pkt)) < 0) {
854  if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
855  return 0;
856  av_log(ctx, AV_LOG_ERROR,
857  "Failed to send packet to filter %s for stream %d",
858  ctx->filter->name, pkt->stream_index);
859  return ret;
860  }
861  if (i == st->internal->nb_bsfcs - 1) {
862  if (ctx->par_out->extradata_size != st->codecpar->extradata_size) {
863  if ((ret = avcodec_parameters_copy(st->codecpar, ctx->par_out)) < 0)
864  return ret;
865  }
866  }
867  }
868  return 1;
869 }
870 
872 {
873  int ret;
874 
875  ret = prepare_input_packet(s, pkt);
876  if (ret < 0)
877  return ret;
878 
879  if (!pkt) {
880  if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
881  if (!s->internal->header_written) {
883  if (ret < 0)
884  return ret;
885  }
886  ret = s->oformat->write_packet(s, NULL);
887  if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
888  avio_flush(s->pb);
889  if (ret >= 0 && s->pb && s->pb->error < 0)
890  ret = s->pb->error;
891  return ret;
892  }
893  return 1;
894  }
895 
896  ret = do_packet_auto_bsf(s, pkt);
897  if (ret <= 0)
898  return ret;
899 
900 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
901  ret = compute_muxer_pkt_fields(s, s->streams[pkt->stream_index], pkt);
902 
903  if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
904  return ret;
905 #endif
906 
907  ret = write_packet(s, pkt);
908  if (ret >= 0 && s->pb && s->pb->error < 0)
909  ret = s->pb->error;
910 
911  if (ret >= 0)
912  s->streams[pkt->stream_index]->nb_frames++;
913  return ret;
914 }
915 
916 #define CHUNK_START 0x1000
917 
919  int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
920 {
921  int ret;
922  AVPacketList **next_point, *this_pktl;
923  AVStream *st = s->streams[pkt->stream_index];
924  int chunked = s->max_chunk_size || s->max_chunk_duration;
925 
926  this_pktl = av_mallocz(sizeof(AVPacketList));
927  if (!this_pktl)
928  return AVERROR(ENOMEM);
929  if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
931  av_assert0(((AVFrame *)pkt->data)->buf);
932  this_pktl->pkt = *pkt;
933  pkt->buf = NULL;
934  pkt->side_data = NULL;
935  pkt->side_data_elems = 0;
936  } else {
937  if ((ret = av_packet_ref(&this_pktl->pkt, pkt)) < 0) {
938  av_free(this_pktl);
939  return ret;
940  }
941  }
942 
944  next_point = &(st->last_in_packet_buffer->next);
945  } else {
946  next_point = &s->internal->packet_buffer;
947  }
948 
949  if (chunked) {
951  st->interleaver_chunk_size += pkt->size;
954  || (max && st->interleaver_chunk_duration > max)) {
955  st->interleaver_chunk_size = 0;
956  this_pktl->pkt.flags |= CHUNK_START;
957  if (max && st->interleaver_chunk_duration > max) {
958  int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
959  int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
960 
961  st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
962  } else
964  }
965  }
966  if (*next_point) {
967  if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
968  goto next_non_null;
969 
970  if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
971  while ( *next_point
972  && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
973  || !compare(s, &(*next_point)->pkt, pkt)))
974  next_point = &(*next_point)->next;
975  if (*next_point)
976  goto next_non_null;
977  } else {
978  next_point = &(s->internal->packet_buffer_end->next);
979  }
980  }
981  av_assert1(!*next_point);
982 
983  s->internal->packet_buffer_end = this_pktl;
984 next_non_null:
985 
986  this_pktl->next = *next_point;
987 
989  *next_point = this_pktl;
990 
991  av_packet_unref(pkt);
992 
993  return 0;
994 }
995 
997  AVPacket *pkt)
998 {
999  AVStream *st = s->streams[pkt->stream_index];
1000  AVStream *st2 = s->streams[next->stream_index];
1001  int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
1002  st->time_base);
1004  int64_t ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO);
1005  int64_t ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO);
1006  if (ts == ts2) {
1007  ts= ( pkt ->dts* st->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)* st->time_base.den)*st2->time_base.den
1008  -( next->dts*st2->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)*st2->time_base.den)* st->time_base.den;
1009  ts2=0;
1010  }
1011  comp= (ts>ts2) - (ts<ts2);
1012  }
1013 
1014  if (comp == 0)
1015  return pkt->stream_index < next->stream_index;
1016  return comp > 0;
