FFmpeg
segment.c
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1 /*
2  * Copyright (c) 2011, Luca Barbato
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 /**
22  * @file generic segmenter
23  * M3U8 specification can be find here:
24  * @url{http://tools.ietf.org/id/draft-pantos-http-live-streaming}
25  */
26 
27 #include "config_components.h"
28 
29 #include <time.h>
30 
31 #include "avformat.h"
32 #include "internal.h"
33 #include "mux.h"
34 
35 #include "libavutil/avassert.h"
36 #include "libavutil/internal.h"
37 #include "libavutil/log.h"
38 #include "libavutil/mem.h"
39 #include "libavutil/opt.h"
40 #include "libavutil/avstring.h"
41 #include "libavutil/parseutils.h"
42 #include "libavutil/mathematics.h"
43 #include "libavutil/time.h"
44 #include "libavutil/timecode.h"
46 #include "libavutil/timestamp.h"
47 
48 typedef struct SegmentListEntry {
49  int index;
53  char *filename;
57 
58 typedef enum {
63  LIST_TYPE_EXT, ///< deprecated
66 } ListType;
67 
68 #define SEGMENT_LIST_FLAG_CACHE 1
69 #define SEGMENT_LIST_FLAG_LIVE 2
70 
71 typedef struct SegmentContext {
72  const AVClass *class; /**< Class for private options. */
73  int segment_idx; ///< index of the segment file to write, starting from 0
74  int segment_idx_wrap; ///< number after which the index wraps
75  int segment_idx_wrap_nb; ///< number of time the index has wraped
76  int segment_count; ///< number of segment files already written
79  char *format; ///< format to use for output segment files
81  char *list; ///< filename for the segment list file
82  int list_flags; ///< flags affecting list generation
83  int list_size; ///< number of entries for the segment list file
84 
85  int is_nullctx; ///< whether avf->pb is a nullctx
86  int use_clocktime; ///< flag to cut segments at regular clock time
87  int64_t clocktime_offset; //< clock offset for cutting the segments at regular clock time
88  int64_t clocktime_wrap_duration; //< wrapping duration considered for starting a new segment
89  int64_t last_val; ///< remember last time for wrap around detection
91  int header_written; ///< whether we've already called avformat_write_header
92 
93  char *entry_prefix; ///< prefix to add to list entry filenames
94  int list_type; ///< set the list type
95  AVIOContext *list_pb; ///< list file put-byte context
96  int64_t time; ///< segment duration
97  int64_t min_seg_duration; ///< minimum segment duration
98  int use_strftime; ///< flag to expand filename with strftime
99  int increment_tc; ///< flag to increment timecode if found
100 
101  char *times_str; ///< segment times specification string
102  int64_t *times; ///< list of segment interval specification
103  int nb_times; ///< number of elments in the times array
104 
105  char *frames_str; ///< segment frame numbers specification string
106  int *frames; ///< list of frame number specification
107  int nb_frames; ///< number of elments in the frames array
108  int frame_count; ///< total number of reference frames
109  int segment_frame_count; ///< number of reference frames in the segment
110 
112  int individual_header_trailer; /**< Set by a private option. */
113  int write_header_trailer; /**< Set by a private option. */
114  char *header_filename; ///< filename to write the output header to
115 
116  int reset_timestamps; ///< reset timestamps at the beginning of each segment
117  int64_t initial_offset; ///< initial timestamps offset, expressed in microseconds
118  char *reference_stream_specifier; ///< reference stream specifier
120  int64_t reference_stream_first_pts; ///< initial timestamp, expressed in microseconds
123 
125  char temp_list_filename[1024];
126 
131 
132 static void print_csv_escaped_str(AVIOContext *ctx, const char *str)
133 {
134  int needs_quoting = !!str[strcspn(str, "\",\n\r")];
135 
136  if (needs_quoting)
137  avio_w8(ctx, '"');
138 
139  for (; *str; str++) {
140  if (*str == '"')
141  avio_w8(ctx, '"');
142  avio_w8(ctx, *str);
143  }
144  if (needs_quoting)
145  avio_w8(ctx, '"');
146 }
147 
149 {
150  SegmentContext *seg = s->priv_data;
151  AVFormatContext *oc;
152  int i;
153  int ret;
154 
156  if (ret < 0)
157  return ret;
158  oc = seg->avf;
159 
160  oc->interrupt_callback = s->interrupt_callback;
161  oc->max_delay = s->max_delay;
162  av_dict_copy(&oc->metadata, s->metadata, 0);
163  oc->opaque = s->opaque;
164  oc->io_close2 = s->io_close2;
165  oc->io_open = s->io_open;
166  oc->flags = s->flags;
167 
168  for (i = 0; i < s->nb_streams; i++) {
169  AVStream *st, *ist = s->streams[i];
170  AVCodecParameters *ipar = ist->codecpar, *opar;
171 
172  st = ff_stream_clone(oc, ist);
173  if (!st)
174  return AVERROR(ENOMEM);
175  opar = st->codecpar;
176  if (!oc->oformat->codec_tag ||
177  av_codec_get_id (oc->oformat->codec_tag, ipar->codec_tag) == opar->codec_id ||
178  av_codec_get_tag(oc->oformat->codec_tag, ipar->codec_id) <= 0) {
179  opar->codec_tag = ipar->codec_tag;
180  } else {
181  opar->codec_tag = 0;
182  }
183  }
184 
185  return 0;
186 }
187 
189 {
190  SegmentContext *seg = s->priv_data;
191  AVFormatContext *oc = seg->avf;
192  size_t size;
193  int ret;
194  char buf[1024];
195  char *new_name;
196 
197  if (seg->segment_idx_wrap)
198  seg->segment_idx %= seg->segment_idx_wrap;
199  if (seg->use_strftime) {
200  time_t now0;
201  struct tm *tm, tmpbuf;
202  time(&now0);
203  tm = localtime_r(&now0, &tmpbuf);
204  if (!strftime(buf, sizeof(buf), s->url, tm)) {
205  av_log(oc, AV_LOG_ERROR, "Could not get segment filename with strftime\n");
206  return AVERROR(EINVAL);
207  }
208  } else if (av_get_frame_filename(buf, sizeof(buf),
209  s->url, seg->segment_idx) < 0) {
210  av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", s->url);
211  return AVERROR(EINVAL);
212  }
213  new_name = av_strdup(buf);
214  if (!new_name)
215  return AVERROR(ENOMEM);
216  ff_format_set_url(oc, new_name);
217 
218  /* copy modified name in list entry */
219  size = strlen(av_basename(oc->url)) + 1;
220  if (seg->entry_prefix)
221  size += strlen(seg->entry_prefix);
222 
223  if ((ret = av_reallocp(&seg->cur_entry.filename, size)) < 0)
224  return ret;
225  snprintf(seg->cur_entry.filename, size, "%s%s",
226  seg->entry_prefix ? seg->entry_prefix : "",
227  av_basename(oc->url));
228 
229  return 0;
230 }
231 
233 {
234  SegmentContext *seg = s->priv_data;
