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  int ret = 0;
491 
492  if ((ret = init_muxer(s, options)) < 0)
493  return ret;
494 
495  s->internal->initialized = 1;
497 
498  if (s->oformat->init && ret) {
499  if ((ret = init_pts(s)) < 0)
500  return ret;
501 
503  }
504 
506 }
507 
509 {
510  int ret = 0;
511  int already_initialized = s->internal->initialized;
512  int streams_already_initialized = s->internal->streams_initialized;
513 
514  if (!already_initialized)
515  if ((ret = avformat_init_output(s, options)) < 0)
516  return ret;
517 
518  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
520  if (s->oformat->write_header) {
521  ret = s->oformat->write_header(s);
522  if (ret >= 0 && s->pb && s->pb->error < 0)
523  ret = s->pb->error;
524  if (ret < 0)
525  goto fail;
526  flush_if_needed(s);
527  }
528  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
530 
531  if (!s->internal->streams_initialized) {
532  if ((ret = init_pts(s)) < 0)
533  goto fail;
534  }
535 
536  return streams_already_initialized;
537 
538 fail:
539  if (s->oformat->deinit)
540  s->oformat->deinit(s);
541  return ret;
542 }
543 
544 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
545 
546 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
547  it is only being used internally to this file as a consistency check.
548  The value is chosen to be very unlikely to appear on its own and to cause
549  immediate failure if used anywhere as a real size. */
550 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
551 
552 
553 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
555 //FIXME merge with compute_pkt_fields
556 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
557 {
558  int delay = FFMAX(st->codecpar->video_delay, st->internal->avctx->max_b_frames > 0);
559  int num, den, i;
560  int frame_size;
561 
562  if (!s->internal->missing_ts_warning &&
563  !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
565  (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
567  "Timestamps are unset in a packet for stream %d. "
568  "This is deprecated and will stop working in the future. "
569  "Fix your code to set the timestamps properly\n", st->index);
570  s->internal->missing_ts_warning = 1;
571  }
572 
573  if (s->debug & FF_FDEBUG_TS)
574  av_log(s, AV_LOG_DEBUG, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
575  av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
576 
577  if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
578  av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
579  pkt->duration, pkt->stream_index);
580  pkt->duration = 0;
581  }
582 
583  /* duration field */
584  if (pkt->duration == 0) {
585  ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
586  if (den && num) {
587  pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
588  }
589  }
590 
591  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
592  pkt->pts = pkt->dts;
593 
594  //XXX/FIXME this is a temporary hack until all encoders output pts
595  if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
596  static int warned;
597  if (!warned) {
598  av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
599  warned = 1;
600  }
601  pkt->dts =
602 // pkt->pts= st->cur_dts;
603  pkt->pts = st->internal->priv_pts->val;
604  }
605 
606  //calculate dts from pts
607  if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
608  st->pts_buffer[0] = pkt->pts;
609  for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
610  st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
611  for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
612  FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
613 
614  pkt->dts = st->pts_buffer[0];
615  }
616 
617  if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
618  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
621  st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
622  av_log(s, AV_LOG_ERROR,
623  "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
624  st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
625  return AVERROR(EINVAL);
626  }
627  if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
628  av_log(s, AV_LOG_ERROR,
629  "pts (%s) < dts (%s) in stream %d\n",
630  av_ts2str(pkt->pts), av_ts2str(pkt->dts),
631  st->index);
632  return AVERROR(EINVAL);
633  }
634 
635  if (s->debug & FF_FDEBUG_TS)
636  av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%s dts2:%s\n",
637  av_ts2str(pkt->pts), av_ts2str(pkt->dts));
638 
639  st->cur_dts = pkt->dts;
640  st->internal->priv_pts->val = pkt->dts;
641 
642  /* update pts */
643  switch (st->codecpar->codec_type) {
644  case AVMEDIA_TYPE_AUDIO:
645  frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
646  ((AVFrame *)pkt->data)->nb_samples :
647  av_get_audio_frame_duration(st->codec, pkt->size);
648 
649  /* HACK/FIXME, we skip the initial 0 size packets as they are most
650  * likely equal to the encoder delay, but it would be better if we
651  * had the real timestamps from the encoder */
652  if (frame_size >= 0 && (pkt->size || st->internal->priv_pts->num != st->internal->priv_pts->den >> 1 || st->internal->priv_pts->val)) {
653  frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * frame_size);
654  }
655  break;
656  case AVMEDIA_TYPE_VIDEO:
657  frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
658  break;
659  }
660  return 0;
661 }
663 #endif
664 
665 /**
666  * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
667  * sidedata.