1017 }
1018 
1020  AVPacket *pkt, int flush)
1021 {
1022  AVPacketList *pktl;
1023  int stream_count = 0;
1024  int noninterleaved_count = 0;
1025  int i, ret;
1026 
1027  if (pkt) {
1028  if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
1029  return ret;
1030  }
1031 
1032  for (i = 0; i < s->nb_streams; i++) {
1033  if (s->streams[i]->last_in_packet_buffer) {
1034  ++stream_count;
1035  } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
1038  ++noninterleaved_count;
1039  }
1040  }
1041 
1042  if (s->internal->nb_interleaved_streams == stream_count)
1043  flush = 1;
1044 
1045  if (s->max_interleave_delta > 0 &&
1046  s->internal->packet_buffer &&
1047  !flush &&
1048  s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
1049  ) {
1050  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1051  int64_t delta_dts = INT64_MIN;
1052  int64_t top_dts = av_rescale_q(top_pkt->dts,
1053  s->streams[top_pkt->stream_index]->time_base,
1054  AV_TIME_BASE_Q);
1055 
1056  for (i = 0; i < s->nb_streams; i++) {
1057  int64_t last_dts;
1058  const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
1059 
1060  if (!last)
1061  continue;
1062 
1063  last_dts = av_rescale_q(last->pkt.dts,
1064  s->streams[i]->time_base,
1065  AV_TIME_BASE_Q);
1066  delta_dts = FFMAX(delta_dts, last_dts - top_dts);
1067  }
1068 
1069  if (delta_dts > s->max_interleave_delta) {
1070  av_log(s, AV_LOG_DEBUG,
1071  "Delay between the first packet and last packet in the "
1072  "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
1073  delta_dts, s->max_interleave_delta);
1074  flush = 1;
1075  }
1076  }
1077 
1078  if (stream_count && flush) {
1079  AVStream *st;
1080  pktl = s->internal->packet_buffer;
1081  *out = pktl->pkt;
1082  st = s->streams[out->stream_index];
1083 
1084  s->internal->packet_buffer = pktl->next;
1085  if (!s->internal->packet_buffer)
1087 
1088  if (st->last_in_packet_buffer == pktl)
1090  av_freep(&pktl);
1091 
1092  return 1;
1093  } else {
1094  av_init_packet(out);
1095  return 0;
1096  }
1097 }
1098 
1099 const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream, int64_t *ts_offset)
1100 {
1101  AVPacketList *pktl = s->internal->packet_buffer;
1102  while (pktl) {
1103  if (pktl->pkt.stream_index == stream) {
1104  AVPacket *pkt = &pktl->pkt;
1105  AVStream *st = s->streams[pkt->stream_index];
1106  *ts_offset = st->mux_ts_offset;
1107 
1108  if (s->output_ts_offset)
1109  *ts_offset += av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
1110 
1111  return pkt;
1112  }
1113  pktl = pktl->next;
1114  }
1115  return NULL;
1116 }
1117 
1118 /**
1119  * Interleave an AVPacket correctly so it can be muxed.
1120  * @param out the interleaved packet will be output here
1121  * @param in the input packet
1122  * @param flush 1 if no further packets are available as input and all
1123  * remaining packets should be output
1124  * @return 1 if a packet was output, 0 if no packet could be output,
1125  * < 0 if an error occurred
1126  */
1128 {
1129  if (s->oformat->interleave_packet) {
1130  int ret = s->oformat->interleave_packet(s, out, in, flush);
1131  if (in)
1132  av_packet_unref(in);
1133  return ret;
1134  } else
1135  return ff_interleave_packet_per_dts(s, out, in, flush);
1136 }
1137 
1139 {
1140  int ret, flush = 0;
1141 
1142  ret = prepare_input_packet(s, pkt);
1143  if (ret < 0)
1144  goto fail;
1145 
1146  if (pkt) {
1147  AVStream *st = s->streams[pkt->stream_index];
1148 
1149  ret = do_packet_auto_bsf(s, pkt);
1150  if (ret == 0)
1151  return 0;
1152  else if (ret < 0)
1153  goto fail;
1154 
1155  if (s->debug & FF_FDEBUG_TS)
1156  av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
1157  pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1158 
1159 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
1160  if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1161  goto fail;
1162 #endif
1163 
1164  if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
1165  ret = AVERROR(EINVAL);
1166  goto fail;
1167  }
1168  } else {
1169  av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1170  flush = 1;
1171  }
1172 
1173  for (;; ) {
1174  AVPacket opkt;
1175  int ret = interleave_packet(s, &opkt, pkt, flush);
1176  if (pkt) {
1177  memset(pkt, 0, sizeof(*pkt));
1178  av_init_packet(pkt);
1179  pkt = NULL;
1180  }
1181  if (ret <= 0) //FIXME cleanup needed for ret<0 ?