235  AVFormatContext *oc = seg->avf;
236  int err = 0;
237 
238  if (write_header) {
240  seg->avf = NULL;
241  if ((err = segment_mux_init(s)) < 0)
242  return err;
243  oc = seg->avf;
244  }
245 
246  seg->segment_idx++;
247  if ((seg->segment_idx_wrap) && (seg->segment_idx % seg->segment_idx_wrap == 0))
248  seg->segment_idx_wrap_nb++;
249 
250  if ((err = set_segment_filename(s)) < 0)
251  return err;
252 
253  if ((err = s->io_open(s, &oc->pb, oc->url, AVIO_FLAG_WRITE, NULL)) < 0) {
254  av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->url);
255  return err;
256  }
257  if (!seg->individual_header_trailer)
258  oc->pb->seekable = 0;
259 
260  if (oc->oformat->priv_class && oc->priv_data)
261  av_opt_set(oc->priv_data, "mpegts_flags", "+resend_headers", 0);
262 
263  if (write_header) {
266  av_dict_set(&options, "fflags", "-autobsf", 0);
267  err = avformat_write_header(oc, &options);
269  if (err < 0)
270  return err;
271  }
272 
273  seg->segment_frame_count = 0;
274  return 0;
275 }
276 
278 {
279  SegmentContext *seg = s->priv_data;
280  int ret;
281 
282  snprintf(seg->temp_list_filename, sizeof(seg->temp_list_filename), seg->use_rename ? "%s.tmp" : "%s", seg->list);
283  ret = s->io_open(s, &seg->list_pb, seg->temp_list_filename, AVIO_FLAG_WRITE, NULL);
284  if (ret < 0) {
285  av_log(s, AV_LOG_ERROR, "Failed to open segment list '%s'\n", seg->list);
286  return ret;
287  }
288 
289  if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) {
291  double max_duration = 0;
292 
293  avio_printf(seg->list_pb, "#EXTM3U\n");
294  avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n");
295  avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index);
296  avio_printf(seg->list_pb, "#EXT-X-ALLOW-CACHE:%s\n",
297  seg->list_flags & SEGMENT_LIST_FLAG_CACHE ? "YES" : "NO");
298 
299  av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%d\n",
301 
302  for (entry = seg->segment_list_entries; entry; entry = entry->next)
303  max_duration = FFMAX(max_duration, entry->end_time - entry->start_time);
304  avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration));
305  } else if (seg->list_type == LIST_TYPE_FFCONCAT) {
306  avio_printf(seg->list_pb, "ffconcat version 1.0\n");
307  }
308 
309  return ret;
310 }
311 
312 static void segment_list_print_entry(AVIOContext *list_ioctx,
313  ListType list_type,
314  const SegmentListEntry *list_entry,
315  void *log_ctx)
316 {
317  switch (list_type) {
318  case LIST_TYPE_FLAT:
319  avio_printf(list_ioctx, "%s\n", list_entry->filename);
320  break;
321  case LIST_TYPE_CSV:
322  case LIST_TYPE_EXT:
323  print_csv_escaped_str(list_ioctx, list_entry->filename);
324  avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time);
325  break;
326  case LIST_TYPE_M3U8:
327  avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n",
328  list_entry->end_time - list_entry->start_time, list_entry->filename);
329  break;
330  case LIST_TYPE_FFCONCAT:
331  {
332  char *buf;
333  if (av_escape(&buf, list_entry->filename, NULL, AV_ESCAPE_MODE_AUTO, AV_ESCAPE_FLAG_WHITESPACE) < 0) {
334  av_log(log_ctx, AV_LOG_WARNING,
335  "Error writing list entry '%s' in list file\n", list_entry->filename);
336  return;
337  }
338  avio_printf(list_ioctx, "file %s\n", buf);
339  av_free(buf);
340  break;
341  }
342  default:
343  av_assert0(!"Invalid list type");
344  }
345 }
346 
347 static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
348 {
349  SegmentContext *seg = s->priv_data;
350  AVFormatContext *oc = seg->avf;
351  int ret = 0;
352  AVTimecode tc;
353  AVRational rate;
354  AVDictionaryEntry *tcr;
355  char buf[AV_TIMECODE_STR_SIZE];
356  int i;
357  int err;
358 
359  if (!oc || !oc->pb)
360  return AVERROR(EINVAL);
361 
362  av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */
363  if (write_trailer)
364  ret = av_write_trailer(oc);
365 
366  if (ret < 0)
367  av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n",
368  oc->url);
369 
370  if (seg->list) {
371  if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) {
372  SegmentListEntry *entry = av_mallocz(sizeof(*entry));
373  if (!entry) {
374  ret = AVERROR(ENOMEM);
375  goto end;
376  }
377 
378  /* append new element */
379  memcpy(entry, &seg->cur_entry, sizeof(*entry));
380  entry->filename = av_strdup(entry->filename);
381  if (!seg->segment_list_entries)
383  else
386 
387  /* drop first item */
388  if (seg->list_size && seg->segment_count >= seg->list_size) {
391  av_freep(&entry->filename);
392  av_freep(&entry);
393  }
394 
395  if ((ret = segment_list_open(s)) < 0)
396  goto end;
397  for (entry = seg->segment_list_entries; entry; entry = entry->next)
399  if (seg->list_type == LIST_TYPE_M3U8 && is_last)
400  avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n");
401  ff_format_io_close(s, &seg->list_pb);
402  if (seg->use_rename)
403  ff_rename(seg->temp_list_filename, seg->list, s);
404  } else {
406  avio_flush(seg->list_pb);
407  }
408  }
409 
410  av_log(s, AV_LOG_VERBOSE, "segment:'%s' count:%d ended\n",
411  seg->avf->url, seg->segment_count);
412  seg->segment_count++;
413 
414  if (seg->increment_tc) {
415  tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
416  if (tcr) {
417  /* search the first video stream */
418  for (i = 0; i < s->nb_streams; i++) {
419  if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
420  rate = s->streams[i]->avg_frame_rate;/* Get fps from the video stream */
421  err = av_timecode_init_from_string(&tc, rate, tcr->value, s);
422  if (err < 0) {
423  av_log(s, AV_LOG_WARNING, "Could not increment global timecode, error occurred during timecode creation.\n");
424  break;
425  }
426  tc.start += (int)((seg->cur_entry.end_time - seg->cur_entry.start_time) * av_q2d(rate));/* increment timecode */
427  av_dict_set(&s->metadata, "timecode",
428  av_timecode_make_string(&tc, buf, 0), 0);
429  break;
430  }
431  }
432  } else {
433  av_log(s, AV_LOG_WARNING, "Could not increment global timecode, no global timecode metadata found.\n");
434  }
435  for (i = 0; i < s->nb_streams; i++) {
436  if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
437  char st_buf[AV_TIMECODE_STR_SIZE];
438  AVTimecode st_tc;
439  AVRational st_rate = s->streams[i]->avg_frame_rate;
440  AVDictionaryEntry *st_tcr = av_dict_get(s->streams[i]->metadata, "timecode", NULL, 0);
