FFmpeg  4.0
movenc.c
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1 /*
2  * Copyright (c) 2015 Martin Storsjo
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "config.h"
22 
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/mathematics.h"
25 #include "libavutil/md5.h"
26 
27 #include "libavformat/avformat.h"
28 
29 #if HAVE_UNISTD_H
30 #include <unistd.h>
31 #endif
32 
33 #if !HAVE_GETOPT
34 #include "compat/getopt.c"
35 #endif
36 
37 #define HASH_SIZE 16
38 
39 static const uint8_t h264_extradata[] = {
40  0x01, 0x4d, 0x40, 0x1e, 0xff, 0xe1, 0x00, 0x02, 0x67, 0x4d, 0x01, 0x00, 0x02, 0x68, 0xef
41 };
42 static const uint8_t aac_extradata[] = {
43  0x12, 0x10
44 };
45 
46 
47 static const char *format = "mp4";
49 uint8_t iobuf[32768];
51 
53 const char *cur_name;
54 FILE* out;
56 struct AVMD5* md5;
58 
61 
62 int bframes;
63 int64_t duration;
65 int frames;
67 int64_t next_p_pts;
75 
77 
79 
80 
81 static void count_warnings(void *avcl, int level, const char *fmt, va_list vl)
82 {
83  if (level == AV_LOG_WARNING)
84  num_warnings++;
85 }
86 
87 static void init_count_warnings(void)
88 {
90  num_warnings = 0;
91 }
92 
93 static void reset_count_warnings(void)
94 {
96 }
97 
98 static int io_write(void *opaque, uint8_t *buf, int size)
99 {
100  out_size += size;
101  av_md5_update(md5, buf, size);
102  if (out)
103  fwrite(buf, 1, size, out);
104  return size;
105 }
106 
107 static int io_write_data_type(void *opaque, uint8_t *buf, int size,
108  enum AVIODataMarkerType type, int64_t time)
109 {
110  char timebuf[30], content[5] = { 0 };
111  const char *str;
112  switch (type) {
113  case AVIO_DATA_MARKER_HEADER: str = "header"; break;
114  case AVIO_DATA_MARKER_SYNC_POINT: str = "sync"; break;
115  case AVIO_DATA_MARKER_BOUNDARY_POINT: str = "boundary"; break;
116  case AVIO_DATA_MARKER_UNKNOWN: str = "unknown"; break;
117  case AVIO_DATA_MARKER_TRAILER: str = "trailer"; break;
118  default: str = "unknown"; break;
119  }
120  if (time == AV_NOPTS_VALUE)
121  snprintf(timebuf, sizeof(timebuf), "nopts");
122  else
123  snprintf(timebuf, sizeof(timebuf), "%"PRId64, time);
124  // There can be multiple header/trailer callbacks, only log the box type
125  // for header at out_size == 0
126  if (type != AVIO_DATA_MARKER_UNKNOWN &&
127  type != AVIO_DATA_MARKER_TRAILER &&
128  (type != AVIO_DATA_MARKER_HEADER || out_size == 0) &&
129  size >= 8)
130  memcpy(content, &buf[4], 4);
131  else
132  snprintf(content, sizeof(content), "-");
133  printf("write_data len %d, time %s, type %s atom %s\n", size, timebuf, str, content);
134  return io_write(opaque, buf, size);
135 }
136 
137 static void init_out(const char *name)
138 {
139  char buf[100];
140  cur_name = name;
141  snprintf(buf, sizeof(buf), "%s.%s", cur_name, format);
142 
143  av_md5_init(md5);
144  if (write_file) {
145  out = fopen(buf, "wb");
146  if (!out)
147  perror(buf);
148  }
149  out_size = 0;
150 }
151 
152 static void close_out(void)
153 {
154  int i;
155  av_md5_final(md5, hash);
156  for (i = 0; i < HASH_SIZE; i++)
157  printf("%02x", hash[i]);
158  printf(" %d %s\n", out_size, cur_name);
159  if (out)
160  fclose(out);
161  out = NULL;
162 }
163 
164 static void check_func(int value, int line, const char *msg, ...)