1182  return ret;
1183 
1184  ret = write_packet(s, &opkt);
1185  if (ret >= 0)
1186  s->streams[opkt.stream_index]->nb_frames++;
1187 
1188  av_packet_unref(&opkt);
1189 
1190  if (ret < 0)
1191  return ret;
1192  if(s->pb && s->pb->error)
1193  return s->pb->error;
1194  }
1195 fail:
1196  av_packet_unref(pkt);
1197  return ret;
1198 }
1199 
1201 {
1202  int ret, i;
1203 
1204  for (;; ) {
1205  AVPacket pkt;
1206  ret = interleave_packet(s, &pkt, NULL, 1);
1207  if (ret < 0)
1208  goto fail;
1209  if (!ret)
1210  break;
1211 
1212  ret = write_packet(s, &pkt);
1213  if (ret >= 0)
1214  s->streams[pkt.stream_index]->nb_frames++;
1215 
1216  av_packet_unref(&pkt);
1217 
1218  if (ret < 0)
1219  goto fail;
1220  if(s->pb && s->pb->error)
1221  goto fail;
1222  }
1223 
1224  if (!s->internal->header_written) {
1226  if (ret < 0)
1227  goto fail;
1228  }
1229 
1230 fail:
1231  if (s->internal->header_written && s->oformat->write_trailer) {
1232  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1234  if (ret >= 0) {
1235  ret = s->oformat->write_trailer(s);
1236  } else {
1237  s->oformat->write_trailer(s);
1238  }
1239  }
1240 
1241  if (s->oformat->deinit)
1242  s->oformat->deinit(s);
1243 
1244  if (s->pb)
1245  avio_flush(s->pb);
1246  if (ret == 0)
1247  ret = s->pb ? s->pb->error : 0;
1248  for (i = 0; i < s->nb_streams; i++) {
1249  av_freep(&s->streams[i]->priv_data);
1250  av_freep(&s->streams[i]->index_entries);
1251  }
1252  if (s->oformat->priv_class)
1253  av_opt_free(s->priv_data);
1254  av_freep(&s->priv_data);
1255  return ret;
1256 }
1257 
1258 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1259  int64_t *dts, int64_t *wall)
1260 {
1261  if (!s->oformat || !s->oformat->get_output_timestamp)
1262  return AVERROR(ENOSYS);
1263  s->oformat->get_output_timestamp(s, stream, dts, wall);
1264  return 0;
1265 }
1266 
1267 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1269 {
1270  AVPacket local_pkt;
1271  int ret;
1272 
1273  local_pkt = *pkt;
1274  local_pkt.stream_index = dst_stream;
1275  if (pkt->pts != AV_NOPTS_VALUE)
1276  local_pkt.pts = av_rescale_q(pkt->pts,
1277  src->streams[pkt->stream_index]->time_base,
1278  dst->streams[dst_stream]->time_base);
1279  if (pkt->dts != AV_NOPTS_VALUE)
1280  local_pkt.dts = av_rescale_q(pkt->dts,
1281  src->streams[pkt->stream_index]->time_base,
1282  dst->streams[dst_stream]->time_base);
1283  if (pkt->duration)
1284  local_pkt.duration = av_rescale_q(pkt->duration,
1285  src->streams[pkt->stream_index]->time_base,
1286  dst->streams[dst_stream]->time_base);
1287 
1288  if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1289  else ret = av_write_frame(dst, &local_pkt);
1290  pkt->buf = local_pkt.buf;
1291  pkt->side_data = local_pkt.side_data;
1292  pkt->side_data_elems = local_pkt.side_data_elems;
1293  return ret;
1294 }
1295 
1296 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1297  AVFrame *frame, int interleaved)
1298 {
1299  AVPacket pkt, *pktp;
1300 
1301  av_assert0(s->oformat);
1302  if (!s->oformat->write_uncoded_frame)
1303  return AVERROR(ENOSYS);
1304 
1305  if (!frame) {
1306  pktp = NULL;
1307  } else {
1308  pktp = &pkt;
1309  av_init_packet(&pkt);
1310  pkt.data = (void *)frame;
1312  pkt.pts =
1313  pkt.dts = frame->pts;
1314  pkt.duration = av_frame_get_pkt_duration(frame);
1315  pkt.stream_index = stream_index;
1317  }
1318 
1319  return interleaved ? av_interleaved_write_frame(s, pktp) :
1320  av_write_frame(s, pktp);
1321 }
1322 
1323 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1324  AVFrame *frame)
1325 {
1326  return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1327 }
1328 
1330  AVFrame *frame)
1331 {
1332  return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1333 }
1334 
1336 {
1337  av_assert0(s->oformat);
1338  if (!s->oformat->write_uncoded_frame)
1339  return AVERROR(ENOSYS);
1340  return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1342 }
#define AV_CODEC_PROP_REORDER
Codec supports frame reordering.
