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 <float.h>
28 #include <time.h>
29 
30 #include "avformat.h"
31 #include "avio_internal.h"
32 #include "internal.h"
33 
34 #include "libavutil/avassert.h"
35 #include "libavutil/internal.h"
36 #include "libavutil/log.h"
37 #include "libavutil/opt.h"
38 #include "libavutil/avstring.h"
39 #include "libavutil/parseutils.h"
40 #include "libavutil/mathematics.h"
41 #include "libavutil/time.h"
42 #include "libavutil/timecode.h"
44 #include "libavutil/timestamp.h"
45 
46 typedef struct SegmentListEntry {
47  int index;
49  int64_t start_pts;
50  int64_t offset_pts;
51  char *filename;
53  int64_t last_duration;
55 
56 typedef enum {
61  LIST_TYPE_EXT, ///< deprecated
64 } ListType;
65 
66 #define SEGMENT_LIST_FLAG_CACHE 1
67 #define SEGMENT_LIST_FLAG_LIVE 2
68 
69 typedef struct SegmentContext {
70  const AVClass *class; /**< Class for private options. */
71  int segment_idx; ///< index of the segment file to write, starting from 0
72  int segment_idx_wrap; ///< number after which the index wraps
73  int segment_idx_wrap_nb; ///< number of time the index has wraped
74  int segment_count; ///< number of segment files already written
77  char *format; ///< format to use for output segment files
79  char *list; ///< filename for the segment list file
80  int list_flags; ///< flags affecting list generation
81  int list_size; ///< number of entries for the segment list file
82 
83  int is_nullctx; ///< whether avf->pb is a nullctx
84  int use_clocktime; ///< flag to cut segments at regular clock time
85  int64_t clocktime_offset; //< clock offset for cutting the segments at regular clock time
86  int64_t clocktime_wrap_duration; //< wrapping duration considered for starting a new segment
87  int64_t last_val; ///< remember last time for wrap around detection
89  int header_written; ///< whether we've already called avformat_write_header
90 
91  char *entry_prefix; ///< prefix to add to list entry filenames
92  int list_type; ///< set the list type
93  AVIOContext *list_pb; ///< list file put-byte context
94  int64_t time; ///< segment duration
95  int use_strftime; ///< flag to expand filename with strftime
96  int increment_tc; ///< flag to increment timecode if found
97 
98  char *times_str; ///< segment times specification string
99  int64_t *times; ///< list of segment interval specification
100  int nb_times; ///< number of elments in the times array
101 
102  char *frames_str; ///< segment frame numbers specification string
103  int *frames; ///< list of frame number specification
104  int nb_frames; ///< number of elments in the frames array
105  int frame_count; ///< total number of reference frames
106  int segment_frame_count; ///< number of reference frames in the segment
107 
108  int64_t time_delta;
109  int individual_header_trailer; /**< Set by a private option. */
110  int write_header_trailer; /**< Set by a private option. */
111  char *header_filename; ///< filename to write the output header to
112 
113  int reset_timestamps; ///< reset timestamps at the beginning of each segment
114  int64_t initial_offset; ///< initial timestamps offset, expressed in microseconds
115  char *reference_stream_specifier; ///< reference stream specifier
119 
121  char temp_list_filename[1024];
122 
127 
128 static void print_csv_escaped_str(AVIOContext *ctx, const char *str)
129 {
130  int needs_quoting = !!str[strcspn(str, "\",\n\r")];
131 
132  if (needs_quoting)
133  avio_w8(ctx, '"');
134 
135  for (; *str; str++) {
136  if (*str == '"')
137  avio_w8(ctx, '"');
138  avio_w8(ctx, *str);
139  }
140  if (needs_quoting)
141  avio_w8(ctx, '"');
142 }
143 
145 {
146  SegmentContext *seg = s->priv_data;
147  AVFormatContext *oc;
148  int i;
149  int ret;
150 
152  if (ret < 0)
153  return ret;
154  oc = seg->avf;
155 
156  oc->interrupt_callback = s->interrupt_callback;
157  oc->max_delay = s->max_delay;
158  av_dict_copy(&oc->metadata, s->metadata, 0);
159  oc->opaque = s->opaque;
160  oc->io_close = s->io_close;
161  oc->io_open = s->io_open;
162  oc->flags = s->flags;
163 
164  for (i = 0; i < s->nb_streams; i++) {
165  AVStream *st, *ist = s->streams[i];
166  AVCodecParameters *ipar = ist->codecpar, *opar;
167 
168  if (!(st = avformat_new_stream(oc, NULL)))
169  return AVERROR(ENOMEM);
171  if (ret < 0)
172  return ret;
173  opar = st->codecpar;
174  if (!oc->oformat->codec_tag ||
175  av_codec_get_id (oc->oformat->codec_tag, ipar->codec_tag) == opar->codec_id ||
176  av_codec_get_tag(oc->oformat->codec_tag, ipar->codec_id) <= 0) {
177  opar->codec_tag = ipar->codec_tag;
178  } else {
179  opar->codec_tag = 0;
180  }
181  }
182 
183  return 0;
184 }
185 
187 {
188  SegmentContext *seg = s->priv_data;
189  AVFormatContext *oc = seg->avf;
190  size_t size;
191  int ret;
192  char buf[1024];
193  char *new_name;
194 
195  if (seg->segment_idx_wrap)
196  seg->segment_idx %= seg->segment_idx_wrap;
197  if (seg->use_strftime) {
198  time_t now0;
199  struct tm *tm, tmpbuf;
200  time(&now0);
201  tm = localtime_r(&now0, &tmpbuf);
202  if (!strftime(buf, sizeof(buf), s->url, tm)) {
203  av_log(oc, AV_LOG_ERROR, "Could not get segment filename with strftime\n");
204  return AVERROR(EINVAL);
205  }
206  } else if (av_get_frame_filename(buf, sizeof(buf),
207  s->url, seg->segment_idx) < 0) {
208  av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", s->url);
209  return AVERROR(EINVAL);
210  }
211  new_name = av_strdup(buf);
212  if (!new_name)
