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mux.c
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1 /*
2  * muxing functions for use within FFmpeg
3  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "avformat.h"
23 #include "avio_internal.h"
24 #include "internal.h"
25 #include "libavcodec/internal.h"
26 #include "libavcodec/bytestream.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/timestamp.h"
31 #include "metadata.h"
32 #include "id3v2.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/avstring.h"
35 #include "libavutil/internal.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/parseutils.h"
38 #include "libavutil/time.h"
39 #include "riff.h"
40 #include "audiointerleave.h"
41 #include "url.h"
42 #include <stdarg.h>
43 #if CONFIG_NETWORK
44 #include "network.h"
45 #endif
46 
47 /**
48  * @file
49  * muxing functions for use within libavformat
50  */
51 
52 /* fraction handling */
53 
54 /**
55  * f = val + (num / den) + 0.5.
56  *
57  * 'num' is normalized so that it is such as 0 <= num < den.
58  *
59  * @param f fractional number
60  * @param val integer value
61  * @param num must be >= 0
62  * @param den must be >= 1
63  */
64 static void frac_init(FFFrac *f, int64_t val, int64_t num, int64_t den)
65 {
66  num += (den >> 1);
67  if (num >= den) {
68  val += num / den;
69  num = num % den;
70  }
71  f->val = val;
72  f->num = num;
73  f->den = den;
74 }
75 
76 /**
77  * Fractional addition to f: f = f + (incr / f->den).
78  *
79  * @param f fractional number
80  * @param incr increment, can be positive or negative
81  */
82 static void frac_add(FFFrac *f, int64_t incr)
83 {
84  int64_t num, den;
85 
86  num = f->num + incr;
87  den = f->den;
88  if (num < 0) {
89  f->val += num / den;
90  num = num % den;
91  if (num < 0) {
92  num += den;
93  f->val--;
94  }
95  } else if (num >= den) {
96  f->val += num / den;
97  num = num % den;
98  }
99  f->num = num;
100 }
101 
103 {
104  AVRational q;
105  int j;
106 
107  q = st->time_base;
108 
109  for (j=2; j<14; j+= 1+(j>2))
110  while (q.den / q.num < min_precision && q.num % j == 0)
111  q.num /= j;
112  while (q.den / q.num < min_precision && q.den < (1<<24))
113  q.den <<= 1;
114 
115  return q;
116 }
117 
119 {
120  AVCodecParameters *par = st->codecpar;
121  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(par->format);
122 
124  return par->chroma_location;
125 
126  if (pix_desc) {
127  if (pix_desc->log2_chroma_h == 0) {
128  return AVCHROMA_LOC_TOPLEFT;
129  } else if (pix_desc->log2_chroma_w == 1 && pix_desc->log2_chroma_h == 1) {
131  switch (par->codec_id) {
132  case AV_CODEC_ID_MJPEG:
134  }
135  }
137  switch (par->codec_id) {
139  }
140  }
141  }
142  }
143 
145 
146 }
147 
149  const char *format, const char *filename)
150 {
152  int ret = 0;
153 
154  *avctx = NULL;
155  if (!s)
156  goto nomem;
157 
158  if (!oformat) {
159  if (format) {
160  oformat = av_guess_format(format, NULL, NULL);
161  if (!oformat) {
162  av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
163  ret = AVERROR(EINVAL);
164  goto error;
165  }
166  } else {
167  oformat = av_guess_format(NULL, filename, NULL);
168  if (!oformat) {
169  ret = AVERROR(EINVAL);
170  av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
171  filename);
172  goto error;
173  }
174  }
175  }
176 
177  s->oformat = oformat;
178  if (s->oformat->priv_data_size > 0) {
180  if (!s->priv_data)
181  goto nomem;
182  if (s->oformat->priv_class) {
183  *(const AVClass**)s->priv_data= s->oformat->priv_class;
185  }
186  } else
187  s->priv_data = NULL;
188 
189  if (filename)
190  av_strlcpy(s->filename, filename, sizeof(s->filename));
191  *avctx = s;
192  return 0;
193 nomem:
194  av_log(s, AV_LOG_ERROR, "Out of memory\n");
195  ret = AVERROR(ENOMEM);
196 error:
198  return ret;
199 }
200 
202 {
203  const AVCodecTag *avctag;
204  int n;
205  enum AVCodecID id = AV_CODEC_ID_NONE;
206  int64_t tag = -1;
207 
208  /**
209  * Check that tag + id is in the table
210  * If neither is in the table -> OK
211  * If tag is in the table with another id -> FAIL
212  * If id is in the table with another tag -> FAIL unless strict < normal
213  */
214  for (n = 0; s->oformat->codec_tag[n]; n++) {
215  avctag = s->oformat->codec_tag[n];
216  while (avctag->id != AV_CODEC_ID_NONE) {
217  if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codecpar->codec_tag)) {
218  id = avctag->id;
219  if (id == st->codecpar->codec_id)
220  return 1;
221  }
222  if (avctag->id == st->codecpar->codec_id)
223  tag = avctag->tag;
224  avctag++;
225  }
226  }
227  if (id != AV_CODEC_ID_NONE)
228  return 0;
229  if (tag >= 0 && (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
230  return 0;
231  return 1;
232 }
233 
234 
236 {
237  int ret = 0, i;
238  AVStream *st;
239  AVDictionary *tmp = NULL;
240  AVCodecParameters *par = NULL;
241  AVOutputFormat *of = s->oformat;
242  const AVCodecDescriptor *desc;
244 
245  if (options)
246  av_dict_copy(&tmp, *options, 0);
247 
248  if ((ret = av_opt_set_dict(s, &tmp)) < 0)
249  goto fail;
250  if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
251  (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
252  goto fail;
253 
254 #if FF_API_LAVF_AVCTX
256  if (s->nb_streams && s->streams[0]->codec->flags & AV_CODEC_FLAG_BITEXACT) {
257  if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
258 #if FF_API_LAVF_BITEXACT
260  "Setting the AVFormatContext to bitexact mode, because "
261  "the AVCodecContext is in that mode. This behavior will "
262  "change in the future. To keep the current behavior, set "