Definition: avcodec.h:711
static float compare(const AVFrame *haystack, const AVFrame *obj, int offx, int offy)
Definition: vf_find_rect.c:105
int64_t interleaver_chunk_size
Definition: avformat.h:1099
enum AVChromaLocation chroma_location
Definition: avcodec.h:4029
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:634
enum AVFieldOrder field_order
Video only.
Definition: avcodec.h:4020
int audio_preload
Audio preload in microseconds.
Definition: avformat.h:1647
const char * s
Definition: avisynth_c.h:631
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
AVCodecParameters * par_out
Parameters of the output stream.
Definition: avcodec.h:5725
int64_t av_frame_get_pkt_duration(const AVFrame *frame)
static int check_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mux.c:749
enum AVCodecID id
Definition: internal.h:45
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2263
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:480
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file ensuring correct interleaving.
Definition: mux.c:1138
int bitstream_checked
Whether or not check_bitstream should still be run on each packet.
Definition: internal.h:148
static void flush(AVCodecContext *avctx)
int(* init)(struct AVFormatContext *)
Initialize format.
Definition: avformat.h:630
int flush_packets
Flush the I/O context after each packet.
Definition: avformat.h:1714
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:871
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
void(* deinit)(struct AVFormatContext *)
Deinitialize format.
Definition: avformat.h:639
int reorder
Set to 1 if the codec allows reordering, so pts can be different from dts.
Definition: internal.h:135
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4493
int64_t pts_buffer[MAX_REORDER_DELAY+1]
Definition: avformat.h:1072
const char * desc
Definition: nvenc.c:89
int max_b_frames
maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 re...
Definition: avcodec.h:1943
AVRational sample_aspect_ratio
Video only.
Definition: avcodec.h:4015
struct FFFrac * priv_pts
Definition: avformat.h:1211
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1264
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3939
const struct AVBitStreamFilter * filter
The bitstream filter this context is an instance of.
Definition: avcodec.h:5703
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:943
int num
numerator
Definition: rational.h:44
The bitstream filter state.
Definition: avcodec.h:5694
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: avcodec.h:1589
int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
Interleave a packet per dts in an output media file.
Definition: mux.c:1019
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1074
int(* check_bitstream)(struct AVFormatContext *, const AVPacket *pkt)
Set up any necessary bitstream filtering and extract any extra data needed for the global header...
Definition: avformat.h:645
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1752
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:66
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:216
int av_get_output_timestamp(struct AVFormatContext *s, int stream, int64_t *dts, int64_t *wall)
Get timing information for the data currently output.
Definition: mux.c:1258
int64_t offset
Offset to remap timestamps to be non-negative.
Definition: internal.h:108
void * priv_data
Definition: avformat.h:891
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
Put a string representing the codec tag codec_tag in buf.
Definition: utils.c:3102
int avoid_negative_ts_use_pts
Definition: internal.h:121
int(* write_packet)(struct AVFormatContext *, AVPacket *pkt)
Write a packet.
Definition: avformat.h:573
static AVPacket pkt
int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
Test whether a muxer supports uncoded frame.
Definition: mux.c:1335
#define AVFMT_ALLOW_FLUSH
Format allows flushing.
Definition: avformat.h:493
static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index, AVFrame *frame, int interleaved)
Definition: mux.c:1296
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1607
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
#define AVFMT_TS_NONSTRICT
Format does not require strictly increasing timestamps, but they must still be monotonic.