165 {
166  if (!value) {
167  va_list ap;
168  va_start(ap, msg);
169  printf("%d: ", line);
170  vprintf(msg, ap);
171  printf("\n");
172  check_faults++;
173  va_end(ap);
174  }
175 }
176 #define check(value, ...) check_func(value, __LINE__, __VA_ARGS__)
177 
178 static void init_fps(int bf, int audio_preroll, int fps)
179 {
180  AVStream *st;
181  int iobuf_size = force_iobuf_size ? force_iobuf_size : sizeof(iobuf);
182  ctx = avformat_alloc_context();
183  if (!ctx)
184  exit(1);
186  if (!ctx->oformat)
187  exit(1);
188  ctx->pb = avio_alloc_context(iobuf, iobuf_size, AVIO_FLAG_WRITE, NULL, NULL, io_write, NULL);
189  if (!ctx->pb)
190  exit(1);
192  ctx->flags |= AVFMT_FLAG_BITEXACT;
193 
194  st = avformat_new_stream(ctx, NULL);
195  if (!st)
196  exit(1);
199  st->codecpar->width = 640;
200  st->codecpar->height = 480;
201  st->time_base.num = 1;
202  st->time_base.den = 30;
203  st->codecpar->extradata_size = sizeof(h264_extradata);
205  if (!st->codecpar->extradata)
206  exit(1);
207  memcpy(st->codecpar->extradata, h264_extradata, sizeof(h264_extradata));
208  video_st = st;
209 
210  st = avformat_new_stream(ctx, NULL);
211  if (!st)
212  exit(1);
215  st->codecpar->sample_rate = 44100;
216  st->codecpar->channels = 2;
217  st->time_base.num = 1;
218  st->time_base.den = 44100;
219  st->codecpar->extradata_size = sizeof(aac_extradata);
221  if (!st->codecpar->extradata)
222  exit(1);
223  memcpy(st->codecpar->extradata, aac_extradata, sizeof(aac_extradata));
224  audio_st = st;
225 
226  if (avformat_write_header(ctx, &opts) < 0)
227  exit(1);
228  av_dict_free(&opts);
229 
230  frames = 0;
231  gop_size = 30;
232  duration = video_st->time_base.den / fps;
233  audio_duration = 1024LL * audio_st->time_base.den / audio_st->codecpar->sample_rate;
234  if (audio_preroll)
235  audio_preroll = 2048LL * audio_st->time_base.den / audio_st->codecpar->sample_rate;
236 
237  bframes = bf;
238  video_dts = bframes ? -duration : 0;
239  audio_dts = -audio_preroll;
240 }
241 
242 static void init(int bf, int audio_preroll)
243 {
244  init_fps(bf, audio_preroll, 30);
245 }
246 
247 static void mux_frames(int n, int c)
248 {
249  int end_frames = frames + n;
250  while (1) {
251  AVPacket pkt;
252  uint8_t pktdata[8] = { 0 };
253  av_init_packet(&pkt);
254 
255  if (av_compare_ts(audio_dts, audio_st->time_base, video_dts, video_st->time_base) < 0) {
256  pkt.dts = pkt.pts = audio_dts;
257  pkt.stream_index = 1;
258  pkt.duration = audio_duration;
260  } else {
261  if (frames == end_frames)
262  break;
263  pkt.dts = video_dts;
264  pkt.stream_index = 0;
265  pkt.duration = duration;
266  if ((frames % gop_size) == 0) {
267  pkt.flags |= AV_PKT_FLAG_KEY;
269  pkt.pts = pkt.dts + duration;
270  video_dts = pkt.pts;
271  } else {
274  pkt.pts = pkt.dts;
276  } else {
278  if (((frames + 1) % gop_size) == 0) {
279  pkt.pts = pkt.dts + duration;
280  video_dts = pkt.pts;
281  } else {
282  next_p_pts = pkt.pts = pkt.dts + 2 * duration;
283  video_dts += duration;
284  }
285  }
286  }
287  if (!bframes)
288  pkt.pts = pkt.dts;
289  if (fake_pkt_duration)
291  frames++;
292  }
293 
294  if (clear_duration)
295  pkt.duration = 0;
296  AV_WB32(pktdata + 4, pkt.pts);
297  pkt.data = pktdata;
298  pkt.size = 8;
299  if (skip_write)
300  continue;
301  if (skip_write_audio && pkt.stream_index == 1)
302  continue;
303 
304  if (c) {