213  return AVERROR(ENOMEM);
214  ff_format_set_url(oc, new_name);
215 
216  /* copy modified name in list entry */
217  size = strlen(av_basename(oc->url)) + 1;
218  if (seg->entry_prefix)
219  size += strlen(seg->entry_prefix);
220 
221  if ((ret = av_reallocp(&seg->cur_entry.filename, size)) < 0)
222  return ret;
223  snprintf(seg->cur_entry.filename, size, "%s%s",
224  seg->entry_prefix ? seg->entry_prefix : "",
225  av_basename(oc->url));
226 
227  return 0;
228 }
229 
231 {
232  SegmentContext *seg = s->priv_data;
233  AVFormatContext *oc = seg->avf;
234  int err = 0;
235 
236  if (write_header) {
238  seg->avf = NULL;
239  if ((err = segment_mux_init(s)) < 0)
240  return err;
241  oc = seg->avf;
242  }
243 
244  seg->segment_idx++;
245  if ((seg->segment_idx_wrap) && (seg->segment_idx % seg->segment_idx_wrap == 0))
246  seg->segment_idx_wrap_nb++;
247 
248  if ((err = set_segment_filename(s)) < 0)
249  return err;
250 
251  if ((err = s->io_open(s, &oc->pb, oc->url, AVIO_FLAG_WRITE, NULL)) < 0) {
252  av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->url);
253  return err;
254  }
255  if (!seg->individual_header_trailer)
256  oc->pb->seekable = 0;
257 
258  if (oc->oformat->priv_class && oc->priv_data)
259  av_opt_set(oc->priv_data, "mpegts_flags", "+resend_headers", 0);
260 
261  if (write_header) {
264  av_dict_set(&options, "fflags", "-autobsf", 0);
265  err = avformat_write_header(oc, &options);
267  if (err < 0)
268  return err;
269  }
270 
271  seg->segment_frame_count = 0;
272  return 0;
273 }
274 
276 {
277  SegmentContext *seg = s->priv_data;
278  int ret;
279 
280  snprintf(seg->temp_list_filename, sizeof(seg->temp_list_filename), seg->use_rename ? "%s.tmp" : "%s", seg->list);
281  ret = s->io_open(s, &seg->list_pb, seg->temp_list_filename, AVIO_FLAG_WRITE, NULL);
282  if (ret < 0) {
283  av_log(s, AV_LOG_ERROR, "Failed to open segment list '%s'\n", seg->list);
284  return ret;
285  }
286 
287  if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) {
288  SegmentListEntry *entry;
289  double max_duration = 0;
290 
291  avio_printf(seg->list_pb, "#EXTM3U\n");
292  avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n");
293  avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index);
294  avio_printf(seg->list_pb, "#EXT-X-ALLOW-CACHE:%s\n",
295  seg->list_flags & SEGMENT_LIST_FLAG_CACHE ? "YES" : "NO");
296 
297  av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%d\n",
299 
300  for (entry = seg->segment_list_entries; entry; entry = entry->next)
301  max_duration = FFMAX(max_duration, entry->end_time - entry->start_time);
302  avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration));
303  } else if (seg->list_type == LIST_TYPE_FFCONCAT) {
304  avio_printf(seg->list_pb, "ffconcat version 1.0\n");
305  }
306 
307  return ret;
308 }
309 
310 static void segment_list_print_entry(AVIOContext *list_ioctx,
311  ListType list_type,
312  const SegmentListEntry *list_entry,
313  void *log_ctx)
314 {
315  switch (list_type) {
316  case LIST_TYPE_FLAT:
317  avio_printf(list_ioctx, "%s\n", list_entry->filename);
318  break;
319  case LIST_TYPE_CSV:
320  case LIST_TYPE_EXT:
321  print_csv_escaped_str(list_ioctx, list_entry->filename);
322  avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time);
323  break;
324  case LIST_TYPE_M3U8:
325  avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n",
326  list_entry->end_time - list_entry->start_time, list_entry->filename);
327  break;
328  case LIST_TYPE_FFCONCAT:
329  {
330  char *buf;
331  if (av_escape(&buf, list_entry->filename, NULL, AV_ESCAPE_MODE_AUTO, AV_ESCAPE_FLAG_WHITESPACE) < 0) {
332  av_log(log_ctx, AV_LOG_WARNING,
333  "Error writing list entry '%s' in list file\n", list_entry->filename);
334  return;
335  }
336  avio_printf(list_ioctx, "file %s\n", buf);
337  av_free(buf);
338  break;
339  }
340  default:
341  av_assert0(!"Invalid list type");
342  }
343 }
344 
345 static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
346 {
347  SegmentContext *seg = s->priv_data;
348  AVFormatContext *oc = seg->avf;
349  int ret = 0;
350  AVTimecode tc;
351  AVRational rate;
352  AVDictionaryEntry *tcr;
353  char buf[AV_TIMECODE_STR_SIZE];
354  int i;
355  int err;
356 
357  if (!oc || !oc->pb)
358  return AVERROR(EINVAL);
359 
360  av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */
361  if (write_trailer)
362  ret = av_write_trailer(oc);
363 
364  if (ret < 0)
365  av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n",
366  oc->url);
367 
368  if (seg->list) {
369  if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) {
370  SegmentListEntry *entry = av_mallocz(sizeof(*entry));
371  if (!entry) {
372  ret = AVERROR(ENOMEM);
373  goto end;
374  }
375 
376  /* append new element */
377  memcpy(entry, &seg->cur_entry, sizeof(*entry));
378  entry->filename = av_strdup(entry->filename);
379  if (!seg->segment_list_entries)
381  else
382  seg->segment_list_entries_end->next = entry;
383  seg->segment_list_entries_end = entry;
384 
385  /* drop first item */
386  if (seg->list_size && seg->segment_count >= seg->list_size) {
387  entry = seg->segment_list_entries;
389  av_freep(&entry->filename);
390  av_freep(&entry);
391  }
392 
393  if ((ret = segment_list_open(s)) < 0)
394  goto end;
395  for (entry = seg->segment_list_entries; entry; entry = entry->next)
396  segment_list_print_entry(seg->list_pb, seg->list_type, entry, s);
397  if (seg->list_type == LIST_TYPE_M3U8 && is_last)
