FFmpeg
mux.c
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1 /*
2  * muxing functions for use within FFmpeg
3  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "avformat.h"
23 #include "avio_internal.h"
24 #include "internal.h"
25 #include "libavcodec/internal.h"
26 #include "libavcodec/bytestream.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/timestamp.h"
31 #include "metadata.h"
32 #include "id3v2.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/avstring.h"
35 #include "libavutil/internal.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/parseutils.h"
38 #include "libavutil/time.h"
39 #include "riff.h"
40 #include "audiointerleave.h"
41 #include "url.h"
42 #include <stdarg.h>
43 #if CONFIG_NETWORK
44 #include "network.h"
45 #endif
46 
47 /**
48  * @file
49  * muxing functions for use within libavformat
50  */
51 
52 /* fraction handling */
53 
54 /**
55  * f = val + (num / den) + 0.5.
56  *
57  * 'num' is normalized so that it is such as 0 <= num < den.
58  *
59  * @param f fractional number
60  * @param val integer value
61  * @param num must be >= 0
62  * @param den must be >= 1
63  */
64 static void frac_init(FFFrac *f, int64_t val, int64_t num, int64_t den)
65 {
66  num += (den >> 1);
67  if (num >= den) {
68  val += num / den;
69  num = num % den;
70  }
71  f->val = val;
72  f->num = num;
73  f->den = den;
74 }
75 
76 /**
77  * Fractional addition to f: f = f + (incr / f->den).
78  *
79  * @param f fractional number
80  * @param incr increment, can be positive or negative
81  */
82 static void frac_add(FFFrac *f, int64_t incr)
83 {
84  int64_t num, den;
85 
86  num = f->num + incr;
87  den = f->den;
88  if (num < 0) {
89  f->val += num / den;
90  num = num % den;
91  if (num < 0) {
92  num += den;
93  f->val--;
94  }
95  } else if (num >= den) {
96  f->val += num / den;
97  num = num % den;
98  }
99  f->num = num;
100 }
101 
103 {
104  AVRational q;
105  int j;
106 
107  q = st->time_base;
108 
109  for (j=2; j<14; j+= 1+(j>2))
110  while (q.den / q.num < min_precision && q.num % j == 0)
111  q.num /= j;
112  while (q.den / q.num < min_precision && q.den < (1<<24))
113  q.den <<= 1;
114 
115  return q;
116 }
117 
119 {
120  AVCodecParameters *par = st->codecpar;
121  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(par->format);
122 
124  return par->chroma_location;
125 
126  if (pix_desc) {
127  if (pix_desc->log2_chroma_h == 0) {
128  return AVCHROMA_LOC_TOPLEFT;
129  } else if (pix_desc->log2_chroma_w == 1 && pix_desc->log2_chroma_h == 1) {
131  switch (par->codec_id) {
132  case AV_CODEC_ID_MJPEG:
134  }
135  }
137  switch (par->codec_id) {
139  }
140  }
141  }
142  }
143 
145 
146 }
147 
149  const char *format, const char *filename)
150 {
152  int ret = 0;
153 
154  *avctx = NULL;
155  if (!s)
156  goto nomem;
157 
158  if (!oformat) {
159  if (format) {
160  oformat = av_guess_format(format, NULL, NULL);
161  if (!oformat) {
162  av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
163  ret = AVERROR(EINVAL);
164  goto error;
165  }
166  } else {
167  oformat = av_guess_format(NULL, filename, NULL);
168  if (!oformat) {
169  ret = AVERROR(EINVAL);
170  av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
171  filename);
172  goto error;
173  }
174  }
175  }
176 
177  s->oformat = oformat;
178  if (s->oformat->priv_data_size > 0) {
180  if (!s->priv_data)
181  goto nomem;
182  if (s->oformat->priv_class) {
183  *(const AVClass**)s->priv_data= s->oformat->priv_class;
185  }
186  } else
187  s->priv_data = NULL;
188 
189  if (filename) {
190 #if FF_API_FORMAT_FILENAME
192  av_strlcpy(s->filename, filename, sizeof(s->filename));
194 #endif
195  if (!(s->url = av_strdup(filename)))
196  goto nomem;
197 
198  }
199  *avctx = s;
200  return 0;
201 nomem:
202  av_log(s, AV_LOG_ERROR, "Out of memory\n");
203  ret = AVERROR(ENOMEM);
204 error:
206  return ret;
207 }
208 
210 {
211  const AVCodecTag *avctag;
212  int n;
213  enum AVCodecID id = AV_CODEC_ID_NONE;
214  int64_t tag = -1;
215 
216  /**
217  * Check that tag + id is in the table
218  * If neither is in the table -> OK
219  * If tag is in the table with another id -> FAIL
220  * If id is in the table with another tag -> FAIL unless strict < normal
221  */
222  for (n = 0; s->oformat->codec_tag[n]; n++) {
223  avctag = s->oformat->codec_tag[n];
224  while (avctag->id != AV_CODEC_ID_NONE) {
225  if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codecpar->codec_tag)) {
226  id = avctag->id;
227  if (id == st->codecpar->codec_id)
228  return 1;
229  }
230  if (avctag->id == st->codecpar->codec_id)
231  tag = avctag->tag;
232  avctag++;
233  }
234  }
235  if (id != AV_CODEC_ID_NONE)
236  return 0;
237  if (tag >= 0 && (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
238  return 0;
239  return 1;
240 }
241 
242 
244 {
245  int ret = 0, i;
246  AVStream *st;
247  AVDictionary *tmp = NULL;
248  AVCodecParameters *par = NULL;
249  const AVOutputFormat *of = s->oformat;
250  const AVCodecDescriptor *desc;
252 
253  if (options)
254  av_dict_copy(&tmp, *options, 0);
255 
256  if ((ret = av_opt_set_dict(s, &tmp)) < 0)
257  goto fail;
258  if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
259  (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
260  goto fail;
261 
262 #if FF_API_FORMAT_FILENAME
264  if (!s->url && !(s->url = av_strdup(s->filename))) {
266 #else
267  if (!s->url && !(s->url = av_strdup(""))) {
268 #endif
269  ret = AVERROR(ENOMEM);
270  goto fail;
271  }
272 
273 #if FF_API_LAVF_AVCTX
275  if (s->nb_streams && s->streams[0]->codec->flags & AV_CODEC_FLAG_BITEXACT) {
276  if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
278  "The AVFormatContext is not in set to bitexact mode, only "
279  "the AVCodecContext. If this is not intended, set "
280  "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
281  }
282  }
284 #endif
285 
286  // some sanity checks
287  if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
288  av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
289  ret = AVERROR(EINVAL);
290  goto fail;
291  }
292 
293  for (i = 0; i < s->nb_streams; i++) {
294  st = s->streams[i];
295  par = st->codecpar;
296 
297 #if FF_API_LAVF_AVCTX