668  *
669  * FIXME: this function should NEVER get undefined pts/dts beside when the
670  * AVFMT_NOTIMESTAMPS is set.
671  * Those additional safety checks should be dropped once the correct checks
672  * are set in the callers.
673  */
675 {
676  int ret;
677  int64_t pts_backup, dts_backup;
678 
679  pts_backup = pkt->pts;
680  dts_backup = pkt->dts;
681 
682  // If the timestamp offsetting below is adjusted, adjust
683  // ff_interleaved_peek similarly.
684  if (s->output_ts_offset) {
685  AVStream *st = s->streams[pkt->stream_index];
687 
688  if (pkt->dts != AV_NOPTS_VALUE)
689  pkt->dts += offset;
690  if (pkt->pts != AV_NOPTS_VALUE)
691  pkt->pts += offset;
692  }
693 
694  if (s->avoid_negative_ts > 0) {
695  AVStream *st = s->streams[pkt->stream_index];
696  int64_t offset = st->mux_ts_offset;
697  int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
698 
699  if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
700  (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
701  s->internal->offset = -ts;
703  }
704 
705  if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
706  offset = st->mux_ts_offset =
709  st->time_base,
710  AV_ROUND_UP);
711  }
712 
713  if (pkt->dts != AV_NOPTS_VALUE)
714  pkt->dts += offset;
715  if (pkt->pts != AV_NOPTS_VALUE)
716  pkt->pts += offset;
717 
719  if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
720  av_log(s, AV_LOG_WARNING, "failed to avoid negative "
721  "pts %s in stream %d.\n"
722  "Try -avoid_negative_ts 1 as a possible workaround.\n",
723  av_ts2str(pkt->pts),
724  pkt->stream_index
725  );
726  }
727  } else {
728  av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
729  if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
731  "Packets poorly interleaved, failed to avoid negative "
732  "timestamp %s in stream %d.\n"
733  "Try -max_interleave_delta 0 as a possible workaround.\n",
734  av_ts2str(pkt->dts),
735  pkt->stream_index
736  );
737  }
738  }
739  }
740 
741  if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
742  AVFrame *frame = (AVFrame *)pkt->data;
744  ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
745  av_frame_free(&frame);
746  } else {
747  ret = s->oformat->write_packet(s, pkt);
748  }
749 
750  if (s->pb && ret >= 0) {
751  flush_if_needed(s);
752  if (s->pb->error < 0)
753  ret = s->pb->error;
754  }
755 
756  if (ret < 0) {
757  pkt->pts = pts_backup;
758  pkt->dts = dts_backup;
759  }
760 
761  return ret;
762 }
763 
765 {
766  if (!pkt)
767  return 0;
768 
769  if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
770  av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
771  pkt->stream_index);
772  return AVERROR(EINVAL);
773  }
774 
776  av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
777  return AVERROR(EINVAL);
778  }
779 
780  return 0;
781 }
782 
784 {
785  int ret;
786 
787  ret = check_packet(s, pkt);
788  if (ret < 0)
789  return ret;
790 
791 #if !FF_API_COMPUTE_PKT_FIELDS2 || !FF_API_LAVF_AVCTX
792  /* sanitize the timestamps */
793  if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
794  AVStream *st = s->streams[pkt->stream_index];
795 
796  /* when there is no reordering (so dts is equal to pts), but
797  * only one of them is set, set the other as well */
798  if (!st->internal->reorder) {
799  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
800  pkt->pts = pkt->dts;
801  if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
802  pkt->dts = pkt->pts;
803  }
804 
805  /* check that the timestamps are set */
806  if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
807  av_log(s, AV_LOG_ERROR,
808  "Timestamps are unset in a packet for stream %d\n", st->index);
809  return AVERROR(EINVAL);
810  }
811 
812  /* check that the dts are increasing (or at least non-decreasing,
813  * if the format allows it */
814  if (st->cur_dts != AV_NOPTS_VALUE &&
815  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
816  st->cur_dts > pkt->dts)) {
817  av_log(s, AV_LOG_ERROR,
818  "Application provided invalid, non monotonically increasing "
819  "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
820  st->index, st->cur_dts, pkt->dts);
821  return AVERROR(EINVAL);
822  }
823 
824  if (pkt->pts < pkt->dts) {
825  av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
826  pkt->pts, pkt->dts, st->index);
827  return AVERROR(EINVAL);
828  }
829  }
830 #endif
831 
832  return 0;
833 }
834 
836  AVStream *st = s->streams[pkt->stream_index];
837  int i, ret;
838 
839  if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
840  return 1;
841 
842  if (s->oformat->check_bitstream) {
843  if (!st->internal->bitstream_checked) {
844  if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
845  return ret;
846  else if (ret == 1)
847  st->internal->bitstream_checked = 1;
848  }
849  }
850 
851  for (i = 0; i < st->internal->nb_bsfcs; i++) {
852  AVBSFContext *ctx = st->internal->bsfcs[i];
853  // TODO: when any bitstream filter requires flushing at EOF, we'll need to
854  // flush each stream's BSF chain on write_trailer.