441  if (st_tcr) {
442  if ((av_timecode_init_from_string(&st_tc, st_rate, st_tcr->value, s) < 0)) {
443  av_log(s, AV_LOG_WARNING, "Could not increment stream %d timecode, error occurred during timecode creation.\n", i);
444  continue;
445  }
446  st_tc.start += (int)((seg->cur_entry.end_time - seg->cur_entry.start_time) * av_q2d(st_rate)); // increment timecode
447  av_dict_set(&s->streams[i]->metadata, "timecode", av_timecode_make_string(&st_tc, st_buf, 0), 0);
448  }
449  }
450  }
451  }
452 
453 end:
454  ff_format_io_close(oc, &oc->pb);
455 
456  return ret;
457 }
458 
459 static int parse_times(void *log_ctx, int64_t **times, int *nb_times,
460  const char *times_str)
461 {
462  char *p;
463  int i, ret = 0;
464  char *times_str1 = av_strdup(times_str);
465  char *saveptr = NULL;
466 
467  if (!times_str1)
468  return AVERROR(ENOMEM);
469 
470 #define FAIL(err) ret = err; goto end
471 
472  *nb_times = 1;
473  for (p = times_str1; *p; p++)
474  if (*p == ',')
475  (*nb_times)++;
476 
477  *times = av_malloc_array(*nb_times, sizeof(**times));
478  if (!*times) {
479  av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n");
480  FAIL(AVERROR(ENOMEM));
481  }
482 
483  p = times_str1;
484  for (i = 0; i < *nb_times; i++) {
485  int64_t t;
486  char *tstr = av_strtok(p, ",", &saveptr);
487  p = NULL;
488 
489  if (!tstr || !tstr[0]) {
490  av_log(log_ctx, AV_LOG_ERROR, "Empty time specification in times list %s\n",
491  times_str);
492  FAIL(AVERROR(EINVAL));
493  }
494 
495  ret = av_parse_time(&t, tstr, 1);
496  if (ret < 0) {
497  av_log(log_ctx, AV_LOG_ERROR,
498  "Invalid time duration specification '%s' in times list %s\n", tstr, times_str);
499  FAIL(AVERROR(EINVAL));
500  }
501  (*times)[i] = t;
502 
503  /* check on monotonicity */
504  if (i && (*times)[i-1] > (*times)[i]) {
505  av_log(log_ctx, AV_LOG_ERROR,
506  "Specified time %f is smaller than the last time %f\n",
507  (float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000);
508  FAIL(AVERROR(EINVAL));
509  }
510  }
511 
512 end:
513  av_free(times_str1);
514  return ret;
515 }
516 
517 static int parse_frames(void *log_ctx, int **frames, int *nb_frames,
518  const char *frames_str)
519 {
520  const char *p;
521  int i;
522 
523  *nb_frames = 1;
524  for (p = frames_str; *p; p++)
525  if (*p == ',')
526  (*nb_frames)++;
527 
528  *frames = av_malloc_array(*nb_frames, sizeof(**frames));
529  if (!*frames) {
530  av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced frames array\n");
531  return AVERROR(ENOMEM);
532  }
533 
534  p = frames_str;
535  for (i = 0; i < *nb_frames; i++) {
536  long int f;
537  char *tailptr;
538 
539  if (*p == '\0' || *p == ',') {
540  av_log(log_ctx, AV_LOG_ERROR, "Empty frame specification in frame list %s\n",
541  frames_str);
542  return AVERROR(EINVAL);
543  }
544  f = strtol(p, &tailptr, 10);
545  if (*tailptr != '\0' && *tailptr != ',' || f <= 0 || f >= INT_MAX) {
546  av_log(log_ctx, AV_LOG_ERROR,
547  "Invalid argument '%s', must be a positive integer < INT_MAX\n",
548  p);
549  return AVERROR(EINVAL);
550  }
551  if (*tailptr == ',')
552  tailptr++;
553  p = tailptr;
554  (*frames)[i] = f;
555 
556  /* check on monotonicity */
557  if (i && (*frames)[i-1] > (*frames)[i]) {
558  av_log(log_ctx, AV_LOG_ERROR,
559  "Specified frame %d is smaller than the last frame %d\n",
560  (*frames)[i], (*frames)[i-1]);
561  return AVERROR(EINVAL);
562  }
563  }
564 
565  return 0;
566 }
567 
569 {
570  int buf_size = 32768;
571  uint8_t *buf = av_malloc(buf_size);
572  if (!buf)
573  return AVERROR(ENOMEM);
574  *ctx = avio_alloc_context(buf, buf_size, 1, NULL, NULL, NULL, NULL);
575  if (!*ctx) {
576  av_free(buf);
577  return AVERROR(ENOMEM);
578  }
579  return 0;
580 }
581 
582 static void close_null_ctxp(AVIOContext **pb)
583 {
584  av_freep(&(*pb)->buffer);
585  avio_context_free(pb);
586 }
587 
589 {
590  SegmentContext *seg = s->priv_data;
591  int ret, i;
592 
593  seg->reference_stream_index = -1;
594  if (!strcmp(seg->reference_stream_specifier, "auto")) {
595  /* select first index of type with highest priority */
596  int type_index_map[AVMEDIA_TYPE_NB];
597  static const enum AVMediaType type_priority_list[] = {
603  };
604  enum AVMediaType type;
605 
606  for (i = 0; i < AVMEDIA_TYPE_NB; i++)
607  type_index_map[i] = -1;
608 
609  /* select first index for each type */
610  for (i = 0; i < s->nb_streams; i++) {
611  type = s->streams[i]->codecpar->codec_type;
612  if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1
613  /* ignore attached pictures/cover art streams */
614  && !(s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC))
615  type_index_map[type] = i;
616  }
617 
618  for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) {
619  type = type_priority_list[i];
620  if ((seg->reference_stream_index = type_index_map[type]) >= 0)
621  break;
622  }
623  } else {
624  for (i = 0; i < s->nb_streams; i++) {
625  ret = avformat_match_stream_specifier(s, s->streams[i],
627  if (ret < 0)
628  return ret;
629  if (ret > 0) {
630  seg->reference_stream_index = i;
631  break;
632  }
633  }
634  }
635 
636  if (seg->reference_stream_index < 0) {
637  av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n",
639  return AVERROR(EINVAL);
640  }
641 
642  return 0;
643 }
644 
646 {
647  SegmentContext *seg = s->priv_data;
648  SegmentListEntry *cur;
649 
650  ff_format_io_close(s, &seg->list_pb);
651  if (seg->avf) {
652  if (seg->is_nullctx)
653  close_null_ctxp(&seg->avf->pb);
654  else
655  ff_format_io_close(s, &seg->avf->pb);
657  seg->avf = NULL;
658  }
659  av_freep(&seg->times);
660  av_freep(&seg->frames);
661  av_freep(&seg->cur_entry.filename);
662 
663  cur = seg->segment_list_entries;
664  while (cur) {
665  SegmentListEntry *next = cur->next;
666  av_freep(&cur->filename);
667  av_free(cur);
668  cur = next;
669  }
670 }
671 
673 {
674  SegmentContext *seg = s->priv_data;
675  AVFormatContext *oc = seg->avf;
677  int ret;
678  int i;
679 
680  seg->segment_count = 0;
681  if (!seg->write_header_trailer)
682  seg->individual_header_trailer = 0;
683 
684  if (seg->header_filename) {
685  seg->write_header_trailer = 1;
686  seg->individual_header_trailer = 0;
687  }
688 
689  if (seg->initial_offset > 0) {
690  av_log(s, AV_LOG_WARNING, "NOTE: the option initial_offset is deprecated,"