305  pkt.pts += (1LL<<32);
306  pkt.dts += (1LL<<32);
307  }
308 
309  if (do_interleave)
310  av_interleaved_write_frame(ctx, &pkt);
311  else
312  av_write_frame(ctx, &pkt);
313  }
314 }
315 
316 static void mux_gops(int n)
317 {
318  mux_frames(gop_size * n, 0);
319 }
320 
321 static void skip_gops(int n)
322 {
323  skip_write = 1;
324  mux_gops(n);
325  skip_write = 0;
326 }
327 
328 static void signal_init_ts(void)
329 {
330  AVPacket pkt;
331  av_init_packet(&pkt);
332  pkt.size = 0;
333  pkt.data = NULL;
334 
335  pkt.stream_index = 0;
336  pkt.dts = video_dts;
337  pkt.pts = 0;
338  av_write_frame(ctx, &pkt);
339 
340  pkt.stream_index = 1;
341  pkt.dts = pkt.pts = audio_dts;
342  av_write_frame(ctx, &pkt);
343 }
344 
345 static void finish(void)
346 {
347  av_write_trailer(ctx);
348  avio_context_free(&ctx->pb);
350  ctx = NULL;
351 }
352 
353 static void help(void)
354 {
355  printf("movenc-test [-w]\n"
356  "-w write output into files\n");
357 }
358 
359 int main(int argc, char **argv)
360 {
361  int c;
363  uint8_t content[HASH_SIZE];
364  int empty_moov_pos;
365  int prev_pos;
366 
367  for (;;) {
368  c = getopt(argc, argv, "wh");
369  if (c == -1)
370  break;
371  switch (c) {
372  case 'w':
373  write_file = 1;
374  break;
375  default:
376  case 'h':
377  help();
378  return 0;
379  }
380  }
381 
382  md5 = av_md5_alloc();
383  if (!md5)
384  return 1;
385 
386  // Write a fragmented file with an initial moov that actually contains some
387  // samples. One moov+mdat with 1 second of data and one moof+mdat with 1
388  // second of data.
389  init_out("non-empty-moov");
390  av_dict_set(&opts, "movflags", "frag_keyframe", 0);
391  init(0, 0);
392  mux_gops(2);
393  finish();
394  close_out();
395 
396  // Write a similar file, but with B-frames and audio preroll, handled
397  // via an edit list.
398  init_out("non-empty-moov-elst");
399  av_dict_set(&opts, "movflags", "frag_keyframe", 0);
400  av_dict_set(&opts, "use_editlist", "1", 0);
401  init(1, 1);
402  mux_gops(2);
403  finish();
404  close_out();
405 
406  // Use B-frames but no audio-preroll, but without an edit list.
407  // Due to avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO, the dts
408  // of the first audio packet is > 0, but it is set to zero since edit
409  // lists aren't used, increasing the duration of the first packet instead.
410  init_out("non-empty-moov-no-elst");
411  av_dict_set(&opts, "movflags", "frag_keyframe", 0);
412  av_dict_set(&opts, "use_editlist", "0", 0);
413  init(1, 0);
414  mux_gops(2);
415  finish();
416  close_out();
417 
418  format = "ismv";
419  // Write an ISMV, with B-frames and audio preroll.
420  init_out("ismv");
421  av_dict_set(&opts, "movflags", "frag_keyframe", 0);
422  init(1, 1);
423  mux_gops(2);
424  finish();
425  close_out();
426  format = "mp4";
427 
428  // An initial moov that doesn't contain any samples, followed by two
429  // moof+mdat pairs.
430  init_out("empty-moov");
431  av_dict_set(&opts, "movflags", "frag_keyframe+empty_moov", 0);
432  av_dict_set(&opts, "use_editlist", "0", 0);
433  init(0, 0);
434  mux_gops(2);
435  finish();
436  close_out();
437  memcpy(content, hash, HASH_SIZE);
438 
439  // Similar to the previous one, but with input that doesn't start at
440  // pts/dts 0. avoid_negative_ts behaves in the same way as
441  // in non-empty-moov-no-elst above.
