FFmpeg
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 #if FF_API_FORMAT_FILENAME
192  av_strlcpy(s->filename, filename, sizeof(s->filename));
194 #endif
195  if (!(s->url = av_strdup(filename)))
196  goto nomem;
197 
198  }
199  *avctx = s;
200  return 0;
201 nomem:
202  av_log(s, AV_LOG_ERROR, "Out of memory\n");
203  ret = AVERROR(ENOMEM);
204 error:
206  return ret;
207 }
208 
210 {
211  const AVCodecTag *avctag;
212  int n;
213  enum AVCodecID id = AV_CODEC_ID_NONE;
214  int64_t tag = -1;
215 
216  /**
217  * Check that tag + id is in the table
218  * If neither is in the table -> OK
219  * If tag is in the table with another id -> FAIL
220  * If id is in the table with another tag -> FAIL unless strict < normal
221  */
222  for (n = 0; s->oformat->codec_tag[n]; n++) {
223  avctag = s->oformat->codec_tag[n];
224  while (avctag->id != AV_CODEC_ID_NONE) {
225  if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codecpar->codec_tag)) {
226  id = avctag->id;
227  if (id == st->codecpar->codec_id)
228  return 1;
229  }
230  if (avctag->id == st->codecpar->codec_id)
231  tag = avctag->tag;
232  avctag++;
233  }
234  }
235  if (id != AV_CODEC_ID_NONE)
236  return 0;
237  if (tag >= 0 && (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
238  return 0;
239  return 1;
240 }
241 
242 
244 {
245  int ret = 0, i;
246  AVStream *st;
247  AVDictionary *tmp = NULL;
248  AVCodecParameters *par = NULL;
249  const AVOutputFormat *of = s->oformat;
250  const AVCodecDescriptor *desc;
252 
253  if (options)
254  av_dict_copy(&tmp, *options, 0);
255 
256  if ((ret = av_opt_set_dict(s, &tmp)) < 0)
257  goto fail;
258  if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
259  (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
260  goto fail;
261 
262 #if FF_API_FORMAT_FILENAME
264  if (!s->url && !(s->url = av_strdup(s->filename))) {
266 #else
267  if (!s->url && !(s->url = av_strdup(""))) {
268 #endif
269  ret = AVERROR(ENOMEM);
270  goto fail;
271  }
272 
273 #if FF_API_LAVF_AVCTX
275  if (s->nb_streams && s->streams[0]->codec->flags & AV_CODEC_FLAG_BITEXACT) {
276  if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
278  "The AVFormatContext is not in set to bitexact mode, only "
279  "the AVCodecContext. If this is not intended, set "
280  "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
281  }
282  }
284 #endif
285 
286  // some sanity checks
287  if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
288  av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
289  ret = AVERROR(EINVAL);
290  goto fail;
291  }
292 
293  for (i = 0; i < s->nb_streams; i++) {
294  st = s->streams[i];
295  par = st->codecpar;
296 
297 #if FF_API_LAVF_AVCTX
300  st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) {
301  av_log(s, AV_LOG_WARNING, "Using AVStream.codec to pass codec "
302  "parameters to muxers is deprecated, use AVStream.codecpar "
303  "instead.\n");
304  ret = avcodec_parameters_from_context(st->codecpar, st->codec);
305  if (ret < 0)
306  goto fail;
307  }
309 #endif
310 
311  if (!st->time_base.num) {
312  /* fall back on the default timebase values */
313  if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)
314  avpriv_set_pts_info(st, 64, 1, par->sample_rate);
315  else
316  avpriv_set_pts_info(st, 33, 1, 90000);
317  }
318 
319  switch (par->codec_type) {
320  case AVMEDIA_TYPE_AUDIO:
321  if (par->sample_rate <= 0) {
322  av_log(s, AV_LOG_ERROR, "sample rate not set\n");
323  ret = AVERROR(EINVAL);
324  goto fail;
325  }
326  if (!par->block_align)
327  par->block_align = par->channels *
328  av_get_bits_per_sample(par->codec_id) >> 3;
329  break;
330  case AVMEDIA_TYPE_VIDEO:
331  if ((par->width <= 0 || par->height <= 0) &&
332  !(of->flags & AVFMT_NODIMENSIONS)) {
333  av_log(s, AV_LOG_ERROR, "dimensions not set\n");
334  ret = AVERROR(EINVAL);
335  goto fail;
336  }
339  ) {
340  if (st->sample_aspect_ratio.num != 0 &&
341  st->sample_aspect_ratio.den != 0 &&
342  par->sample_aspect_ratio.num != 0 &&
343  par->sample_aspect_ratio.den != 0) {
344  av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
345  "(%d/%d) and encoder layer (%d/%d)\n",
348  par->sample_aspect_ratio.den);
349  ret = AVERROR(EINVAL);
350  goto fail;
351  }
352  }
353  break;
354  }
355 
356  desc = avcodec_descriptor_get(par->codec_id);
357  if (desc && desc->props & AV_CODEC_PROP_REORDER)
358  st->internal->reorder = 1;
359 
360  if (of->codec_tag) {
361  if ( par->codec_tag
362  && par->codec_id == AV_CODEC_ID_RAWVIDEO
363  && ( av_codec_get_tag(of->codec_tag, par->codec_id) == 0
364  || av_codec_get_tag(of->codec_tag, par->codec_id) == MKTAG('r', 'a', 'w', ' '))
365  && !validate_codec_tag(s, st)) {
366  // the current rawvideo encoding system ends up setting
367  // the wrong codec_tag for avi/mov, we override it here
368  par->codec_tag = 0;
369  }
370  if (par->codec_tag) {
371  if (!validate_codec_tag(s, st)) {
372  const uint32_t otag = av_codec_get_tag(s->oformat->codec_tag, par->codec_id);
373  av_log(s, AV_LOG_ERROR,
374  "Tag %s incompatible with output codec id '%d' (%s)\n",
375  av_fourcc2str(par->codec_tag), par->codec_id, av_fourcc2str(otag));
376  ret = AVERROR_INVALIDDATA;
377  goto fail;
378  }
379  } else
380  par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
381  }
382 
385  }
386 
387  if (!s->priv_data && of->priv_data_size > 0) {
389  if (!s->priv_data) {
390  ret = AVERROR(ENOMEM);
391  goto fail;
392  }
393  if (of->priv_class) {
394  *(const AVClass **)s->priv_data = of->priv_class;
396  if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
397  goto fail;
398  }
399  }
400 
401  /* set muxer identification string */
402  if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
403  av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
404  } else {
405  av_dict_set(&s->metadata, "encoder", NULL, 0);
406  }
407 
408  for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
409  av_dict_set(&s->metadata, e->key, NULL, 0);
410  }
411 
412  if (options) {
413  av_dict_free(options);
414  *options = tmp;
415  }
416 
417  if (s->oformat->init) {
418  if ((ret = s->oformat->init(s)) < 0) {
419  if (s->oformat->deinit)
420  s->oformat->deinit(s);
421  return ret;
422  }
423  return ret == 0;
424  }
425 
426  return 0;
427 
428 fail:
429  av_dict_free(&tmp);
430  return ret;
431 }
432 
433 static int init_pts(AVFormatContext *s)
434 {
435  int i;
436  AVStream *st;
437 
438  /* init PTS generation */
439  for (i = 0; i < s->nb_streams; i++) {
440  int64_t den = AV_NOPTS_VALUE;
441  st = s->streams[i];
