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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)) {
259  "The AVFormatContext is not in set to bitexact mode, only "
260  "the AVCodecContext. If this is not intended, set "
261  "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
262  }
263  }
265 #endif
266 
267  // some sanity checks
268  if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
269  av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
270  ret = AVERROR(EINVAL);
271  goto fail;
272  }
273 
274  for (i = 0; i < s->nb_streams; i++) {
275  st = s->streams[i];
276  par = st->codecpar;
277 
278 #if FF_API_LAVF_AVCTX
281  st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) {
282  av_log(s, AV_LOG_WARNING, "Using AVStream.codec to pass codec "
283  "parameters to muxers is deprecated, use AVStream.codecpar "
284  "instead.\n");
285  ret = avcodec_parameters_from_context(st->codecpar, st->codec);
286  if (ret < 0)
287  goto fail;
288  }
290 #endif
291 
292  if (!st->time_base.num) {
293  /* fall back on the default timebase values */
294  if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)
295  avpriv_set_pts_info(st, 64, 1, par->sample_rate);
296  else
297  avpriv_set_pts_info(st, 33, 1, 90000);
298  }
299 
300  switch (par->codec_type) {
301  case AVMEDIA_TYPE_AUDIO:
302  if (par->sample_rate <= 0) {
303  av_log(s, AV_LOG_ERROR, "sample rate not set\n");
304  ret = AVERROR(EINVAL);
305  goto fail;
306  }
307  if (!par->block_align)
308  par->block_align = par->channels *
309  av_get_bits_per_sample(par->codec_id) >> 3;
310  break;
311  case AVMEDIA_TYPE_VIDEO:
312  if ((par->width <= 0 || par->height <= 0) &&
313  !(of->flags & AVFMT_NODIMENSIONS)) {
314  av_log(s, AV_LOG_ERROR, "dimensions not set\n");
315  ret = AVERROR(EINVAL);
316  goto fail;
317  }
320  ) {
321  if (st->sample_aspect_ratio.num != 0 &&
322  st->sample_aspect_ratio.den != 0 &&
323  par->sample_aspect_ratio.num != 0 &&
324  par->sample_aspect_ratio.den != 0) {
325  av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
326  "(%d/%d) and encoder layer (%d/%d)\n",
329  par->sample_aspect_ratio.den);
330  ret = AVERROR(EINVAL);
331  goto fail;
332  }
333  }
334  break;
335  }
336 
337  desc = avcodec_descriptor_get(par->codec_id);
338  if (desc && desc->props & AV_CODEC_PROP_REORDER)
339  st->internal->reorder = 1;
340 
341  if (of->codec_tag) {
342  if ( par->codec_tag
343  && par->codec_id == AV_CODEC_ID_RAWVIDEO
344  && ( av_codec_get_tag(of->codec_tag, par->codec_id) == 0
345  || av_codec_get_tag(of->codec_tag, par->codec_id) == MKTAG('r', 'a', 'w', ' '))
346  && !validate_codec_tag(s, st)) {
347  // the current rawvideo encoding system ends up setting
348  // the wrong codec_tag for avi/mov, we override it here
349  par->codec_tag = 0;
350  }
351  if (par->codec_tag) {
352  if (!validate_codec_tag(s, st)) {
353  const uint32_t otag = av_codec_get_tag(s->oformat->codec_tag, par->codec_id);
354  av_log(s, AV_LOG_ERROR,
355  "Tag %s incompatible with output codec id '%d' (%s)\n",
356  av_fourcc2str(par->codec_tag), par->codec_id, av_fourcc2str(otag));
357  ret = AVERROR_INVALIDDATA;
358  goto fail;
359  }
360  } else
361  par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
362  }
363 
366  }
367 
368  if (!s->priv_data && of->priv_data_size > 0) {
370  if (!s->priv_data) {
371  ret = AVERROR(ENOMEM);
372  goto fail;
373  }
374  if (of->priv_class) {
375  *(const AVClass **)s->priv_data = of->priv_class;
377  if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
378  goto fail;
379  }
380  }
381 
382  /* set muxer identification string */
383  if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
384  av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
385  } else {
386  av_dict_set(&s->metadata, "encoder", NULL, 0);
387  }
388 
389  for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
390  av_dict_set(&s->metadata, e->key, NULL, 0);
391  }
392 
393  if (options) {
394  av_dict_free(options);
395  *options = tmp;
396  }
397 
398  if (s->oformat->init) {
399  if ((ret = s->oformat->init(s)) < 0) {
400  if (s->oformat->deinit)
401  s->oformat->deinit(s);
402  return ret;
403  }
404  return ret == 0;
405  }
406 
407  return 0;
408 
409 fail:
410  av_dict_free(&tmp);
411  return ret;
412 }
413 
415 {
416  int i;
417  AVStream *st;
418 
419  /* init PTS generation */
420  for (i = 0; i < s->nb_streams; i++) {
421  int64_t den = AV_NOPTS_VALUE;
422  st = s->streams[i];
423 
424  switch (st->codecpar->codec_type) {
425  case AVMEDIA_TYPE_AUDIO:
426  den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
427  break;
428  case AVMEDIA_TYPE_VIDEO:
429  den = (int64_t)st->time_base.num * st->time_base.den;
430  break;
431  default:
432  break;
433  }
434 
435  if (!st->internal->priv_pts)
436  st->internal->priv_pts = av_mallocz(sizeof(*st->internal->priv_pts));
437  if (!st->internal->priv_pts)
438  return AVERROR(ENOMEM);
439 
440  if (den != AV_NOPTS_VALUE) {
441  if (den <= 0)
442  return AVERROR_INVALIDDATA;
443 
444  frac_init(st->internal->priv_pts, 0, 0, den);
445  }
446  }
447 
448  if (s->avoid_negative_ts < 0) {
451  s->avoid_negative_ts = 0;
452  } else
454  }
455 
456  return 0;
457 }
458 
460 {
461  if (s->pb && s->pb->error >= 0) {
462  if (s->flush_packets == 1 || s->flags & AVFMT_FLAG_FLUSH_PACKETS)
463  avio_flush(s->pb);
464  else if (s->flush_packets && !(s->oformat->flags & AVFMT_NOFILE))
466  }
467 }
468 
470 {
471  int ret = 0;