398  avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n");
399  ff_format_io_close(s, &seg->list_pb);
400  if (seg->use_rename)
401  ff_rename(seg->temp_list_filename, seg->list, s);
402  } else {
404  avio_flush(seg->list_pb);
405  }
406  }
407 
408  av_log(s, AV_LOG_VERBOSE, "segment:'%s' count:%d ended\n",
409  seg->avf->url, seg->segment_count);
410  seg->segment_count++;
411 
412  if (seg->increment_tc) {
413  tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
414  if (tcr) {
415  /* search the first video stream */
416  for (i = 0; i < s->nb_streams; i++) {
417  if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
418  rate = s->streams[i]->avg_frame_rate;/* Get fps from the video stream */
419  err = av_timecode_init_from_string(&tc, rate, tcr->value, s);
420  if (err < 0) {
421  av_log(s, AV_LOG_WARNING, "Could not increment global timecode, error occurred during timecode creation.\n");
422  break;
423  }
424  tc.start += (int)((seg->cur_entry.end_time - seg->cur_entry.start_time) * av_q2d(rate));/* increment timecode */
425  av_dict_set(&s->metadata, "timecode",
426  av_timecode_make_string(&tc, buf, 0), 0);
427  break;
428  }
429  }
430  } else {
431  av_log(s, AV_LOG_WARNING, "Could not increment global timecode, no global timecode metadata found.\n");
432  }
433  for (i = 0; i < s->nb_streams; i++) {
434  if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
435  char st_buf[AV_TIMECODE_STR_SIZE];
436  AVTimecode st_tc;
437  AVRational st_rate = s->streams[i]->avg_frame_rate;
438  AVDictionaryEntry *st_tcr = av_dict_get(s->streams[i]->metadata, "timecode", NULL, 0);
439  if (st_tcr) {
440  if ((av_timecode_init_from_string(&st_tc, st_rate, st_tcr->value, s) < 0)) {
441  av_log(s, AV_LOG_WARNING, "Could not increment stream %d timecode, error occurred during timecode creation.\n", i);
442  continue;
443  }
444  st_tc.start += (int)((seg->cur_entry.end_time - seg->cur_entry.start_time) * av_q2d(st_rate)); // increment timecode
445  av_dict_set(&s->streams[i]->metadata, "timecode", av_timecode_make_string(&st_tc, st_buf, 0), 0);
446  }
447  }
448  }
449  }
450 
451 end:
452  ff_format_io_close(oc, &oc->pb);
453 
454  return ret;
455 }
456 
457 static int parse_times(void *log_ctx, int64_t **times, int *nb_times,
458  const char *times_str)
459 {
460  char *p;
461  int i, ret = 0;
462  char *times_str1 = av_strdup(times_str);
463  char *saveptr = NULL;
464 
465  if (!times_str1)
466  return AVERROR(ENOMEM);
467 
468 #define FAIL(err) ret = err; goto end
469 
470  *nb_times = 1;
471  for (p = times_str1; *p; p++)
472  if (*p == ',')
473  (*nb_times)++;
474 
475  *times = av_malloc_array(*nb_times, sizeof(**times));
476  if (!*times) {
477  av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n");
478  FAIL(AVERROR(ENOMEM));
479  }
480 
481  p = times_str1;
482  for (i = 0; i < *nb_times; i++) {
483  int64_t t;
484  char *tstr = av_strtok(p, ",", &saveptr);
485  p = NULL;
486 
487  if (!tstr || !tstr[0]) {
488  av_log(log_ctx, AV_LOG_ERROR, "Empty time specification in times list %s\n",
489  times_str);
490  FAIL(AVERROR(EINVAL));
491  }
492 
493  ret = av_parse_time(&t, tstr, 1);
494  if (ret < 0) {
495  av_log(log_ctx, AV_LOG_ERROR,
496  "Invalid time duration specification '%s' in times list %s\n", tstr, times_str);
497  FAIL(AVERROR(EINVAL));
498  }
499  (*times)[i] = t;
500 
501  /* check on monotonicity */
502  if (i && (*times)[i-1] > (*times)[i]) {
503  av_log(log_ctx, AV_LOG_ERROR,
504  "Specified time %f is smaller than the last time %f\n",
505  (float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000);
506  FAIL(AVERROR(EINVAL));
507  }
508  }
509 
510 end:
511  av_free(times_str1);
512  return ret;
513 }
514 
515 static int parse_frames(void *log_ctx, int **frames, int *nb_frames,
516  const char *frames_str)
517 {
518  const char *p;
519  int i;
520 
521  *nb_frames = 1;
522  for (p = frames_str; *p; p++)
523  if (*p == ',')
524  (*nb_frames)++;
525 
526  *frames = av_malloc_array(*nb_frames, sizeof(**frames));
527  if (!*frames) {
528  av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced frames array\n");
529  return AVERROR(ENOMEM);
530  }
531 
532  p = frames_str;
533  for (i = 0; i < *nb_frames; i++) {
534  long int f;
535  char *tailptr;
536 
537  if (*p == '\0' || *p == ',') {
538  av_log(log_ctx, AV_LOG_ERROR, "Empty frame specification in frame list %s\n",
539  frames_str);
540  return AVERROR(EINVAL);
541  }
542  f = strtol(p, &tailptr, 10);
543  if (*tailptr != '\0' && *tailptr != ',' || f <= 0 || f >= INT_MAX) {
544  av_log(log_ctx, AV_LOG_ERROR,
545  "Invalid argument '%s', must be a positive integer < INT_MAX\n",
546  p);
547  return AVERROR(EINVAL);
548  }
549  if (*tailptr == ',')
550  tailptr++;
551  p = tailptr;
552  (*frames)[i] = f;
553 
554  /* check on monotonicity */
555  if (i && (*frames)[i-1] > (*frames)[i]) {
556  av_log(log_ctx, AV_LOG_ERROR,
557  "Specified frame %d is smaller than the last frame %d\n",
558  (*frames)[i], (*frames)[i-1]);
559  return AVERROR(EINVAL);
560  }
561  }
562 
563  return 0;
564 }
565 
567 {
568  int buf_size = 32768;
569  uint8_t *buf = av_malloc(buf_size);
570  if (!buf)
571  return AVERROR(ENOMEM);
572  *ctx = avio_alloc_context(buf, buf_size, AVIO_FLAG_WRITE, NULL, NULL, NULL, NULL);
573  if (!*ctx) {
574  av_free(buf);
575  return AVERROR(ENOMEM);
576  }
577  return 0;
578 }
579 
580 static void close_null_ctxp(AVIOContext **pb)
581 {
582  av_freep(&(*pb)->buffer);
583  avio_context_free(pb);