442 
443  switch (st->codecpar->codec_type) {
444  case AVMEDIA_TYPE_AUDIO:
445  den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
446  break;
447  case AVMEDIA_TYPE_VIDEO:
448  den = (int64_t)st->time_base.num * st->time_base.den;
449  break;
450  default:
451  break;
452  }
453 
454  if (!st->internal->priv_pts)
455  st->internal->priv_pts = av_mallocz(sizeof(*st->internal->priv_pts));
456  if (!st->internal->priv_pts)
457  return AVERROR(ENOMEM);
458 
459  if (den != AV_NOPTS_VALUE) {
460  if (den <= 0)
461  return AVERROR_INVALIDDATA;
462 
463  frac_init(st->internal->priv_pts, 0, 0, den);
464  }
465  }
466 
467  if (s->avoid_negative_ts < 0) {
470  s->avoid_negative_ts = 0;
471  } else
473  }
474 
475  return 0;
476 }
477 
479 {
480  if (s->pb && s->pb->error >= 0) {
481  if (s->flush_packets == 1 || s->flags & AVFMT_FLAG_FLUSH_PACKETS)
482  avio_flush(s->pb);
483  else if (s->flush_packets && !(s->oformat->flags & AVFMT_NOFILE))
485  }
486 }
487 
489 {
490  if (s->oformat && s->oformat->deinit && s->internal->initialized)
491  s->oformat->deinit(s);
492  s->internal->initialized =
494 }
495 
497 {
498  int ret = 0;
499 
500  if ((ret = init_muxer(s, options)) < 0)
501  return ret;
502 
503  s->internal->initialized = 1;
505 
506  if (s->oformat->init && ret) {
507  if ((ret = init_pts(s)) < 0)
508  return ret;
509 
511  }
512 
514 }
515 
517 {
518  int ret = 0;
519  int already_initialized = s->internal->initialized;
520  int streams_already_initialized = s->internal->streams_initialized;
521 
522  if (!already_initialized)
523  if ((ret = avformat_init_output(s, options)) < 0)
524  return ret;
525 
526  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
528  if (s->oformat->write_header) {
529  ret = s->oformat->write_header(s);
530  if (ret >= 0 && s->pb && s->pb->error < 0)
531  ret = s->pb->error;
532  if (ret < 0)
533  goto fail;
534  flush_if_needed(s);
535  }
536  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
538 
539  if (!s->internal->streams_initialized) {
540  if ((ret = init_pts(s)) < 0)
541  goto fail;
542  }
543 
544  return streams_already_initialized;
545 
546 fail:
547  deinit_muxer(s);
548  return ret;
549 }
550 
551 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
552 
553 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
554  it is only being used internally to this file as a consistency check.
555  The value is chosen to be very unlikely to appear on its own and to cause
556  immediate failure if used anywhere as a real size. */
557 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
558 
559 
560 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
562 //FIXME merge with compute_pkt_fields
563 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
564 {
565  int delay = FFMAX(st->codecpar->video_delay, st->internal->avctx->max_b_frames > 0);
566  int num, den, i;
567  int frame_size;
568 
569  if (!s->internal->missing_ts_warning &&
570  !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
572  (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
574  "Timestamps are unset in a packet for stream %d. "
575  "This is deprecated and will stop working in the future. "
576  "Fix your code to set the timestamps properly\n", st->index);
577  s->internal->missing_ts_warning = 1;
578  }
579 
580  if (s->debug & FF_FDEBUG_TS)
581  av_log(s, AV_LOG_DEBUG, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
582  av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
583 
584  if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
585  av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
586  pkt->duration, pkt->stream_index);
587  pkt->duration = 0;
588  }
589 
590  /* duration field */
591  if (pkt->duration == 0) {
592  ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
593  if (den && num) {
594  pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
595  }
596  }
597 
598  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
599  pkt->pts = pkt->dts;
600 
601  //XXX/FIXME this is a temporary hack until all encoders output pts
602  if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
603  static int warned;
604  if (!warned) {
605  av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
606  warned = 1;
607  }
608  pkt->dts =
609 // pkt->pts= st->cur_dts;
610  pkt->pts = st->internal->priv_pts->val;
611  }
612 
613  //calculate dts from pts
614  if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
615  st->pts_buffer[0] = pkt->pts;
616  for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
617  st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
618  for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
619  FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
620 
621  pkt->dts = st->pts_buffer[0];
622  }
623 
624  if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
625  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
628  st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
629  av_log(s, AV_LOG_ERROR,
630  "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
631  st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
632  return AVERROR(EINVAL);
633  }
634  if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
635  av_log(s, AV_LOG_ERROR,
636  "pts (%s) < dts (%s) in stream %d\n",
637  av_ts2str(pkt->pts), av_ts2str(pkt->dts),
638  st->index);
639  return AVERROR(EINVAL);
640  }
641 
642  if (s->debug & FF_FDEBUG_TS)
643  av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%s dts2:%s\n",
644  av_ts2str(pkt->pts), av_ts2str(pkt->dts));
645 
646  st->cur_dts = pkt->dts;
647  st->internal->priv_pts->val = pkt->dts;
648 
649  /* update pts */
650  switch (st->codecpar->codec_type) {
651  case AVMEDIA_TYPE_AUDIO:
652  frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
653  ((AVFrame *)pkt->data)->nb_samples :
654  av_get_audio_frame_duration(st->codec, pkt->size);
655 
656  /* HACK/FIXME, we skip the initial 0 size packets as they are most
657  * likely equal to the encoder delay, but it would be better if we
658  * had the real timestamps from the encoder */
659  if (frame_size >= 0 && (pkt->size || st->internal->priv_pts->num != st->internal->priv_pts->den >> 1 || st->internal->priv_pts->val)) {
660  frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * frame_size);
661  }
662  break;
663  case AVMEDIA_TYPE_VIDEO:
664  frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
665  break;
666  }
667  return 0;
668 }
670 #endif
671 
672 /**
673  * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
674  * sidedata.