691  "you can use output_ts_offset instead of it\n");
692  }
693 
694  if ((seg->time != 2000000) + !!seg->times_str + !!seg->frames_str > 1) {
696  "segment_time, segment_times, and segment_frames options "
697  "are mutually exclusive, select just one of them\n");
698  return AVERROR(EINVAL);
699  }
700 
701  if (seg->times_str || seg->frames_str)
702  seg->min_seg_duration = 0;
703 
704  if (seg->times_str) {
705  if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0)
706  return ret;
707  } else if (seg->frames_str) {
708  if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0)
709  return ret;
710  } else {
711  if (seg->use_clocktime) {
712  if (seg->time <= 0) {
713  av_log(s, AV_LOG_ERROR, "Invalid negative segment_time with segment_atclocktime option set\n");
714  return AVERROR(EINVAL);
715  }
716  seg->clocktime_offset = seg->time - (seg->clocktime_offset % seg->time);
717  }
718  if (seg->min_seg_duration > seg->time) {
719  av_log(s, AV_LOG_ERROR, "min_seg_duration cannot be greater than segment_time\n");
720  return AVERROR(EINVAL);
721  }
722  }
723 
724  if (seg->list) {
725  if (seg->list_type == LIST_TYPE_UNDEFINED) {
726  if (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV;
727  else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT;
728  else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8;
729  else if (av_match_ext(seg->list, "ffcat,ffconcat")) seg->list_type = LIST_TYPE_FFCONCAT;
730  else seg->list_type = LIST_TYPE_FLAT;
731  }
732  if (!seg->list_size && seg->list_type != LIST_TYPE_M3U8) {
733  if ((ret = segment_list_open(s)) < 0)
734  return ret;
735  } else {
736  const char *proto = avio_find_protocol_name(seg->list);
737  seg->use_rename = proto && !strcmp(proto, "file");
738  }
739  }
740 
741  if (seg->list_type == LIST_TYPE_EXT)
742  av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n");
743 
744  if ((ret = select_reference_stream(s)) < 0)
745  return ret;
746  av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n",
748  av_get_media_type_string(s->streams[seg->reference_stream_index]->codecpar->codec_type));
749 
751 
752  seg->oformat = av_guess_format(seg->format, s->url, NULL);
753 
754  if (!seg->oformat)
756  if (seg->oformat->flags & AVFMT_NOFILE) {
757  av_log(s, AV_LOG_ERROR, "format %s not supported.\n",
758  seg->oformat->name);
759  return AVERROR(EINVAL);
760  }
761 
762  if ((ret = segment_mux_init(s)) < 0)
763  return ret;
764 
765  if ((ret = set_segment_filename(s)) < 0)
766  return ret;
767  oc = seg->avf;
768 
769  if (seg->write_header_trailer) {
770  if ((ret = s->io_open(s, &oc->pb,
771  seg->header_filename ? seg->header_filename : oc->url,
772  AVIO_FLAG_WRITE, NULL)) < 0) {
773  av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->url);
774  return ret;
775  }
776  if (!seg->individual_header_trailer)
777  oc->pb->seekable = 0;
778  } else {
779  if ((ret = open_null_ctx(&oc->pb)) < 0)
780  return ret;
781  seg->is_nullctx = 1;
782  }
783 
785  av_dict_set(&options, "fflags", "-autobsf", 0);
787  if (av_dict_count(options)) {
789  "Some of the provided format options are not recognized\n");
791  return AVERROR(EINVAL);
792  }
794 
795  if (ret < 0) {
796  return ret;
797  }
798  seg->segment_frame_count = 0;
799 
800  av_assert0(s->nb_streams == oc->nb_streams);
803  if (ret < 0)
804  return ret;
805  seg->header_written = 1;
806  }
807 
808  for (i = 0; i < s->nb_streams; i++) {
809  AVStream *inner_st = oc->streams[i];
810  AVStream *outer_st = s->streams[i];
811  avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
812  }
813 
814  if (oc->avoid_negative_ts > 0 && s->avoid_negative_ts < 0)
815  s->avoid_negative_ts = 1;
816 
817  return ret;
818 }
819 
821 {
822  SegmentContext *seg = s->priv_data;
823  AVFormatContext *oc = seg->avf;
824  int ret;
825 
826  if (!seg->header_written) {
828  if (ret < 0)
829  return ret;
830  }
831 
832  if (!seg->write_header_trailer || seg->header_filename) {
833  if (seg->header_filename) {
834  av_write_frame(oc, NULL);
835  ff_format_io_close(oc, &oc->pb);
836  } else {
837  close_null_ctxp(&oc->pb);
838  seg->is_nullctx = 0;
839  }
840  if ((ret = oc->io_open(oc, &oc->pb, oc->url, AVIO_FLAG_WRITE, NULL)) < 0)
841  return ret;
842  if (!seg->individual_header_trailer)
843  oc->pb->seekable = 0;
844  }
845 
846  return 0;
847 }
848 
850 {
851  SegmentContext *seg = s->priv_data;
852  AVStream *st = s->streams[pkt->stream_index];
853  int64_t end_pts = INT64_MAX, offset, pkt_pts_avtb;
854  int start_frame = INT_MAX;
855  int ret;
856  struct tm ti;
857  int64_t usecs;
858  int64_t wrapped_val;
859 
860  if (!seg->avf || !seg->avf->pb)
861  return AVERROR(EINVAL);
862 
863  if (!st->codecpar->extradata_size) {
864  size_t pkt_extradata_size;
865  uint8_t *pkt_extradata = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &pkt_extradata_size);
866  if (pkt_extradata && pkt_extradata_size > 0) {
867  ret = ff_alloc_extradata(st->codecpar, pkt_extradata_size);
868  if (ret < 0) {
869  av_log(s, AV_LOG_WARNING, "Unable to add extradata to stream. Output segments may be invalid.\n");
870  goto calc_times;
871  }
872  memcpy(st->codecpar->extradata, pkt_extradata, pkt_extradata_size);
873  }
874  }
875 
876 calc_times:
877  if (seg->times) {
878  end_pts = seg->segment_count < seg->nb_times ?
879  seg->times[seg->segment_count] : INT64_MAX;
880  } else if (seg->frames) {
881  start_frame = seg->segment_count < seg->nb_frames ?
882  seg->frames[seg->segment_count] : INT_MAX;
883  } else {
884  if (seg->use_clocktime) {
885  int64_t avgt = av_gettime();
886  time_t sec = avgt / 1000000;
887  localtime_r(&sec, &ti);
888  usecs = (int64_t)(ti.tm_hour * 3600 + ti.tm_min * 60 + ti.tm_sec) * 1000000 + (avgt % 1000000);
889  wrapped_val = (usecs + seg->clocktime_offset) % seg->time;
890  if (wrapped_val < seg->last_val && wrapped_val < seg->clocktime_wrap_duration)
891  seg->cut_pending = 1;
892  seg->last_val = wrapped_val;
893  } else {
894  end_pts = seg->time * (seg->segment_count + 1);
895  }
896  }
897 
898  ff_dlog(s, "packet stream:%d pts:%s pts_time:%s duration_time:%s is_key:%d frame:%d\n",
902  pkt->stream_index == seg->reference_stream_index ? seg->frame_count : -1);
903 
906  pkt->pts != AV_NOPTS_VALUE) {
908  }
909 
911  end_pts += (INT64_MAX - end_pts >= seg->reference_stream_first_pts) ?