Definition: avformat.h:494
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3931
int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt, AVFormatContext *src, int interleave)
Write a packet to another muxer than the one the user originally intended.
Definition: mux.c:1267
Trailer data, which doesn't contain actual content, but only for finalizing the output file...
Definition: avio.h:132
Format I/O context.
Definition: avformat.h:1325
int64_t output_ts_offset
Output timestamp offset, in microseconds.
Definition: avformat.h:1816
int64_t cur_dts
Definition: avformat.h:1048
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
internal metadata API header see avformat.h or the public API!
#define CHUNK_START
Definition: mux.c:916
Public dictionary API.
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:194
int flags
can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS, AVFMT_VARIABLE_FPS, AVFMT_NODIMENSIONS, AVFMT_NOSTREAMS, AVFMT_ALLOW_FLUSH, AVFMT_TS_NONSTRICT, AVFMT_TS_NEGATIVE
Definition: avformat.h:541
Round toward +infinity.
Definition: mathematics.h:74
Opaque data information usually continuous.
Definition: avutil.h:195
int width
Video only.
Definition: avcodec.h:4005
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:63
AVOptions.
timestamp utils, mostly useful for debugging/logging purposes
Query whether the feature is possible on this stream.
Definition: internal.h:557
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
AVPacket pkt
Definition: avformat.h:1933
int priv_data_size
size of private data so that it can be allocated in the wrapper
Definition: avformat.h:563
The exact value of the fractional number is: 'val + num / den'.
Definition: internal.h:61
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1606
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:268
void avio_write_marker(AVIOContext *s, int64_t time, enum AVIODataMarkerType type)
Mark the written bytestream as a specific type.
Definition: aviobuf.c:470
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1393
int avcodec_parameters_to_context(AVCodecContext *codec, const AVCodecParameters *par)
Fill the codec context based on the values from the supplied codec parameters.
Definition: utils.c:4133
static AVFrame * frame
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:132
const char * name
Definition: avcodec.h:5741
void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st, AVCodecParserContext *pc, AVPacket *pkt)
Return the frame duration in seconds.
Definition: utils.c:852
static double av_q2d(AVRational a)
Convert rational to double.
Definition: rational.h:80
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:39
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1436
uint8_t * data
Definition: avcodec.h:1588
int64_t max_interleave_delta
Maximum buffering duration for interleaving.
Definition: avformat.h:1601
int header_written
Whether or not a header has already been written.
Definition: internal.h:126
uint32_t tag
Definition: movenc.c:1376
#define AVERROR_EOF
End of file.
Definition: error.h:55
int write_header_ret
Definition: internal.h:127
struct AVPacketList * packet_buffer
This buffer is only needed when packets were already buffered but not decoded, for example to get the...
Definition: internal.h:78
static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
Interleave an AVPacket correctly so it can be muxed.
Definition: mux.c:1127
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1453
const OptionDef options[]
Definition: ffserver.c:3969
int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat, const char *format, const char *filename)
Allocate an AVFormatContext for an output format.
Definition: mux.c:148
#define av_log(a,...)
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1344
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
Definition: avpacket.c:572
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
#define AVFMT_FLAG_FLUSH_PACKETS
Flush the AVIOContext every packet.
Definition: avformat.h:1446
int(* write_uncoded_frame)(struct AVFormatContext *, int stream_index, AVFrame **frame, unsigned flags)
Write an uncoded AVFrame.
Definition: avformat.h:605
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:189
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:4059
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1539
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:3446
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
static int validate_codec_tag(AVFormatContext *s, AVStream *st)
Definition: mux.c:201
#define AVERROR(e)
Definition: error.h:43
#define AV_PKT_FLAG_UNCODED_FRAME
Definition: mux.c:528
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:153
int(* write_header)(struct AVFormatContext *)
Definition: avformat.h:565
int video_delay
Video only.
Definition: avcodec.h:4034
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:202
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3935
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1571
simple assert() macros that are a bit more flexible than ISO C assert().
int side_data_elems
Definition: avcodec.h:1600
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
#define FFMAX(a, b)
Definition: common.h:94
int64_t val
Definition: internal.h:62
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:82
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1594
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:2957
int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b)
Compare 2 timestamps each in its own timebases.
Definition: mathematics.c:147
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3957
int av_packet_merge_side_data(AVPacket *pkt)
Definition: avpacket.c:376
int props
Codec properties, a combination of AV_CODEC_PROP_* flags.