263  "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
265 #else
267  "The AVFormatContext is not in set to bitexact mode, only "
268  "the AVCodecContext. If this is not intended, set "
269  "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
270 #endif
271  }
272  }
274 #endif
275 
276  // some sanity checks
277  if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
278  av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
279  ret = AVERROR(EINVAL);
280  goto fail;
281  }
282 
283  for (i = 0; i < s->nb_streams; i++) {
284  st = s->streams[i];
285  par = st->codecpar;
286 
287 #if FF_API_LAVF_CODEC_TB && FF_API_LAVF_AVCTX
289  if (!st->time_base.num && st->codec->time_base.num) {
290  av_log(s, AV_LOG_WARNING, "Using AVStream.codec.time_base as a "
291  "timebase hint to the muxer is deprecated. Set "
292  "AVStream.time_base instead.\n");
293  avpriv_set_pts_info(st, 64, st->codec->time_base.num, st->codec->time_base.den);
294  }
296 #endif
297 
298 #if FF_API_LAVF_AVCTX
301  st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) {
302  av_log(s, AV_LOG_WARNING, "Using AVStream.codec to pass codec "
303  "parameters to muxers is deprecated, use AVStream.codecpar "
304  "instead.\n");
305  ret = avcodec_parameters_from_context(st->codecpar, st->codec);
306  if (ret < 0)
307  goto fail;
308  }
310 #endif
311 
312  /* update internal context from codecpar, old bsf api needs this
313  * FIXME: remove when autobsf uses new bsf API */
315  if (ret < 0)
316  goto fail;
317 
318  if (!st->time_base.num) {
319  /* fall back on the default timebase values */
320  if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)
321  avpriv_set_pts_info(st, 64, 1, par->sample_rate);
322  else
323  avpriv_set_pts_info(st, 33, 1, 90000);
324  }
325 
326  switch (par->codec_type) {
327  case AVMEDIA_TYPE_AUDIO:
328  if (par->sample_rate <= 0) {
329  av_log(s, AV_LOG_ERROR, "sample rate not set\n");
330  ret = AVERROR(EINVAL);
331  goto fail;
332  }
333  if (!par->block_align)
334  par->block_align = par->channels *
335  av_get_bits_per_sample(par->codec_id) >> 3;
336  break;
337  case AVMEDIA_TYPE_VIDEO:
338  if ((par->width <= 0 || par->height <= 0) &&
339  !(of->flags & AVFMT_NODIMENSIONS)) {
340  av_log(s, AV_LOG_ERROR, "dimensions not set\n");
341  ret = AVERROR(EINVAL);
342  goto fail;
343  }
346  ) {
347  if (st->sample_aspect_ratio.num != 0 &&
348  st->sample_aspect_ratio.den != 0 &&
349  par->sample_aspect_ratio.num != 0 &&
350  par->sample_aspect_ratio.den != 0) {
351  av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
352  "(%d/%d) and encoder layer (%d/%d)\n",
355  par->sample_aspect_ratio.den);
356  ret = AVERROR(EINVAL);
357  goto fail;
358  }
359  }
360  break;
361  }
362 
363  desc = avcodec_descriptor_get(par->codec_id);
364  if (desc && desc->props & AV_CODEC_PROP_REORDER)
365  st->internal->reorder = 1;
366 
367  if (of->codec_tag) {
368  if ( par->codec_tag
369  && par->codec_id == AV_CODEC_ID_RAWVIDEO
370  && ( av_codec_get_tag(of->codec_tag, par->codec_id) == 0
371  || av_codec_get_tag(of->codec_tag, par->codec_id) == MKTAG('r', 'a', 'w', ' '))
372  && !validate_codec_tag(s, st)) {
373  // the current rawvideo encoding system ends up setting
374  // the wrong codec_tag for avi/mov, we override it here
375  par->codec_tag = 0;
376  }
377  if (par->codec_tag) {
378  if (!validate_codec_tag(s, st)) {
379  char tagbuf[32], tagbuf2[32];
380  av_get_codec_tag_string(tagbuf, sizeof(tagbuf), par->codec_tag);
381  av_get_codec_tag_string(tagbuf2, sizeof(tagbuf2), av_codec_get_tag(s->oformat->codec_tag, par->codec_id));
382  av_log(s, AV_LOG_ERROR,
383  "Tag %s/0x%08x incompatible with output codec id '%d' (%s)\n",
384  tagbuf, par->codec_tag, par->codec_id, tagbuf2);
385  ret = AVERROR_INVALIDDATA;
386  goto fail;
387  }
388  } else
389  par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
390  }
391 
394  }
395 
396  if (!s->priv_data && of->priv_data_size > 0) {
398  if (!s->priv_data) {
399  ret = AVERROR(ENOMEM);
400  goto fail;
401  }
402  if (of->priv_class) {
403  *(const AVClass **)s->priv_data = of->priv_class;
405  if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
406  goto fail;
407  }
408  }
409 
410  /* set muxer identification string */
411  if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
412  av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
413  } else {
414  av_dict_set(&s->metadata, "encoder", NULL, 0);
415  }
416 
417  for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
418  av_dict_set(&s->metadata, e->key, NULL, 0);
419  }
420 
421  if (options) {
422  av_dict_free(options);
423  *options = tmp;
424  }
425 
426  if (s->oformat->init && (ret = s->oformat->init(s)) < 0) {
427  if (s->oformat->deinit)
428  s->oformat->deinit(s);
429  goto fail;
430  }
431 
432  return 0;
433 
434 fail:
435  av_dict_free(&tmp);
436  return ret;
437 }
438 
440 {
441  int i;
442  AVStream *st;
443 
444  /* init PTS generation */
445  for (i = 0; i < s->nb_streams; i++) {
446  int64_t den = AV_NOPTS_VALUE;
447  st = s->streams[i];
448 
449  switch (st->codecpar->codec_type) {
450  case AVMEDIA_TYPE_AUDIO:
451  den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
452  break;
453  case AVMEDIA_TYPE_VIDEO:
454  den = (int64_t)st->time_base.num * st->time_base.den;
455  break;
456  default:
457  break;
458  }
459 
460  if (!st->priv_pts)
461  st->priv_pts = av_mallocz(sizeof(*st->priv_pts));
462  if (!st->priv_pts)
463  return AVERROR(ENOMEM);
464 
465  if (den != AV_NOPTS_VALUE) {
466  if (den <= 0)
467  return AVERROR_INVALIDDATA;
468 