675  *
676  * FIXME: this function should NEVER get undefined pts/dts beside when the
677  * AVFMT_NOTIMESTAMPS is set.
678  * Those additional safety checks should be dropped once the correct checks
679  * are set in the callers.
680  */
682 {
683  int ret;
684  int64_t pts_backup, dts_backup;
685 
686  pts_backup = pkt->pts;
687  dts_backup = pkt->dts;
688 
689  // If the timestamp offsetting below is adjusted, adjust
690  // ff_interleaved_peek similarly.
691  if (s->output_ts_offset) {
692  AVStream *st = s->streams[pkt->stream_index];
694 
695  if (pkt->dts != AV_NOPTS_VALUE)
696  pkt->dts += offset;
697  if (pkt->pts != AV_NOPTS_VALUE)
698  pkt->pts += offset;
699  }
700 
701  if (s->avoid_negative_ts > 0) {
702  AVStream *st = s->streams[pkt->stream_index];
703  int64_t offset = st->mux_ts_offset;
704  int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
705 
706  if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
707  (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
708  s->internal->offset = -ts;
710  }
711 
712  if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
713  offset = st->mux_ts_offset =
716  st->time_base,
717  AV_ROUND_UP);
718  }
719 
720  if (pkt->dts != AV_NOPTS_VALUE)
721  pkt->dts += offset;
722  if (pkt->pts != AV_NOPTS_VALUE)
723  pkt->pts += offset;
724 
726  if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
727  av_log(s, AV_LOG_WARNING, "failed to avoid negative "
728  "pts %s in stream %d.\n"
729  "Try -avoid_negative_ts 1 as a possible workaround.\n",
730  av_ts2str(pkt->pts),
731  pkt->stream_index
732  );
733  }
734  } else {
735  av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
736  if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
738  "Packets poorly interleaved, failed to avoid negative "
739  "timestamp %s in stream %d.\n"
740  "Try -max_interleave_delta 0 as a possible workaround.\n",
741  av_ts2str(pkt->dts),
742  pkt->stream_index
743  );
744  }
745  }
746  }
747 
748  if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
749  AVFrame *frame = (AVFrame *)pkt->data;
751  ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
752  av_frame_free(&frame);
753  } else {
754  ret = s->oformat->write_packet(s, pkt);
755  }
756 
757  if (s->pb && ret >= 0) {
758  flush_if_needed(s);
759  if (s->pb->error < 0)
760  ret = s->pb->error;
761  }
762 
763  if (ret < 0) {
764  pkt->pts = pts_backup;
765  pkt->dts = dts_backup;
766  } else
767  s->streams[pkt->stream_index]->nb_frames++;
768 
769  return ret;
770 }
771 
773 {
774  if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
775  av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
776  pkt->stream_index);
777  return AVERROR(EINVAL);
778  }
779 
781  av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
782  return AVERROR(EINVAL);
783  }
784 
785  return 0;
786 }
787 
789 {
790  int ret;
791 
792  ret = check_packet(s, pkt);
793  if (ret < 0)
794  return ret;
795 
796 #if !FF_API_COMPUTE_PKT_FIELDS2 || !FF_API_LAVF_AVCTX
797  /* sanitize the timestamps */
798  if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
799  AVStream *st = s->streams[pkt->stream_index];
800 
801  /* when there is no reordering (so dts is equal to pts), but
802  * only one of them is set, set the other as well */
803  if (!st->internal->reorder) {
804  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
805  pkt->pts = pkt->dts;
806  if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
807  pkt->dts = pkt->pts;
808  }
809 
810  /* check that the timestamps are set */
811  if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
812  av_log(s, AV_LOG_ERROR,
813  "Timestamps are unset in a packet for stream %d\n", st->index);
814  return AVERROR(EINVAL);
815  }
816 
817  /* check that the dts are increasing (or at least non-decreasing,
818  * if the format allows it */
819  if (st->cur_dts != AV_NOPTS_VALUE &&
820  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
821  st->cur_dts > pkt->dts)) {
822  av_log(s, AV_LOG_ERROR,
823  "Application provided invalid, non monotonically increasing "
824  "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
825  st->index, st->cur_dts, pkt->dts);
826  return AVERROR(EINVAL);
827  }
828 
829  if (pkt->pts < pkt->dts) {
830  av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
831  pkt->pts, pkt->dts, st->index);
832  return AVERROR(EINVAL);
833  }
834  }
835 #endif
836 
837  return 0;
838 }
839 
841  AVStream *st = s->streams[pkt->stream_index];
842  int i, ret;
843 
844  if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
845  return 1;
846 
847  if (s->oformat->check_bitstream) {
848  if (!st->internal->bitstream_checked) {
849  if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
850  return ret;
851  else if (ret == 1)
852  st->internal->bitstream_checked = 1;
853  }
854  }
855 
856  for (i = 0; i < st->internal->nb_bsfcs; i++) {
857  AVBSFContext *ctx = st->internal->bsfcs[i];
858  // TODO: when any bitstream filter requires flushing at EOF, we'll need to
859  // flush each stream's BSF chain on write_trailer.