300  st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) {
301  av_log(s, AV_LOG_WARNING, "Using AVStream.codec to pass codec "
302  "parameters to muxers is deprecated, use AVStream.codecpar "
303  "instead.\n");
304  ret = avcodec_parameters_from_context(st->codecpar, st->codec);
305  if (ret < 0)
306  goto fail;
307  }
309 #endif
310 
311  if (!st->time_base.num) {
312  /* fall back on the default timebase values */
313  if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)
314  avpriv_set_pts_info(st, 64, 1, par->sample_rate);
315  else
316  avpriv_set_pts_info(st, 33, 1, 90000);
317  }
318 
319  switch (par->codec_type) {
320  case AVMEDIA_TYPE_AUDIO:
321  if (par->sample_rate <= 0) {
322  av_log(s, AV_LOG_ERROR, "sample rate not set\n");
323  ret = AVERROR(EINVAL);
324  goto fail;
325  }
326  if (!par->block_align)
327  par->block_align = par->channels *
328  av_get_bits_per_sample(par->codec_id) >> 3;
329  break;
330  case AVMEDIA_TYPE_VIDEO:
331  if ((par->width <= 0 || par->height <= 0) &&
332  !(of->flags & AVFMT_NODIMENSIONS)) {
333  av_log(s, AV_LOG_ERROR, "dimensions not set\n");
334  ret = AVERROR(EINVAL);
335  goto fail;
336  }
339  ) {
340  if (st->sample_aspect_ratio.num != 0 &&
341  st->sample_aspect_ratio.den != 0 &&
342  par->sample_aspect_ratio.num != 0 &&
343  par->sample_aspect_ratio.den != 0) {
344  av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
345  "(%d/%d) and encoder layer (%d/%d)\n",
348  par->sample_aspect_ratio.den);
349  ret = AVERROR(EINVAL);
350  goto fail;
351  }
352  }
353  break;
354  }
355 
356  desc = avcodec_descriptor_get(par->codec_id);
357  if (desc && desc->props & AV_CODEC_PROP_REORDER)
358  st->internal->reorder = 1;
359 
360  if (of->codec_tag) {
361  if ( par->codec_tag
362  && par->codec_id == AV_CODEC_ID_RAWVIDEO
363  && ( av_codec_get_tag(of->codec_tag, par->codec_id) == 0
364  || av_codec_get_tag(of->codec_tag, par->codec_id) == MKTAG('r', 'a', 'w', ' '))
365  && !validate_codec_tag(s, st)) {
366  // the current rawvideo encoding system ends up setting
367  // the wrong codec_tag for avi/mov, we override it here
368  par->codec_tag = 0;
369  }
370  if (par->codec_tag) {
371  if (!validate_codec_tag(s, st)) {
372  const uint32_t otag = av_codec_get_tag(s->oformat->codec_tag, par->codec_id);
373  av_log(s, AV_LOG_ERROR,
374  "Tag %s incompatible with output codec id '%d' (%s)\n",
375  av_fourcc2str(par->codec_tag), par->codec_id, av_fourcc2str(otag));
376  ret = AVERROR_INVALIDDATA;
377  goto fail;
378  }
379  } else
380  par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
381  }
382 
385  }
386 
387  if (!s->priv_data && of->priv_data_size > 0) {
389  if (!s->priv_data) {
390  ret = AVERROR(ENOMEM);
391  goto fail;
392  }
393  if (of->priv_class) {
394  *(const AVClass **)s->priv_data = of->priv_class;
396  if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
397  goto fail;
398  }
399  }
400 
401  /* set muxer identification string */
402  if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
403  av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
404  } else {
405  av_dict_set(&s->metadata, "encoder", NULL, 0);
406  }
407 
408  for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
409  av_dict_set(&s->metadata, e->key, NULL, 0);
410  }
411 
412  if (options) {
413  av_dict_free(options);
414  *options = tmp;
415  }
416 
417  if (s->oformat->init) {
418  if ((ret = s->oformat->init(s)) < 0) {
419  if (s->oformat->deinit)
420  s->oformat->deinit(s);
421  return ret;
422  }
423  return ret == 0;
424  }
425 
426  return 0;
427 
428 fail:
429  av_dict_free(&tmp);
430  return ret;
431 }
432 
433 static int init_pts(AVFormatContext *s)
434 {
435  int i;
436  AVStream *st;
437 
438  /* init PTS generation */
439  for (i = 0; i < s->nb_streams; i++) {
440  int64_t den = AV_NOPTS_VALUE;
441  st = s->streams[i];
442 
443  switch (st->codecpar->codec_type) {
444  case AVMEDIA_TYPE_AUDIO:
445  den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
446  break;
447  case AVMEDIA_TYPE_VIDEO:
448  den = (int64_t)st->time_base.num * st->time_base.den;
449  break;
450  default:
451  break;
452  }
453 
454  if (!st->internal->priv_pts)
455  st->internal->priv_pts = av_mallocz(sizeof(*st->internal->priv_pts));
456  if (!st->internal->priv_pts)
457  return AVERROR(ENOMEM);
458 
459  if (den != AV_NOPTS_VALUE) {
460  if (den <= 0)
461  return AVERROR_INVALIDDATA;
462 
463  frac_init(st->internal->priv_pts, 0, 0, den);
464  }
465  }
466 
467  if (s->avoid_negative_ts < 0) {
470  s->avoid_negative_ts = 0;
471  } else
473  }
474 
475  return 0;
476 }
477 
479 {
480  if (s->pb && s->pb->error >= 0) {
481  if (s->flush_packets == 1 || s->flags & AVFMT_FLAG_FLUSH_PACKETS)
482  avio_flush(s->pb);
483  else if (s->flush_packets && !(s->oformat->flags & AVFMT_NOFILE))
485  }
486 }
487 
489 {
490  if (s->oformat && s->oformat->deinit && s->internal->initialized)
491  s->oformat->deinit(s);
492  s->internal->initialized =
494 }
495 
497 {
498  int ret = 0;
499 
500  if ((ret = init_muxer(s, options)) < 0)
501  return ret;
502 
503  s->internal->initialized = 1;
505 
506  if (s->oformat->init && ret) {
507  if ((ret = init_pts(s)) < 0)
508  return ret;
509 
511  }
512 
514 }
515 
517 {
518  int ret = 0;
519  int already_initialized = s->internal->initialized;
520  int streams_already_initialized = s->internal->streams_initialized;
521 
522  if (!already_initialized)
523  if ((ret = avformat_init_output(s, options)) < 0)
524  return ret;
525 
526  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
528  if (s->oformat->write_header) {
529  ret = s->oformat->write_header(s);
530  if (ret >= 0 && s->pb && s->pb->error < 0)
531  ret = s->pb->error;
532  if (ret < 0)
533  goto fail;
534  flush_if_needed(s);
535  }
536  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
538 
539  if (!s->internal->streams_initialized) {
540  if ((ret = init_pts(s)) < 0)
541  goto fail;
542  }
543 
544  return streams_already_initialized;
545 
546 fail:
547  deinit_muxer(s);
548  return ret;
549 }
550 
551 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
552 
553 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
554  it is only being used internally to this file as a consistency check.