469  frac_init(st->priv_pts, 0, 0, den);
470  }
471  }
472 
473  return 0;
474 }
475 
477 {
478  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
480  if (s->oformat->write_header) {
481  int ret = s->oformat->write_header(s);
482  if (ret >= 0 && s->pb && s->pb->error < 0)
483  ret = s->pb->error;
484  s->internal->write_header_ret = ret;
485  if (ret < 0)
486  return ret;
487  if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
488  avio_flush(s->pb);
489  }
490  s->internal->header_written = 1;
491  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
493  return 0;
494 }
495 
497 {
498  int ret = 0;
499 
500  if ((ret = init_muxer(s, options)) < 0)
501  return ret;
502 
503  if (!s->oformat->check_bitstream) {
504  ret = write_header_internal(s);
505  if (ret < 0)
506  goto fail;
507  }
508 
509  if ((ret = init_pts(s)) < 0)
510  goto fail;
511 
512  if (s->avoid_negative_ts < 0) {
515  s->avoid_negative_ts = 0;
516  } else
518  }
519 
520  return 0;
521 
522 fail:
523  if (s->oformat->deinit)
524  s->oformat->deinit(s);
525  return ret;
526 }
527 
528 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
529 
530 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
531  it is only being used internally to this file as a consistency check.
532  The value is chosen to be very unlikely to appear on its own and to cause
533  immediate failure if used anywhere as a real size. */
534 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
535 
536 
537 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
539 //FIXME merge with compute_pkt_fields
540 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
541 {
542  int delay = FFMAX(st->codecpar->video_delay, st->internal->avctx->max_b_frames > 0);
543  int num, den, i;
544  int frame_size;
545 
546  if (!s->internal->missing_ts_warning &&
547  !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
548  (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
550  "Timestamps are unset in a packet for stream %d. "
551  "This is deprecated and will stop working in the future. "
552  "Fix your code to set the timestamps properly\n", st->index);
553  s->internal->missing_ts_warning = 1;
554  }
555 
556  if (s->debug & FF_FDEBUG_TS)
557  av_log(s, AV_LOG_TRACE, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
558  av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
559 
560  if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
561  av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
562  pkt->duration, pkt->stream_index);
563  pkt->duration = 0;
564  }
565 
566  /* duration field */
567  if (pkt->duration == 0) {
568  ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
569  if (den && num) {
570  pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
571  }
572  }
573 
574  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
575  pkt->pts = pkt->dts;
576 
577  //XXX/FIXME this is a temporary hack until all encoders output pts
578  if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
579  static int warned;
580  if (!warned) {
581  av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
582  warned = 1;
583  }
584  pkt->dts =
585 // pkt->pts= st->cur_dts;
586  pkt->pts = st->priv_pts->val;
587  }
588 
589  //calculate dts from pts
590  if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
591  st->pts_buffer[0] = pkt->pts;
592  for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
593  st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
594  for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
595  FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
596 
597  pkt->dts = st->pts_buffer[0];
598  }
599 
600  if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
601  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
604  st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
605  av_log(s, AV_LOG_ERROR,
606  "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
607  st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
608  return AVERROR(EINVAL);
609  }
610  if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
611  av_log(s, AV_LOG_ERROR,
612  "pts (%s) < dts (%s) in stream %d\n",
613  av_ts2str(pkt->pts), av_ts2str(pkt->dts),
614  st->index);
615  return AVERROR(EINVAL);
616  }
617 
618  if (s->debug & FF_FDEBUG_TS)
619  av_log(s, AV_LOG_TRACE, "av_write_frame: pts2:%s dts2:%s\n",
620  av_ts2str(pkt->pts), av_ts2str(pkt->dts));
621 
622  st->cur_dts = pkt->dts;
623  st->priv_pts->val = pkt->dts;
624 
625  /* update pts */
626  switch (st->codecpar->codec_type) {
627  case AVMEDIA_TYPE_AUDIO:
628  frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
629  ((AVFrame *)pkt->data)->nb_samples :
630  av_get_audio_frame_duration(st->codec, pkt->size);
631 
632  /* HACK/FIXME, we skip the initial 0 size packets as they are most
633  * likely equal to the encoder delay, but it would be better if we
634  * had the real timestamps from the encoder */
635  if (frame_size >= 0 && (pkt->size || st->priv_pts->num != st->priv_pts->den >> 1 || st->priv_pts->val)) {
636  frac_add(st->priv_pts, (int64_t)st->time_base.den * frame_size);
637  }
638  break;
639  case AVMEDIA_TYPE_VIDEO:
640  frac_add(st->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
641  break;
642  }
643  return 0;
644 }
646 #endif
647 
648 /**
649  * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
650  * sidedata.
651  *
652  * FIXME: this function should NEVER get undefined pts/dts beside when the
653  * AVFMT_NOTIMESTAMPS is set.
654  * Those additional safety checks should be dropped once the correct checks
655  * are set in the callers.