860  if ((ret = av_bsf_send_packet(ctx, pkt)) < 0) {
861  av_log(ctx, AV_LOG_ERROR,
862  "Failed to send packet to filter %s for stream %d\n",
863  ctx->filter->name, pkt->stream_index);
864  return ret;
865  }
866  // TODO: when any automatically-added bitstream filter is generating multiple
867  // output packets for a single input one, we'll need to call this in a loop
868  // and write each output packet.
869  if ((ret = av_bsf_receive_packet(ctx, pkt)) < 0) {
870  if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
871  return 0;
872  av_log(ctx, AV_LOG_ERROR,
873  "Failed to receive packet from filter %s for stream %d\n",
874  ctx->filter->name, pkt->stream_index);
876  return ret;
877  return 0;
878  }
879  }
880  return 1;
881 }
882 
884 {
885  int ret;
886 
887  if (!pkt) {
888  if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
889  ret = s->oformat->write_packet(s, NULL);
890  flush_if_needed(s);
891  if (ret >= 0 && s->pb && s->pb->error < 0)
892  ret = s->pb->error;
893  return ret;
894  }
895  return 1;
896  }
897 
898  ret = prepare_input_packet(s, pkt);
899  if (ret < 0)
900  return ret;
901 
902  ret = do_packet_auto_bsf(s, pkt);
903  if (ret <= 0)
904  return ret;
905 
906 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
907  ret = compute_muxer_pkt_fields(s, s->streams[pkt->stream_index], pkt);
908 
909  if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
910  return ret;
911 #endif
912 
913  return write_packet(s, pkt);
914 }
915 
916 #define CHUNK_START 0x1000
917 
919  int (*compare)(AVFormatContext *, const AVPacket *, const 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_malloc(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  } else {
933  if ((ret = av_packet_make_refcounted(pkt)) < 0) {
934  av_free(this_pktl);
935  return ret;
936  }
937  }
938 
939  av_packet_move_ref(&this_pktl->pkt, pkt);
940  pkt = &this_pktl->pkt;
941 
942  if (st->last_in_packet_buffer) {
943  next_point = &(st->last_in_packet_buffer->next);
944  } else {
945  next_point = &s->internal->packet_buffer;
946  }
947 
948  if (chunked) {
950  st->interleaver_chunk_size += pkt->size;
953  || (max && st->interleaver_chunk_duration > max)) {
954  st->interleaver_chunk_size = 0;
955  pkt->flags |= CHUNK_START;
956  if (max && st->interleaver_chunk_duration > max) {
957  int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
958  int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
959 
960  st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
961  } else
963  }
964  }
965  if (*next_point) {
966  if (chunked && !(pkt->flags & CHUNK_START))
967  goto next_non_null;
968 
969  if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
970  while ( *next_point
971  && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
972  || !compare(s, &(*next_point)->pkt, pkt)))
973  next_point = &(*next_point)->next;
974  if (*next_point)
975  goto next_non_null;
976  } else {
977  next_point = &(s->internal->packet_buffer_end->next);
978  }
979  }
980  av_assert1(!*next_point);
981 
982  s->internal->packet_buffer_end = this_pktl;
983 next_non_null:
984 
985  this_pktl->next = *next_point;
986 
987  st->last_in_packet_buffer = *next_point = this_pktl;
988 
989  return 0;
990 }
991 
993  const AVPacket *pkt)
994 {
995  AVStream *st = s->streams[pkt->stream_index];
996  AVStream *st2 = s->streams[next->stream_index];
997  int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
998  st->time_base);
999  if (s->audio_preload) {
1000  int preload = st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
1001  int preload2 = st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
1002  if (preload != preload2) {
1003  int64_t ts, ts2;
1004  preload *= s->audio_preload;
1005  preload2 *= s->audio_preload;
1006  ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - preload;
1007  ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - preload2;
1008  if (ts == ts2) {
1009  ts = ((uint64_t)pkt ->dts*st ->time_base.num*AV_TIME_BASE - (uint64_t)preload *st ->time_base.den)*st2->time_base.den
1010  - ((uint64_t)next->dts*st2->time_base.num*AV_TIME_BASE - (uint64_t)preload2*st2->time_base.den)*st ->time_base.den;
1011  ts2 = 0;
1012  }
1013  comp = (ts2 > ts) - (ts2 < ts);
1014  }
1015  }
1016 
1017  if (comp == 0)
1018  return pkt->stream_index < next->stream_index;
1019  return comp > 0;
1020 }
1021 
1023  AVPacket *pkt, int flush)
1024 {
1025  AVPacketList *pktl;
1026  int stream_count = 0;
1027  int noninterleaved_count = 0;
1028  int i, ret;
1029  int eof = flush;
1030 
1031  if (pkt) {
1032  if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
1033  return ret;
1034  }
1035 
1036  for (i = 0; i < s->nb_streams; i++) {
1037  if (s->streams[i]->last_in_packet_buffer) {
1038  ++stream_count;
1039  } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
1042  ++noninterleaved_count;
1043  }
1044  }
1045 