555  The value is chosen to be very unlikely to appear on its own and to cause
556  immediate failure if used anywhere as a real size. */
557 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
558 
559 
560 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
562 //FIXME merge with compute_pkt_fields
563 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
564 {
565  int delay = FFMAX(st->codecpar->video_delay, st->internal->avctx->max_b_frames > 0);
566  int num, den, i;
567  int frame_size;
568 
569  if (!s->internal->missing_ts_warning &&
570  !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
572  (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
574  "Timestamps are unset in a packet for stream %d. "
575  "This is deprecated and will stop working in the future. "
576  "Fix your code to set the timestamps properly\n", st->index);
577  s->internal->missing_ts_warning = 1;
578  }
579 
580  if (s->debug & FF_FDEBUG_TS)
581  av_log(s, AV_LOG_DEBUG, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
582  av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
583 
584  if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
585  av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
586  pkt->duration, pkt->stream_index);
587  pkt->duration = 0;
588  }
589 
590  /* duration field */
591  if (pkt->duration == 0) {
592  ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
593  if (den && num) {
594  pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
595  }
596  }
597 
598  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
599  pkt->pts = pkt->dts;
600 
601  //XXX/FIXME this is a temporary hack until all encoders output pts
602  if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
603  static int warned;
604  if (!warned) {
605  av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
606  warned = 1;
607  }
608  pkt->dts =
609 // pkt->pts= st->cur_dts;
610  pkt->pts = st->internal->priv_pts->val;
611  }
612 
613  //calculate dts from pts
614  if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
615  st->pts_buffer[0] = pkt->pts;
616  for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
617  st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
618  for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
619  FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
620 
621  pkt->dts = st->pts_buffer[0];
622  }
623 
624  if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
625  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
628  st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
629  av_log(s, AV_LOG_ERROR,
630  "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
631  st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
632  return AVERROR(EINVAL);
633  }
634  if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
635  av_log(s, AV_LOG_ERROR,
636  "pts (%s) < dts (%s) in stream %d\n",
637  av_ts2str(pkt->pts), av_ts2str(pkt->dts),
638  st->index);
639  return AVERROR(EINVAL);
640  }
641 
642  if (s->debug & FF_FDEBUG_TS)
643  av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%s dts2:%s\n",
644  av_ts2str(pkt->pts), av_ts2str(pkt->dts));
645 
646  st->cur_dts = pkt->dts;
647  st->internal->priv_pts->val = pkt->dts;
648 
649  /* update pts */
650  switch (st->codecpar->codec_type) {
651  case AVMEDIA_TYPE_AUDIO:
652  frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
653  ((AVFrame *)pkt->data)->nb_samples :
654  av_get_audio_frame_duration(st->codec, pkt->size);
655 
656  /* HACK/FIXME, we skip the initial 0 size packets as they are most
657  * likely equal to the encoder delay, but it would be better if we
658  * had the real timestamps from the encoder */
659  if (frame_size >= 0 && (pkt->size || st->internal->priv_pts->num != st->internal->priv_pts->den >> 1 || st->internal->priv_pts->val)) {
660  frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * frame_size);
661  }
662  break;
663  case AVMEDIA_TYPE_VIDEO:
664  frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
665  break;
666  }
667  return 0;
668 }
670 #endif
671 
672 /**
673  * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
674  * sidedata.
675  *
676  * FIXME: this function should NEVER get undefined pts/dts beside when the
677  * AVFMT_NOTIMESTAMPS is set.
678  * Those additional safety checks should be dropped once the correct checks
679  * are set in the callers.
680  */
682 {
683  int ret;
684  int64_t pts_backup, dts_backup;
685 
686  pts_backup = pkt->pts;
687  dts_backup = pkt->dts;
688 
689  // If the timestamp offsetting below is adjusted, adjust
690  // ff_interleaved_peek similarly.