656  */
658 {
659  int ret, did_split;
660  int64_t pts_backup, dts_backup;
661 
662  pts_backup = pkt->pts;
663  dts_backup = pkt->dts;
664 
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->dts),
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  did_split = av_packet_split_side_data(pkt);
723 
724  if (!s->internal->header_written) {
726  if (ret < 0)
727  goto fail;
728  }
729 
730  if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
731  AVFrame *frame = (AVFrame *)pkt->data;
733  ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
734  av_frame_free(&frame);
735  } else {
736  ret = s->oformat->write_packet(s, pkt);
737  }
738 
739  if (s->pb && ret >= 0) {
741  avio_flush(s->pb);
742  if (s->pb->error < 0)
743  ret = s->pb->error;
744  }
745 
746 fail:
747  if (did_split)
749 
750  if (ret < 0) {
751  pkt->pts = pts_backup;
752  pkt->dts = dts_backup;
753  }
754 
755  return ret;
756 }
757 
759 {
760  if (!pkt)
761  return 0;
762 
763  if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
764  av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
765  pkt->stream_index);
766  return AVERROR(EINVAL);
767  }
768 
770  av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
771  return AVERROR(EINVAL);
772  }
773 
774  return 0;
775 }
776 
778 {
779  int ret;
780 
781  ret = check_packet(s, pkt);
782  if (ret < 0)
783  return ret;
784 
785 #if !FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
786  /* sanitize the timestamps */
787  if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
788  AVStream *st = s->streams[pkt->stream_index];
789 
790  /* when there is no reordering (so dts is equal to pts), but
791  * only one of them is set, set the other as well */
792  if (!st->internal->reorder) {
793  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
794  pkt->pts = pkt->dts;
795  if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
796  pkt->dts = pkt->pts;
797  }
798 
799  /* check that the timestamps are set */
800  if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
801  av_log(s, AV_LOG_ERROR,
802  "Timestamps are unset in a packet for stream %d\n", st->index);
803  return AVERROR(EINVAL);
804  }
805 
806  /* check that the dts are increasing (or at least non-decreasing,
807  * if the format allows it */
808  if (st->cur_dts != AV_NOPTS_VALUE &&
809  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
810  st->cur_dts > pkt->dts)) {
811  av_log(s, AV_LOG_ERROR,
812  "Application provided invalid, non monotonically increasing "
813  "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
814  st->index, st->cur_dts, pkt->dts);
815  return AVERROR(EINVAL);
816  }
817 
818  if (pkt->pts < pkt->dts) {
819  av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
820  pkt->pts, pkt->dts, st->index);
821  return AVERROR(EINVAL);
822  }
823  }
824 #endif
825 
826  return 0;
827 }
828 
830  AVStream *st = s->streams[pkt->stream_index];
831  int i, ret;
832 
833  if (s->oformat->check_bitstream) {
834  if (!st->internal->bitstream_checked) {
835  if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
836  return ret;
837  else if (ret == 1)
838  st->internal->bitstream_checked = 1;
839  }
840  }
841 
842  for (i = 0; i < st->internal->nb_bsfcs; i++) {
843  AVBSFContext *ctx = st->internal->bsfcs[i];
844  if (i > 0) {
845  AVBSFContext* prev_ctx = st->internal->bsfcs[i - 1];
846  if (prev_ctx->par_out->extradata_size != ctx->par_in->extradata_size) {
847  if ((ret = avcodec_parameters_copy(ctx->par_in, prev_ctx->par_out)) < 0)
848  return ret;
849  }
850  }
851  // TODO: when any bitstream filter requires flushing at EOF, we'll need to
852  // flush each stream's BSF chain on write_trailer.
853  if ((ret = av_bsf_send_packet(ctx, pkt)) < 0) {
854  av_log(ctx, AV_LOG_ERROR,
855  "Failed to send packet to filter %s for stream %d",
856  ctx->filter->name, pkt->stream_index);
857  return ret;
858  }
859  // TODO: when any automatically-added bitstream filter is generating multiple
860  // output packets for a single input one, we'll need to call this in a loop
861  // and write each output packet.
862  if ((ret = av_bsf_receive_packet(ctx, pkt)) < 0) {
863  if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
864  return 0;
865  av_log(ctx, AV_LOG_ERROR,
866  "Failed to send packet to filter %s for stream %d",
867  ctx->filter->name, pkt->stream_index);
868  return ret;
869  }
870  if (i == st->internal->nb_bsfcs - 1) {
871  if (ctx->par_out->extradata_size != st->codecpar->extradata_size) {
872  if ((ret = avcodec_parameters_copy(st->codecpar, ctx->par_out)) < 0)
873  return ret;
874  }
875  }
876  }
877  return 1;
878 }
879 
881 {
882  int ret;
883 
884  ret = prepare_input_packet(s, pkt);
885  if (ret < 0)
886  return ret;
887 
888  if (!pkt) {
889  if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
890  if (!s->internal->header_written) {
892  if (ret < 0)
893  return ret;
894  }
895  ret = s->oformat->write_packet(s, NULL);
896  if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
897  avio_flush(s->pb);
898  if (ret >= 0 && s->pb && s->pb->error < 0)
899  ret = s->pb->error;
900  return ret;
901  }
902  return 1;
903  }
904 
905  ret = do_packet_auto_bsf(s, pkt);
906  if (ret <= 0)
907  return ret;
908 
909 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
910  ret = compute_muxer_pkt_fields(s, s->streams[pkt->stream_index], pkt);
911 
912  if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
913  return ret;
914 #endif
915 
916  ret = write_packet(s, pkt);
917  if (ret >= 0 && s->pb && s->pb->error < 0)
918  ret = s->pb->error;
919 
920  if (ret >= 0)
921  s->streams[pkt->stream_index]->nb_frames++;
922  return ret;
923 }
924 
925 #define CHUNK_START 0x1000
926 
928  int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
929 {
930  int ret;
931  AVPacketList **next_point, *this_pktl;
932  AVStream *st = s->streams[pkt->stream_index];
933  int chunked = s->max_chunk_size || s->max_chunk_duration;
934 
935  this_pktl = av_mallocz(sizeof(AVPacketList));
936  if (!this_pktl)
937  return AVERROR(ENOMEM);
938  if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
940  av_assert0(((AVFrame *)pkt->data)->buf);
941  this_pktl->pkt = *pkt;
942  pkt->buf = NULL;
943  pkt->side_data = NULL;
944  pkt->side_data_elems = 0;
945  } else {
946  if ((ret = av_packet_ref(&this_pktl->pkt, pkt)) < 0) {
947  av_free(this_pktl);
948  return ret;