1046  if (s->internal->nb_interleaved_streams == stream_count)
1047  flush = 1;
1048 
1049  if (s->max_interleave_delta > 0 &&
1050  s->internal->packet_buffer &&
1051  !flush &&
1052  s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
1053  ) {
1054  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1055  int64_t delta_dts = INT64_MIN;
1056  int64_t top_dts = av_rescale_q(top_pkt->dts,
1057  s->streams[top_pkt->stream_index]->time_base,
1058  AV_TIME_BASE_Q);
1059 
1060  for (i = 0; i < s->nb_streams; i++) {
1061  int64_t last_dts;
1062  const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
1063 
1064  if (!last)
1065  continue;
1066 
1067  last_dts = av_rescale_q(last->pkt.dts,
1068  s->streams[i]->time_base,
1069  AV_TIME_BASE_Q);
1070  delta_dts = FFMAX(delta_dts, last_dts - top_dts);
1071  }
1072 
1073  if (delta_dts > s->max_interleave_delta) {
1074  av_log(s, AV_LOG_DEBUG,
1075  "Delay between the first packet and last packet in the "
1076  "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
1077  delta_dts, s->max_interleave_delta);
1078  flush = 1;
1079  }
1080  }
1081 
1082  if (s->internal->packet_buffer &&
1083  eof &&
1084  (s->flags & AVFMT_FLAG_SHORTEST) &&
1086  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1087 
1088  s->internal->shortest_end = av_rescale_q(top_pkt->dts,
1089  s->streams[top_pkt->stream_index]->time_base,
1090  AV_TIME_BASE_Q);
1091  }
1092 
1093  if (s->internal->shortest_end != AV_NOPTS_VALUE) {
1094  while (s->internal->packet_buffer) {
1095  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1096  AVStream *st;
1097  int64_t top_dts = av_rescale_q(top_pkt->dts,
1098  s->streams[top_pkt->stream_index]->time_base,
1099  AV_TIME_BASE_Q);
1100 
1101  if (s->internal->shortest_end + 1 >= top_dts)
1102  break;
1103 
1104  pktl = s->internal->packet_buffer;
1105  st = s->streams[pktl->pkt.stream_index];
1106 
1107  s->internal->packet_buffer = pktl->next;
1108  if (!s->internal->packet_buffer)
1110 
1111  if (st->last_in_packet_buffer == pktl)
1113 
1114  av_packet_unref(&pktl->pkt);
1115  av_freep(&pktl);
1116  flush = 0;
1117  }
1118  }
1119 
1120  if (stream_count && flush) {
1121  AVStream *st;
1122  pktl = s->internal->packet_buffer;
1123  *out = pktl->pkt;
1124  st = s->streams[out->stream_index];
1125 
1126  s->internal->packet_buffer = pktl->next;
1127  if (!s->internal->packet_buffer)
1129 
1130  if (st->last_in_packet_buffer == pktl)
1132  av_freep(&pktl);
1133 
1134  return 1;
1135  } else {
1136  av_init_packet(out);
1137  return 0;
1138  }
1139 }
1140 
1142  AVPacket *pkt, int add_offset)
1143 {
1144  AVPacketList *pktl = s->internal->packet_buffer;
1145  while (pktl) {
1146  if (pktl->pkt.stream_index == stream) {
1147  *pkt = pktl->pkt;
1148  if (add_offset) {
1149  AVStream *st = s->streams[pkt->stream_index];
1150  int64_t offset = st->mux_ts_offset;
1151 
1152  if (s->output_ts_offset)
1154 
1155  if (pkt->dts != AV_NOPTS_VALUE)
1156  pkt->dts += offset;
1157  if (pkt->pts != AV_NOPTS_VALUE)
1158  pkt->pts += offset;
1159  }
1160  return 0;
1161  }
1162  pktl = pktl->next;
1163  }
1164  return AVERROR(ENOENT);
1165 }
1166 
1167 /**
1168  * Interleave an AVPacket correctly so it can be muxed.
1169  * @param out the interleaved packet will be output here
1170  * @param in the input packet
1171  * @param flush 1 if no further packets are available as input and all
1172  * remaining packets should be output
1173  * @return 1 if a packet was output, 0 if no packet could be output,
1174  * < 0 if an error occurred
1175  */
1177 {
1178  if (s->oformat->interleave_packet) {
1179  int ret = s->oformat->interleave_packet(s, out, in, flush);
1180  if (in)
1181  av_packet_unref(in);
1182  return ret;
1183  } else
1184  return ff_interleave_packet_per_dts(s, out, in, flush);
1185 }
1186 
1188 {
1189  int ret, flush = 0;
1190 
1191  if (pkt) {
1192  AVStream *st = s->streams[pkt->stream_index];
1193 
1194  ret = prepare_input_packet(s, pkt);
1195  if (ret < 0)
1196  goto fail;
1197 
1198  ret = do_packet_auto_bsf(s, pkt);
1199  if (ret == 0)
1200  return 0;
1201  else if (ret < 0)
1202  goto fail;
1203 
1204  if (s->debug & FF_FDEBUG_TS)
1205  av_log(s, AV_LOG_DEBUG, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
1206  pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1207 
1208 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
1209  if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1210  goto fail;
1211 #endif
1212 
1213  if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
1214  ret = AVERROR(EINVAL);
1215  goto fail;
1216  }
1217  } else {
1218  av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1219  flush = 1;
1220  }
1221 
1222  for (;; ) {
1223  AVPacket opkt;
1224  int ret = interleave_packet(s, &opkt, pkt, flush);
1225  if (pkt) {
1226  memset(pkt, 0, sizeof(*pkt));
1227  av_init_packet(pkt);
1228  pkt = NULL;
1229  }
1230  if (ret <= 0) //FIXME cleanup needed for ret<0 ?