584 }
585 
587 {
588  SegmentContext *seg = s->priv_data;
589  int ret, i;
590 
591  seg->reference_stream_index = -1;
592  if (!strcmp(seg->reference_stream_specifier, "auto")) {
593  /* select first index of type with highest priority */
594  int type_index_map[AVMEDIA_TYPE_NB];
595  static const enum AVMediaType type_priority_list[] = {
601  };
602  enum AVMediaType type;
603 
604  for (i = 0; i < AVMEDIA_TYPE_NB; i++)
605  type_index_map[i] = -1;
606 
607  /* select first index for each type */
608  for (i = 0; i < s->nb_streams; i++) {
609  type = s->streams[i]->codecpar->codec_type;
610  if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1
611  /* ignore attached pictures/cover art streams */
612  && !(s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC))
613  type_index_map[type] = i;
614  }
615 
616  for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) {
617  type = type_priority_list[i];
618  if ((seg->reference_stream_index = type_index_map[type]) >= 0)
619  break;
620  }
621  } else {
622  for (i = 0; i < s->nb_streams; i++) {
623  ret = avformat_match_stream_specifier(s, s->streams[i],
625  if (ret < 0)
626  return ret;
627  if (ret > 0) {
628  seg->reference_stream_index = i;
629  break;
630  }
631  }
632  }
633 
634  if (seg->reference_stream_index < 0) {
635  av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n",
637  return AVERROR(EINVAL);
638  }
639 
640  return 0;
641 }
642 
644 {
645  SegmentContext *seg = s->priv_data;
646  SegmentListEntry *cur;
647 
648  ff_format_io_close(s, &seg->list_pb);
649  if (seg->avf) {
650  if (seg->is_nullctx)
651  close_null_ctxp(&seg->avf->pb);
652  else
653  ff_format_io_close(s, &seg->avf->pb);
655  seg->avf = NULL;
656  }
657  av_freep(&seg->times);
658  av_freep(&seg->frames);
659  av_freep(&seg->cur_entry.filename);
660 
661  cur = seg->segment_list_entries;
662  while (cur) {
663  SegmentListEntry *next = cur->next;
664  av_freep(&cur->filename);
665  av_free(cur);
666  cur = next;
667  }
668 }
669 
671 {
672  SegmentContext *seg = s->priv_data;
673  AVFormatContext *oc = seg->avf;
675  int ret;
676  int i;
677 
678  seg->segment_count = 0;
679  if (!seg->write_header_trailer)
680  seg->individual_header_trailer = 0;
681 
682  if (seg->header_filename) {
683  seg->write_header_trailer = 1;
684  seg->individual_header_trailer = 0;
685  }
686 
687  if (seg->initial_offset > 0) {
688  av_log(s, AV_LOG_WARNING, "NOTE: the option initial_offset is deprecated,"
689  "you can use output_ts_offset instead of it\n");
690  }
691 
692  if ((seg->time != 2000000) + !!seg->times_str + !!seg->frames_str > 1) {
694  "segment_time, segment_times, and segment_frames options "
695  "are mutually exclusive, select just one of them\n");
696  return AVERROR(EINVAL);
697  }
698 
699  if (seg->times_str) {
700  if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0)
701  return ret;
702  } else if (seg->frames_str) {
703  if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0)
704  return ret;
705  } else {
706  if (seg->use_clocktime) {
707  if (seg->time <= 0) {
708  av_log(s, AV_LOG_ERROR, "Invalid negative segment_time with segment_atclocktime option set\n");
709  return AVERROR(EINVAL);
710  }
711  seg->clocktime_offset = seg->time - (seg->clocktime_offset % seg->time);
712  }
713  }
714 
715  if (seg->list) {
716  if (seg->list_type == LIST_TYPE_UNDEFINED) {
717  if (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV;
718  else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT;
719  else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8;
720  else if (av_match_ext(seg->list, "ffcat,ffconcat")) seg->list_type = LIST_TYPE_FFCONCAT;
721  else seg->list_type = LIST_TYPE_FLAT;
722  }
723  if (!seg->list_size && seg->list_type != LIST_TYPE_M3U8) {
724  if ((ret = segment_list_open(s)) < 0)
725  return ret;
726  } else {
727  const char *proto = avio_find_protocol_name(seg->list);
728  seg->use_rename = proto && !strcmp(proto, "file");
729  }
730  }
731 
732  if (seg->list_type == LIST_TYPE_EXT)
733  av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n");
734 
735  if ((ret = select_reference_stream(s)) < 0)
736  return ret;
737  av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n",
739  av_get_media_type_string(s->streams[seg->reference_stream_index]->codecpar->codec_type));
740 
741  seg->oformat = av_guess_format(seg->format, s->url, NULL);
742 
743  if (!seg->oformat)
745  if (seg->oformat->flags & AVFMT_NOFILE) {
746  av_log(s, AV_LOG_ERROR, "format %s not supported.\n",
747  seg->oformat->name);
748  return AVERROR(EINVAL);
749  }
750 
751  if ((ret = segment_mux_init(s)) < 0)
752  return ret;
753 
754  if ((ret = set_segment_filename(s)) < 0)
755  return ret;
756  oc = seg->avf;
757 
758  if (seg->write_header_trailer) {
759  if ((ret = s->io_open(s, &oc->pb,
760  seg->header_filename ? seg->header_filename : oc->url,
761  AVIO_FLAG_WRITE, NULL)) < 0) {
762  av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->url);
763  return ret;
764  }
765  if (!seg->individual_header_trailer)
766  oc->pb->seekable = 0;
767  } else {
768  if ((ret = open_null_ctx(&oc->pb)) < 0)
769  return ret;
770  seg->is_nullctx = 1;
771  }
772 
774  av_dict_set(&options, "fflags", "-autobsf", 0);
776  if (av_dict_count(options)) {
778  "Some of the provided format options are not recognized\n");
780  return AVERROR(EINVAL);
781  }
783 
784  if (ret < 0) {
785  return ret;
786  }
787  seg->segment_frame_count = 0;