472 
473  if ((ret = init_muxer(s, options)) < 0)
474  return ret;
475 
476  s->internal->initialized = 1;
477  s->internal->streams_initialized = ret;
478 
479  if (s->oformat->init && ret) {
480  if ((ret = init_pts(s)) < 0)
481  return ret;
482 
484  }
485 
487 }
488 
490 {
491  int ret = 0;
492  int already_initialized = s->internal->initialized;
493  int streams_already_initialized = s->internal->streams_initialized;
494 
495  if (!already_initialized)
496  if ((ret = avformat_init_output(s, options)) < 0)
497  return ret;
498 
499  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
501  if (s->oformat->write_header) {
502  ret = s->oformat->write_header(s);
503  if (ret >= 0 && s->pb && s->pb->error < 0)
504  ret = s->pb->error;
505  if (ret < 0)
506  goto fail;
507  flush_if_needed(s);
508  }
509  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
511 
512  if (!s->internal->streams_initialized) {
513  if ((ret = init_pts(s)) < 0)
514  goto fail;
515  }
516 
517  return streams_already_initialized;
518 
519 fail:
520  if (s->oformat->deinit)
521  s->oformat->deinit(s);
522  return ret;
523 }
524 
525 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
526 
527 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
528  it is only being used internally to this file as a consistency check.
529  The value is chosen to be very unlikely to appear on its own and to cause
530  immediate failure if used anywhere as a real size. */
531 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
532 
533 
534 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
536 //FIXME merge with compute_pkt_fields
537 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
538 {
539  int delay = FFMAX(st->codecpar->video_delay, st->internal->avctx->max_b_frames > 0);
540  int num, den, i;
541  int frame_size;
542 
543  if (!s->internal->missing_ts_warning &&
544  !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
546  (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
548  "Timestamps are unset in a packet for stream %d. "
549  "This is deprecated and will stop working in the future. "
550  "Fix your code to set the timestamps properly\n", st->index);
551  s->internal->missing_ts_warning = 1;
552  }
553 
554  if (s->debug & FF_FDEBUG_TS)
555  av_log(s, AV_LOG_TRACE, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
556  av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
557 
558  if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
559  av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
560  pkt->duration, pkt->stream_index);
561  pkt->duration = 0;
562  }
563 
564  /* duration field */
565  if (pkt->duration == 0) {
566  ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
567  if (den && num) {
568  pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
569  }
570  }
571 
572  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
573  pkt->pts = pkt->dts;
574 
575  //XXX/FIXME this is a temporary hack until all encoders output pts
576  if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
577  static int warned;
578  if (!warned) {
579  av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
580  warned = 1;
581  }
582  pkt->dts =
583 // pkt->pts= st->cur_dts;
584  pkt->pts = st->internal->priv_pts->val;
585  }
586 
587  //calculate dts from pts
588  if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
589  st->pts_buffer[0] = pkt->pts;
590  for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
591  st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
592  for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
593  FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
594 
595  pkt->dts = st->pts_buffer[0];
596  }
597 
598  if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
599  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
602  st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
603  av_log(s, AV_LOG_ERROR,
604  "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
605  st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
606  return AVERROR(EINVAL);
607  }
608  if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
609  av_log(s, AV_LOG_ERROR,
610  "pts (%s) < dts (%s) in stream %d\n",
611  av_ts2str(pkt->pts), av_ts2str(pkt->dts),
612  st->index);
613  return AVERROR(EINVAL);
614  }
615 
616  if (s->debug & FF_FDEBUG_TS)
617  av_log(s, AV_LOG_TRACE, "av_write_frame: pts2:%s dts2:%s\n",
618  av_ts2str(pkt->pts), av_ts2str(pkt->dts));
619 
620  st->cur_dts = pkt->dts;
621  st->internal->priv_pts->val = pkt->dts;
622 
623  /* update pts */
624  switch (st->codecpar->codec_type) {
625  case AVMEDIA_TYPE_AUDIO:
626  frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
627  ((AVFrame *)pkt->data)->nb_samples :
628  av_get_audio_frame_duration(st->codec, pkt->size);
629 
630  /* HACK/FIXME, we skip the initial 0 size packets as they are most
631  * likely equal to the encoder delay, but it would be better if we
632  * had the real timestamps from the encoder */
633  if (frame_size >= 0 && (pkt->size || st->internal->priv_pts->num != st->internal->priv_pts->den >> 1 || st->internal->priv_pts->val)) {
634  frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * frame_size);
635  }
636  break;
637  case AVMEDIA_TYPE_VIDEO:
638  frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
639  break;
640  }
641  return 0;
642 }
644 #endif
645 
646 /**
647  * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
648  * sidedata.