913  INT64_MAX - end_pts;
914  }
915 
916  if (pkt->pts != AV_NOPTS_VALUE)
917  pkt_pts_avtb = av_rescale_q(pkt->pts, st->time_base, AV_TIME_BASE_Q);
918 
919  if (pkt->stream_index == seg->reference_stream_index &&
921  (seg->segment_frame_count > 0 || seg->write_empty) &&
922  (seg->cut_pending || seg->frame_count >= start_frame ||
923  (pkt->pts != AV_NOPTS_VALUE &&
924  pkt_pts_avtb - seg->cur_entry.start_pts >= seg->min_seg_duration &&
926  end_pts - seg->time_delta, AV_TIME_BASE_Q) >= 0))) {
927  /* sanitize end time in case last packet didn't have a defined duration */
928  if (seg->cur_entry.last_duration == 0)
929  seg->cur_entry.end_time = (double)pkt->pts * av_q2d(st->time_base);
930 
931  if ((ret = segment_end(s, seg->individual_header_trailer, 0)) < 0)
932  goto fail;
933 
934  if ((ret = segment_start(s, seg->individual_header_trailer)) < 0)
935  goto fail;
936 
937  seg->cut_pending = 0;
942 
943  if (seg->times || (!seg->frames && !seg->use_clocktime) && seg->write_empty)
944  goto calc_times;
945  }
946 
947  if (pkt->stream_index == seg->reference_stream_index) {
948  if (pkt->pts != AV_NOPTS_VALUE)
949  seg->cur_entry.end_time =
950  FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base));
952  }
953 
954  if (seg->segment_frame_count == 0) {
955  av_log(s, AV_LOG_VERBOSE, "segment:'%s' starts with packet stream:%d pts:%s pts_time:%s frame:%d\n",
956  seg->avf->url, pkt->stream_index,
958  }
959 
960  av_log(s, AV_LOG_DEBUG, "stream:%d start_pts_time:%s pts:%s pts_time:%s dts:%s dts_time:%s",
961  pkt->stream_index,
965 
966  /* compute new timestamps */
969  if (pkt->pts != AV_NOPTS_VALUE)
970  pkt->pts += offset;
971  if (pkt->dts != AV_NOPTS_VALUE)
972  pkt->dts += offset;
973 
974  av_log(s, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
977 
979  seg->initial_offset || seg->reset_timestamps ||
981 
982 fail:
983  /* Use st->index here as the packet returned from ff_write_chained()
984  * is blank if interleaving has been used. */
985  if (st->index == seg->reference_stream_index) {
986  seg->frame_count++;
987  seg->segment_frame_count++;
988  }
989 
990  return ret;
991 }
992 
994 {
995  SegmentContext *seg = s->priv_data;
996  AVFormatContext *oc = seg->avf;
997  int ret;
998 
999  if (!oc)
1000  return 0;
1001 
1002  if (!seg->write_header_trailer) {
1003  if ((ret = segment_end(s, 0, 1)) < 0)
1004  return ret;
1005  if ((ret = open_null_ctx(&oc->pb)) < 0)
1006  return ret;
1007  seg->is_nullctx = 1;
1008  ret = av_write_trailer(oc);
1009  } else {
1010  ret = segment_end(s, 1, 1);
1011  }
1012  return ret;
1013 }
1014 
1016  const AVPacket *pkt)
1017 {
1018  SegmentContext *seg = s->priv_data;
1019  AVFormatContext *oc = seg->avf;
1020  if (ffofmt(oc->oformat)->check_bitstream) {
1021  AVStream *const ost = oc->streams[st->index];
1022  int ret = ffofmt(oc->oformat)->check_bitstream(oc, ost, pkt);
1023  if (ret == 1) {
1024  FFStream *const sti = ffstream(st);
1025  FFStream *const osti = ffstream(ost);
1026  sti->bsfc = osti->bsfc;
1027  osti->bsfc = NULL;
1028  }
1029  return ret;
1030  }
1031  return 1;
1032 }
1033 
1034 #define OFFSET(x) offsetof(SegmentContext, x)
1035 #define E AV_OPT_FLAG_ENCODING_PARAM
1036 static const AVOption options[] = {
1037  { "reference_stream", "set reference stream", OFFSET(reference_stream_specifier), AV_OPT_TYPE_STRING, {.str = "auto"}, 0, 0, E },
1038  { "segment_format", "set container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1039  { "segment_format_options", "set list of options for the container format used for the segments", OFFSET(format_options), AV_OPT_TYPE_DICT, {.str = NULL}, 0, 0, E },
1040  { "segment_list", "set the segment list filename", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1041  { "segment_header_filename", "write a single file containing the header", OFFSET(header_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1042 
1043  { "segment_list_flags","set flags affecting segment list generation", OFFSET(list_flags), AV_OPT_TYPE_FLAGS, {.i64 = SEGMENT_LIST_FLAG_CACHE }, 0, UINT_MAX, E, .unit = "list_flags"},
1044  { "cache", "allow list caching", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX, E, .unit = "list_flags"},
1045  { "live", "enable live-friendly list generation (useful for HLS)", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_LIVE }, INT_MIN, INT_MAX, E, .unit = "list_flags"},
1046 
1047  { "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1048 
1049  { "segment_list_type", "set the segment list type", OFFSET(list_type), AV_OPT_TYPE_INT, {.i64 = LIST_TYPE_UNDEFINED}, -1, LIST_TYPE_NB-1, E, .unit = "list_type" },
1050  { "flat", "flat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, E, .unit = "list_type" },
1051  { "csv", "csv format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV }, INT_MIN, INT_MAX, E, .unit = "list_type" },
1052  { "ext", "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT }, INT_MIN, INT_MAX, E, .unit = "list_type" },
1053  { "ffconcat", "ffconcat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FFCONCAT }, INT_MIN, INT_MAX, E, .unit = "list_type" },
1054  { "m3u8", "M3U8 format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, .unit = "list_type" },
1055  { "hls", "Apple HTTP Live Streaming compatible", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, .unit = "list_type" },
1056 
1057  { "segment_atclocktime", "set segment to be cut at clocktime", OFFSET(use_clocktime), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E},
1058  { "segment_clocktime_offset", "set segment clocktime offset", OFFSET(clocktime_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 86400000000LL, E},
1059  { "segment_clocktime_wrap_duration", "set segment clocktime wrapping duration", OFFSET(clocktime_wrap_duration), AV_OPT_TYPE_DURATION, {.i64 = INT64_MAX}, 0, INT64_MAX, E},
1060  { "segment_time", "set segment duration", OFFSET(time),AV_OPT_TYPE_DURATION, {.i64 = 2000000}, INT64_MIN, INT64_MAX, E },
1061  { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, E },
1062  { "min_seg_duration", "set minimum segment duration", OFFSET(min_seg_duration), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, E },
1063  { "segment_times", "set segment split time points", OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
1064  { "segment_frames", "set segment split frame numbers", OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
1065  { "segment_wrap", "set number after which the index wraps", OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1066  { "segment_list_entry_prefix", "set base url prefix for segments", OFFSET(entry_prefix), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1067  { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1068  { "segment_wrap_number", "set the number of wrap before the first segment", OFFSET(segment_idx_wrap_nb), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1069  { "strftime", "set filename expansion with strftime at segment creation", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1070  { "increment_tc", "increment timecode between each segment", OFFSET(increment_tc), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1071  { "break_non_keyframes", "allow breaking segments on non-keyframes", OFFSET(break_non_keyframes), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1072 
1073  { "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E },
1074  { "write_header_trailer", "write a header to the first segment and a trailer to the last one", OFFSET(write_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E },
1075  { "reset_timestamps", "reset timestamps at the beginning of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1076  { "initial_offset", "set initial timestamp offset", OFFSET(initial_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E },
1077  { "write_empty_segments", "allow writing empty 'filler' segments", OFFSET(write_empty), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1078  { NULL },
1079 };
1080 
1081 static const AVClass seg_class = {
1082  .class_name = "(stream) segment muxer",
1083  .item_name = av_default_item_name,
1084  .option = options,
1085  .version = LIBAVUTIL_VERSION_INT,
1086 };
1087 
1088 #if CONFIG_SEGMENT_MUXER
1090  .p.name = "segment",
1091  .p.long_name = NULL_IF_CONFIG_SMALL("segment"),
1092  .p.flags = AVFMT_NOFILE|AVFMT_GLOBALHEADER,
1093  .p.priv_class = &seg_class,
1094  .priv_data_size = sizeof(SegmentContext),
1095  .init = seg_init,
1099  .deinit = seg_free,
1101 };
1102 #endif
1103 
1104 #if CONFIG_STREAM_SEGMENT_MUXER
1106  .p.name = "stream_segment,ssegment",
1107  .p.long_name = NULL_IF_CONFIG_SMALL("streaming segment muxer"),
1108  .p.flags = AVFMT_NOFILE,
1109  .p.priv_class = &seg_class,
1110  .priv_data_size = sizeof(SegmentContext),
1111  .init = seg_init,
1115  .deinit = seg_free,
1117 };
1118 #endif
SEGMENT_LIST_FLAG_LIVE
#define SEGMENT_LIST_FLAG_LIVE
Definition: segment.c:69
SegmentContext::write_header_trailer
int write_header_trailer
Set by a private option.