855  if ((ret = av_bsf_send_packet(ctx, pkt)) < 0) {
856  av_log(ctx, AV_LOG_ERROR,
857  "Failed to send packet to filter %s for stream %d\n",
858  ctx->filter->name, pkt->stream_index);
859  return ret;
860  }
861  // TODO: when any automatically-added bitstream filter is generating multiple
862  // output packets for a single input one, we'll need to call this in a loop
863  // and write each output packet.
864  if ((ret = av_bsf_receive_packet(ctx, pkt)) < 0) {
865  if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
866  return 0;
867  av_log(ctx, AV_LOG_ERROR,
868  "Failed to send packet to filter %s for stream %d\n",
869  ctx->filter->name, pkt->stream_index);
871  return ret;
872  return 0;
873  }
874  }
875  return 1;
876 }
877 
879 {
880  int ret;
881 
882  ret = prepare_input_packet(s, pkt);
883  if (ret < 0)
884  return ret;
885 
886  if (!pkt) {
887  if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
888  ret = s->oformat->write_packet(s, NULL);
889  flush_if_needed(s);
890  if (ret >= 0 && s->pb && s->pb->error < 0)
891  ret = s->pb->error;
892  return ret;
893  }
894  return 1;
895  }
896 
897  ret = do_packet_auto_bsf(s, pkt);
898  if (ret <= 0)
899  return ret;
900 
901 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
902  ret = compute_muxer_pkt_fields(s, s->streams[pkt->stream_index], pkt);
903 
904  if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
905  return ret;
906 #endif
907 
908  ret = write_packet(s, pkt);
909  if (ret >= 0 && s->pb && s->pb->error < 0)
910  ret = s->pb->error;
911 
912  if (ret >= 0)
913  s->streams[pkt->stream_index]->nb_frames++;
914  return ret;
915 }
916 
917 #define CHUNK_START 0x1000
918 
920  int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
921 {
922  int ret;
923  AVPacketList **next_point, *this_pktl;
924  AVStream *st = s->streams[pkt->stream_index];
925  int chunked = s->max_chunk_size || s->max_chunk_duration;
926 
927  this_pktl = av_mallocz(sizeof(AVPacketList));
928  if (!this_pktl)
929  return AVERROR(ENOMEM);
930  if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
932  av_assert0(((AVFrame *)pkt->data)->buf);
933  this_pktl->pkt = *pkt;
934  pkt->buf = NULL;
935  pkt->side_data = NULL;
936  pkt->side_data_elems = 0;
937  } else {
938  if ((ret = av_packet_ref(&this_pktl->pkt, pkt)) < 0) {
939  av_free(this_pktl);
940  return ret;
941  }
942  }
943 
945  next_point = &(st->last_in_packet_buffer->next);
946  } else {
947  next_point = &s->internal->packet_buffer;
948  }
949 
950  if (chunked) {
952  st->interleaver_chunk_size += pkt->size;
955  || (max && st->interleaver_chunk_duration > max)) {
956  st->interleaver_chunk_size = 0;
957  this_pktl->pkt.flags |= CHUNK_START;
958  if (max && st->interleaver_chunk_duration > max) {
959  int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
960  int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
961 
962  st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
963  } else
965  }
966  }
967  if (*next_point) {
968  if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
969  goto next_non_null;
970 
971  if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
972  while ( *next_point
973  && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
974  || !compare(s, &(*next_point)->pkt, pkt)))