649  *
650  * FIXME: this function should NEVER get undefined pts/dts beside when the
651  * AVFMT_NOTIMESTAMPS is set.
652  * Those additional safety checks should be dropped once the correct checks
653  * are set in the callers.
654  */
656 {
657  int ret;
658  int64_t pts_backup, dts_backup;
659 
660  pts_backup = pkt->pts;
661  dts_backup = pkt->dts;
662 
663  // If the timestamp offsetting below is adjusted, adjust
664  // ff_interleaved_peek similarly.
665  if (s->output_ts_offset) {
666  AVStream *st = s->streams[pkt->stream_index];
668 
669  if (pkt->dts != AV_NOPTS_VALUE)
670  pkt->dts += offset;
671  if (pkt->pts != AV_NOPTS_VALUE)
672  pkt->pts += offset;
673  }
674 
675  if (s->avoid_negative_ts > 0) {
676  AVStream *st = s->streams[pkt->stream_index];
677  int64_t offset = st->mux_ts_offset;
678  int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
679 
680  if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
681  (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
682  s->internal->offset = -ts;
684  }
685 
686  if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
687  offset = st->mux_ts_offset =
690  st->time_base,
691  AV_ROUND_UP);
692  }
693 
694  if (pkt->dts != AV_NOPTS_VALUE)
695  pkt->dts += offset;
696  if (pkt->pts != AV_NOPTS_VALUE)
697  pkt->pts += offset;
698 
700  if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
701  av_log(s, AV_LOG_WARNING, "failed to avoid negative "
702  "pts %s in stream %d.\n"
703  "Try -avoid_negative_ts 1 as a possible workaround.\n",
704  av_ts2str(pkt->pts),
705  pkt->stream_index
706  );
707  }
708  } else {
709  av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
710  if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
712  "Packets poorly interleaved, failed to avoid negative "
713  "timestamp %s in stream %d.\n"
714  "Try -max_interleave_delta 0 as a possible workaround.\n",
715  av_ts2str(pkt->dts),
716  pkt->stream_index
717  );
718  }
719  }
720  }
721 
722  if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
723  AVFrame *frame = (AVFrame *)pkt->data;
725  ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
726  av_frame_free(&frame);
727  } else {
728  ret = s->oformat->write_packet(s, pkt);
729  }
730 
731  if (s->pb && ret >= 0) {
732  flush_if_needed(s);
733  if (s->pb->error < 0)
734  ret = s->pb->error;
735  }
736 
737  if (ret < 0) {
738  pkt->pts = pts_backup;
739  pkt->dts = dts_backup;
740  }
741 
742  return ret;
743 }
744 
746 {
747  if (!pkt)
748  return 0;
749 
750  if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
751  av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
752  pkt->stream_index);
753  return AVERROR(EINVAL);
754  }
755 
757  av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
758  return AVERROR(EINVAL);
759  }
760 
761  return 0;
762 }
763 
765 {
766  int ret;
767 
768  ret = check_packet(s, pkt);
769  if (ret < 0)
770  return ret;
771 
772 #if !FF_API_COMPUTE_PKT_FIELDS2 || !FF_API_LAVF_AVCTX
773  /* sanitize the timestamps */
774  if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
775  AVStream *st = s->streams[pkt->stream_index];
776 
777  /* when there is no reordering (so dts is equal to pts), but
778  * only one of them is set, set the other as well */
779  if (!st->internal->reorder) {
780  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
781  pkt->pts = pkt->dts;
782  if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
783  pkt->dts = pkt->pts;
784  }
785 
786  /* check that the timestamps are set */
787  if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
788  av_log(s, AV_LOG_ERROR,
789  "Timestamps are unset in a packet for stream %d\n", st->index);
790  return AVERROR(EINVAL);
791  }
792 
793  /* check that the dts are increasing (or at least non-decreasing,
794  * if the format allows it */
795  if (st->cur_dts != AV_NOPTS_VALUE &&
796  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
797  st->cur_dts > pkt->dts)) {
798  av_log(s, AV_LOG_ERROR,
799  "Application provided invalid, non monotonically increasing "
800  "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
801  st->index, st->cur_dts, pkt->dts);
802  return AVERROR(EINVAL);
803  }
804 
805  if (pkt->pts < pkt->dts) {
806  av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
807  pkt->pts, pkt->dts, st->index);
808  return AVERROR(EINVAL);
809  }
810  }
811 #endif
812 
813  return 0;
814 }
815 
817  AVStream *st = s->streams[pkt->stream_index];
818  int i, ret;
819 
820  if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
821  return 1;
822 
823  if (s->oformat->check_bitstream) {
824  if (!st->internal->bitstream_checked) {
825  if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
826  return ret;
827  else if (ret == 1)
828  st->internal->bitstream_checked = 1;
829  }
830  }
831 
832  for (i = 0; i < st->internal->nb_bsfcs; i++) {
833  AVBSFContext *ctx = st->internal->bsfcs[i];
834  // TODO: when any bitstream filter requires flushing at EOF, we'll need to
835  // flush each stream's BSF chain on write_trailer.