691  if (s->output_ts_offset) {
692  AVStream *st = s->streams[pkt->stream_index];
694 
695  if (pkt->dts != AV_NOPTS_VALUE)
696  pkt->dts += offset;
697  if (pkt->pts != AV_NOPTS_VALUE)
698  pkt->pts += offset;
699  }
700 
701  if (s->avoid_negative_ts > 0) {
702  AVStream *st = s->streams[pkt->stream_index];
703  int64_t offset = st->mux_ts_offset;
704  int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
705 
706  if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
707  (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
708  s->internal->offset = -ts;
710  }
711 
712  if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
713  offset = st->mux_ts_offset =
716  st->time_base,
717  AV_ROUND_UP);
718  }
719 
720  if (pkt->dts != AV_NOPTS_VALUE)
721  pkt->dts += offset;
722  if (pkt->pts != AV_NOPTS_VALUE)
723  pkt->pts += offset;
724 
726  if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
727  av_log(s, AV_LOG_WARNING, "failed to avoid negative "
728  "pts %s in stream %d.\n"
729  "Try -avoid_negative_ts 1 as a possible workaround.\n",
730  av_ts2str(pkt->pts),
731  pkt->stream_index
732  );
733  }
734  } else {
735  av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
736  if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
738  "Packets poorly interleaved, failed to avoid negative "
739  "timestamp %s in stream %d.\n"
740  "Try -max_interleave_delta 0 as a possible workaround.\n",
741  av_ts2str(pkt->dts),
742  pkt->stream_index
743  );
744  }
745  }
746  }
747 
748  if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
749  AVFrame *frame = (AVFrame *)pkt->data;
751  ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
752  av_frame_free(&frame);
753  } else {
754  ret = s->oformat->write_packet(s, pkt);
755  }
756 
757  if (s->pb && ret >= 0) {
758  flush_if_needed(s);
759  if (s->pb->error < 0)
760  ret = s->pb->error;
761  }
762 
763  if (ret < 0) {
764  pkt->pts = pts_backup;
765  pkt->dts = dts_backup;
766  }
767 
768  return ret;
769 }
770 
772 {
773  if (!pkt)
774  return 0;
775 
776  if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
777  av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
778  pkt->stream_index);
779  return AVERROR(EINVAL);
780  }
781 
783  av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
784  return AVERROR(EINVAL);
785  }
786 
787  return 0;
788 }
789 
791 {
792  int ret;
793 
794  ret = check_packet(s, pkt);
795  if (ret < 0)
796  return ret;
797 
798 #if !FF_API_COMPUTE_PKT_FIELDS2 || !FF_API_LAVF_AVCTX
799  /* sanitize the timestamps */
800  if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
801  AVStream *st = s->streams[pkt->stream_index];
802 
803  /* when there is no reordering (so dts is equal to pts), but
804  * only one of them is set, set the other as well */
805  if (!st->internal->reorder) {
806  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
807  pkt->pts = pkt->dts;
808  if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
809  pkt->dts = pkt->pts;
810  }
811 
812  /* check that the timestamps are set */
813  if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
814  av_log(s, AV_LOG_ERROR,
815  "Timestamps are unset in a packet for stream %d\n", st->index);
816  return AVERROR(EINVAL);
817  }
818 
819  /* check that the dts are increasing (or at least non-decreasing,
820  * if the format allows it */
821  if (st->cur_dts != AV_NOPTS_VALUE &&
822  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
823  st->cur_dts > pkt->dts)) {
824  av_log(s, AV_LOG_ERROR,
825  "Application provided invalid, non monotonically increasing "
826  "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
827  st->index, st->cur_dts, pkt->dts);
828  return AVERROR(EINVAL);
829  }
830 
831  if (pkt->pts < pkt->dts) {
832  av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
833  pkt->pts, pkt->dts, st->index);
834  return AVERROR(EINVAL);
835  }
836  }
837 #endif
838 
839  return 0;
840 }
841 
843  AVStream *st = s->streams[pkt->stream_index];
844  int i, ret;
845 
846  if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
847  return 1;
848 
849  if (s->oformat->check_bitstream) {
850  if (!st->internal->bitstream_checked) {
851  if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
852  return ret;
853  else if (ret == 1)
854  st->internal->bitstream_checked = 1;
855  }
856  }
857 
858  for (i = 0; i < st->internal->nb_bsfcs; i++) {
859  AVBSFContext *ctx = st->internal->bsfcs[i];
860  // TODO: when any bitstream filter requires flushing at EOF, we'll need to
861  // flush each stream's BSF chain on write_trailer.
862  if ((ret = av_bsf_send_packet(ctx, pkt)) < 0) {
863  av_log(ctx, AV_LOG_ERROR,
864  "Failed to send packet to filter %s for stream %d\n",
865  ctx->filter->name, pkt->stream_index);
866  return ret;
867  }
868  // TODO: when any automatically-added bitstream filter is generating multiple
869  // output packets for a single input one, we'll need to call this in a loop
870  // and write each output packet.
871  if ((ret = av_bsf_receive_packet(ctx, pkt)) < 0) {
872  if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
873  return 0;
874  av_log(ctx, AV_LOG_ERROR,
875  "Failed to receive packet from filter %s for stream %d\n",
876  ctx->filter->name, pkt->stream_index);
878  return ret;
879  return 0;
880  }
881  }
882  return 1;
883 }
884 
886 {
887  int ret;
888 
889  ret = prepare_input_packet(s, pkt);
890  if (ret < 0)
891  return ret;
892 
893  if (!pkt) {
894  if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
895  ret = s->oformat->write_packet(s, NULL);
896  flush_if_needed(s);
897  if (ret >= 0 && s->pb && s->pb->error < 0)
898  ret = s->pb->error;
899  return ret;
900  }
901  return 1;
902  }
903 
904  ret = do_packet_auto_bsf(s, pkt);
905  if (ret <= 0)
906  return ret;
907 
908 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
909  ret = compute_muxer_pkt_fields(s, s->streams[pkt->stream_index], pkt);
910 
911  if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
912  return ret;
913 #endif
914 
915  ret = write_packet(s, pkt);
916  if (ret >= 0 && s->pb && s->pb->error < 0)
917  ret = s->pb->error;
918 
919  if (ret >= 0)
920  s->streams[pkt->stream_index]->nb_frames++;
921  return ret;
922 }
923 
924 #define CHUNK_START 0x1000
925 
927  int (*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))
928 {
929  int ret;
930  AVPacketList **next_point, *this_pktl;
931  AVStream *st = s->streams[pkt->stream_index];
932  int chunked = s->max_chunk_size || s->max_chunk_duration;
933 
934  this_pktl = av_mallocz(sizeof(AVPacketList));
935  if (!this_pktl)