788 
789  av_assert0(s->nb_streams == oc->nb_streams);
792  if (ret < 0)
793  return ret;
794  seg->header_written = 1;
795  }
796 
797  for (i = 0; i < s->nb_streams; i++) {
798  AVStream *inner_st = oc->streams[i];
799  AVStream *outer_st = s->streams[i];
800  avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
801  }
802 
803  if (oc->avoid_negative_ts > 0 && s->avoid_negative_ts < 0)
804  s->avoid_negative_ts = 1;
805 
806  return ret;
807 }
808 
810 {
811  SegmentContext *seg = s->priv_data;
812  AVFormatContext *oc = seg->avf;
813  int ret;
814 
815  if (!seg->header_written) {
817  if (ret < 0)
818  return ret;
819  }
820 
821  if (!seg->write_header_trailer || seg->header_filename) {
822  if (seg->header_filename) {
823  av_write_frame(oc, NULL);
824  ff_format_io_close(oc, &oc->pb);
825  } else {
826  close_null_ctxp(&oc->pb);
827  seg->is_nullctx = 0;
828  }
829  if ((ret = oc->io_open(oc, &oc->pb, oc->url, AVIO_FLAG_WRITE, NULL)) < 0)
830  return ret;
831  if (!seg->individual_header_trailer)
832  oc->pb->seekable = 0;
833  }
834 
835  return 0;
836 }
837 
839 {
840  SegmentContext *seg = s->priv_data;
841  AVStream *st = s->streams[pkt->stream_index];
842  int64_t end_pts = INT64_MAX, offset;
843  int start_frame = INT_MAX;
844  int ret;
845  struct tm ti;
846  int64_t usecs;
847  int64_t wrapped_val;
848 
849  if (!seg->avf || !seg->avf->pb)
850  return AVERROR(EINVAL);
851 
852  if (!st->codecpar->extradata_size) {
853  size_t pkt_extradata_size;
854  uint8_t *pkt_extradata = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &pkt_extradata_size);
855  if (pkt_extradata && pkt_extradata_size > 0) {
856  ret = ff_alloc_extradata(st->codecpar, pkt_extradata_size);
857  if (ret < 0) {
858  av_log(s, AV_LOG_WARNING, "Unable to add extradata to stream. Output segments may be invalid.\n");
859  goto calc_times;
860  }
861  memcpy(st->codecpar->extradata, pkt_extradata, pkt_extradata_size);
862  }
863  }
864 
865 calc_times:
866  if (seg->times) {
867  end_pts = seg->segment_count < seg->nb_times ?
868  seg->times[seg->segment_count] : INT64_MAX;
869  } else if (seg->frames) {
870  start_frame = seg->segment_count < seg->nb_frames ?
871  seg->frames[seg->segment_count] : INT_MAX;
872  } else {
873  if (seg->use_clocktime) {
874  int64_t avgt = av_gettime();
875  time_t sec = avgt / 1000000;
876  localtime_r(&sec, &ti);
877  usecs = (int64_t)(ti.tm_hour * 3600 + ti.tm_min * 60 + ti.tm_sec) * 1000000 + (avgt % 1000000);
878  wrapped_val = (usecs + seg->clocktime_offset) % seg->time;
879  if (wrapped_val < seg->last_val && wrapped_val < seg->clocktime_wrap_duration)
880  seg->cut_pending = 1;
881  seg->last_val = wrapped_val;
882  } else {
883  end_pts = seg->time * (seg->segment_count + 1);
884  }
885  }
886 
887  ff_dlog(s, "packet stream:%d pts:%s pts_time:%s duration_time:%s is_key:%d frame:%d\n",
891  pkt->stream_index == seg->reference_stream_index ? seg->frame_count : -1);
892 
893  if (pkt->stream_index == seg->reference_stream_index &&
895  (seg->segment_frame_count > 0 || seg->write_empty) &&
896  (seg->cut_pending || seg->frame_count >= start_frame ||
897  (pkt->pts != AV_NOPTS_VALUE &&
899  end_pts - seg->time_delta, AV_TIME_BASE_Q) >= 0))) {
900  /* sanitize end time in case last packet didn't have a defined duration */
901  if (seg->cur_entry.last_duration == 0)
902  seg->cur_entry.end_time = (double)pkt->pts * av_q2d(st->time_base);
903 
904  if ((ret = segment_end(s, seg->individual_header_trailer, 0)) < 0)
905  goto fail;
906 
907  if ((ret = segment_start(s, seg->individual_header_trailer)) < 0)
908  goto fail;
909 
910  seg->cut_pending = 0;
912  seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base);
915 
916  if (seg->times || (!seg->frames && !seg->use_clocktime) && seg->write_empty)
917  goto calc_times;
918  }
919 
920  if (pkt->stream_index == seg->reference_stream_index) {
921  if (pkt->pts != AV_NOPTS_VALUE)
922  seg->cur_entry.end_time =
923  FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base));
925  }
926 
927  if (seg->segment_frame_count == 0) {
928  av_log(s, AV_LOG_VERBOSE, "segment:'%s' starts with packet stream:%d pts:%s pts_time:%s frame:%d\n",
929  seg->avf->url, pkt->stream_index,
931  }
932 
933  av_log(s, AV_LOG_DEBUG, "stream:%d start_pts_time:%s pts:%s pts_time:%s dts:%s dts_time:%s",
934  pkt->stream_index,
938 
939  /* compute new timestamps */
942  if (pkt->pts != AV_NOPTS_VALUE)
943  pkt->pts += offset;
944  if (pkt->dts != AV_NOPTS_VALUE)
945  pkt->dts += offset;
946 
947  av_log(s, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
950 
953 
954 fail:
955  /* Use st->index here as the packet returned from ff_write_chained()
956  * is blank if interleaving has been used. */
957  if (st->index == seg->reference_stream_index) {
958  seg->frame_count++;
959  seg->segment_frame_count++;
960  }
961 
962  return ret;
963 }
964 
966 {
967  SegmentContext *seg = s->priv_data;
968  AVFormatContext *oc = seg->avf;
969  int ret;
970 
971  if (!oc)
972  return 0;
973 
974  if (!seg->write_header_trailer) {
975  if ((ret = segment_end(s, 0, 1)) < 0)
976  return ret;
977  if ((ret = open_null_ctx(&oc->pb)) < 0)
978  return ret;
979  seg->is_nullctx = 1;
980  ret = av_write_trailer(oc);
981  } else {
982  ret = segment_end(s, 1, 1);
983  }
984  return ret;
985 }
986 
987 static int seg_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
988 {
989  SegmentContext *seg = s->priv_data;
990  AVFormatContext *oc = seg->avf;