1231  return ret;
1232 
1233  ret = write_packet(s, &opkt);
1234 
1235  av_packet_unref(&opkt);
1236 
1237  if (ret < 0)
1238  return ret;
1239  }
1240 fail:
1241  av_packet_unref(pkt);
1242  return ret;
1243 }
1244 
1246 {
1247  int ret, i;
1248 
1249  for (;; ) {
1250  AVPacket pkt;
1251  ret = interleave_packet(s, &pkt, NULL, 1);
1252  if (ret < 0)
1253  goto fail;
1254  if (!ret)
1255  break;
1256 
1257  ret = write_packet(s, &pkt);
1258 
1259  av_packet_unref(&pkt);
1260 
1261  if (ret < 0)
1262  goto fail;
1263  }
1264 
1265 fail:
1266  if (s->oformat->write_trailer) {
1267  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1269  if (ret >= 0) {
1270  ret = s->oformat->write_trailer(s);
1271  } else {
1272  s->oformat->write_trailer(s);
1273  }
1274  }
1275 
1276  deinit_muxer(s);
1277 
1278  if (s->pb)
1279  avio_flush(s->pb);
1280  if (ret == 0)
1281  ret = s->pb ? s->pb->error : 0;
1282  for (i = 0; i < s->nb_streams; i++) {
1283  av_freep(&s->streams[i]->priv_data);
1284  av_freep(&s->streams[i]->index_entries);
1285  }
1286  if (s->oformat->priv_class)
1287  av_opt_free(s->priv_data);
1288  av_freep(&s->priv_data);
1289  return ret;
1290 }
1291 
1292 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1293  int64_t *dts, int64_t *wall)
1294 {
1295  if (!s->oformat || !s->oformat->get_output_timestamp)
1296  return AVERROR(ENOSYS);
1297  s->oformat->get_output_timestamp(s, stream, dts, wall);
1298  return 0;
1299 }
1300 
1301 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1303 {
1304  AVPacket local_pkt;
1305  int ret;
1306 
1307  local_pkt = *pkt;
1308  local_pkt.stream_index = dst_stream;
1309 
1310  av_packet_rescale_ts(&local_pkt,
1311  src->streams[pkt->stream_index]->time_base,
1312  dst->streams[dst_stream]->time_base);
1313 
1314  if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1315  else ret = av_write_frame(dst, &local_pkt);
1316  pkt->buf = local_pkt.buf;
1317  pkt->side_data = local_pkt.side_data;
1318  pkt->side_data_elems = local_pkt.side_data_elems;
1319  return ret;
1320 }
1321 
1322 static int write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1323  AVFrame *frame, int interleaved)
1324 {
1325  AVPacket pkt, *pktp;
1326 
1327  av_assert0(s->oformat);
1328  if (!s->oformat->write_uncoded_frame)
1329  return AVERROR(ENOSYS);
1330 
1331  if (!frame) {
1332  pktp = NULL;
1333  } else {
1334  pktp = &pkt;
1335  av_init_packet(&pkt);
1336  pkt.data = (void *)frame;
1338  pkt.pts =
1339  pkt.dts = frame->pts;
1340  pkt.duration = frame->pkt_duration;
1341  pkt.stream_index = stream_index;
1343  }
1344 
1345  return interleaved ? av_interleaved_write_frame(s, pktp) :
1346  av_write_frame(s, pktp);
1347 }
1348 
1349 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1350  AVFrame *frame)
1351 {
1352  return write_uncoded_frame_internal(s, stream_index, frame, 0);
1353 }
1354 
1356  AVFrame *frame)
1357 {
1358  return write_uncoded_frame_internal(s, stream_index, frame, 1);
1359 }
1360 
1362 {
1363  av_assert0(s->oformat);
1364  if (!s->oformat->write_uncoded_frame)
1365  return AVERROR(ENOSYS);
1366  return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1368 }
int avformat_alloc_output_context2(AVFormatContext **avctx, ff_const59 AVOutputFormat *oformat, const char *format, const char *filename)
Allocate an AVFormatContext for an output format.
Definition: mux.c:148
#define AV_CODEC_PROP_REORDER
Codec supports frame reordering.
Definition: avcodec.h:788
static float compare(const AVFrame *haystack, const AVFrame *obj, int offx, int offy)
Definition: vf_find_rect.c:104
int64_t interleaver_chunk_size
Definition: avformat.h:1124
enum AVChromaLocation chroma_location
Definition: avcodec.h:4126
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:863
enum AVFieldOrder field_order
Video only.
Definition: avcodec.h:4117
int audio_preload
Audio preload in microseconds.
Definition: avformat.h:1701
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static int check_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mux.c:772
enum AVCodecID id
Definition: internal.h:43
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2549
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:556
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file ensuring correct interleaving.
Definition: mux.c:1187
int bitstream_checked
Whether or not check_bitstream should still be run on each packet.
Definition: internal.h:165
FFFrac * priv_pts
Definition: internal.h:192
static void flush(AVCodecContext *avctx)
int flush_packets
Flush the I/O context after each packet.
Definition: avformat.h:1768
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:883
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int reorder
Set to 1 if the codec allows reordering, so pts can be different from dts.
Definition: internal.h:152
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:4943
int64_t pts_buffer[MAX_REORDER_DELAY+1]
Definition: avformat.h:1103
const char * desc
Definition: nvenc.c:68
int(* init)(struct AVFormatContext *)
Initialize format.
Definition: avformat.h:620
#define AVSTREAM_INIT_IN_INIT_OUTPUT
stream parameters initialized in avformat_init_output
Definition: avformat.h:2525
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:1881
AVRational sample_aspect_ratio
Video only.
Definition: avcodec.h:4112
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1354
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:4036
const struct AVBitStreamFilter * filter
The bitstream filter this context is an instance of.
Definition: avcodec.h:5852
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:938
int num
Numerator.
Definition: rational.h:59
The bitstream filter state.
Definition: avcodec.h:5843
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: avcodec.h:1534
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:1022
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1105
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1806
static void deinit_muxer(AVFormatContext *s)
Definition: mux.c:488
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
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:1292
static int write_uncoded_frame_internal(AVFormatContext *s, int stream_index, AVFrame *frame, int interleaved)
Definition: mux.c:1322
int64_t offset
Offset to remap timestamps to be non-negative.
Definition: internal.h:106
void * priv_data
Definition: avformat.h:891
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
int avoid_negative_ts_use_pts
Definition: internal.h:119
static AVPacket pkt
int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
Test whether a muxer supports uncoded frame.