836  if ((ret = av_bsf_send_packet(ctx, pkt)) < 0) {
837  av_log(ctx, AV_LOG_ERROR,
838  "Failed to send packet to filter %s for stream %d\n",
839  ctx->filter->name, pkt->stream_index);
840  return ret;
841  }
842  // TODO: when any automatically-added bitstream filter is generating multiple
843  // output packets for a single input one, we'll need to call this in a loop
844  // and write each output packet.
845  if ((ret = av_bsf_receive_packet(ctx, pkt)) < 0) {
846  if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
847  return 0;
848  av_log(ctx, AV_LOG_ERROR,
849  "Failed to send packet to filter %s for stream %d\n",
850  ctx->filter->name, pkt->stream_index);
852  return ret;
853  return 0;
854  }
855  }
856  return 1;
857 }
858 
860 {
861  int ret;
862 
863  ret = prepare_input_packet(s, pkt);
864  if (ret < 0)
865  return ret;
866 
867  if (!pkt) {
868  if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
869  ret = s->oformat->write_packet(s, NULL);
870  flush_if_needed(s);
871  if (ret >= 0 && s->pb && s->pb->error < 0)
872  ret = s->pb->error;
873  return ret;
874  }
875  return 1;
876  }
877 
878  ret = do_packet_auto_bsf(s, pkt);
879  if (ret <= 0)
880  return ret;
881 
882 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
883  ret = compute_muxer_pkt_fields(s, s->streams[pkt->stream_index], pkt);
884 
885  if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
886  return ret;
887 #endif
888 
889  ret = write_packet(s, pkt);
890  if (ret >= 0 && s->pb && s->pb->error < 0)
891  ret = s->pb->error;
892 
893  if (ret >= 0)
894  s->streams[pkt->stream_index]->nb_frames++;
895  return ret;
896 }
897 
898 #define CHUNK_START 0x1000
899 
901  int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
902 {
903  int ret;
904  AVPacketList **next_point, *this_pktl;
905  AVStream *st = s->streams[pkt->stream_index];
906  int chunked = s->max_chunk_size || s->max_chunk_duration;
907 
908  this_pktl = av_mallocz(sizeof(AVPacketList));
909  if (!this_pktl)
910  return AVERROR(ENOMEM);
911  if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
913  av_assert0(((AVFrame *)pkt->data)->buf);
914  this_pktl->pkt = *pkt;
915  pkt->buf = NULL;
916  pkt->side_data = NULL;
917  pkt->side_data_elems = 0;
918  } else {
919  if ((ret = av_packet_ref(&this_pktl->pkt, pkt)) < 0) {
920  av_free(this_pktl);
921  return ret;
922  }
923  }
924 
926  next_point = &(st->last_in_packet_buffer->next);
927  } else {
928  next_point = &s->internal->packet_buffer;
929  }
930 
931  if (chunked) {
933  st->interleaver_chunk_size += pkt->size;
936  || (max && st->interleaver_chunk_duration > max)) {
937  st->interleaver_chunk_size = 0;
938  this_pktl->pkt.flags |= CHUNK_START;
939  if (max && st->interleaver_chunk_duration > max) {
940  int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
941  int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
942 
943  st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
944  } else
946  }
947  }
948  if (*next_point) {
949  if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
950  goto next_non_null;
951 
952  if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
953  while ( *next_point
954  && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
955  || !compare(s, &(*next_point)->pkt, pkt)))
956  next_point = &(*next_point)->next;
957  if (*next_point)
958  goto next_non_null;
959  } else {
960  next_point = &(s->internal->packet_buffer_end->next);
961  }
962  }
963  av_assert1(!*next_point);
964 
965  s->internal->packet_buffer_end = this_pktl;
966 next_non_null:
967 
968  this_pktl->next = *next_point;
969 
971  *next_point = this_pktl;
972 
973  av_packet_unref(pkt);
974 
975  return 0;
976 }
977 
979  AVPacket *pkt)
980 {
981  AVStream *st = s->streams[pkt->stream_index];
982  AVStream *st2 = s->streams[next->stream_index];
983  int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
984  st->time_base);
986  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);
987  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);