Definition: segment.c:113
SegmentListEntry::index
int index
Definition: segment.c:49
AVMEDIA_TYPE_SUBTITLE
@ AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
av_codec_get_id
enum AVCodecID av_codec_get_id(const struct AVCodecTag *const *tags, unsigned int tag)
Get the AVCodecID for the given codec tag tag.
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:215
LIST_TYPE_UNDEFINED
@ LIST_TYPE_UNDEFINED
Definition: segment.c:59
AV_TIMECODE_STR_SIZE
#define AV_TIMECODE_STR_SIZE
Definition: timecode.h:33
SegmentContext::clocktime_wrap_duration
int64_t clocktime_wrap_duration
Definition: segment.c:88
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:69
entry
#define entry
Definition: aom_film_grain_template.c:66
SegmentContext::min_seg_duration
int64_t min_seg_duration
minimum segment duration
Definition: segment.c:97
SegmentContext::avf
AVFormatContext * avf
Definition: segment.c:78
AVOutputFormat::name
const char * name
Definition: avformat.h:510
AVSTREAM_INIT_IN_WRITE_HEADER
#define AVSTREAM_INIT_IN_WRITE_HEADER
stream parameters initialized in avformat_write_header
Definition: avformat.h:2508
AVERROR
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
opt.h
SegmentContext::list_pb
AVIOContext * list_pb
list file put-byte context
Definition: segment.c:95
av_compare_ts
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
FFStream::bsfc
struct AVBSFContext * bsfc
bitstream filter to run on stream
Definition: internal.h:150
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:47
segment_start
static int segment_start(AVFormatContext *s, int write_header)
Definition: segment.c:232
AV_PKT_DATA_NEW_EXTRADATA
@ AV_PKT_DATA_NEW_EXTRADATA
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: packet.h:56
AV_DISPOSITION_ATTACHED_PIC
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:674
av_dict_count
int av_dict_count(const AVDictionary *m)
Get number of entries in dictionary.
Definition: dict.c:39
LIST_TYPE_CSV
@ LIST_TYPE_CSV
Definition: segment.c:61
SegmentContext::use_clocktime
int use_clocktime
flag to cut segments at regular clock time
Definition: segment.c:86
avio_context_free
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:126
AV_TIME_BASE_Q
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:264
int64_t
long long int64_t
Definition: coverity.c:34
SegmentContext::list_type
int list_type
set the list type
Definition: segment.c:94
ff_stream_segment_muxer
const FFOutputFormat ff_stream_segment_muxer
SegmentContext::nb_frames
int nb_frames
number of elments in the frames array
Definition: segment.c:107
SegmentContext::segment_idx_wrap
int segment_idx_wrap
number after which the index wraps
Definition: segment.c:74
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1368
deinit
static void deinit(AVFormatContext *s)
Definition: chromaprint.c:52
segment_mux_init
static int segment_mux_init(AVFormatContext *s)
Definition: segment.c:148
avio_alloc_context
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, const 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:109
AVOption
AVOption.
Definition: opt.h:429
SegmentContext::segment_count
int segment_count
number of segment files already written
Definition: segment.c:76
SegmentContext::times_str
char * times_str
segment times specification string
Definition: segment.c:101
SegmentContext::break_non_keyframes
int break_non_keyframes
Definition: segment.c:121
AV_OPT_TYPE_DURATION
@ AV_OPT_TYPE_DURATION
Underlying C type is int64_t.
Definition: opt.h:319
SegmentContext::frames_str
char * frames_str
segment frame numbers specification string
Definition: segment.c:105
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:225
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:557
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:59
mathematics.h
AVDictionary
Definition: dict.c:34
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
FAIL
#define FAIL(err)
avformat_init_output
av_warn_unused_result 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:467
SegmentContext::cur_entry
SegmentListEntry cur_entry
Definition: segment.c:127
SegmentContext::list
char * list
filename for the segment list file
Definition: segment.c:81
av_get_frame_filename
int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
Definition: utils.c:346
SegmentListEntry::next
struct SegmentListEntry * next
Definition: segment.c:54
ost
static AVStream * ost
Definition: vaapi_transcode.c:42
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:594
av_basename
const char * av_basename(const char *path)
Thread safe basename.
Definition: avstring.c:252
SegmentContext::time
int64_t time
segment duration
Definition: segment.c:96
FFOutputFormat::p
AVOutputFormat p
The public AVOutputFormat.
Definition: mux.h:65
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:30
SegmentContext::use_rename
int use_rename
Definition: segment.c:124
SegmentContext::temp_list_filename
char temp_list_filename[1024]
Definition: segment.c:125
SegmentContext::is_nullctx
int is_nullctx
whether avf->pb is a nullctx
Definition: segment.c:85
segment_end
static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
Definition: segment.c:347
AVFormatContext::interrupt_callback
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1573
SegmentListEntry
Definition: segment.c:48
SegmentContext::nb_times
int nb_times
number of elments in the times array
Definition: segment.c:103
parse_frames
static int parse_frames(void *log_ctx, int **frames, int *nb_frames, const char *frames_str)
Definition: segment.c:517
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: avformat.c:867
seg_write_header
static int seg_write_header(AVFormatContext *s)
Definition: segment.c:820
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:358
av_escape
int av_escape(char **dst, const char *src, const char *special_chars, enum AVEscapeMode mode, int flags)
Escape string in src, and put the escaped string in an allocated string in *dst, which must be freed ...
Definition: avstring.c:327
fail
#define fail()
Definition: checkasm.h:193
frames
if it could not because there are no more frames
Definition: filter_design.txt:266
timecode.h
SegmentContext::reference_stream_index
int reference_stream_index
Definition: segment.c:119
AVTimecode::start
int start
timecode frame start (first base frame number)
Definition: timecode.h:42
SegmentContext::oformat
const AVOutputFormat * oformat
Definition: segment.c:77
type
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 type
Definition: writing_filters.txt:86
av_opt_set
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:835
close_null_ctxp
static void close_null_ctxp(AVIOContext **pb)
Definition: segment.c:582
SegmentContext::cut_pending
int cut_pending
Definition: segment.c:90
AV_ESCAPE_FLAG_WHITESPACE
#define AV_ESCAPE_FLAG_WHITESPACE
Consider spaces special and escape them even in the middle of the string.