936  return AVERROR(ENOMEM);
937  if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
939  av_assert0(((AVFrame *)pkt->data)->buf);
940  this_pktl->pkt = *pkt;
941  pkt->buf = NULL;
942  pkt->side_data = NULL;
943  pkt->side_data_elems = 0;
944  } else {
945  if ((ret = av_packet_ref(&this_pktl->pkt, pkt)) < 0) {
946  av_free(this_pktl);
947  return ret;
948  }
949  }
950 
952  next_point = &(st->last_in_packet_buffer->next);
953  } else {
954  next_point = &s->internal->packet_buffer;
955  }
956 
957  if (chunked) {
959  st->interleaver_chunk_size += pkt->size;
962  || (max && st->interleaver_chunk_duration > max)) {
963  st->interleaver_chunk_size = 0;
964  this_pktl->pkt.flags |= CHUNK_START;
965  if (max && st->interleaver_chunk_duration > max) {
966  int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
967  int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
968 
969  st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
970  } else
972  }
973  }
974  if (*next_point) {
975  if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
976  goto next_non_null;
977 
978  if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
979  while ( *next_point
980  && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
981  || !compare(s, &(*next_point)->pkt, pkt)))
982  next_point = &(*next_point)->next;
983  if (*next_point)
984  goto next_non_null;
985  } else {
986  next_point = &(s->internal->packet_buffer_end->next);
987  }
988  }
989  av_assert1(!*next_point);
990 
991  s->internal->packet_buffer_end = this_pktl;
992 next_non_null:
993 
994  this_pktl->next = *next_point;
995 
997  *next_point = this_pktl;
998 
999  av_packet_unref(pkt);
1000 
1001  return 0;
1002 }
1003 
1005  const AVPacket *pkt)
1006 {
1007  AVStream *st = s->streams[pkt->stream_index];
1008  AVStream *st2 = s->streams[next->stream_index];
1009  int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
1010  st->time_base);
1011  if (s->audio_preload) {
1012  int preload = st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
1013  int preload2 = st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
1014  if (preload != preload2) {
1015  int64_t ts, ts2;
1016  preload *= s->audio_preload;
1017  preload2 *= s->audio_preload;
1018  ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - preload;
1019  ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - preload2;
1020  if (ts == ts2) {
1021  ts = ((uint64_t)pkt ->dts*st ->time_base.num*AV_TIME_BASE - (uint64_t)preload *st ->time_base.den)*st2->time_base.den
1022  - ((uint64_t)next->dts*st2->time_base.num*AV_TIME_BASE - (uint64_t)preload2*st2->time_base.den)*st ->time_base.den;
1023  ts2 = 0;
1024  }
1025  comp = (ts2 > ts) - (ts2 < ts);
1026  }
1027  }
1028 
1029  if (comp == 0)
1030  return pkt->stream_index < next->stream_index;
1031  return comp > 0;
1032 }
1033 
1035  AVPacket *pkt, int flush)
1036 {
1037  AVPacketList *pktl;
1038  int stream_count = 0;
1039  int noninterleaved_count = 0;
1040  int i, ret;
1041  int eof = flush;
1042 
1043  if (pkt) {
1044  if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
1045  return ret;
1046  }
1047 
1048  for (i = 0; i < s->nb_streams; i++) {
1049  if (s->streams[i]->last_in_packet_buffer) {
1050  ++stream_count;
1051  } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
1054  ++noninterleaved_count;
1055  }
1056  }
1057 
1058  if (s->internal->nb_interleaved_streams == stream_count)
1059  flush = 1;
1060 
1061  if (s->max_interleave_delta > 0 &&
1062  s->internal->packet_buffer &&
1063  !flush &&
1064  s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
1065  ) {
1066  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1067  int64_t delta_dts = INT64_MIN;
1068  int64_t top_dts = av_rescale_q(top_pkt->dts,
1069  s->streams[top_pkt->stream_index]->time_base,
1070  AV_TIME_BASE_Q);
1071 
1072  for (i = 0; i < s->nb_streams; i++) {
1073  int64_t last_dts;
1074  const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
1075 
1076  if (!last)
1077  continue;
1078 
1079  last_dts = av_rescale_q(last->pkt.dts,
1080  s->streams[i]->time_base,
1081  AV_TIME_BASE_Q);
1082  delta_dts = FFMAX(delta_dts, last_dts - top_dts);
1083  }
1084 
1085  if (delta_dts > s->max_interleave_delta) {
1086  av_log(s, AV_LOG_DEBUG,
1087  "Delay between the first packet and last packet in the "
1088  "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
1089  delta_dts, s->max_interleave_delta);
1090  flush = 1;
1091  }
1092  }
1093 
1094  if (s->internal->packet_buffer &&
1095  eof &&
1096  (s->flags & AVFMT_FLAG_SHORTEST) &&
1098  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1099 
1100  s->internal->shortest_end = av_rescale_q(top_pkt->dts,
1101  s->streams[top_pkt->stream_index]->time_base,
1102  AV_TIME_BASE_Q);
1103  }
1104 
1105  if (s->internal->shortest_end != AV_NOPTS_VALUE) {
1106  while (s->internal->packet_buffer) {
1107  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1108  AVStream *st;
1109  int64_t top_dts = av_rescale_q(top_pkt->dts,
1110  s->streams[top_pkt->stream_index]->time_base,
1111  AV_TIME_BASE_Q);
1112 
1113  if (s->internal->shortest_end + 1 >= top_dts)
1114  break;
1115 
1116  pktl = s->internal->packet_buffer;
1117  st = s->streams[pktl->pkt.stream_index];
1118 
1119  s->internal->packet_buffer = pktl->next;
1120  if (!s->internal->packet_buffer)
1122 
1123  if (st->last_in_packet_buffer == pktl)
1125 
1126  av_packet_unref(&pktl->pkt);
1127  av_freep(&pktl);
1128  flush = 0;
1129  }
1130  }
1131 
1132  if (stream_count && flush) {
1133  AVStream *st;
1134  pktl = s->internal->packet_buffer;
1135  *out = pktl->pkt;
1136  st = s->streams[out->stream_index];
1137 
1138  s->internal->packet_buffer = pktl->next;
1139  if (!s->internal->packet_buffer)
1141 
1142  if (st->last_in_packet_buffer == pktl)
1144  av_freep(&pktl);
1145 
1146  return 1;
1147  } else {
1148  av_init_packet(out);
1149  return 0;
1150  }
1151 }
1152 
1154  AVPacket *pkt, int add_offset)
1155 {
1156  AVPacketList *pktl = s->internal->packet_buffer;
1157  while (pktl) {
1158  if (pktl->pkt.stream_index == stream) {
1159  *pkt = pktl->pkt;
1160  if (add_offset) {
1161  AVStream *st = s->streams[pkt->stream_index];
1162  int64_t offset = st->mux_ts_offset;
1163 
1164  if (s->output_ts_offset)
1166 
1167  if (pkt->dts != AV_NOPTS_VALUE)
1168  pkt->dts += offset;
1169  if (pkt->pts != AV_NOPTS_VALUE)
1170  pkt->pts += offset;
1171  }
1172  return 0;
1173  }
1174  pktl = pktl->next;
1175  }
1176  return AVERROR(ENOENT);
1177 }
1178 
1179 /**
1180  * Interleave an AVPacket correctly so it can be muxed.