949  }
950  }
951 
953  next_point = &(st->last_in_packet_buffer->next);
954  } else {
955  next_point = &s->internal->packet_buffer;
956  }
957 
958  if (chunked) {
960  st->interleaver_chunk_size += pkt->size;
963  || (max && st->interleaver_chunk_duration > max)) {
964  st->interleaver_chunk_size = 0;
965  this_pktl->pkt.flags |= CHUNK_START;
966  if (max && st->interleaver_chunk_duration > max) {
967  int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
968  int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
969 
970  st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
971  } else
973  }
974  }
975  if (*next_point) {
976  if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
977  goto next_non_null;
978 
979  if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
980  while ( *next_point
981  && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
982  || !compare(s, &(*next_point)->pkt, pkt)))
983  next_point = &(*next_point)->next;
984  if (*next_point)
985  goto next_non_null;
986  } else {
987  next_point = &(s->internal->packet_buffer_end->next);
988  }
989  }
990  av_assert1(!*next_point);
991 
992  s->internal->packet_buffer_end = this_pktl;
993 next_non_null:
994 
995  this_pktl->next = *next_point;
996 
998  *next_point = this_pktl;
999 
1000  av_packet_unref(pkt);
1001 
1002  return 0;
1003 }
1004 
1006  AVPacket *pkt)
1007 {
1008  AVStream *st = s->streams[pkt->stream_index];
1009  AVStream *st2 = s->streams[next->stream_index];
1010  int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
1011  st->time_base);
1013  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);
1014  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);
1015  if (ts == ts2) {
1016  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
1017  -( 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;
1018  ts2=0;
1019  }
1020  comp= (ts>ts2) - (ts<ts2);
1021  }
1022 
1023  if (comp == 0)
1024  return pkt->stream_index < next->stream_index;
1025  return comp > 0;
1026 }
1027 
1029  AVPacket *pkt, int flush)
1030 {
1031  AVPacketList *pktl;
1032  int stream_count = 0;
1033  int noninterleaved_count = 0;
1034  int i, ret;
1035 
1036  if (pkt) {
1037  if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
1038  return ret;
1039  }
1040 
1041  for (i = 0; i < s->nb_streams; i++) {
1042  if (s->streams[i]->last_in_packet_buffer) {
1043  ++stream_count;
1044  } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
1047  ++noninterleaved_count;
1048  }
1049  }
1050 
1051  if (s->internal->nb_interleaved_streams == stream_count)
1052  flush = 1;
1053 
1054  if (s->max_interleave_delta > 0 &&
1055  s->internal->packet_buffer &&
1056  !flush &&
1057  s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
1058  ) {
1059  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1060  int64_t delta_dts = INT64_MIN;
1061  int64_t top_dts = av_rescale_q(top_pkt->dts,
1062  s->streams[top_pkt->stream_index]->time_base,
1063  AV_TIME_BASE_Q);
1064 
1065  for (i = 0; i < s->nb_streams; i++) {
1066  int64_t last_dts;
1067  const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
1068 
1069  if (!last)
1070  continue;
1071 
1072  last_dts = av_rescale_q(last->pkt.dts,
1073  s->streams[i]->time_base,
1074  AV_TIME_BASE_Q);
1075  delta_dts = FFMAX(delta_dts, last_dts - top_dts);
1076  }
1077 
1078  if (delta_dts > s->max_interleave_delta) {
1079  av_log(s, AV_LOG_DEBUG,
1080  "Delay between the first packet and last packet in the "
1081  "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
1082  delta_dts, s->max_interleave_delta);
1083  flush = 1;
1084  }
1085  }
1086 
1087  if (stream_count && flush) {
1088  AVStream *st;
1089  pktl = s->internal->packet_buffer;
1090  *out = pktl->pkt;
1091  st = s->streams[out->stream_index];
1092 
1093  s->internal->packet_buffer = pktl->next;
1094  if (!s->internal->packet_buffer)
1096 
1097  if (st->last_in_packet_buffer == pktl)
1099  av_freep(&pktl);
1100 
1101  return 1;
1102  } else {
1103  av_init_packet(out);
1104  return 0;
1105  }
1106 }
1107 
1108 const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream, int64_t *ts_offset)
1109 {
1110  AVPacketList *pktl = s->internal->packet_buffer;
1111  while (pktl) {
1112  if (pktl->pkt.stream_index == stream) {
1113  AVPacket *pkt = &pktl->pkt;
1114  AVStream *st = s->streams[pkt->stream_index];
1115  *ts_offset = st->mux_ts_offset;
1116 
1117  if (s->output_ts_offset)
1118  *ts_offset += av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
1119 
1120  return pkt;
1121  }
1122  pktl = pktl->next;
1123  }
1124  return NULL;
1125 }
1126 
1127 /**
1128  * Interleave an AVPacket correctly so it can be muxed.
1129  * @param out the interleaved packet will be output here
1130  * @param in the input packet
1131  * @param flush 1 if no further packets are available as input and all
1132  * remaining packets should be output
1133  * @return 1 if a packet was output, 0 if no packet could be output,
1134  * < 0 if an error occurred
1135  */
1137 {
1138  if (s->oformat->interleave_packet) {
1139  int ret = s->oformat->interleave_packet(s, out, in, flush);
1140  if (in)
1141  av_packet_unref(in);
1142  return ret;
1143  } else
1144  return ff_interleave_packet_per_dts(s, out, in, flush);
1145 }
1146 
1148 {
1149  int ret, flush = 0;
1150 
1151  ret = prepare_input_packet(s, pkt);
1152  if (ret < 0)
1153  goto fail;
1154 
1155  if (pkt) {
1156  AVStream *st = s->streams[pkt->stream_index];
1157 
1158  ret = do_packet_auto_bsf(s, pkt);
1159  if (ret == 0)
1160  return 0;
1161  else if (ret < 0)
1162  goto fail;
1163 
1164  if (s->debug & FF_FDEBUG_TS)
1165  av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
1166  pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1167 
1168 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
1169  if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1170  goto fail;
1171 #endif
1172 
1173  if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
1174  ret = AVERROR(EINVAL);
1175  goto fail;
1176  }
1177  } else {
1178  av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1179  flush = 1;
1180  }
1181 
1182  for (;; ) {
1183  AVPacket opkt;
1184  int ret = interleave_packet(s, &opkt, pkt, flush);
1185  if (pkt) {
1186  memset(pkt, 0, sizeof(*pkt));
1187  av_init_packet(pkt);
1188  pkt = NULL;
1189  }
1190  if (ret <= 0) //FIXME cleanup needed for ret<0 ?