442  init_out("empty-moov-no-elst");
443  av_dict_set(&opts, "movflags", "frag_keyframe+empty_moov", 0);
444  init(1, 0);
445  mux_gops(2);
446  finish();
447  close_out();
448 
449  // Same as the previous one, but disable avoid_negative_ts (which
450  // would require using an edit list, but with empty_moov, one can't
451  // write a sensible edit list, when the start timestamps aren't known).
452  // This should trigger a warning - we check that the warning is produced.
454  init_out("empty-moov-no-elst-no-adjust");
455  av_dict_set(&opts, "movflags", "frag_keyframe+empty_moov", 0);
456  av_dict_set(&opts, "avoid_negative_ts", "0", 0);
457  init(1, 0);
458  mux_gops(2);
459  finish();
460  close_out();
461 
463  check(num_warnings > 0, "No warnings printed for unhandled start offset");
464 
465  // Verify that delay_moov produces the same as empty_moov for
466  // simple input
467  init_out("delay-moov");
468  av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov", 0);
469  av_dict_set(&opts, "use_editlist", "0", 0);
470  init(0, 0);
471  mux_gops(2);
472  finish();
473  close_out();
474  check(!memcmp(hash, content, HASH_SIZE), "delay_moov differs from empty_moov");
475 
476  // Test writing content that requires an edit list using delay_moov
477  init_out("delay-moov-elst");
478  av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov", 0);
479  init(1, 1);
480  mux_gops(2);
481  finish();
482  close_out();
483 
484  // Test writing a file with one track lacking packets, with delay_moov.
485  skip_write_audio = 1;
486  init_out("delay-moov-empty-track");
487  av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov", 0);
488  init(0, 0);
489  mux_gops(2);
490  // The automatic flushing shouldn't output anything, since we're still
491  // waiting for data for some tracks
492  check(out_size == 0, "delay_moov flushed prematurely");
493  // When closed (or manually flushed), all the written data should still
494  // be output.
495  finish();
496  close_out();
497  check(out_size > 0, "delay_moov didn't output anything");
498 
499  // Check that manually flushing still outputs things as expected. This
500  // produces two fragments, while the one above produces only one.
501  init_out("delay-moov-empty-track-flush");
502  av_dict_set(&opts, "movflags", "frag_custom+delay_moov", 0);
503  init(0, 0);
504  mux_gops(1);
505  av_write_frame(ctx, NULL); // Force writing the moov
506  check(out_size > 0, "No moov written");
507  av_write_frame(ctx, NULL);
508  mux_gops(1);
509  av_write_frame(ctx, NULL);
510  finish();
511  close_out();
512 
513  skip_write_audio = 0;
514 
515 
516 
517  // Verify that the header written by delay_moov when manually flushed
518  // is identical to the one by empty_moov.
519  init_out("empty-moov-header");
520  av_dict_set(&opts, "movflags", "frag_keyframe+empty_moov", 0);
521  av_dict_set(&opts, "use_editlist", "0", 0);
522  init(0, 0);
523  close_out();
524  memcpy(header, hash, HASH_SIZE);
525  init_out("empty-moov-content");
526  mux_gops(2);
527  // Written 2 seconds of content, with an automatic flush after 1 second.