1181  * @param out the interleaved packet will be output here
1182  * @param in the input packet
1183  * @param flush 1 if no further packets are available as input and all
1184  * remaining packets should be output
1185  * @return 1 if a packet was output, 0 if no packet could be output,
1186  * < 0 if an error occurred
1187  */
1189 {
1190  if (s->oformat->interleave_packet) {
1191  int ret = s->oformat->interleave_packet(s, out, in, flush);
1192  if (in)
1193  av_packet_unref(in);
1194  return ret;
1195  } else
1196  return ff_interleave_packet_per_dts(s, out, in, flush);
1197 }
1198 
1200 {
1201  int ret, flush = 0;
1202 
1203  ret = prepare_input_packet(s, pkt);
1204  if (ret < 0)
1205  goto fail;
1206 
1207  if (pkt) {
1208  AVStream *st = s->streams[pkt->stream_index];
1209 
1210  ret = do_packet_auto_bsf(s, pkt);
1211  if (ret == 0)
1212  return 0;
1213  else if (ret < 0)
1214  goto fail;
1215 
1216  if (s->debug & FF_FDEBUG_TS)
1217  av_log(s, AV_LOG_DEBUG, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
1218  pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1219 
1220 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
1221  if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1222  goto fail;
1223 #endif
1224 
1225  if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
1226  ret = AVERROR(EINVAL);
1227  goto fail;
1228  }
1229  } else {
1230  av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1231  flush = 1;
1232  }
1233 
1234  for (;; ) {
1235  AVPacket opkt;
1236  int ret = interleave_packet(s, &opkt, pkt, flush);
1237  if (pkt) {
1238  memset(pkt, 0, sizeof(*pkt));
1239  av_init_packet(pkt);
1240  pkt = NULL;
1241  }
1242  if (ret <= 0) //FIXME cleanup needed for ret<0 ?
1243  return ret;
1244 
1245  ret = write_packet(s, &opkt);
1246  if (ret >= 0)
1247  s->streams[opkt.stream_index]->nb_frames++;
1248 
1249  av_packet_unref(&opkt);
1250 
1251  if (ret < 0)
1252  return ret;
1253  if(s->pb && s->pb->error)
1254  return s->pb->error;
1255  }
1256 fail:
1257  av_packet_unref(pkt);
1258  return ret;
1259 }
1260 
1262 {
1263  int ret, i;
1264 
1265  for (;; ) {
1266  AVPacket pkt;
1267  ret = interleave_packet(s, &pkt, NULL, 1);
1268  if (ret < 0)
1269  goto fail;
1270  if (!ret)
1271  break;
1272 
1273  ret = write_packet(s, &pkt);
1274  if (ret >= 0)
1275  s->streams[pkt.stream_index]->nb_frames++;
1276 
1277  av_packet_unref(&pkt);
1278 
1279  if (ret < 0)
1280  goto fail;
1281  if(s->pb && s->pb->error)
1282  goto fail;
1283  }
1284 
1285 fail:
1286  if (s->oformat->write_trailer) {
1287  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1289  if (ret >= 0) {
1290  ret = s->oformat->write_trailer(s);
1291  } else {
1292  s->oformat->write_trailer(s);
1293  }
1294  }
1295 
1296  deinit_muxer(s);
1297 
1298  if (s->pb)
1299  avio_flush(s->pb);
1300  if (ret == 0)
1301  ret = s->pb ? s->pb->error : 0;
1302  for (i = 0; i < s->nb_streams; i++) {
1303  av_freep(&s->streams[i]->priv_data);
1304  av_freep(&s->streams[i]->index_entries);
1305  }
1306  if (s->oformat->priv_class)
1307  av_opt_free(s->priv_data);
1308  av_freep(&s->priv_data);
1309  return ret;
1310 }
1311 
1312 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1313  int64_t *dts, int64_t *wall)
1314 {
1315  if (!s->oformat || !s->oformat->get_output_timestamp)
1316  return AVERROR(ENOSYS);
1317  s->oformat->get_output_timestamp(s, stream, dts, wall);
1318  return 0;
1319 }
1320 
1321 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1323 {
1324  AVPacket local_pkt;
1325  int ret;
1326 
1327  local_pkt = *pkt;
1328  local_pkt.stream_index = dst_stream;
1329 
1330  av_packet_rescale_ts(&local_pkt,
1331  src->streams[pkt->stream_index]->time_base,
1332  dst->streams[dst_stream]->time_base);
1333 
1334  if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1335  else ret = av_write_frame(dst, &local_pkt);
1336  pkt->buf = local_pkt.buf;
1337  pkt->side_data = local_pkt.side_data;
1338  pkt->side_data_elems = local_pkt.side_data_elems;
1339  return ret;
1340 }
1341 
1342 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1343  AVFrame *frame, int interleaved)
1344 {
1345  AVPacket pkt, *pktp;
1346 
1347  av_assert0(s->oformat);
1348  if (!s->oformat->write_uncoded_frame)
1349  return AVERROR(ENOSYS);
1350 
1351  if (!frame) {
1352  pktp = NULL;
1353  } else {
1354  pktp = &pkt;
1355  av_init_packet(&pkt);
1356  pkt.data = (void *)frame;
1358  pkt.pts =
1359  pkt.dts = frame->pts;
1360  pkt.duration = frame->pkt_duration;
1361  pkt.stream_index = stream_index;
1363  }
1364 
1365  return interleaved ? av_interleaved_write_frame(s, pktp) :
1366  av_write_frame(s, pktp);
1367 }
1368 
1369 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1370  AVFrame *frame)
1371 {
1372  return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1373 }
1374 
1376  AVFrame *frame)
1377 {
1378  return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1379 }
1380 
1382 {
1383  av_assert0(s->oformat);
1384  if (!s->oformat->write_uncoded_frame)
1385  return AVERROR(ENOSYS);
1386  return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1388 }
int avformat_alloc_output_context2(AVFormatContext **avctx, ff_const59 AVOutputFormat *oformat, const char *format, const char *filename)
Allocate an AVFormatContext for an output format.
Definition: mux.c:148
#define AV_CODEC_PROP_REORDER
Codec supports frame reordering.
Definition: avcodec.h:773
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:1129
enum AVChromaLocation chroma_location
Definition: avcodec.h:4058
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:863
enum AVFieldOrder field_order
Video only.
Definition: avcodec.h:4049
int audio_preload
Audio preload in microseconds.
Definition: avformat.h:1706
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static int check_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mux.c:771
enum AVCodecID id
Definition: internal.h:43
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2522
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:544
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file ensuring correct interleaving.
Definition: mux.c:1199
int bitstream_checked
Whether or not check_bitstream should still be run on each packet.