988  if (ts == ts2) {
989  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
990  -( 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;
991  ts2=0;
992  }
993  comp= (ts>ts2) - (ts<ts2);
994  }
995 
996  if (comp == 0)
997  return pkt->stream_index < next->stream_index;
998  return comp > 0;
999 }
1000 
1002  AVPacket *pkt, int flush)
1003 {
1004  AVPacketList *pktl;
1005  int stream_count = 0;
1006  int noninterleaved_count = 0;
1007  int i, ret;
1008  int eof = flush;
1009 
1010  if (pkt) {
1011  if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
1012  return ret;
1013  }
1014 
1015  for (i = 0; i < s->nb_streams; i++) {
1016  if (s->streams[i]->last_in_packet_buffer) {
1017  ++stream_count;
1018  } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
1021  ++noninterleaved_count;
1022  }
1023  }
1024 
1025  if (s->internal->nb_interleaved_streams == stream_count)
1026  flush = 1;
1027 
1028  if (s->max_interleave_delta > 0 &&
1029  s->internal->packet_buffer &&
1030  !flush &&
1031  s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
1032  ) {
1033  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1034  int64_t delta_dts = INT64_MIN;
1035  int64_t top_dts = av_rescale_q(top_pkt->dts,
1036  s->streams[top_pkt->stream_index]->time_base,
1037  AV_TIME_BASE_Q);
1038 
1039  for (i = 0; i < s->nb_streams; i++) {
1040  int64_t last_dts;
1041  const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
1042 
1043  if (!last)
1044  continue;
1045 
1046  last_dts = av_rescale_q(last->pkt.dts,
1047  s->streams[i]->time_base,
1048  AV_TIME_BASE_Q);
1049  delta_dts = FFMAX(delta_dts, last_dts - top_dts);
1050  }
1051 
1052  if (delta_dts > s->max_interleave_delta) {
1053  av_log(s, AV_LOG_DEBUG,
1054  "Delay between the first packet and last packet in the "
1055  "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
1056  delta_dts, s->max_interleave_delta);
1057  flush = 1;
1058  }
1059  }
1060 
1061  if (s->internal->packet_buffer &&
1062  eof &&
1063  (s->flags & AVFMT_FLAG_SHORTEST) &&
1065  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1066 
1067  s->internal->shortest_end = av_rescale_q(top_pkt->dts,
1068  s->streams[top_pkt->stream_index]->time_base,
1069  AV_TIME_BASE_Q);
1070  }
1071 
1072  if (s->internal->shortest_end != AV_NOPTS_VALUE) {
1073  while (s->internal->packet_buffer) {
1074  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1075  AVStream *st;
1076  int64_t top_dts = av_rescale_q(top_pkt->dts,
1077  s->streams[top_pkt->stream_index]->time_base,
1078  AV_TIME_BASE_Q);
1079 
1080  if (s->internal->shortest_end + 1 >= top_dts)
1081  break;
1082 
1083  pktl = s->internal->packet_buffer;
1084  st = s->streams[pktl->pkt.stream_index];
1085 
1086  s->internal->packet_buffer = pktl->next;
1087  if (!s->internal->packet_buffer)
1089 
1090  if (st->last_in_packet_buffer == pktl)
1092 
1093  av_packet_unref(&pktl->pkt);
1094  av_freep(&pktl);
1095  flush = 0;
1096  }
1097  }
1098 
1099  if (stream_count && flush) {
1100  AVStream *st;
1101  pktl = s->internal->packet_buffer;
1102  *out = pktl->pkt;
1103  st = s->streams[out->stream_index];
1104 
1105  s->internal->packet_buffer = pktl->next;
1106  if (!s->internal->packet_buffer)
1108 
1109  if (st->last_in_packet_buffer == pktl)
1111  av_freep(&pktl);
1112 
1113  return 1;
1114  } else {
1115  av_init_packet(out);
1116  return 0;
1117  }
1118 }
1119 
1121  AVPacket *pkt, int add_offset)
1122 {
1123  AVPacketList *pktl = s->internal->packet_buffer;
1124  while (pktl) {
1125  if (pktl->pkt.stream_index == stream) {
1126  *pkt = pktl->pkt;
1127  if (add_offset) {
1128  AVStream *st = s->streams[pkt->stream_index];
1129  int64_t offset = st->mux_ts_offset;
1130 
1131  if (s->output_ts_offset)
1133 
1134  if (pkt->dts != AV_NOPTS_VALUE)
1135  pkt->dts += offset;
1136  if (pkt->pts != AV_NOPTS_VALUE)
1137  pkt->pts += offset;
1138  }
1139  return 0;
1140  }
1141  pktl = pktl->next;
1142  }
1143  return AVERROR(ENOENT);
1144 }
1145 
1146 /**
1147  * Interleave an AVPacket correctly so it can be muxed.