Definition: avcodec.h:673
static int write_packet(AVFormatContext *s, AVPacket *pkt)
Make timestamps non negative, move side data from payload to internal struct, call muxer...
Definition: mux.c:657
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1381
AVBSFContext ** bsfcs
bitstream filters to run on stream
Definition: internal.h:142
#define LIBAVFORMAT_IDENT
Definition: version.h:46
int block_align
Audio only.
Definition: avcodec.h:4056
int64_t av_rescale_q_rnd(int64_t a, AVRational bq, AVRational cq, enum AVRounding rnd)
Rescale a 64-bit integer by 2 rational numbers with specified rounding.
Definition: mathematics.c:134
This is any, unlabelled data.
Definition: avio.h:127
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:224
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:883
char filename[1024]
input or output filename
Definition: avformat.h:1401
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:246
int avformat_write_header(AVFormatContext *s, AVDictionary **options)
Allocate the stream private data and write the stream header to an output media file.
Definition: mux.c:496
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:556
ITU-R 601, SMPTE 274M 296M S314M(DV 4:1:1), mpeg2 4:2:2.
Definition: pixfmt.h:482
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:173
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
AVFormatContext * ctx
Definition: movenc.c:48
int avoid_negative_ts
Avoid negative timestamps during muxing.
Definition: avformat.h:1630
static void frac_init(FFFrac *f, int64_t val, int64_t num, int64_t den)
f = val + (num / den) + 0.5.
Definition: mux.c:64
int n
Definition: avisynth_c.h:547
AVOutputFormat * av_guess_format(const char *short_name, const char *filename, const char *mime_type)
Return the output format in the list of registered output formats which best matches the provided par...
Definition: format.c:98
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:192
static int init_muxer(AVFormatContext *s, AVDictionary **options)
Definition: mux.c:235
Opaque data information usually sparse.
Definition: avutil.h:197
int64_t num
Definition: internal.h:62
void(* get_output_timestamp)(struct AVFormatContext *s, int stream, int64_t *dts, int64_t *wall)
Definition: avformat.h:589
#define src
Definition: vp9dsp.c:530
const AVClass * priv_class
AVClass for the private context.
Definition: avformat.h:550
int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)
Set all the options from a given dictionary on an object.
Definition: opt.c:1536
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:194
int av_packet_split_side_data(AVPacket *pkt)
Definition: avpacket.c:411
Stream structure.
Definition: avformat.h:876
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:484
#define FF_FDEBUG_TS
Definition: avformat.h:1583
int frame_size
Definition: mxfenc.c:1821
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1217
int debug
Flags to enable debugging.
Definition: avformat.h:1582
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:252
int av_opt_set_dict(void *obj, AVDictionary **options)
Set all the options from a given dictionary on an object.
Definition: opt.c:1561
AVIOContext * pb
I/O context.
Definition: avformat.h:1367
const struct AVCodecTag *const * codec_tag
List of supported codec_id-codec_tag pairs, ordered by "better choice first".
Definition: avformat.h:547
int64_t den
Definition: internal.h:62
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:563
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
const AVPacket * ff_interleaved_peek(AVFormatContext *s, int stream, int64_t *ts_offset)
Find the next packet in the interleaving queue for the given stream.
Definition: mux.c:1099
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:69
#define UNCODED_FRAME_PACKET_SIZE
Definition: mux.c:534
int nb_interleaved_streams
Number of streams relevant for interleaving.
Definition: internal.h:71
static const char * format
Definition: movenc.c:47
Describe the class of an AVClass context structure.
Definition: log.h:67
#define FF_COMPLIANCE_NORMAL
Definition: avcodec.h:2877
unsigned int avpriv_toupper4(unsigned int x)
Definition: utils.c:3833
rational number numerator/denominator
Definition: rational.h:43
int avcodec_parameters_from_context(AVCodecParameters *par, const AVCodecContext *codec)
Fill the parameters struct based on the values from the supplied codec context.
Definition: utils.c:4077
int(* interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush)
Currently only used to set pixel format if not YUV420P.
Definition: avformat.h:578
enum AVChromaLocation ff_choose_chroma_location(AVFormatContext *s, AVStream *st)
Chooses a timebase for muxing the specified stream.
Definition: mux.c:118
static int do_packet_auto_bsf(AVFormatContext *s, AVPacket *pkt)
Definition: mux.c:820
AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision)
Chooses a timebase for muxing the specified stream.