Definition: internal.h:165
FFFrac * priv_pts
Definition: internal.h:192
static void flush(AVCodecContext *avctx)
int flush_packets
Flush the I/O context after each packet.
Definition: avformat.h:1773
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:885
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int reorder
Set to 1 if the codec allows reordering, so pts can be different from dts.
Definition: internal.h:152
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4929
int64_t pts_buffer[MAX_REORDER_DELAY+1]
Definition: avformat.h:1108
const char * desc
Definition: nvenc.c:68
int(* init)(struct AVFormatContext *)
Initialize format.
Definition: avformat.h:624
#define AVSTREAM_INIT_IN_INIT_OUTPUT
stream parameters initialized in avformat_init_output
Definition: avformat.h:2529
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:1828
AVRational sample_aspect_ratio
Video only.
Definition: avcodec.h:4044
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1328
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3968
const struct AVBitStreamFilter * filter
The bitstream filter this context is an instance of.
Definition: avcodec.h:5783
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:943
int num
Numerator.
Definition: rational.h:59
The bitstream filter state.
Definition: avcodec.h:5774
int index
stream index in AVFormatContext
Definition: avformat.h:882
int size
Definition: avcodec.h:1481
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:1034
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1110
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1811
static void deinit_muxer(AVFormatContext *s)
Definition: mux.c:488
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
int av_get_output_timestamp(struct AVFormatContext *s, int stream, int64_t *dts, int64_t *wall)
Get timing information for the data currently output.
Definition: mux.c:1312
int64_t offset
Offset to remap timestamps to be non-negative.
Definition: internal.h:106
void * priv_data
Definition: avformat.h:896
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
int avoid_negative_ts_use_pts
Definition: internal.h:119
static AVPacket pkt
int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
Test whether a muxer supports uncoded frame.
Definition: mux.c:1381
#define src
Definition: vp8dsp.c:254
#define AVFMT_ALLOW_FLUSH
Format allows flushing.
Definition: avformat.h:476
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample format(the sample packing is implied by the sample format) and sample rate.The lists are not just lists
static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index, AVFrame *frame, int interleaved)
Definition: mux.c:1342
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1666
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:477
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3960
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:1321
int(* interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush)
Currently only used to set pixel format if not YUV420P.
Definition: avformat.h:570
Trailer data, which doesn&#39;t contain actual content, but only for finalizing the output file...
Definition: avio.h:140
Format I/O context.
Definition: avformat.h:1358
int64_t output_ts_offset
Output timestamp offset, in microseconds.
Definition: avformat.h:1875
int64_t cur_dts
Definition: avformat.h:1084
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:924
Public dictionary API.
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:212
static void flush_if_needed(AVFormatContext *s)
Definition: mux.c:478
int flags
can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS, AVFMT_VARIABLE_FPS, AVFMT_NODIMENSIONS, AVFMT_NOSTREAMS, AVFMT_ALLOW_FLUSH, AVFMT_TS_NONSTRICT, AVFMT_TS_NEGATIVE
Definition: avformat.h:524
Round toward +infinity.
Definition: mathematics.h:83
Opaque data information usually continuous.
Definition: avutil.h:203
int width
Video only.
Definition: avcodec.h:4034
#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:642
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
AVPacket pkt
Definition: avformat.h:2032
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
#define f(width, name)
Definition: cbs_vp9.c:255
int priv_data_size
size of private data so that it can be allocated in the wrapper
Definition: avformat.h:555
The exact value of the fractional number is: &#39;val + num / den&#39;.
Definition: internal.h:59
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1498
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:388
void avio_write_marker(AVIOContext *s, int64_t time, enum AVIODataMarkerType type)
Mark the written bytestream as a specific type.
Definition: aviobuf.c:496
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:144
const char * name
Definition: avcodec.h:5824
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:956
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:1489
uint8_t * data
Definition: avcodec.h:1480
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:1660
uint32_t tag
Definition: movenc.c:1531
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define max(a, b)
Definition: cuda_runtime.h:33
struct AVPacketList * packet_buffer
This buffer is only needed when packets were already buffered but not decoded, for example to get the...
Definition: internal.h:76
#define AVSTREAM_INIT_IN_WRITE_HEADER
stream parameters initialized in avformat_write_header
Definition: avformat.h:2528
static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
Interleave an AVPacket correctly so it can be muxed.
Definition: mux.c:1188
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1506
#define av_log(a,...)
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
Definition: avpacket.c:608
static int interleave_compare_dts(AVFormatContext *s, const AVPacket *next, const AVPacket *pkt)
Definition: mux.c:1004
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
#define ff_const59
The ff_const59 define is not part of the public API and will be removed without further warning...
Definition: avformat.h:549
#define AVFMT_FLAG_FLUSH_PACKETS
Flush the AVIOContext every packet.
Definition: avformat.h:1499
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h: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:1598
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:1533
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
void av_packet_rescale_ts(AVPacket *pkt, AVRational tb_src, AVRational tb_dst)
Convert valid timing fields (timestamps / durations) in a packet from one timebase to another...
Definition: avpacket.c:704
static int validate_codec_tag(AVFormatContext *s, AVStream *st)
Definition: mux.c:209
#define AV_PKT_FLAG_UNCODED_FRAME
Definition: mux.c:551
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
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:639
char * url
input or output URL.
Definition: avformat.h:1454
int video_delay
Video only.
Definition: avcodec.h:4063
#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:3964
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1463
simple assert() macros that are a bit more flexible than ISO C assert().
int side_data_elems
Definition: avcodec.h:1492
#define FFMAX(a, b)
Definition: common.h:94
int64_t val
Definition: internal.h:60
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:122
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1486
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:3277
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:735
static int write_packet(AVFormatContext *s, AVPacket *pkt)
Make timestamps non negative, move side data from payload to internal struct, call muxer...
Definition: mux.c:681
int streams_initialized
Whether or not avformat_init_output fully initialized streams.
Definition: internal.h:134
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1414
AVBSFContext ** bsfcs
bitstream filters to run on stream
Definition: internal.h:159
#define LIBAVFORMAT_IDENT
Definition: version.h:46
int block_align
Audio only.
Definition: avcodec.h:4085
This is any, unlabelled data.
Definition: avio.h:135
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:911
int(* write_header)(struct AVFormatContext *)
Definition: avformat.h:557
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
int64_t shortest_end
Timestamp of the end of the shortest stream.
Definition: internal.h:124
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
int avformat_write_header(AVFormatContext *s, AVDictionary **options)
Allocate the stream private data and write the stream header to an output media file.