1191  return ret;
1192 
1193  ret = write_packet(s, &opkt);
1194  if (ret >= 0)
1195  s->streams[opkt.stream_index]->nb_frames++;
1196 
1197  av_packet_unref(&opkt);
1198 
1199  if (ret < 0)
1200  return ret;
1201  if(s->pb && s->pb->error)
1202  return s->pb->error;
1203  }
1204 fail:
1205  av_packet_unref(pkt);
1206  return ret;
1207 }
1208 
1210 {
1211  int ret, i;
1212 
1213  for (;; ) {
1214  AVPacket pkt;
1215  ret = interleave_packet(s, &pkt, NULL, 1);
1216  if (ret < 0)
1217  goto fail;
1218  if (!ret)
1219  break;
1220 
1221  ret = write_packet(s, &pkt);
1222  if (ret >= 0)
1223  s->streams[pkt.stream_index]->nb_frames++;
1224 
1225  av_packet_unref(&pkt);
1226 
1227  if (ret < 0)
1228  goto fail;
1229  if(s->pb && s->pb->error)
1230  goto fail;
1231  }
1232 
1233  if (!s->internal->header_written) {
1235  if (ret < 0)
1236  goto fail;
1237  }
1238 
1239 fail:
1240  if (s->internal->header_written && s->oformat->write_trailer) {
1241  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1243  if (ret >= 0) {
1244  ret = s->oformat->write_trailer(s);
1245  } else {
1246  s->oformat->write_trailer(s);
1247  }
1248  }
1249 
1250  if (s->oformat->deinit)
1251  s->oformat->deinit(s);
1252 
1253  if (s->pb)
1254  avio_flush(s->pb);
1255  if (ret == 0)
1256  ret = s->pb ? s->pb->error : 0;
1257  for (i = 0; i < s->nb_streams; i++) {
1258  av_freep(&s->streams[i]->priv_data);
1259  av_freep(&s->streams[i]->index_entries);
1260  }
1261  if (s->oformat->priv_class)
1262  av_opt_free(s->priv_data);
1263  av_freep(&s->priv_data);
1264  return ret;
1265 }
1266 
1267 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1268  int64_t *dts, int64_t *wall)
1269 {
1270  if (!s->oformat || !s->oformat->get_output_timestamp)
1271  return AVERROR(ENOSYS);
1272  s->oformat->get_output_timestamp(s, stream, dts, wall);
1273  return 0;
1274 }
1275 
1276 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1278 {
1279  AVPacket local_pkt;
1280  int ret;
1281 
1282  local_pkt = *pkt;
1283  local_pkt.stream_index = dst_stream;
1284  if (pkt->pts != AV_NOPTS_VALUE)
1285  local_pkt.pts = av_rescale_q(pkt->pts,
1286  src->streams[pkt->stream_index]->time_base,
1287  dst->streams[dst_stream]->time_base);
1288  if (pkt->dts != AV_NOPTS_VALUE)
1289  local_pkt.dts = av_rescale_q(pkt->dts,
1290  src->streams[pkt->stream_index]->time_base,
1291  dst->streams[dst_stream]->time_base);
1292  if (pkt->duration)
1293  local_pkt.duration = av_rescale_q(pkt->duration,
1294  src->streams[pkt->stream_index]->time_base,
1295  dst->streams[dst_stream]->time_base);
1296 
1297  if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1298  else ret = av_write_frame(dst, &local_pkt);
1299  pkt->buf = local_pkt.buf;
1300  pkt->side_data = local_pkt.side_data;
1301  pkt->side_data_elems = local_pkt.side_data_elems;
1302  return ret;
1303 }
1304 
1305 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1306  AVFrame *frame, int interleaved)
1307 {
1308  AVPacket pkt, *pktp;
1309 
1310  av_assert0(s->oformat);
1311  if (!s->oformat->write_uncoded_frame)
1312  return AVERROR(ENOSYS);
1313 
1314  if (!frame) {
1315  pktp = NULL;
1316  } else {
1317  pktp = &pkt;
1318  av_init_packet(&pkt);
1319  pkt.data = (void *)frame;
1321  pkt.pts =
1322  pkt.dts = frame->pts;
1323  pkt.duration = av_frame_get_pkt_duration(frame);
1324  pkt.stream_index = stream_index;
1326  }
1327 
1328  return interleaved ? av_interleaved_write_frame(s, pktp) :
1329  av_write_frame(s, pktp);
1330 }
1331 
1332 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1333  AVFrame *frame)
1334 {
1335  return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1336 }
1337 
1339  AVFrame *frame)
1340 {
1341  return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1342 }
1343 
1345 {
1346  av_assert0(s->oformat);
1347  if (!s->oformat->write_uncoded_frame)
1348  return AVERROR(ENOSYS);
1349  return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1351 }
#define AV_CODEC_PROP_REORDER
Codec supports frame reordering.
Definition: avcodec.h:713
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:1101
enum AVChromaLocation chroma_location
Definition: avcodec.h:4043
#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:4034
int audio_preload
Audio preload in microseconds.
Definition: avformat.h:1649
const char * s
Definition: avisynth_c.h:768
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
AVCodecParameters * par_out
Parameters of the output stream.
Definition: avcodec.h:5739
int64_t av_frame_get_pkt_duration(const AVFrame *frame)
static int check_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mux.c:758
enum AVCodecID id
Definition: internal.h:45
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2263
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:480
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file ensuring correct interleaving.