975  next_point = &(*next_point)->next;
976  if (*next_point)
977  goto next_non_null;
978  } else {
979  next_point = &(s->internal->packet_buffer_end->next);
980  }
981  }
982  av_assert1(!*next_point);
983 
984  s->internal->packet_buffer_end = this_pktl;
985 next_non_null:
986 
987  this_pktl->next = *next_point;
988 
990  *next_point = this_pktl;
991 
992  av_packet_unref(pkt);
993 
994  return 0;
995 }
996 
998  AVPacket *pkt)
999 {
1000  AVStream *st = s->streams[pkt->stream_index];
1001  AVStream *st2 = s->streams[next->stream_index];
1002  int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
1003  st->time_base);
1005  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);
1006  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);
1007  if (ts == ts2) {
1008  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
1009  -( 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;
1010  ts2=0;
1011  }
1012  comp= (ts>ts2) - (ts<ts2);
1013  }
1014 
1015  if (comp == 0)
1016  return pkt->stream_index < next->stream_index;
1017  return comp > 0;
1018 }
1019 
1021  AVPacket *pkt, int flush)
1022 {
1023  AVPacketList *pktl;
1024  int stream_count = 0;
1025  int noninterleaved_count = 0;
1026  int i, ret;
1027  int eof = flush;
1028 
1029  if (pkt) {
1030  if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
1031  return ret;
1032  }
1033 
1034  for (i = 0; i < s->nb_streams; i++) {
1035  if (s->streams[i]->last_in_packet_buffer) {
1036  ++stream_count;
1037  } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
1040  ++noninterleaved_count;
1041  }
1042  }
1043 
1044  if (s->internal->nb_interleaved_streams == stream_count)
1045  flush = 1;
1046 
1047  if (s->max_interleave_delta > 0 &&
1048  s->internal->packet_buffer &&
1049  !flush &&
1050  s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
1051  ) {
1052  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1053  int64_t delta_dts = INT64_MIN;
1054  int64_t top_dts = av_rescale_q(top_pkt->dts,
1055  s->streams[top_pkt->stream_index]->time_base,
1056  AV_TIME_BASE_Q);
1057 
1058  for (i = 0; i < s->nb_streams; i++) {
1059  int64_t last_dts;
1060  const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
1061 
1062  if (!last)
1063  continue;
1064 
1065  last_dts = av_rescale_q(last->pkt.dts,
1066  s->streams[i]->time_base,
1067  AV_TIME_BASE_Q);
1068  delta_dts = FFMAX(delta_dts, last_dts - top_dts);
1069  }
1070 
1071  if (delta_dts > s->max_interleave_delta) {
1072  av_log(s, AV_LOG_DEBUG,
1073  "Delay between the first packet and last packet in the "
1074  "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
1075  delta_dts, s->max_interleave_delta);
1076  flush = 1;
1077  }
1078  }
1079 
1080  if (s->internal->packet_buffer &&
1081  eof &&
1082  (s->flags & AVFMT_FLAG_SHORTEST) &&
1084  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1085 
1086  s->internal->shortest_end = av_rescale_q(top_pkt->dts,
1087  s->streams[top_pkt->stream_index]->time_base,
1088  AV_TIME_BASE_Q);
1089  }
1090 
1091  if (s->internal->shortest_end != AV_NOPTS_VALUE) {
1092  while (s->internal->packet_buffer) {
1093  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1094  AVStream *st;
1095  int64_t top_dts = av_rescale_q(top_pkt->dts,