991  if (oc->oformat->check_bitstream) {
992  int ret = oc->oformat->check_bitstream(oc, pkt);
993  if (ret == 1) {
994  FFStream *const sti = ffstream( s->streams[pkt->stream_index]);
995  FFStream *const osti = ffstream(oc->streams[pkt->stream_index]);
996  sti->bsfc = osti->bsfc;
997  osti->bsfc = NULL;
998  }
999  return ret;
1000  }
1001  return 1;
1002 }
1003 
1004 #define OFFSET(x) offsetof(SegmentContext, x)
1005 #define E AV_OPT_FLAG_ENCODING_PARAM
1006 static const AVOption options[] = {
1007  { "reference_stream", "set reference stream", OFFSET(reference_stream_specifier), AV_OPT_TYPE_STRING, {.str = "auto"}, 0, 0, E },
1008  { "segment_format", "set container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1009  { "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 },
1010  { "segment_list", "set the segment list filename", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1011  { "segment_header_filename", "write a single file containing the header", OFFSET(header_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1012 
1013  { "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, "list_flags"},
1014  { "cache", "allow list caching", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX, E, "list_flags"},
1015  { "live", "enable live-friendly list generation (useful for HLS)", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_LIVE }, INT_MIN, INT_MAX, E, "list_flags"},
1016 
1017  { "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1018 
1019  { "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, "list_type" },
1020  { "flat", "flat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, E, "list_type" },
1021  { "csv", "csv format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV }, INT_MIN, INT_MAX, E, "list_type" },
1022  { "ext", "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT }, INT_MIN, INT_MAX, E, "list_type" },
1023  { "ffconcat", "ffconcat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FFCONCAT }, INT_MIN, INT_MAX, E, "list_type" },
1024  { "m3u8", "M3U8 format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
1025  { "hls", "Apple HTTP Live Streaming compatible", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
1026 
1027  { "segment_atclocktime", "set segment to be cut at clocktime", OFFSET(use_clocktime), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E},
1028  { "segment_clocktime_offset", "set segment clocktime offset", OFFSET(clocktime_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 86400000000LL, E},
1029  { "segment_clocktime_wrap_duration", "set segment clocktime wrapping duration", OFFSET(clocktime_wrap_duration), AV_OPT_TYPE_DURATION, {.i64 = INT64_MAX}, 0, INT64_MAX, E},
1030  { "segment_time", "set segment duration", OFFSET(time),AV_OPT_TYPE_DURATION, {.i64 = 2000000}, INT64_MIN, INT64_MAX, E },
1031  { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, E },
1032  { "segment_times", "set segment split time points", OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
1033  { "segment_frames", "set segment split frame numbers", OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
1034  { "segment_wrap", "set number after which the index wraps", OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1035  { "segment_list_entry_prefix", "set base url prefix for segments", OFFSET(entry_prefix), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1036  { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1037  { "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 },
1038  { "strftime", "set filename expansion with strftime at segment creation", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1039  { "increment_tc", "increment timecode between each segment", OFFSET(increment_tc), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1040  { "break_non_keyframes", "allow breaking segments on non-keyframes", OFFSET(break_non_keyframes), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1041 
1042  { "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E },
1043  { "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 },
1044  { "reset_timestamps", "reset timestamps at the beginning of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1045  { "initial_offset", "set initial timestamp offset", OFFSET(initial_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E },
1046  { "write_empty_segments", "allow writing empty 'filler' segments", OFFSET(write_empty), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1047  { NULL },
1048 };
1049 
1050 static const AVClass seg_class = {
1051  .class_name = "(stream) segment muxer",
1052  .item_name = av_default_item_name,
1053  .option = options,
1054  .version = LIBAVUTIL_VERSION_INT,
1055 };
1056 
1057 #if CONFIG_SEGMENT_MUXER
1059  .name = "segment",
1060  .long_name = NULL_IF_CONFIG_SMALL("segment"),
1061  .priv_data_size = sizeof(SegmentContext),
1063  .init = seg_init,
1067  .deinit = seg_free,
1069  .priv_class = &seg_class,
1070 };
1071 #endif
1072 
1073 #if CONFIG_STREAM_SEGMENT_MUXER
1075  .name = "stream_segment,ssegment",
1076  .long_name = NULL_IF_CONFIG_SMALL("streaming segment muxer"),
1077  .priv_data_size = sizeof(SegmentContext),
1078  .flags = AVFMT_NOFILE,
1079  .init = seg_init,
1083  .deinit = seg_free,
1085  .priv_class = &seg_class,
1086 };
1087 #endif
SEGMENT_LIST_FLAG_LIVE
#define SEGMENT_LIST_FLAG_LIVE
Definition: segment.c:67
SegmentContext::write_header_trailer
int write_header_trailer
Set by a private option.