528  check(out_size > 0, "No automatic flush?");
529  empty_moov_pos = prev_pos = out_size;
530  // Manually flush the second fragment
531  av_write_frame(ctx, NULL);
532  check(out_size > prev_pos, "No second fragment flushed?");
533  prev_pos = out_size;
534  // Check that an extra flush doesn't output any more data
535  av_write_frame(ctx, NULL);
536  check(out_size == prev_pos, "More data written?");
537  close_out();
538  memcpy(content, hash, HASH_SIZE);
539  // Ignore the trailer written here
540  finish();
541 
542  init_out("delay-moov-header");
543  av_dict_set(&opts, "movflags", "frag_custom+delay_moov", 0);
544  av_dict_set(&opts, "use_editlist", "0", 0);
545  init(0, 0);
546  check(out_size == 0, "Output written during init with delay_moov");
547  mux_gops(1); // Write 1 second of content
548  av_write_frame(ctx, NULL); // Force writing the moov
549  close_out();
550  check(!memcmp(hash, header, HASH_SIZE), "delay_moov header differs from empty_moov");
551  init_out("delay-moov-content");
552  av_write_frame(ctx, NULL); // Flush the first fragment
553  check(out_size == empty_moov_pos, "Manually flushed content differs from automatically flushed, %d vs %d", out_size, empty_moov_pos);
554  mux_gops(1); // Write the rest of the content
555  av_write_frame(ctx, NULL); // Flush the second fragment
556  close_out();
557  check(!memcmp(hash, content, HASH_SIZE), "delay_moov content differs from empty_moov");
558  finish();
559 
560 
561  // Verify that we can produce an identical second fragment without
562  // writing the first one. First write the reference fragments that
563  // we want to reproduce.
564  av_dict_set(&opts, "movflags", "frag_custom+empty_moov+dash", 0);
565  init(0, 0);
566  mux_gops(1);
567  av_write_frame(ctx, NULL); // Output the first fragment
568  init_out("empty-moov-second-frag");
569  mux_gops(1);
570  av_write_frame(ctx, NULL); // Output the second fragment
571  close_out();
572  memcpy(content, hash, HASH_SIZE);
573  finish();
574 
575  // Produce the same second fragment without actually writing the first
576  // one before.
577  av_dict_set(&opts, "movflags", "frag_custom+empty_moov+dash+frag_discont", 0);
578  av_dict_set(&opts, "fragment_index", "2", 0);
579  av_dict_set(&opts, "avoid_negative_ts", "0", 0);
580  av_dict_set(&opts, "use_editlist", "0", 0);
581  init(0, 0);
582  skip_gops(1);
583  init_out("empty-moov-second-frag-discont");
584  mux_gops(1);
585  av_write_frame(ctx, NULL); // Output the second fragment
586  close_out();
587  check(!memcmp(hash, content, HASH_SIZE), "discontinuously written fragment differs");
588  finish();
589 
590  // Produce the same thing by using delay_moov, which requires a slightly
591  // different call sequence.
592  av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash+frag_discont", 0);
593  av_dict_set(&opts, "fragment_index", "2", 0);
594  init(0, 0);
595  skip_gops(1);
596  mux_gops(1);
597  av_write_frame(ctx, NULL); // Output the moov
598  init_out("delay-moov-second-frag-discont");
599  av_write_frame(ctx, NULL); // Output the second fragment
600  close_out();
601  check(!memcmp(hash, content, HASH_SIZE), "discontinuously written fragment differs");
602  finish();
603 
604 
605  // Test discontinuously written fragments with B-frames (where the
606  // assumption of starting at pts=0 works) but not with audio preroll
607  // (which can't be guessed).
608  av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash", 0);
609  init(1, 0);
610  mux_gops(1);
611  init_out("delay-moov-elst-init");
612  av_write_frame(ctx, NULL); // Output the moov
613  close_out();
614  memcpy(header, hash, HASH_SIZE);
615  av_write_frame(ctx, NULL); // Output the first fragment
616  init_out("delay-moov-elst-second-frag");
617  mux_gops(1);
618  av_write_frame(ctx, NULL); // Output the second fragment
619  close_out();
620  memcpy(content, hash, HASH_SIZE);
621  finish();
622 
623  av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash+frag_discont", 0);
624  av_dict_set(&opts, "fragment_index", "2", 0);
625  init(1, 0);
626  skip_gops(1);
627  mux_gops(1); // Write the second fragment
628  init_out("delay-moov-elst-init-discont");
629  av_write_frame(ctx, NULL); // Output the moov
630  close_out();
631  check(!memcmp(hash, header, HASH_SIZE), "discontinuously written header differs");
632  init_out("delay-moov-elst-second-frag-discont");
633  av_write_frame(ctx, NULL); // Output the second fragment
634  close_out();
635  check(!memcmp(hash, content, HASH_SIZE), "discontinuously written fragment differs");
636  finish();
637 
638 
639  // Test discontinuously written fragments with B-frames and audio preroll,
640  // properly signaled.