1148  * @param out the interleaved packet will be output here
1149  * @param in the input packet
1150  * @param flush 1 if no further packets are available as input and all
1151  * remaining packets should be output
1152  * @return 1 if a packet was output, 0 if no packet could be output,
1153  * < 0 if an error occurred
1154  */
1156 {
1157  if (s->oformat->interleave_packet) {
1158  int ret = s->oformat->interleave_packet(s, out, in, flush);
1159  if (in)
1160  av_packet_unref(in);
1161  return ret;
1162  } else
1163  return ff_interleave_packet_per_dts(s, out, in, flush);
1164 }
1165 
1167 {
1168  int ret, flush = 0;
1169 
1170  ret = prepare_input_packet(s, pkt);
1171  if (ret < 0)
1172  goto fail;
1173 
1174  if (pkt) {
1175  AVStream *st = s->streams[pkt->stream_index];
1176 
1177  ret = do_packet_auto_bsf(s, pkt);
1178  if (ret == 0)
1179  return 0;
1180  else if (ret < 0)
1181  goto fail;
1182 
1183  if (s->debug & FF_FDEBUG_TS)
1184  av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
1185  pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1186 
1187 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
1188  if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1189  goto fail;
1190 #endif
1191 
1192  if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
1193  ret = AVERROR(EINVAL);
1194  goto fail;
1195  }
1196  } else {
1197  av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1198  flush = 1;
1199  }
1200 
1201  for (;; ) {
1202  AVPacket opkt;
1203  int ret = interleave_packet(s, &opkt, pkt, flush);
1204  if (pkt) {
1205  memset(pkt, 0, sizeof(*pkt));
1206  av_init_packet(pkt);
1207  pkt = NULL;
1208  }
1209  if (ret <= 0) //FIXME cleanup needed for ret<0 ?
1210  return ret;
1211 
1212  ret = write_packet(s, &opkt);
1213  if (ret >= 0)
1214  s->streams[opkt.stream_index]->nb_frames++;
1215 
1216  av_packet_unref(&opkt);
1217 
1218  if (ret < 0)
1219  return ret;
1220  if(s->pb && s->pb->error)
1221  return s->pb->error;
1222  }
1223 fail:
1224  av_packet_unref(pkt);
1225  return ret;
1226 }
1227 
1229 {
1230  int ret, i;
1231 
1232  for (;; ) {
1233  AVPacket pkt;
1234  ret = interleave_packet(s, &pkt, NULL, 1);
1235  if (ret < 0)
1236  goto fail;
1237  if (!ret)
1238  break;
1239 
1240  ret = write_packet(s, &pkt);
1241  if (ret >= 0)
1242  s->streams[pkt.stream_index]->nb_frames++;
1243 
1244  av_packet_unref(&pkt);
1245 
1246  if (ret < 0)
1247  goto fail;
1248  if(s->pb && s->pb->error)
1249  goto fail;
1250  }
1251 
1252 fail:
1253  if (s->oformat->write_trailer) {
1254  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1256  if (ret >= 0) {
1257  ret = s->oformat->write_trailer(s);
1258  } else {
1259  s->oformat->write_trailer(s);
1260  }
1261  }
1262 
1263  if (s->oformat->deinit)
1264  s->oformat->deinit(s);
1265 
1266  s->internal->initialized =
1267  s->internal->streams_initialized = 0;
1268 
1269  if (s->pb)
1270  avio_flush(s->pb);
1271  if (ret == 0)
1272  ret = s->pb ? s->pb->error : 0;
1273  for (i = 0; i < s->nb_streams; i++) {
1274  av_freep(&s->streams[i]->priv_data);
1275  av_freep(&s->streams[i]->index_entries);
1276  }
1277  if (s->oformat->priv_class)
1278  av_opt_free(s->priv_data);
1279  av_freep(&s->priv_data);
1280  return ret;
1281 }
1282 
1283 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1284  int64_t *dts, int64_t *wall)
1285 {
1286  if (!s->oformat || !s->oformat->get_output_timestamp)
1287  return AVERROR(ENOSYS);
1288  s->oformat->get_output_timestamp(s, stream, dts, wall);
1289  return 0;
1290 }
1291 
1292 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1294 {
1295  AVPacket local_pkt;
1296  int ret;
1297 
1298  local_pkt = *pkt;
1299  local_pkt.stream_index = dst_stream;
1300  if (pkt->pts != AV_NOPTS_VALUE)
1301  local_pkt.pts = av_rescale_q(pkt->pts,
1302  src->streams[pkt->stream_index]->time_base,
1303  dst->streams[dst_stream]->time_base);
1304  if (pkt->dts != AV_NOPTS_VALUE)
1305  local_pkt.dts = av_rescale_q(pkt->dts,
1306  src->streams[pkt->stream_index]->time_base,
1307  dst->streams[dst_stream]->time_base);
1308  if (pkt->duration)
1309  local_pkt.duration = av_rescale_q(pkt->duration,
1310  src->streams[pkt->stream_index]->time_base,
1311  dst->streams[dst_stream]->time_base);
1312 
1313  if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1314  else ret = av_write_frame(dst, &local_pkt);
1315  pkt->buf = local_pkt.buf;
1316  pkt->side_data = local_pkt.side_data;
1317  pkt->side_data_elems = local_pkt.side_data_elems;
1318  return ret;
1319 }
1320 
1321 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1322  AVFrame *frame, int interleaved)
1323 {
1324  AVPacket pkt, *pktp;
1325 
1326  av_assert0(s->oformat);
1327  if (!s->oformat->write_uncoded_frame)
1328  return AVERROR(ENOSYS);
1329 
1330  if (!frame) {
1331  pktp = NULL;
1332  } else {
1333  pktp = &pkt;
1334  av_init_packet(&pkt);
1335  pkt.data = (void *)frame;
1337  pkt.pts =
1338  pkt.dts = frame->pts;
1339  pkt.duration = frame->pkt_duration;