Definition: mux.c:102
#define AVFMT_AVOID_NEG_TS_AUTO
Enabled when required by target format.
Definition: avformat.h:1631
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4067
int error
contains the error code or 0 if no error happened
Definition: avio.h:228
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
Return audio frame duration.
Definition: utils.c:3648
misc parsing utilities
static void interleave(short *output, short **input, int channels, int samples)
Definition: resample.c:161
This struct describes the properties of a single codec described by an AVCodecID. ...
Definition: avcodec.h:657
unsigned int tag
Definition: internal.h:46
AVRational offset_timebase
Timebase for the timestamp offset.
Definition: internal.h:113
int sample_rate
Audio only.
Definition: avcodec.h:4049
int64_t interleaver_chunk_duration
Definition: avformat.h:1100
#define AVFMT_AVOID_NEG_TS_MAKE_ZERO
Shift timestamps so that they start at 0.
Definition: avformat.h:1633
Main libavformat public API header.
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
Definition: avcodec.h:1599
int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt, int(*compare)(AVFormatContext *, AVPacket *, AVPacket *))
Add packet to AVFormatContext->packet_buffer list, determining its interleaved position using compare...
Definition: mux.c:918
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1516
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:80
int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index, AVFrame *frame)
Write an uncoded frame to an output media file.
Definition: mux.c:1329
common internal api header.
struct AVPacketList * next
Definition: avformat.h:1934
if(ret< 0)
Definition: vf_mcdeint.c:282
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:476
#define AVFMT_NOSTREAMS
Format does not require any streams.
Definition: avformat.h:489
static int write_header_internal(AVFormatContext *s)
Definition: mux.c:476
int max_chunk_size
Max chunk size in bytes Note, not all formats support this and unpredictable things may happen if it ...
Definition: avformat.h:1663
static void frac_add(FFFrac *f, int64_t incr)
Fractional addition to f: f = f + (incr / f->den).
Definition: mux.c:82
static int init_pts(AVFormatContext *s)
Definition: mux.c:439
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:932
char * key
Definition: dict.h:86
int den
denominator
Definition: rational.h:45
int av_write_uncoded_frame(AVFormatContext *s, int stream_index, AVFrame *frame)
Write an uncoded frame to an output media file.
Definition: mux.c:1323
int64_t mux_ts_offset
Timestamp offset added to timestamps before muxing NOT PART OF PUBLIC API.
Definition: avformat.h:1155
#define AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE
Shift timestamps so they are non negative.
Definition: avformat.h:1632
struct AVPacketList * packet_buffer_end
Definition: internal.h:79
#define av_free(p)
static int interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
Definition: mux.c:996
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:81
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:54
static uint8_t tmp[8]
Definition: des.c:38
int max_chunk_duration
Max chunk time in microseconds.
Definition: avformat.h:1655
void * priv_data
Format private data.
Definition: avformat.h:1353
#define AVFMT_NODIMENSIONS
Format does not need width/height.
Definition: avformat.h:488
int channels
Audio only.
Definition: avcodec.h:4045
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:153
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1587
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1200
FILE * out
Definition: movenc.c:54
#define av_freep(p)
static void comp(unsigned char *dst, int dst_stride, unsigned char *src, int src_stride, int add)
Definition: eamad.c:83
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:478
unbuffered private I/O API
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:481
AVCodecParameters * codecpar
Definition: avformat.h:1228
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3943
#define FFSWAP(type, a, b)
Definition: common.h:99
int stream_index
Definition: avcodec.h:1590
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:913
#define MKTAG(a, b, c, d)
Definition: common.h:342
unsigned int av_codec_get_tag(const struct AVCodecTag *const *tags, enum AVCodecID id)
Get the codec tag for the given codec id id.
#define AVFMT_TS_NEGATIVE
Format allows muxing negative timestamps.
Definition: avformat.h:499
This structure stores compressed data.
Definition: avcodec.h:1565
AVCodecParameters * par_in
Parameters of the input stream.
Definition: avcodec.h:5720
int(* write_trailer)(struct AVFormatContext *)
Definition: avformat.h:574
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
static int prepare_input_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mux.c:768
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1581
struct AVPacketList * last_in_packet_buffer
last packet in packet_buffer for this stream when muxing.
Definition: avformat.h:1069
Header data; this needs to be present for the stream to be decodeable.
Definition: avio.h:107
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240