641  av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash", 0);
642  init(1, 1);
643  mux_gops(1);
644  init_out("delay-moov-elst-signal-init");
645  av_write_frame(ctx, NULL); // Output the moov
646  close_out();
647  memcpy(header, hash, HASH_SIZE);
648  av_write_frame(ctx, NULL); // Output the first fragment
649  init_out("delay-moov-elst-signal-second-frag");
650  mux_gops(1);
651  av_write_frame(ctx, NULL); // Output the second fragment
652  close_out();
653  memcpy(content, hash, HASH_SIZE);
654  finish();
655 
656  av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash+frag_discont", 0);
657  av_dict_set(&opts, "fragment_index", "2", 0);
658  init(1, 1);
659  signal_init_ts();
660  skip_gops(1);
661  mux_gops(1); // Write the second fragment
662  init_out("delay-moov-elst-signal-init-discont");
663  av_write_frame(ctx, NULL); // Output the moov
664  close_out();
665  check(!memcmp(hash, header, HASH_SIZE), "discontinuously written header differs");
666  init_out("delay-moov-elst-signal-second-frag-discont");
667  av_write_frame(ctx, NULL); // Output the second fragment
668  close_out();
669  check(!memcmp(hash, content, HASH_SIZE), "discontinuously written fragment differs");
670  finish();
671 
672 
673  // Test muxing discontinuous fragments with very large (> (1<<31)) timestamps.
674  av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash+frag_discont", 0);
675  av_dict_set(&opts, "fragment_index", "2", 0);
676  init(1, 1);
677  signal_init_ts();
678  skip_gops(1);
679  mux_frames(gop_size, 1); // Write the second fragment
680  init_out("delay-moov-elst-signal-init-discont-largets");
681  av_write_frame(ctx, NULL); // Output the moov
682  close_out();
683  init_out("delay-moov-elst-signal-second-frag-discont-largets");
684  av_write_frame(ctx, NULL); // Output the second fragment
685  close_out();
686  finish();
687 
688  // Test VFR content, with sidx atoms (which declare the pts duration
689  // of a fragment, forcing overriding the start pts of the next one).
690  // Here, the fragment duration in pts is significantly different from
691  // the duration in dts. The video stream starts at dts=-10,pts=0, and
692  // the second fragment starts at dts=155,pts=156. The trun duration sum
693  // of the first fragment is 165, which also is written as
694  // baseMediaDecodeTime in the tfdt in the second fragment. The sidx for
695  // the first fragment says earliest_presentation_time = 0 and
696  // subsegment_duration = 156, which also matches the sidx in the second
697  // fragment. For the audio stream, the pts and dts durations also don't
698  // match - the input stream starts at pts=-2048, but that part is excluded
699  // by the edit list.
700  init_out("vfr");
701  av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov+dash", 0);
702  init_fps(1, 1, 3);
703  mux_frames(gop_size/2, 0);
704  duration /= 10;
705  mux_frames(gop_size/2, 0);
706  mux_gops(1);
707  finish();
708  close_out();
709 
710  // Test VFR content, with cleared duration fields. In these cases,
711  // the muxer must guess the duration of the last packet of each
712  // fragment. As long as the framerate doesn't vary (too much) at the
713  // fragment edge, it works just fine. Additionally, when automatically
714  // cutting fragments, the muxer already know the timestamps of the next
715  // packet for one stream (in most cases the video stream), avoiding
716  // having to use guesses for that one.
718  clear_duration = 1;
719  init_out("vfr-noduration");
720  av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov+dash", 0);
721  init_fps(1, 1, 3);
722  mux_frames(gop_size/2, 0);
723  duration /= 10;
724  mux_frames(gop_size/2, 0);
725  mux_gops(1);
726  finish();
727  close_out();
728  clear_duration = 0;
730  check(num_warnings > 0, "No warnings printed for filled in durations");
731 
732  // Test with an IO buffer size that is too small to hold a full fragment;
733  // this will cause write_data_type to be called with the type unknown.