1096  s->streams[top_pkt->stream_index]->time_base,
1097  AV_TIME_BASE_Q);
1098 
1099  if (s->internal->shortest_end + 1 >= top_dts)
1100  break;
1101 
1102  pktl = s->internal->packet_buffer;
1103  st = s->streams[pktl->pkt.stream_index];
1104 
1105  s->internal->packet_buffer = pktl->next;
1106  if (!s->internal->packet_buffer)
1108 
1109  if (st->last_in_packet_buffer == pktl)
1111 
1112  av_packet_unref(&pktl->pkt);
1113  av_freep(&pktl);
1114  flush = 0;
1115  }
1116  }
1117 
1118  if (stream_count && flush) {
1119  AVStream *st;
1120  pktl = s->internal->packet_buffer;
1121  *out = pktl->pkt;
1122  st = s->streams[out->stream_index];
1123 
1124  s->internal->packet_buffer = pktl->next;
1125  if (!s->internal->packet_buffer)
1127 
1128  if (st->last_in_packet_buffer == pktl)
1130  av_freep(&pktl);
1131 
1132  return 1;
1133  } else {
1134  av_init_packet(out);
1135  return 0;
1136  }
1137 }
1138 
1140  AVPacket *pkt, int add_offset)
1141 {
1142  AVPacketList *pktl = s->internal->packet_buffer;
1143  while (pktl) {
1144  if (pktl->pkt.stream_index == stream) {
1145  *pkt = pktl->pkt;
1146  if (add_offset) {
1147  AVStream *st = s->streams[pkt->stream_index];
1148  int64_t offset = st->mux_ts_offset;
1149 
1150  if (s->output_ts_offset)
1152 
1153  if (pkt->dts != AV_NOPTS_VALUE)
1154  pkt->dts += offset;
1155  if (pkt->pts != AV_NOPTS_VALUE)
1156  pkt->pts += offset;
1157  }
1158  return 0;
1159  }
1160  pktl = pktl->next;
1161  }
1162  return AVERROR(ENOENT);
1163 }
1164 
1165 /**
1166  * Interleave an AVPacket correctly so it can be muxed.
1167  * @param out the interleaved packet will be output here
1168  * @param in the input packet
1169  * @param flush 1 if no further packets are available as input and all
1170  * remaining packets should be output
1171  * @return 1 if a packet was output, 0 if no packet could be output,
1172  * < 0 if an error occurred
1173  */
1175 {
1176  if (s->oformat->interleave_packet) {
1177  int ret = s->oformat->interleave_packet(s, out, in, flush);
1178  if (in)
1179  av_packet_unref(in);
1180  return ret;
1181  } else
1182  return ff_interleave_packet_per_dts(s, out, in, flush);
1183 }
1184 
1186 {
1187  int ret, flush = 0;
1188 
1189  ret = prepare_input_packet(s, pkt);
1190  if (ret < 0)
1191  goto fail;
1192 
1193  if (pkt) {
1194  AVStream *st = s->streams[pkt->stream_index];
1195 
1196  ret = do_packet_auto_bsf(s, pkt);
1197  if (ret == 0)
1198  return 0;
1199  else if (ret < 0)
1200  goto fail;
1201 
1202  if (s->debug & FF_FDEBUG_TS)
1203  av_log(s, AV_LOG_DEBUG, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
1204  pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1205 
1206 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
1207  if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1208  goto fail;
1209 #endif
1210 
1211  if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
1212  ret = AVERROR(EINVAL);
1213  goto fail;
1214  }
1215  } else {
1216  av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1217  flush = 1;
1218  }
1219 
1220  for (;; ) {
1221  AVPacket opkt;
1222  int ret = interleave_packet(s, &opkt, pkt, flush);
1223  if (pkt) {
1224  memset(pkt, 0, sizeof(*pkt));
1225  av_init_packet(pkt);
1226  pkt = NULL;
1227  }
1228  if (ret <= 0) //FIXME cleanup needed for ret<0 ?