Definition: segment.c:110
SegmentListEntry::index
int index
Definition: segment.c:47
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:186
LIST_TYPE_UNDEFINED
@ LIST_TYPE_UNDEFINED
Definition: segment.c:57
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:86
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
SegmentContext::avf
AVFormatContext * avf
Definition: segment.c:76
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
AVOutputFormat::name
const char * name
Definition: avformat.h:496
AVSTREAM_INIT_IN_WRITE_HEADER
#define AVSTREAM_INIT_IN_WRITE_HEADER
stream parameters initialized in avformat_write_header
Definition: avformat.h:2161
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
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:724
SegmentContext::list_pb
AVIOContext * list_pb
list file put-byte context
Definition: segment.c:93
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:146
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
segment_start
static int segment_start(AVFormatContext *s, int write_header)
Definition: segment.c:230
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:815
av_dict_count
int av_dict_count(const AVDictionary *m)
Get number of entries in dictionary.
Definition: dict.c:35
LIST_TYPE_CSV
@ LIST_TYPE_CSV
Definition: segment.c:59
SegmentContext::use_clocktime
int use_clocktime
flag to cut segments at regular clock time
Definition: segment.c:84
avio_context_free
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:147
AV_TIME_BASE_Q
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
check_bitstream
static int check_bitstream(AVFormatContext *s, FFStream *sti, AVPacket *pkt)
Definition: mux.c:1067
SegmentContext::list_type
int list_type
set the list type
Definition: segment.c:92
SegmentContext::nb_frames
int nb_frames
number of elments in the frames array
Definition: segment.c:104
SegmentContext::segment_idx_wrap
int segment_idx_wrap
number after which the index wraps
Definition: segment.c:72
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1165
segment_mux_init
static int segment_mux_init(AVFormatContext *s)
Definition: segment.c:144
AVOption
AVOption.
Definition: opt.h:247
SegmentContext::segment_count
int segment_count
number of segment files already written
Definition: segment.c:74
SegmentContext::times_str
char * times_str
segment times specification string
Definition: segment.c:98
ff_stream_segment_muxer
const AVOutputFormat ff_stream_segment_muxer
SegmentContext::break_non_keyframes
int break_non_keyframes
Definition: segment.c:117
AV_OPT_TYPE_DURATION
@ AV_OPT_TYPE_DURATION
Definition: opt.h:238
AVOutputFormat::check_bitstream
int(* check_bitstream)(struct AVFormatContext *, const AVPacket *pkt)
Set up any necessary bitstream filtering and extract any extra data needed for the global header.
Definition: avformat.h:616
SegmentContext::frames_str
char * frames_str
segment frame numbers specification string
Definition: segment.c:102
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
float.h
FFStream::bsfc
AVBSFContext * bsfc
bitstream filter to run on stream
Definition: internal.h:205
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:391
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
mathematics.h
AVDictionary
Definition: dict.c:30
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:446
SegmentContext::cur_entry
SegmentListEntry cur_entry
Definition: segment.c:123
seg_check_bitstream
static int seg_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
Definition: segment.c:987
SegmentContext::list
char * list
filename for the segment list file
Definition: segment.c:79
av_get_frame_filename
int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
Definition: utils.c:996
SegmentListEntry::next
struct SegmentListEntry * next
Definition: segment.c:52
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:425
av_basename
const char * av_basename(const char *path)
Thread safe basename.
Definition: avstring.c:260
SegmentContext::time
int64_t time
segment duration
Definition: segment.c:94
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
SegmentContext::use_rename
int use_rename
Definition: segment.c:120
SegmentContext::temp_list_filename
char temp_list_filename[1024]
Definition: segment.c:121
SegmentContext::is_nullctx
int is_nullctx
whether avf->pb is a nullctx
Definition: segment.c:83
segment_end
static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
Definition: segment.c:345
AVFormatContext::interrupt_callback
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1364
ff_segment_muxer
const AVOutputFormat ff_segment_muxer
SegmentListEntry
Definition: segment.c:46
SegmentContext::nb_times
int nb_times
number of elments in the times array
Definition: segment.c:100
parse_frames
static int parse_frames(void *log_ctx, int **frames, int *nb_frames, const char *frames_str)
Definition: segment.c:515
seg_write_header
static int seg_write_header(AVFormatContext *s)
Definition: segment.c:809
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:426
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:335
fail
#define fail()
Definition: checkasm.h:127
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:116
AVTimecode::start
int start
timecode frame start (first base frame number)
Definition: timecode.h:42
av_timecode_make_string
char * av_timecode_make_string(const AVTimecode *tc, char *buf, int framenum)
Load timecode string in buf.
Definition: timecode.c:102
SegmentContext::oformat
const AVOutputFormat * oformat
Definition: segment.c:75
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
ist
fg inputs[0] ist
Definition: ffmpeg_filter.c:182
av_opt_set
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:468
close_null_ctxp
static void close_null_ctxp(AVIOContext **pb)
Definition: segment.c:580
SegmentContext::cut_pending
int cut_pending
Definition: segment.c:88
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:338
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:665
AVRational::num
int num
Numerator.