734  force_iobuf_size = 1500;
735  init_out("large_frag");
736  av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov", 0);
737  init_fps(1, 1, 3);
738  mux_gops(2);
739  finish();
740  close_out();
741  force_iobuf_size = 0;
742 
743  // Test VFR content with bframes with interleaving.
744  // Here, using av_interleaved_write_frame allows the muxer to get the
745  // fragment end durations right. We always set the packet duration to
746  // the expected, but we simulate dropped frames at one point.
747  do_interleave = 1;
748  init_out("vfr-noduration-interleave");
749  av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov", 0);
750  av_dict_set(&opts, "frag_duration", "650000", 0);
751  init_fps(1, 1, 30);
752  mux_frames(gop_size/2, 0);
753  // Pretend that the packet duration is the normal, even if
754  // we actually skip a bunch of frames. (I.e., simulate that
755  // we don't know of the framedrop in advance.)
757  duration *= 10;
758  mux_frames(1, 0);
759  fake_pkt_duration = 0;
760  duration /= 10;
761  mux_frames(gop_size/2 - 1, 0);
762  mux_gops(1);
763  finish();
764  close_out();
765  clear_duration = 0;
766  do_interleave = 0;
767 
768  // Write a fragmented file with b-frames and audio preroll,
769  // with negative cts values, removing the edit list for the
770  // video track.
771  init_out("delay-moov-elst-neg-cts");
772  av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov+negative_cts_offsets", 0);
773  init(1, 1);
774  mux_gops(2);
775  finish();
776  close_out();
777 
778  // Write a fragmented file with b-frames without audio preroll,
779  // with negative cts values, avoiding any edit lists, allowing
780  // to use empty_moov instead of delay_moov.
781  init_out("empty-moov-neg-cts");
782  av_dict_set(&opts, "movflags", "frag_keyframe+empty_moov+negative_cts_offsets", 0);
783  init(1, 0);
784  mux_gops(2);
785  finish();
786  close_out();
787 
788  av_free(md5);
789 
790  return check_faults > 0 ? 1 : 0;
791 }
const char * name
Definition: avisynth_c.h:775
#define NULL
Definition: coverity.c:32
int64_t video_dts
Definition: movenc.c:60
int size
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 skip_write
Definition: movenc.c:69
static const uint8_t h264_extradata[]
Definition: movenc.c:39
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:878
const char * fmt
Definition: avisynth_c.h:769
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int bframes
Definition: movenc.c:62
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3884
int num
Numerator.
Definition: rational.h:59
static void count_warnings(void *avcl, int level, const char *fmt, va_list vl)
Definition: movenc.c:81
int size
Definition: avcodec.h:1431
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:655
int out_size
Definition: movenc.c:55
static AVPacket pkt
int num_warnings
Definition: movenc.c:76
static void mux_frames(int n, int c)
Definition: movenc.c:247
int fake_pkt_duration
Definition: movenc.c:74
enum AVPictureType last_picture
Definition: movenc.c:68
static int io_write_data_type(void *opaque, uint8_t *buf, int size, enum AVIODataMarkerType type, int64_t time)
Definition: movenc.c:107
void av_md5_update(AVMD5 *ctx, const uint8_t *src, int len)
Update hash value.
Definition: md5.c:154
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:1342
const char * cur_name
Definition: movenc.c:53
int64_t audio_dts
Definition: movenc.c:60
struct AVMD5 * av_md5_alloc(void)
Allocate an AVMD5 context.
Definition: md5.c:48
uint8_t
int width
Video only.
Definition: avcodec.h:3950
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1448
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4441
int64_t duration
Definition: movenc.c:63
A point in the output bytestream where a demuxer can start parsing (for non self synchronizing bytest...
Definition: avio.h:128
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:144
struct AVMD5 * md5
Definition: movenc.c:56
static void finish(void)
Definition: movenc.c:345
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1473
uint8_t * data
Definition: avcodec.h:1430
static void reset_count_warnings(void)
Definition: movenc.c:93
static const uint8_t header[24]
Definition: sdr2.c:67
Definition: md5.c:40
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1490
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1361
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1462
uint8_t hash[HASH_SIZE]
Definition: movenc.c:57
uint8_t iobuf[32768]
Definition: movenc.c:49
AVIOContext * avio_alloc_context(unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Allocate and initialize an AVIOContext for buffered I/O.