1229  return ret;
1230 
1231  ret = write_packet(s, &opkt);
1232  if (ret >= 0)
1233  s->streams[opkt.stream_index]->nb_frames++;
1234 
1235  av_packet_unref(&opkt);
1236 
1237  if (ret < 0)
1238  return ret;
1239  if(s->pb && s->pb->error)
1240  return s->pb->error;
1241  }
1242 fail:
1243  av_packet_unref(pkt);
1244  return ret;
1245 }
1246 
1248 {
1249  int ret, i;
1250 
1251  for (;; ) {
1252  AVPacket pkt;
1253  ret = interleave_packet(s, &pkt, NULL, 1);
1254  if (ret < 0)
1255  goto fail;
1256  if (!ret)
1257  break;
1258 
1259  ret = write_packet(s, &pkt);
1260  if (ret >= 0)
1261  s->streams[pkt.stream_index]->nb_frames++;
1262 
1263  av_packet_unref(&pkt);
1264 
1265  if (ret < 0)
1266  goto fail;
1267  if(s->pb && s->pb->error)
1268  goto fail;
1269  }
1270 
1271 fail:
1272  if (s->oformat->write_trailer) {
1273  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1275  if (ret >= 0) {
1276  ret = s->oformat->write_trailer(s);
1277  } else {
1278  s->oformat->write_trailer(s);
1279  }
1280  }
1281 
1282  if (s->oformat->deinit)
1283  s->oformat->deinit(s);
1284 
1285  s->internal->initialized =
1286  s->internal->streams_initialized = 0;
1287 
1288  if (s->pb)
1289  avio_flush(s->pb);
1290  if (ret == 0)
1291  ret = s->pb ? s->pb->error : 0;
1292  for (i = 0; i < s->nb_streams; i++) {
1293  av_freep(&s->streams[i]->priv_data);
1294  av_freep(&s->streams[i]->index_entries);
1295  }
1296  if (s->oformat->priv_class)
1297  av_opt_free(s->priv_data);
1298  av_freep(&s->priv_data);
1299  return ret;
1300 }
1301 
1302 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1303  int64_t *dts, int64_t *wall)
1304 {
1305  if (!s->oformat || !s->oformat->get_output_timestamp)
1306  return AVERROR(ENOSYS);
1307  s->oformat->get_output_timestamp(s, stream, dts, wall);
1308  return 0;
1309 }
1310 
1311 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1313 {
1314  AVPacket local_pkt;
1315  int ret;
1316 
1317  local_pkt = *pkt;
1318  local_pkt.stream_index = dst_stream;
1319  if (pkt->pts != AV_NOPTS_VALUE)
1320  local_pkt.pts = av_rescale_q(pkt->pts,
1321  src->streams[pkt->stream_index]->time_base,
1322  dst->streams[dst_stream]->time_base);
1323  if (pkt->dts != AV_NOPTS_VALUE)
1324  local_pkt.dts = av_rescale_q(pkt->dts,
1325  src->streams[pkt->stream_index]->time_base,
1326  dst->streams[dst_stream]->time_base);
1327  if (pkt->duration)
1328  local_pkt.duration = av_rescale_q(pkt->duration,
1329  src->streams[pkt->stream_index]->time_base,
1330  dst->streams[dst_stream]->time_base);
1331 
1332  if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1333  else ret = av_write_frame(dst, &local_pkt);
1334  pkt->buf = local_pkt.buf;
1335  pkt->side_data = local_pkt.side_data;
1336  pkt->side_data_elems = local_pkt.side_data_elems;
1337  return ret;
1338 }
1339 
1340 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1341  AVFrame *frame, int interleaved)
1342 {
1343  AVPacket pkt, *pktp;
1344 
1345  av_assert0(s->oformat);
1346  if (!s->oformat->write_uncoded_frame)
1347  return AVERROR(ENOSYS);
1348 
1349  if (!frame) {
1350  pktp = NULL;
1351  } else {
1352  pktp = &pkt;
1353  av_init_packet(&pkt);
1354  pkt.data = (void *)frame;
1356  pkt.pts =
1357  pkt.dts = frame->pts;
1358  pkt.duration = frame->pkt_duration;
1359  pkt.stream_index = stream_index;
1361  }
1362 
1363  return interleaved ? av_interleaved_write_frame(s, pktp) :
1364  av_write_frame(s, pktp);
1365 }
1366 
1367 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1368  AVFrame *frame)
1369 {
1370  return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1371 }
1372 
1374  AVFrame *frame)
1375 {
1376  return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1377 }
1378 
1380 {
1381  av_assert0(s->oformat);
1382  if (!s->oformat->write_uncoded_frame)
1383  return AVERROR(ENOSYS);
1384  return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1386 }
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:770
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:4043
#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:4034
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:764
enum AVCodecID id
Definition: internal.h:45
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:543
This structure describes decoded (raw) audio or video data.
Definition: frame.h:268
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file ensuring correct interleaving.
Definition: mux.c:1185
int bitstream_checked
Whether or not check_bitstream should still be run on each packet.