Definition: mux.c:1147
int bitstream_checked
Whether or not check_bitstream should still be run on each packet.
Definition: internal.h:148
static void flush(AVCodecContext *avctx)
int(* init)(struct AVFormatContext *)
Initialize format.
Definition: avformat.h:632
int flush_packets
Flush the I/O context after each packet.
Definition: avformat.h:1716
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:880
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
void(* deinit)(struct AVFormatContext *)
Deinitialize format.
Definition: avformat.h:641
int reorder
Set to 1 if the codec allows reordering, so pts can be different from dts.
Definition: internal.h:135
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4504
int64_t pts_buffer[MAX_REORDER_DELAY+1]
Definition: avformat.h:1074
const char * desc
Definition: nvenc.c:89
int max_b_frames
maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 re...
Definition: avcodec.h:1945
AVRational sample_aspect_ratio
Video only.
Definition: avcodec.h:4029
struct FFFrac * priv_pts
Definition: avformat.h:1213
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1264
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3953
const struct AVBitStreamFilter * filter
The bitstream filter this context is an instance of.
Definition: avcodec.h:5717
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:945
int num
Numerator.
Definition: rational.h:59
The bitstream filter state.
Definition: avcodec.h:5708
int index
stream index in AVFormatContext
Definition: avformat.h:879
int size
Definition: avcodec.h:1591
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:1028
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1076
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:647
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1754
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:1267
int64_t offset
Offset to remap timestamps to be non-negative.
Definition: internal.h:108
void * priv_data
Definition: avformat.h:893
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
Put a string representing the codec tag codec_tag in buf.
Definition: utils.c:3101
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
int avoid_negative_ts_use_pts
Definition: internal.h:121
int(* write_packet)(struct AVFormatContext *, AVPacket *pkt)
Write a packet.
Definition: avformat.h:575
static AVPacket pkt
int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
Test whether a muxer supports uncoded frame.
Definition: mux.c:1344
#define AVFMT_ALLOW_FLUSH
Format allows flushing.
Definition: avformat.h:495
static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index, AVFrame *frame, int interleaved)
Definition: mux.c:1305
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1609
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:496
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3945
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:1276
Trailer data, which doesn't contain actual content, but only for finalizing the output file...
Definition: avio.h:132
Format I/O context.
Definition: avformat.h:1327
int64_t output_ts_offset
Output timestamp offset, in microseconds.
Definition: avformat.h:1818
int64_t cur_dts
Definition: avformat.h:1050
#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:925
Public dictionary API.
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:199
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:543
Round toward +infinity.
Definition: mathematics.h:83
Opaque data information usually continuous.
Definition: avutil.h:197
int width
Video only.
Definition: avcodec.h:4019
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:63
AVOptions.
timestamp utils, mostly useful for debugging/logging purposes
Query whether the feature is possible on this stream.
Definition: internal.h:557
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
AVPacket pkt
Definition: avformat.h:1935
int priv_data_size
size of private data so that it can be allocated in the wrapper
Definition: avformat.h:565
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:1608
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:268
void avio_write_marker(AVIOContext *s, int64_t time, enum AVIODataMarkerType type)
Mark the written bytestream as a specific type.
Definition: aviobuf.c:470
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1395
int avcodec_parameters_to_context(AVCodecContext *codec, const AVCodecParameters *par)
Fill the codec context based on the values from the supplied codec parameters.
Definition: utils.c:4140
static AVFrame * frame
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:132
const char * name
Definition: avcodec.h:5755
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:856
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:1438
uint8_t * data
Definition: avcodec.h:1590
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:1603
int header_written
Whether or not a header has already been written.
Definition: internal.h:126
uint32_t tag
Definition: movenc.c:1376
#define AVERROR_EOF
End of file.
Definition: error.h:55
int write_header_ret
Definition: internal.h:127
struct AVPacketList * packet_buffer
This buffer is only needed when packets were already buffered but not decoded, for example to get the...
Definition: internal.h:78
static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
Interleave an AVPacket correctly so it can be muxed.
Definition: mux.c:1136
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1455
const OptionDef options[]
Definition: ffserver.c:3969
int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat, const char *format, const char *filename)
Allocate an AVFormatContext for an output format.
Definition: mux.c:148
#define av_log(a,...)
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1346
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
Definition: avpacket.c:572
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
#define AVFMT_FLAG_FLUSH_PACKETS
Flush the AVIOContext every packet.
Definition: avformat.h:1448
int(* write_uncoded_frame)(struct AVFormatContext *, int stream_index, AVFrame **frame, unsigned flags)
Write an uncoded AVFrame.
Definition: avformat.h:607
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:191
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:4065
#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:1541
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:3452
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
static int validate_codec_tag(AVFormatContext *s, AVStream *st)
Definition: mux.c:201
#define AVERROR(e)
Definition: error.h:43
#define AV_PKT_FLAG_UNCODED_FRAME
Definition: mux.c:528
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:153
int(* write_header)(struct AVFormatContext *)
Definition: avformat.h:567
int video_delay
Video only.
Definition: avcodec.h:4048
#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
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3949
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1573
simple assert() macros that are a bit more flexible than ISO C assert().
int side_data_elems
Definition: avcodec.h:1602
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
#define FFMAX(a, b)
Definition: common.h:94
int64_t val
Definition: internal.h:62
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:82
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1596
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:2971
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 extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3971
int av_packet_merge_side_data(AVPacket *pkt)
Definition: avpacket.c:376
int props
Codec properties, a combination of AV_CODEC_PROP_* flags.
Definition: avcodec.h:675
static int write_packet(AVFormatContext *s, AVPacket *pkt)
Make timestamps non negative, move side data from payload to internal struct, call muxer...
Definition: mux.c:657
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1383
AVBSFContext ** bsfcs
bitstream filters to run on stream
Definition: internal.h:142
#define LIBAVFORMAT_IDENT
Definition: version.h:46
int block_align
Audio only.
Definition: avcodec.h:4070
This is any, unlabelled data.