1340  pkt.stream_index = stream_index;
1342  }
1343 
1344  return interleaved ? av_interleaved_write_frame(s, pktp) :
1345  av_write_frame(s, pktp);
1346 }
1347 
1348 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1349  AVFrame *frame)
1350 {
1351  return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1352 }
1353 
1355  AVFrame *frame)
1356 {
1357  return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1358 }
1359 
1361 {
1362  av_assert0(s->oformat);
1363  if (!s->oformat->write_uncoded_frame)
1364  return AVERROR(ENOSYS);
1365  return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1367 }
#define AV_CODEC_PROP_REORDER
Codec supports frame reordering.
Definition: avcodec.h:750
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:1108
enum AVChromaLocation chroma_location
Definition: avcodec.h:3928
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:771
enum AVFieldOrder field_order
Video only.
Definition: avcodec.h:3919
int audio_preload
Audio preload in microseconds.
Definition: avformat.h:1651
const char * s
Definition: avisynth_c.h:768
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static int check_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mux.c:745
enum AVCodecID id
Definition: internal.h:45
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2363
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:520
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file ensuring correct interleaving.
Definition: mux.c:1166
int bitstream_checked
Whether or not check_bitstream should still be run on each packet.
Definition: internal.h:167
FFFrac * priv_pts
Definition: internal.h:194
static void flush(AVCodecContext *avctx)
int(* init)(struct AVFormatContext *)
Initialize format.
Definition: avformat.h:617
int flush_packets
Flush the I/O context after each packet.
Definition: avformat.h:1718
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:859
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
void(* deinit)(struct AVFormatContext *)
Deinitialize format.
Definition: avformat.h:626
int reorder
Set to 1 if the codec allows reordering, so pts can be different from dts.
Definition: internal.h:154
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:4748
int64_t pts_buffer[MAX_REORDER_DELAY+1]
Definition: avformat.h:1094
const char * desc
Definition: nvenc.c:63
#define AVSTREAM_INIT_IN_INIT_OUTPUT
stream parameters initialized in avformat_init_output
Definition: avformat.h:2422
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:1761
AVRational sample_aspect_ratio
Video only.
Definition: avcodec.h:3914
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1291
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3838
const struct AVBitStreamFilter * filter
The bitstream filter this context is an instance of.
Definition: avcodec.h:5592
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:934
int num
Numerator.
Definition: rational.h:59
The bitstream filter state.
Definition: avcodec.h:5583
int index
stream index in AVFormatContext
Definition: avformat.h:873
int size
Definition: avcodec.h:1415
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:1001
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1096
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:632
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1756
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:1283
int64_t offset
Offset to remap timestamps to be non-negative.
Definition: internal.h:108
void * priv_data
Definition: avformat.h:887
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:121
int(* write_packet)(struct AVFormatContext *, AVPacket *pkt)
Write a packet.
Definition: avformat.h:558
static AVPacket pkt
int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
Test whether a muxer supports uncoded frame.
Definition: mux.c:1360
#define src
Definition: vp8dsp.c:254
#define AVFMT_ALLOW_FLUSH
Format allows flushing.
Definition: avformat.h:478
static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index, AVFrame *frame, int interleaved)
Definition: mux.c:1321
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1611
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:479
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3830
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:1292
Trailer data, which doesn't contain actual content, but only for finalizing the output file...
Definition: avio.h:140
Format I/O context.
Definition: avformat.h:1325
int64_t output_ts_offset
Output timestamp offset, in microseconds.
Definition: avformat.h:1820
int64_t cur_dts
Definition: avformat.h:1070
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:898
Public dictionary API.
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:196
static void flush_if_needed(AVFormatContext *s)
Definition: mux.c:459
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:526
Round toward +infinity.
Definition: mathematics.h:83
Opaque data information usually continuous.
Definition: avutil.h:203
int width
Video only.