Definition: mux.c:1361
static void error(const char *err)
#define src
Definition: vp8dsp.c:254
#define AVFMT_ALLOW_FLUSH
Format allows flushing.
Definition: avformat.h:471
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample format(the sample packing is implied by the sample format) and sample rate.The lists are not just lists
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1661
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:472
This struct describes the properties of an encoded stream.
Definition: avcodec.h:4028
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:1301
int(* interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush)
A format-specific function for interleavement.
Definition: avformat.h:566
Trailer data, which doesn&#39;t contain actual content, but only for finalizing the output file...
Definition: avio.h:140
Format I/O context.
Definition: avformat.h:1353
int64_t output_ts_offset
Output timestamp offset, in microseconds.
Definition: avformat.h:1870
int64_t cur_dts
Definition: avformat.h:1079
static void interleave(uint8_t *dst, uint8_t *src, int w, int h, int dst_linesize, int src_linesize, enum FilterMode mode, int swap)
Definition: vf_il.c:117
#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:219
static void flush_if_needed(AVFormatContext *s)
Definition: mux.c:478
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:519
Round toward +infinity.
Definition: mathematics.h:83
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:203
int width
Video only.
Definition: avcodec.h:4102
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
AVOptions.
A point in the output bytestream where the underlying AVIOContext might flush the buffer depending on...
Definition: avio.h:146
timestamp utils, mostly useful for debugging/logging purposes
Query whether the feature is possible on this stream.
Definition: internal.h:630
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
AVPacket pkt
Definition: avformat.h:2027
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
#define f(width, name)
Definition: cbs_vp9.c:255
int priv_data_size
size of private data so that it can be allocated in the wrapper
Definition: avformat.h:550
The exact value of the fractional number is: &#39;val + num / den&#39;.
Definition: internal.h:59
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1551
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:388
void avio_write_marker(AVIOContext *s, int64_t time, enum AVIODataMarkerType type)
Mark the written bytestream as a specific type.
Definition: aviobuf.c:491
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1421
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:144
const char * name
Definition: avcodec.h:5893
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:955
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:40
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1484
uint8_t * data
Definition: avcodec.h:1533
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
int64_t max_interleave_delta
Maximum buffering duration for interleaving.
Definition: avformat.h:1655
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:658
uint32_t tag
Definition: movenc.c:1534
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define max(a, b)
Definition: cuda_runtime.h:33
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:76
#define AVSTREAM_INIT_IN_WRITE_HEADER
stream parameters initialized in avformat_write_header
Definition: avformat.h:2524
static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
Interleave an AVPacket correctly so it can be muxed.
Definition: mux.c:1176
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1501
#define av_log(a,...)
static int interleave_compare_dts(AVFormatContext *s, const AVPacket *next, const AVPacket *pkt)
Definition: mux.c:992
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 ff_const59
The ff_const59 define is not part of the public API and will be removed without further warning...
Definition: avformat.h:544
#define AVFMT_FLAG_FLUSH_PACKETS
Flush the AVIOContext every packet.
Definition: avformat.h:1494
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:217
#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:1593
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:1539
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
void av_packet_rescale_ts(AVPacket *pkt, AVRational tb_src, AVRational tb_dst)
Convert valid timing fields (timestamps / durations) in a packet from one timebase to another...
Definition: avpacket.c:707
static int validate_codec_tag(AVFormatContext *s, AVStream *st)
Definition: mux.c:209
#define AV_PKT_FLAG_UNCODED_FRAME
Definition: mux.c:551
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
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:635
char * url
input or output URL.
Definition: avformat.h:1449
int video_delay
Video only.
Definition: avcodec.h:4131
#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:203
#define av_fourcc2str(fourcc)
Definition: avutil.h:348
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:4032
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1516
simple assert() macros that are a bit more flexible than ISO C assert().
int side_data_elems
Definition: avcodec.h:1545
#define FFMAX(a, b)
Definition: common.h:94
int64_t val
Definition: internal.h:60
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:122
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1539
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:3364
int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b)
Compare two timestamps each in its own time base.
Definition: mathematics.c:147
int props
Codec properties, a combination of AV_CODEC_PROP_* flags.
Definition: avcodec.h:750
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:681
int streams_initialized
Whether or not avformat_init_output fully initialized streams.
Definition: internal.h:134
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1409
AVBSFContext ** bsfcs
bitstream filters to run on stream
Definition: internal.h:159
#define LIBAVFORMAT_IDENT
Definition: version.h:46
int block_align
Audio only.
Definition: avcodec.h:4153
This is any, unlabelled data.
Definition: avio.h:135
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:926
int(* write_header)(struct AVFormatContext *)
Definition: avformat.h:552
#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
int64_t shortest_end
Timestamp of the end of the shortest stream.
Definition: internal.h:124
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
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:516
int(* write_uncoded_frame)(struct AVFormatContext *, int stream_index, AVFrame **frame, unsigned flags)
Write an uncoded AVFrame.
Definition: avformat.h:593
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:557
int av_packet_make_refcounted(AVPacket *pkt)
Ensure the data described by a given packet is reference counted.
Definition: avpacket.c:666
ITU-R 601, SMPTE 274M 296M S314M(DV 4:1:1), mpeg2 4:2:2.
Definition: pixfmt.h:558
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:192
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
AVFormatContext * ctx
Definition: movenc.c:48
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
#define s(width, name)
Definition: cbs_vp9.c:257
int avoid_negative_ts
Avoid negative timestamps during muxing.
Definition: avformat.h:1684
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
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2761
int n
Definition: avisynth_c.h:760
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
static int init_muxer(AVFormatContext *s, AVDictionary **options)
Definition: mux.c:243
Opaque data information usually sparse.
Definition: avutil.h:205
int64_t num
Definition: internal.h:60
const AVClass * priv_class
AVClass for the private context.
Definition: avformat.h:528
int avformat_init_output(AVFormatContext *s, AVDictionary **options)
Allocate the stream private data and initialize the codec, but do not write the header.