Definition: mux.c:516
int(* write_uncoded_frame)(struct AVFormatContext *, int stream_index, AVFrame **frame, unsigned flags)
Write an uncoded AVFrame.
Definition: avformat.h:597
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:557
ITU-R 601, SMPTE 274M 296M S314M(DV 4:1:1), mpeg2 4:2:2.
Definition: pixfmt.h:546
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:186
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
AVFormatContext * ctx
Definition: movenc.c:48
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
#define s(width, name)
Definition: cbs_vp9.c:257
int avoid_negative_ts
Avoid negative timestamps during muxing.
Definition: avformat.h:1689
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:2708
int n
Definition: avisynth_c.h:760
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
static int init_muxer(AVFormatContext *s, AVDictionary **options)
Definition: mux.c:243
Opaque data information usually sparse.
Definition: avutil.h:205
int64_t num
Definition: internal.h:60
const AVClass * priv_class
AVClass for the private context.
Definition: avformat.h:533
int avformat_init_output(AVFormatContext *s, AVDictionary **options)
Allocate the stream private data and initialize the codec, but do not write the header.
Definition: mux.c:496
int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)
Set all the options from a given dictionary on an object.
Definition: opt.c:1601
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:849
ff_const59 struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1377
if(ret)
static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
Definition: eamad.c:83
Stream structure.
Definition: avformat.h:881
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:467
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:1153
#define FF_FDEBUG_TS
Definition: avformat.h:1642
int frame_size
Definition: mxfenc.c:2223
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1238
int64_t pkt_duration
duration of the corresponding packet, expressed in AVStream->time_base units, 0 if unknown...
Definition: frame.h:574
int debug
Flags to enable debugging.
Definition: avformat.h:1641
#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:1626
AVIOContext * pb
I/O context.
Definition: avformat.h:1400
const struct AVCodecTag *const * codec_tag
List of supported codec_id-codec_tag pairs, ordered by "better choice first".
Definition: avformat.h:530
int64_t den
Definition: internal.h:60
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:599
int(* write_trailer)(struct AVFormatContext *)
Definition: avformat.h:566
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31))))#define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac){}void ff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map){AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);return NULL;}return ac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;}int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){int use_generic=1;int len=in->nb_samples;int p;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
#define UNCODED_FRAME_PACKET_SIZE
Definition: mux.c:557
int nb_interleaved_streams
Number of streams relevant for interleaving.
Definition: internal.h:69
Describe the class of an AVClass context structure.
Definition: log.h:67
int initialized
Whether or not avformat_init_output has already been called.
Definition: internal.h:129
#define FF_COMPLIANCE_NORMAL
Definition: avcodec.h:2634
unsigned int avpriv_toupper4(unsigned int x)
Definition: utils.c:1813
ff_const59 AVOutputFormat * av_guess_format(const char *short_name, const char *filename, const char *mime_type)
Return the output format in the list of registered output formats which best matches the provided par...
Definition: format.c:51
int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt, int(*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))
Add packet to AVFormatContext->packet_buffer list, determining its interleaved position using compare...
Definition: mux.c:926
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:854
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:2058
void(* get_output_timestamp)(struct AVFormatContext *s, int stream, int64_t *dts, int64_t *wall)
Definition: avformat.h:581
void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:238
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:842
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:1690
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4433
#define AVFMT_FLAG_AUTO_BSF
Add bitstream filters as requested by the muxer.
Definition: avformat.h:1517
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:1737
misc parsing utilities
This struct describes the properties of a single codec described by an AVCodecID. ...
Definition: avcodec.h:719
unsigned int tag
Definition: internal.h:44
AVRational offset_timebase
Timebase for the timestamp offset.
Definition: internal.h:111
int sample_rate
Audio only.
Definition: avcodec.h:4078
int64_t interleaver_chunk_duration
Definition: avformat.h:1130
#define AVFMT_AVOID_NEG_TS_MAKE_ZERO
Shift timestamps so that they start at 0.
Definition: avformat.h:1692
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:1491
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1581
const OptionDef options[]
Definition: ffmpeg_opt.c:3374
#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:1375
common internal api header.
struct AVPacketList * next
Definition: avformat.h:2033
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:463
#define AVFMT_NOSTREAMS
Format does not require any streams.
Definition: avformat.h:472
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:1722
int error_recognition
Error recognition; higher values will detect more errors but may misdetect some more or less valid pa...
Definition: avformat.h:1625
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:934
static void frac_add(FFFrac *f, int64_t incr)
Fractional addition to f: f = f + (incr / f->den).
Definition: mux.c:82
static int init_pts(AVFormatContext *s)
Definition: mux.c:433
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:932
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:1369
int64_t mux_ts_offset
Timestamp offset added to timestamps before muxing NOT PART OF PUBLIC API.
Definition: avformat.h:1185
#define AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE
Shift timestamps so they are non negative.
Definition: avformat.h:1691
struct AVPacketList * packet_buffer_end
Definition: internal.h:77
#define av_free(p)
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:54
int max_chunk_duration
Max chunk time in microseconds.
Definition: avformat.h:1714
void * priv_data
Format private data.
Definition: avformat.h:1386
void(* deinit)(struct AVFormatContext *)
Deinitialize format.
Definition: avformat.h:633
#define AVFMT_NODIMENSIONS
Format does not need width/height.
Definition: avformat.h:471
int(* write_packet)(struct AVFormatContext *, AVPacket *pkt)
Write a packet.
Definition: avformat.h:565
int channels
Audio only.
Definition: avcodec.h:4074
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:170
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1479
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1261
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:542
unbuffered private I/O API
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:545
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
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:3972
#define FFSWAP(type, a, b)
Definition: common.h:99
int stream_index
Definition: avcodec.h:1482
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:910
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
#define MKTAG(a, b, c, d)
Definition: common.h:366
unsigned int av_codec_get_tag(const struct AVCodecTag *const *tags, enum AVCodecID id)
Get the codec tag for the given codec id id.
#define AVFMT_TS_NEGATIVE
Format allows muxing negative timestamps.
Definition: avformat.h:482
This structure stores compressed data.
Definition: avcodec.h:1457
static int prepare_input_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mux.c:790
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1473
struct AVPacketList * last_in_packet_buffer
last packet in packet_buffer for this stream when muxing.
Definition: avformat.h:1105
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:1516
static uint8_t tmp[11]
Definition: aes_ctr.c:26