Definition: avio.h:127
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:224
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:885
char filename[1024]
input or output filename
Definition: avformat.h:1403
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:248
int avformat_write_header(AVFormatContext *s, AVDictionary **options)
Allocate the stream private data and write the stream header to an output media file.
Definition: mux.c:496
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:556
ITU-R 601, SMPTE 274M 296M S314M(DV 4:1:1), mpeg2 4:2:2.
Definition: pixfmt.h:482
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:176
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:1632
static void frac_init(FFFrac *f, int64_t val, int64_t num, int64_t den)
f = val + (num / den) + 0.5.
Definition: mux.c:64
int n
Definition: avisynth_c.h: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:194
static int init_muxer(AVFormatContext *s, AVDictionary **options)
Definition: mux.c:235
Opaque data information usually sparse.
Definition: avutil.h:199
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:591
#define src
Definition: vp9dsp.c:530
const AVClass * priv_class
AVClass for the private context.
Definition: avformat.h:552
int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)
Set all the options from a given dictionary on an object.
Definition: opt.c:1536
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:196
int av_packet_split_side_data(AVPacket *pkt)
Definition: avpacket.c:411
Stream structure.
Definition: avformat.h:878
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:486
#define FF_FDEBUG_TS
Definition: avformat.h:1585
int frame_size
Definition: mxfenc.c:1822
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1219
int debug
Flags to enable debugging.
Definition: avformat.h:1584
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:254
int av_opt_set_dict(void *obj, AVDictionary **options)
Set all the options from a given dictionary on an object.
Definition: opt.c:1561
AVIOContext * pb
I/O context.
Definition: avformat.h:1369
const struct AVCodecTag *const * codec_tag
List of supported codec_id-codec_tag pairs, ordered by "better choice first".
Definition: avformat.h:549
int64_t den
Definition: internal.h:62
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:563
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
const AVPacket * ff_interleaved_peek(AVFormatContext *s, int stream, int64_t *ts_offset)
Find the next packet in the interleaving queue for the given stream.
Definition: mux.c:1108
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:534
int nb_interleaved_streams
Number of streams relevant for interleaving.
Definition: internal.h:71
static const char * format
Definition: movenc.c:47
Describe the class of an AVClass context structure.
Definition: log.h:67
#define FF_COMPLIANCE_NORMAL
Definition: avcodec.h:2880
unsigned int avpriv_toupper4(unsigned int x)
Definition: utils.c:3839
Rational number (pair of numerator and denominator).
Definition: rational.h:58
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:4083
int(* interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush)
Currently only used to set pixel format if not YUV420P.
Definition: avformat.h:580
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:829
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:1633
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4073
int error
contains the error code or 0 if no error happened
Definition: avio.h:228
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
Return audio frame duration.
Definition: utils.c:3654
misc parsing utilities
static void interleave(short *output, short **input, int channels, int samples)
Definition: resample.c:161
This struct describes the properties of a single codec described by an AVCodecID. ...
Definition: avcodec.h:659
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:4063
int64_t interleaver_chunk_duration
Definition: avformat.h:1102
#define AVFMT_AVOID_NEG_TS_MAKE_ZERO
Shift timestamps so that they start at 0.
Definition: avformat.h:1635
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:1601
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:927
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1516
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:80
int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index, AVFrame *frame)
Write an uncoded frame to an output media file.
Definition: mux.c:1338
common internal api header.
struct AVPacketList * next
Definition: avformat.h:1936
if(ret< 0)
Definition: vf_mcdeint.c:282
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:478
#define AVFMT_NOSTREAMS
Format does not require any streams.
Definition: avformat.h:491
static int write_header_internal(AVFormatContext *s)
Definition: mux.c:476
int max_chunk_size
Max chunk size in bytes Note, not all formats support this and unpredictable things may happen if it ...
Definition: avformat.h:1665
static void frac_add(FFFrac *f, int64_t incr)
Fractional addition to f: f = f + (incr / f->den).
Definition: mux.c:82
static int init_pts(AVFormatContext *s)
Definition: mux.c:439
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:934
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:1332
int64_t mux_ts_offset
Timestamp offset added to timestamps before muxing NOT PART OF PUBLIC API.
Definition: avformat.h:1157
#define AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE
Shift timestamps so they are non negative.
Definition: avformat.h:1634
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:1005
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:81
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:54
static uint8_t tmp[8]
Definition: des.c:38
int max_chunk_duration
Max chunk time in microseconds.
Definition: avformat.h:1657
void * priv_data
Format private data.
Definition: avformat.h:1355
#define AVFMT_NODIMENSIONS
Format does not need width/height.
Definition: avformat.h:490
int channels
Audio only.
Definition: avcodec.h:4059
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:153
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1589
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1209
FILE * out
Definition: movenc.c:54
#define av_freep(p)
static void comp(unsigned char *dst, int dst_stride, unsigned char *src, int src_stride, int add)
Definition: eamad.c:83
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:478
unbuffered private I/O API
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:481
AVCodecParameters * codecpar
Definition: avformat.h:1230
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:3957
#define FFSWAP(type, a, b)
Definition: common.h:99
int stream_index
Definition: avcodec.h:1592
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:915
#define MKTAG(a, b, c, d)
Definition: common.h:342
unsigned int av_codec_get_tag(const struct AVCodecTag *const *tags, enum AVCodecID id)
Get the codec tag for the given codec id id.
#define AVFMT_TS_NEGATIVE
Format allows muxing negative timestamps.
Definition: avformat.h:501
This structure stores compressed data.
Definition: avcodec.h:1567
AVCodecParameters * par_in
Parameters of the input stream.
Definition: avcodec.h:5734
int(* write_trailer)(struct AVFormatContext *)
Definition: avformat.h:576
static int prepare_input_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mux.c:777
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1583
struct AVPacketList * last_in_packet_buffer
last packet in packet_buffer for this stream when muxing.
Definition: avformat.h:1071
Header data; this needs to be present for the stream to be decodeable.
Definition: avio.h:107
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:242