Definition: aviobuf.c:131
AVStream * video_st
Definition: movenc.c:59
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3880
Definition: graph2dot.c:48
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
void av_log_default_callback(void *ptr, int level, const char *fmt, va_list vl)
Default logging callback.
Definition: log.c:300
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1436
int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b)
Compare two timestamps each in its own time base.
Definition: mathematics.c:147
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3902
int gop_size
Definition: movenc.c:66
static void init_fps(int bf, int audio_preroll, int fps)
Definition: movenc.c:178
AVDictionary * opts
Definition: movenc.c:50
#define HASH_SIZE
Definition: movenc.c:37
This is any, unlabelled data.
Definition: avio.h:135
av_warn_unused_result 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
void av_log_set_callback(void(*callback)(void *, int, const char *, va_list))
Set the logging callback.
Definition: log.c:400
AVIODataMarkerType
Different data types that can be returned via the AVIO write_data_type callback.
Definition: avio.h:111
AVFormatContext * ctx
Definition: movenc.c:48
int n
Definition: avisynth_c.h:684
int force_iobuf_size
Definition: movenc.c:72
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 frames
Definition: movenc.c:65
int write_file
Definition: movenc.c:52
int64_t next_p_pts
Definition: movenc.c:67
static void mux_gops(int n)
Definition: movenc.c:316
int64_t audio_duration
Definition: movenc.c:64
static void help(void)
Definition: movenc.c:353
Stream structure.
Definition: avformat.h:873
AVIOContext * pb
I/O context.
Definition: avformat.h:1384
AVStream * audio_st
Definition: movenc.c:59
static void close_out(void)
Definition: movenc.c:152
static int getopt(int argc, char *argv[], char *opts)
Definition: getopt.c:41
void av_md5_init(AVMD5 *ctx)
Initialize MD5 hashing.
Definition: md5.c:143
void * buf
Definition: avisynth_c.h:690
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
double value
Definition: eval.c:98
static const char * format
Definition: movenc.c:47
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
cl_device_type type
AVPictureType
Definition: avutil.h:272
#define snprintf
Definition: snprintf.h:34
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4375
void av_md5_final(AVMD5 *ctx, uint8_t *dst)
Finish hashing and output digest value.
Definition: md5.c:192
static void init_out(const char *name)
Definition: movenc.c:137
#define check(value,...)
Definition: movenc.c:176
int skip_write_audio
Definition: movenc.c:70
int do_interleave
Definition: movenc.c:73
uint8_t level
Definition: svq3.c:207
static void init_count_warnings(void)
Definition: movenc.c:87
int check_faults
Definition: movenc.c:78
int sample_rate
Audio only.
Definition: avcodec.h:3994
Main libavformat public API header.
int clear_duration
Definition: movenc.c:71
int(* write_data_type)(void *opaque, uint8_t *buf, int buf_size, enum AVIODataMarkerType type, int64_t time)
A callback that is used instead of write_packet.
Definition: avio.h:319
static double c[64]
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:148
int main(int argc, char **argv)
Definition: movenc.c:359
Bi-dir predicted.
Definition: avutil.h:276
static void init(int bf, int audio_preroll)
Definition: movenc.c:242
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
static void signal_init_ts(void)
Definition: movenc.c:328
int den
Denominator.
Definition: rational.h:60
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:773
static void skip_gops(int n)
Definition: movenc.c:321
A point in the output bytestream where a decoder can start decoding (i.e.
Definition: avio.h:122
#define av_free(p)
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3898
int channels
Audio only.
Definition: avcodec.h:3990
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1429
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
static int io_write(void *opaque, uint8_t *buf, int size)
Definition: movenc.c:98
FILE * out
Definition: movenc.c:54
Public header for MD5 hash function implementation.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1020
static const uint8_t aac_extradata[]
Definition: movenc.c:42
int stream_index
Definition: avcodec.h:1432
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:902
This structure stores compressed data.
Definition: avcodec.h:1407
static void check_func(int value, int line, const char *msg,...)
Definition: movenc.c:164
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1423
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
Predicted.
Definition: avutil.h:275