Definition: mux.c:496
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:1627
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:222
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:844
ff_const59 struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1372
if(ret)
static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
Definition: eamad.c:83
Stream structure.
Definition: avformat.h:876
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:462
int ff_interleaved_peek(AVFormatContext *s, int stream, AVPacket *pkt, int add_offset)
Find the next packet in the interleaving queue for the given stream.
Definition: mux.c:1141
#define FF_FDEBUG_TS
Definition: avformat.h:1637
int frame_size
Definition: mxfenc.c:2140
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1233
int64_t pkt_duration
duration of the corresponding packet, expressed in AVStream->time_base units, 0 if unknown...
Definition: frame.h:574
int debug
Flags to enable debugging.
Definition: avformat.h:1636
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
int av_opt_set_dict(void *obj, AVDictionary **options)
Set all the options from a given dictionary on an object.
Definition: opt.c:1652
AVIOContext * pb
I/O context.
Definition: avformat.h:1395
const struct AVCodecTag *const * codec_tag
List of supported codec_id-codec_tag pairs, ordered by "better choice first".
Definition: avformat.h:525
int64_t den
Definition: internal.h:60
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:600
int(* write_trailer)(struct AVFormatContext *)
Definition: avformat.h:561
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:70
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31))))#define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac){}void ff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map){AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;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);return NULL;}return ac;}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;}else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->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);return ac;}int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){int use_generic=1;int len=in->nb_samples;int p;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
#define UNCODED_FRAME_PACKET_SIZE
Definition: mux.c:557
int nb_interleaved_streams
Number of streams relevant for interleaving.
Definition: internal.h:69
Describe the class of an AVClass context structure.
Definition: log.h:67
int initialized
Whether or not avformat_init_output has already been called.
Definition: internal.h:129
#define FF_COMPLIANCE_NORMAL
Definition: avcodec.h:2687
unsigned int avpriv_toupper4(unsigned int x)
Definition: utils.c:1819
ff_const59 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:51
int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt, int(*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))
Add packet to AVFormatContext->packet_buffer list, determining its interleaved position using compare...
Definition: mux.c:918
Rational number (pair of numerator and denominator).
Definition: rational.h:58
#define AV_DISPOSITION_TIMED_THUMBNAILS
The stream is sparse, and contains thumbnail images, often corresponding to chapter markers...
Definition: avformat.h:849
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:2069
void(* get_output_timestamp)(struct AVFormatContext *s, int stream, int64_t *dts, int64_t *wall)
Definition: avformat.h:577
void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:233
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:840
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:1685
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4453
#define AVFMT_FLAG_AUTO_BSF
Add bitstream filters as requested by the muxer.
Definition: avformat.h:1512
int error
contains the error code or 0 if no error happened
Definition: avio.h:245
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
Return audio frame duration.
Definition: utils.c:1743
misc parsing utilities
This struct describes the properties of a single codec described by an AVCodecID. ...
Definition: avcodec.h:734
unsigned int tag
Definition: internal.h:44
AVRational offset_timebase
Timebase for the timestamp offset.
Definition: internal.h:111
int sample_rate
Audio only.
Definition: avcodec.h:4146
int64_t interleaver_chunk_duration
Definition: avformat.h:1125
#define AVFMT_AVOID_NEG_TS_MAKE_ZERO
Shift timestamps so that they start at 0.
Definition: avformat.h:1687
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
Main libavformat public API header.
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
Definition: avcodec.h:1544
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1607
const OptionDef options[]
Definition: ffmpeg_opt.c:3439
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
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:1355
common internal api header.
struct AVPacketList * next
Definition: avformat.h:2028
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:458
#define AVFMT_NOSTREAMS
Format does not require any streams.
Definition: avformat.h:467
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:1717
int error_recognition
Error recognition; higher values will detect more errors but may misdetect some more or less valid pa...
Definition: avformat.h:1620
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:929
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:433
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:927
char * key
Definition: dict.h:86
int den
Denominator.
Definition: rational.h:60
int av_write_uncoded_frame(AVFormatContext *s, int stream_index, AVFrame *frame)
Write an uncoded frame to an output media file.
Definition: mux.c:1349
int64_t mux_ts_offset
Timestamp offset added to timestamps before muxing NOT PART OF PUBLIC API.
Definition: avformat.h:1180
#define AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE
Shift timestamps so they are non negative.
Definition: avformat.h:1686
struct AVPacketList * packet_buffer_end
Definition: internal.h:77
#define av_free(p)
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:54
int max_chunk_duration
Max chunk time in microseconds.
Definition: avformat.h:1709
void * priv_data
Format private data.
Definition: avformat.h:1381
void(* deinit)(struct AVFormatContext *)
Deinitialize format.
Definition: avformat.h:629
#define AVFMT_NODIMENSIONS
Format does not need width/height.
Definition: avformat.h:466
int(* write_packet)(struct AVFormatContext *, AVPacket *pkt)
Write a packet.
Definition: avformat.h:560
int channels
Audio only.
Definition: avcodec.h:4142
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:170
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1532
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1245
FILE * out
Definition: movenc.c:54
#define av_freep(p)
#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:554
unbuffered private I/O API
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:557
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
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
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:4040
#define FFSWAP(type, a, b)
Definition: common.h:99
int stream_index
Definition: avcodec.h:1535
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:905
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
#define MKTAG(a, b, c, d)
Definition: common.h:366
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:477
This structure stores compressed data.
Definition: avcodec.h:1510
static int prepare_input_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mux.c:788
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1526
struct AVPacketList * last_in_packet_buffer
last packet in packet_buffer for this stream when muxing.
Definition: avformat.h:1100
Header data; this needs to be present for the stream to be decodeable.
Definition: avio.h:115
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define AVFMT_FLAG_SHORTEST
Stop muxing when the shortest stream stops.
Definition: avformat.h:1511
static uint8_t tmp[11]
Definition: aes_ctr.c:26