Definition: avcodec.h:3904
#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:587
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
AVPacket pkt
Definition: avformat.h:1963
int priv_data_size
size of private data so that it can be allocated in the wrapper
Definition: avformat.h:548
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:1432
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:294
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:1393
static AVFrame * frame
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:144
const char * name
Definition: avcodec.h:5633
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:917
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:1436
uint8_t * data
Definition: avcodec.h:1414
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:1605
uint32_t tag
Definition: movenc.c:1448
#define AVERROR_EOF
End of file.
Definition: error.h:55
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
#define AVSTREAM_INIT_IN_WRITE_HEADER
stream parameters initialized in avformat_write_header
Definition: avformat.h:2421
static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
Interleave an AVPacket correctly so it can be muxed.
Definition: mux.c:1155
#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:3948
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:599
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:590
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:215
#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:1543
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:1638
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:525
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:163
int(* write_header)(struct AVFormatContext *)
Definition: avformat.h:550
int video_delay
Video only.
Definition: avcodec.h:3933
#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:3834
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1397
simple assert() macros that are a bit more flexible than ISO C assert().
int side_data_elems
Definition: avcodec.h:1426
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:113
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1420
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:3110
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:712
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:655
int streams_initialized
Whether or not avformat_init_output fully initialized streams.
Definition: internal.h:136
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:161
#define LIBAVFORMAT_IDENT
Definition: version.h:46
int block_align
Audio only.
Definition: avcodec.h:3955
This is any, unlabelled data.
Definition: avio.h:135
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:236
#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
int64_t shortest_end
Timestamp of the end of the shortest stream.
Definition: internal.h:126
#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:489
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:554
ITU-R 601, SMPTE 274M 296M S314M(DV 4:1:1), mpeg2 4:2:2.
Definition: pixfmt.h:522
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:175
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:1634
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:2637
int n
Definition: avisynth_c.h:684
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:200
static int init_muxer(AVFormatContext *s, AVDictionary **options)
Definition: mux.c:235
Opaque data information usually sparse.
Definition: avutil.h:205
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:574
const AVClass * priv_class
AVClass for the private context.
Definition: avformat.h:535
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:469
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:1564
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:220
static void error(const char *err)
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:842
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:872
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:469
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:1120
#define FF_FDEBUG_TS
Definition: avformat.h:1587
int frame_size
Definition: mxfenc.c:1947
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1217
int64_t pkt_duration
duration of the corresponding packet, expressed in AVStream->time_base units, 0 if unknown...
Definition: frame.h:481
int debug
Flags to enable debugging.
Definition: avformat.h:1586
#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:1589
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:532
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:590
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
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
#define UNCODED_FRAME_PACKET_SIZE
Definition: mux.c:531
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
int initialized
Whether or not avformat_init_output has already been called.
Definition: internal.h:131
#define FF_COMPLIANCE_NORMAL
Definition: avcodec.h:2563
unsigned int avpriv_toupper4(unsigned int x)
Definition: utils.c:2004
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:847
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:2249
int(* interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush)
Currently only used to set pixel format if not YUV420P.
Definition: avformat.h:563
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:816
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:1635
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4313
#define AVFMT_FLAG_AUTO_BSF
Add bitstream filters as requested by the muxer.
Definition: avformat.h:1462
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:1843
misc parsing utilities
This struct describes the properties of a single codec described by an AVCodecID. ...
Definition: avcodec.h:696
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:3948
int64_t interleaver_chunk_duration
Definition: avformat.h:1109
#define AVFMT_AVOID_NEG_TS_MAKE_ZERO
Shift timestamps so that they start at 0.
Definition: avformat.h:1637
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:1425
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:900
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1544
#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:1354
common internal api header.
struct AVPacketList * next
Definition: avformat.h:1964
if(ret< 0)
Definition: vf_mcdeint.c:279
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:465
#define AVFMT_NOSTREAMS
Format does not require any streams.
Definition: avformat.h:474
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:1667
int error_recognition
Error recognition; higher values will detect more errors but may misdetect some more or less valid pa...
Definition: avformat.h:1570
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:925
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:414
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:923
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:1348
int64_t mux_ts_offset
Timestamp offset added to timestamps before muxing NOT PART OF PUBLIC API.
Definition: avformat.h:1164
#define AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE
Shift timestamps so they are non negative.
Definition: avformat.h:1636
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:978
#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:1659
void * priv_data
Format private data.
Definition: avformat.h:1353
#define AVFMT_NODIMENSIONS
Format does not need width/height.
Definition: avformat.h:473
int channels
Audio only.
Definition: avcodec.h:3944
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:172
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1413
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1228
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:518
unbuffered private I/O API
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:521
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1014
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:3842
#define FFSWAP(type, a, b)
Definition: common.h:99
int stream_index
Definition: avcodec.h:1416
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:901
#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:484
This structure stores compressed data.
Definition: avcodec.h:1391
int(* write_trailer)(struct AVFormatContext *)
Definition: avformat.h:559
static int prepare_input_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mux.c:764
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1407
struct AVPacketList * last_in_packet_buffer
last packet in packet_buffer for this stream when muxing.
Definition: avformat.h:1091
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:1461
static uint8_t tmp[11]
Definition: aes_ctr.c:26