Definition: avstring.h:329
ff_rename
int ff_rename(const char *url_src, const char *url_dst, void *logctx)
Wrap ffurl_move() and log if error happens.
Definition: avio.c:861
AVRational::num
int num
Numerator.
Definition: rational.h:59
select_reference_stream
static int select_reference_stream(AVFormatContext *s)
Definition: segment.c:588
seg_check_bitstream
static int seg_check_bitstream(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
Definition: segment.c:1015
SegmentContext::use_strftime
int use_strftime
flag to expand filename with strftime
Definition: segment.c:98
avassert.h
SegmentContext::reset_timestamps
int reset_timestamps
reset timestamps at the beginning of each segment
Definition: segment.c:116
ceil
static __device__ float ceil(float a)
Definition: cuda_runtime.h:176
SegmentContext::frame_count
int frame_count
total number of reference frames
Definition: segment.c:108
pkt
AVPacket * pkt
Definition: movenc.c:60
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:209
AVFormatContext::metadata
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1535
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
SegmentListEntry::offset_pts
int64_t offset_pts
Definition: segment.c:52
SegmentContext::format
char * format
format to use for output segment files
Definition: segment.c:79
seg_write_trailer
static int seg_write_trailer(struct AVFormatContext *s)
Definition: segment.c:993
av_dict_get
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:62
s
#define s(width, name)
Definition: cbs_vp9.c:198
AVFormatContext::flags
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1451
format
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
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
av_q2d
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
av_strtok
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok().
Definition: avstring.c:178
av_match_ext
int av_match_ext(const char *filename, const char *extensions)
Return a positive value if the given filename has one of the given extensions, 0 otherwise.
Definition: format.c:41
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:40
AVMEDIA_TYPE_NB
@ AVMEDIA_TYPE_NB
Definition: avutil.h:206
AVIO_FLAG_WRITE
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:618
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:230
ctx
AVFormatContext * ctx
Definition: movenc.c:49
SegmentContext::write_empty
int write_empty
Definition: segment.c:122
SegmentListEntry::last_duration
int64_t last_duration
Definition: segment.c:55
ffofmt
static const FFOutputFormat * ffofmt(const AVOutputFormat *fmt)
Definition: mux.h:167
av_rescale_q
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
AVOutputFormat::codec_tag
const struct AVCodecTag *const * codec_tag
List of supported codec_id-codec_tag pairs, ordered by "better choice first".
Definition: avformat.h:535
AVFormatContext::opaque
void * opaque
User data.
Definition: avformat.h:1862
AVMEDIA_TYPE_DATA
@ AVMEDIA_TYPE_DATA
Opaque data information usually continuous.
Definition: avutil.h:203
avformat_write_header
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:488
SegmentListEntry::start_pts
int64_t start_pts
Definition: segment.c:51
time_internal.h
if
if(ret)
Definition: filter_design.txt:179
seg_init
static int seg_init(AVFormatContext *s)
Definition: segment.c:672
avio_flush
void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:223
AVFormatContext
Format I/O context.
Definition: avformat.h:1300
internal.h
SegmentContext::format_options
AVDictionary * format_options
Definition: segment.c:80
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:771
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:75
AVStream::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:787
NULL
#define NULL
Definition: coverity.c:32
write_trailer
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:101
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
LIST_TYPE_EXT
@ LIST_TYPE_EXT
deprecated
Definition: segment.c:63
AV_OPT_TYPE_DICT
@ AV_OPT_TYPE_DICT
Underlying C type is AVDictionary*.
Definition: opt.h:290
SegmentContext::frames
int * frames
list of frame number specification
Definition: segment.c:106
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:237
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1342
parseutils.h
list
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 list
Definition: filter_design.txt:25
options
Definition: swscale.c:42
FFOutputFormat
Definition: mux.h:61
double
double
Definition: af_crystalizer.c:132
av_parse_time
int av_parse_time(int64_t *timeval, const char *timestr, int duration)
Parse timestr and return in *time a corresponding number of microseconds.
Definition: parseutils.c:592
time.h
avio_w8
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:179
SegmentContext::reference_stream_first_pts
int64_t reference_stream_first_pts
initial timestamp, expressed in microseconds
Definition: segment.c:120
set_segment_filename
static int set_segment_filename(AVFormatContext *s)
Definition: segment.c:188
AVOutputFormat::priv_class
const AVClass * priv_class
AVClass for the private context.
Definition: avformat.h:538
av_write_frame
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:1236
AV_ESCAPE_MODE_AUTO
@ AV_ESCAPE_MODE_AUTO
Use auto-selected escaping mode.
Definition: avstring.h:315
seg_write_packet
static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: segment.c:849
segment_list_open
static int segment_list_open(AVFormatContext *s)
Definition: segment.c:277
SegmentContext::clocktime_offset
int64_t clocktime_offset
Definition: segment.c:87
OFFSET
#define OFFSET(x)
Definition: segment.c:1034
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:73
AVFormatContext::nb_streams
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1356
AVOutputFormat::flags
int flags
can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS,...
Definition: avformat.h:529
ff_dlog
#define ff_dlog(a,...)
Definition: tableprint_vlc.h:28
SegmentContext::entry_prefix
char * entry_prefix
prefix to add to list entry filenames
Definition: segment.c:93
LIST_TYPE_FLAT
@ LIST_TYPE_FLAT
Definition: segment.c:60
SegmentContext::increment_tc
int increment_tc
flag to increment timecode if found
Definition: segment.c:99
print_csv_escaped_str
static void print_csv_escaped_str(AVIOContext *ctx, const char *str)
Definition: segment.c:132
SegmentContext::segment_list_entries_end
SegmentListEntry * segment_list_entries_end
Definition: segment.c:129
f
f
Definition: af_crystalizer.c:122
AVIOContext
Bytestream IO Context.
Definition: avio.h:160
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts.c:368
av_ts2timestr
#define av_ts2timestr(ts, tb)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:83
AVMediaType
AVMediaType
Definition: avutil.h:199
avformat_match_stream_specifier
int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
Check if the stream st contained in s is matched by the stream specifier spec.
Definition: avformat.c:693
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:94
av_codec_get_tag
unsigned int av_codec_get_tag(const struct AVCodecTag *const *tags, enum AVCodecID id)
Get the codec tag for the given codec id id.
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:261
FFStream
Definition: internal.h:132
localtime_r
#define localtime_r
Definition: time_internal.h:46
SegmentContext::time_delta
int64_t time_delta
Definition: segment.c:111
FFOutputFormat::check_bitstream
int(* check_bitstream)(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
Set up any necessary bitstream filtering and extract any extra data needed for the global header.
Definition: mux.h:163
AVFormatContext::url
char * url
input or output URL.