Definition: internal.h:167
FFFrac * priv_pts
Definition: internal.h:194
static void flush(AVCodecContext *avctx)
int 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:878
#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:154
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4882
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:2522
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:1825
AVRational sample_aspect_ratio
Video only.
Definition: avcodec.h:4029
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1305
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:5768
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:5759
int index
stream index in AVFormatContext
Definition: avformat.h:882
int size
Definition: avcodec.h:1478
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:1020
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
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:1302
int64_t offset
Offset to remap timestamps to be non-negative.
Definition: internal.h:108
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:121
static AVPacket pkt
int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
Test whether a muxer supports uncoded frame.
Definition: mux.c:1379
#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:1340
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: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:1311
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:917
Public dictionary API.
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:211
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:4019
#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:644
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
AVPacket pkt
Definition: avformat.h:2025
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:61
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1495
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:361
void avio_write_marker(AVIOContext *s, int64_t time, enum AVIODataMarkerType type)
Mark the written bytestream as a specific type.
Definition: aviobuf.c:493
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:5809
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:948
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:1477
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:1496
#define AVERROR_EOF
End of file.
Definition: error.h:55
struct AVPacketList * packet_buffer
This buffer is only needed when packets were already buffered but not decoded, for example to get the...
Definition: internal.h:78
#define AVSTREAM_INIT_IN_WRITE_HEADER
stream parameters initialized in avformat_write_header
Definition: avformat.h:2521
static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
Interleave an AVPacket correctly so it can be muxed.
Definition: mux.c:1174
#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
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:260
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:1506
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:209
#define AV_PKT_FLAG_UNCODED_FRAME
Definition: mux.c:544
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: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
#define av_fourcc2str(fourcc)
Definition: avutil.h:348
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:1460
simple assert() macros that are a bit more flexible than ISO C assert().
int side_data_elems
Definition: avcodec.h:1489
#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:120
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1483
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:3257
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:732
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:674
int streams_initialized
Whether or not avformat_init_output fully initialized streams.
Definition: internal.h:136
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1414
AVBSFContext ** bsfcs
bitstream filters to run on stream
Definition: internal.h:161
#define LIBAVFORMAT_IDENT
Definition: version.h:46
int block_align
Audio only.
Definition: avcodec.h:4070
This is any, unlabelled data.
Definition: avio.h:135
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:238
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:908
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:126
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
int avformat_write_header(AVFormatContext *s, AVDictionary **options)
Allocate the stream private data and write the stream header to an output media file.
Definition: mux.c:508
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:556
ITU-R 601, SMPTE 274M 296M S314M(DV 4:1:1), mpeg2 4:2:2.
Definition: pixfmt.h:545
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:185
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:2701
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:62
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:488
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:1578
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:1139
#define FF_FDEBUG_TS
Definition: avformat.h:1642
int frame_size
Definition: mxfenc.c:2216
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:547
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:1603
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: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: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:550
int nb_interleaved_streams
Number of streams relevant for interleaving.
Definition: internal.h:71
Describe the class of an AVClass context structure.
Definition: log.h:67
int initialized
Whether or not avformat_init_output has already been called.
Definition: internal.h:131
#define FF_COMPLIANCE_NORMAL
Definition: avcodec.h:2627
unsigned int avpriv_toupper4(unsigned int x)
Definition: utils.c:1786
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
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:2031
void(* get_output_timestamp)(struct AVFormatContext *s, int stream, int64_t *dts, int64_t *wall)
Definition: avformat.h:581
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:835
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:4389
#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:1710
misc parsing utilities
This struct describes the properties of a single codec described by an AVCodecID. ...
Definition: avcodec.h:716
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: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:1488
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:919
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1558
const OptionDef options[]
Definition: ffmpeg_opt.c:3362
#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:1373
common internal api header.
struct AVPacketList * next
Definition: avformat.h:2026
#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:1367
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:79
#define av_free(p)
static int interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
Definition: mux.c:997
#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:4059
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:172
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1476
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1247
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:541
unbuffered private I/O API
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:544
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:3957
#define FFSWAP(type, a, b)
Definition: common.h:99
int stream_index
Definition: avcodec.h:1479
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:1454
static int prepare_input_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mux.c:783
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1470
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