Definition: avformat.h:1416
size
int size
Definition: twinvq_data.h:10344
av_reallocp
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
Definition: mem.c:188
SegmentContext
Definition: f_segment.c:33
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
seg_free
static void seg_free(AVFormatContext *s)
Definition: segment.c:645
AVFMT_NOFILE
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:468
LIST_TYPE_NB
@ LIST_TYPE_NB
Definition: segment.c:65
ff_format_io_close
int ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: avformat.c:958
SegmentContext::header_written
int header_written
whether we've already called avformat_write_header
Definition: segment.c:91
ListType
ListType
Definition: segment.c:58
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:538
FFOutputFormat::interleave_packet
int(* interleave_packet)(AVFormatContext *s, AVPacket *pkt, int flush, int has_packet)
A format-specific function for interleavement.
Definition: mux.h:102
SegmentContext::segment_frame_count
int segment_frame_count
number of reference frames in the segment
Definition: segment.c:109
offset
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
Definition: writing_filters.txt:86
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:545
av_dict_free
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c:223
LIST_TYPE_M3U8
@ LIST_TYPE_M3U8
Definition: segment.c:62
SegmentContext::segment_idx_wrap_nb
int segment_idx_wrap_nb
number of time the index has wraped
Definition: segment.c:75
SegmentListEntry::end_time
double end_time
Definition: segment.c:50
SegmentContext::last_val
int64_t last_val
remember last time for wrap around detection
Definition: segment.c:89
av_write_trailer
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1298
SegmentContext::segment_idx
int segment_idx
index of the segment file to write, starting from 0
Definition: segment.c:73
SegmentContext::reference_stream_specifier
char * reference_stream_specifier
reference stream specifier
Definition: segment.c:118
log.h
AVFMT_GLOBALHEADER
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:478
AVOutputFormat
Definition: avformat.h:509
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:532
SegmentListEntry::start_time
double start_time
Definition: segment.c:50
av_packet_get_side_data
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, size_t *size)
Get side information from packet.
Definition: packet.c:252
internal.h
AVERROR_MUXER_NOT_FOUND
#define AVERROR_MUXER_NOT_FOUND
Muxer not found.
Definition: error.h:62
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:31
check_bitstream
static int check_bitstream(AVFormatContext *s, FFStream *sti, AVPacket *pkt)
Definition: mux.c:1116
AVFormatContext::avoid_negative_ts
int avoid_negative_ts
Avoid negative timestamps during muxing.
Definition: avformat.h:1687
AVMEDIA_TYPE_ATTACHMENT
@ AVMEDIA_TYPE_ATTACHMENT
Opaque data information usually sparse.
Definition: avutil.h:205
AVFormatContext::max_delay
int max_delay
Definition: avformat.h:1445
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:256
SegmentContext::list_size
int list_size
number of entries for the segment list file
Definition: segment.c:83
write_packet
static int write_packet(Muxer *mux, OutputStream *ost, AVPacket *pkt)
Definition: ffmpeg_mux.c:209
SegmentContext::segment_list_entries
SegmentListEntry * segment_list_entries
Definition: segment.c:128
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:748
AVClass::class_name
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:80
AVFormatContext::oformat
const struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1319
avformat.h
E
#define E
Definition: segment.c:1035
avio_printf
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
Writes a formatted string to the context.
av_get_media_type_string
const char * av_get_media_type_string(enum AVMediaType media_type)
Return a string describing the media_type enum, NULL if media_type is unknown.
Definition: utils.c:28
AVStream::index
int index
stream index in AVFormatContext
Definition: avformat.h:754
AVRational::den
int den
Denominator.
Definition: rational.h:60
options
static const AVOption options[]
Definition: segment.c:1036
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition: opt.h:259
segment_list_print_entry
static void segment_list_print_entry(AVIOContext *list_ioctx, ListType list_type, const SegmentListEntry *list_entry, void *log_ctx)
Definition: segment.c:312
avformat_free_context
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: avformat.c:149
SegmentContext::header_filename
char * header_filename
filename to write the output header to
Definition: segment.c:114
AVFormatContext::io_open
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
A callback for opening new IO streams.
Definition: avformat.h:1903
SegmentContext::individual_header_trailer
int individual_header_trailer
Set by a private option.
Definition: segment.c:112
SegmentContext::list_flags
int list_flags
flags affecting list generation
Definition: segment.c:82
AVPacket::stream_index
int stream_index
Definition: packet.h:541
seg_class
static const AVClass seg_class
Definition: segment.c:1081
SegmentContext::times
int64_t * times
list of segment interval specification
Definition: segment.c:102
av_gettime
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
av_strdup
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:272
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
av_guess_format
const 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:79
mem.h
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
AVDictionaryEntry
Definition: dict.h:89
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:55
ff_stream_clone
AVStream * ff_stream_clone(AVFormatContext *dst_ctx, const AVStream *src)
Create a new stream and copy to it all parameters from a source stream, with the exception of the ind...
Definition: avformat.c:317
AVPacket
This structure stores compressed data.
Definition: packet.h:516
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Underlying C type is int.
Definition: opt.h:327
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
av_dict_set
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:88
av_dict_copy
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:237
SEGMENT_LIST_FLAG_CACHE
#define SEGMENT_LIST_FLAG_CACHE
Definition: segment.c:68
AVFormatContext::io_close2
int(* io_close2)(struct AVFormatContext *s, AVIOContext *pb)
A callback for closing the streams opened with AVFormatContext.io_open().
Definition: avformat.h:1917
parse_times
static int parse_times(void *log_ctx, int64_t **times, int *nb_times, const char *times_str)
Definition: segment.c:459
avio_find_protocol_name
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:657
AV_OPT_TYPE_FLAGS
@ AV_OPT_TYPE_FLAGS
Underlying C type is unsigned int.
Definition: opt.h:255
timestamp.h
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
SegmentContext::initial_offset
int64_t initial_offset
initial timestamps offset, expressed in microseconds
Definition: segment.c:117
av_ts2str
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:54
av_timecode_init_from_string
int av_timecode_init_from_string(AVTimecode *tc, AVRational rate, const char *str, void *log_ctx)
Parse timecode representation (hh:mm:ss[:;.
Definition: timecode.c:253
AVDictionaryEntry::value
char * value
Definition: dict.h:91
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Underlying C type is a uint8_t* that is either NULL or points to a C string allocated with the av_mal...
Definition: opt.h:276
write_header
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:348
AVTimecode
Definition: timecode.h:41
avformat_alloc_output_context2
int avformat_alloc_output_context2(AVFormatContext **ctx, const AVOutputFormat *oformat, const char *format_name, const char *filename)
Allocate an AVFormatContext for an output format.
Definition: mux.c:95
AVStream::pts_wrap_bits
int pts_wrap_bits
Number of bits in timestamps.
Definition: avformat.h:923
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Special option type for declaring named constants.
Definition: opt.h:299
ff_segment_muxer
const FFOutputFormat ff_segment_muxer
snprintf
#define snprintf
Definition: snprintf.h:34
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1328
ff_format_set_url
void ff_format_set_url(AVFormatContext *s, char *url)
Set AVFormatContext url field to the provided pointer.
Definition: avformat.c:951
open_null_ctx
static int open_null_ctx(AVIOContext **ctx)
Definition: segment.c:568
av_timecode_make_string
char * av_timecode_make_string(const AVTimecode *tc, char *buf, int framenum_arg)
Load timecode string in buf.
Definition: timecode.c:103
LIST_TYPE_FFCONCAT
@ LIST_TYPE_FFCONCAT
Definition: segment.c:64
ff_alloc_extradata
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0.
Definition: utils.c:227
mux.h
SegmentListEntry::filename
char * filename
Definition: segment.c:53
ff_write_chained
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:1397