Definition: rational.h:59
select_reference_stream
static int select_reference_stream(AVFormatContext *s)
Definition: segment.c:586
SegmentContext::use_strftime
int use_strftime
flag to expand filename with strftime
Definition: segment.c:95
avassert.h
SegmentContext::reset_timestamps
int reset_timestamps
reset timestamps at the beginning of each segment
Definition: segment.c:113
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:105
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
AVFormatContext::metadata
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1326
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
SegmentListEntry::offset_pts
int64_t offset_pts
Definition: segment.c:50
SegmentContext::format
char * format
format to use for output segment files
Definition: segment.c:77
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:1306
seg_write_trailer
static int seg_write_trailer(struct AVFormatContext *s)
Definition: segment.c:965
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:40
s
#define s(width, name)
Definition: cbs_vp9.c:257
AVFormatContext::flags
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1215
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:186
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:38
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AVMEDIA_TYPE_NB
@ AVMEDIA_TYPE_NB
Definition: avutil.h:206
AVIO_FLAG_WRITE
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:604
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
ctx
AVFormatContext * ctx
Definition: movenc.c:48
SegmentContext::write_empty
int write_empty
Definition: segment.c:118
SegmentListEntry::last_duration
int64_t last_duration
Definition: segment.c:53
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:141
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:521
AVFormatContext::opaque
void * opaque
User data.
Definition: avformat.h:1602
AVMEDIA_TYPE_DATA
@ AVMEDIA_TYPE_DATA
Opaque data information usually continuous.
Definition: avutil.h:203
f
#define f(width, name)
Definition: cbs_vp9.c:255
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:467
SegmentListEntry::start_pts
int64_t start_pts
Definition: segment.c:49
time_internal.h
if
if(ret)
Definition: filter_design.txt:179
seg_init
static int seg_init(AVFormatContext *s)
Definition: segment.c:670
avio_flush
void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:238
AVFormatContext
Format I/O context.
Definition: avformat.h:1097
internal.h
SegmentContext::format_options
AVDictionary * format_options
Definition: segment.c:78
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:992
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
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:868
NULL
#define NULL
Definition: coverity.c:32
write_trailer
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:98
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
LIST_TYPE_EXT
@ LIST_TYPE_EXT
deprecated
Definition: segment.c:61
AV_OPT_TYPE_DICT
@ AV_OPT_TYPE_DICT
Definition: opt.h:231
SegmentContext::frames
int * frames
list of frame number specification
Definition: segment.c:103
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1139
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
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:587
time.h
avio_w8
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:196
set_segment_filename
static int set_segment_filename(AVFormatContext *s)
Definition: segment.c:186
AVOutputFormat::priv_class
const AVClass * priv_class
AVClass for the private context.
Definition: avformat.h:524
av_write_frame
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:1187
AV_ESCAPE_MODE_AUTO
@ AV_ESCAPE_MODE_AUTO
Use auto-selected escaping mode.
Definition: avstring.h:324
seg_write_packet
static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: segment.c:838
segment_list_open
static int segment_list_open(AVFormatContext *s)
Definition: segment.c:275
SegmentContext::clocktime_offset
int64_t clocktime_offset
Definition: segment.c:85
OFFSET
#define OFFSET(x)
Definition: segment.c:1004
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
AVFormatContext::nb_streams
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1153
AVOutputFormat::flags
int flags
can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS,...
Definition: avformat.h:515
ff_dlog
#define ff_dlog(a,...)
Definition: tableprint_vlc.h:29
SegmentContext::entry_prefix
char * entry_prefix
prefix to add to list entry filenames
Definition: segment.c:91
LIST_TYPE_FLAT
@ LIST_TYPE_FLAT
Definition: segment.c:58
SegmentContext::increment_tc
int increment_tc
flag to increment timecode if found
Definition: segment.c:96
print_csv_escaped_str
static void print_csv_escaped_str(AVIOContext *ctx, const char *str)
Definition: segment.c:128
SegmentContext::segment_list_entries_end
SegmentListEntry * segment_list_entries_end
Definition: segment.c:125
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
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:76
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: utils.c:1492
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:117
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:262
FFStream
Definition: internal.h:188
localtime_r
#define localtime_r
Definition: time_internal.h:46
SegmentContext::time_delta
int64_t time_delta
Definition: segment.c:108
AVFormatContext::url
char * url
input or output URL.
Definition: avformat.h:1180
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:185
SegmentContext
Definition: f_segment.c:35
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:643
AVFMT_NOFILE
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:463
LIST_TYPE_NB
@ LIST_TYPE_NB
Definition: segment.c:63
SegmentContext::header_written
int header_written
whether we've already called avformat_write_header
Definition: segment.c:89
ListType
ListType
Definition: segment.c:56
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:372
SegmentContext::segment_frame_count
int segment_frame_count
number of reference frames in the segment
Definition: segment.c:106
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:379
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:203
LIST_TYPE_M3U8
@ LIST_TYPE_M3U8
Definition: segment.c:60
SegmentContext::segment_idx_wrap_nb
int segment_idx_wrap_nb
number of time the index has wraped
Definition: segment.c:73
SegmentListEntry::end_time
double end_time
Definition: segment.c:48
SegmentContext::last_val
int64_t last_val
remember last time for wrap around detection
Definition: segment.c:87
write_packet
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:731
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:1251
SegmentContext::segment_idx
int segment_idx
index of the segment file to write, starting from 0
Definition: segment.c:71
SegmentContext::reference_stream_specifier
char * reference_stream_specifier
reference stream specifier
Definition: segment.c:115
i
int i
Definition: input.c:406
log.h
AVFMT_GLOBALHEADER
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:466
AVOutputFormat
Definition: avformat.h:495
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:366
avio_internal.h
SegmentListEntry::start_time
double start_time
Definition: segment.c:48
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: avpacket.c:246
internal.h
AVERROR_MUXER_NOT_FOUND
#define AVERROR_MUXER_NOT_FOUND
Muxer not found.
Definition: error.h:62
AVOutputFormat::interleave_packet
int(* interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush)
A format-specific function for interleavement.
Definition: avformat.h:557
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
AVFormatContext::avoid_negative_ts
int avoid_negative_ts
Avoid negative timestamps during muxing.
Definition: avformat.h:1429
AVMEDIA_TYPE_ATTACHMENT
@ AVMEDIA_TYPE_ATTACHMENT
Opaque data information usually sparse.
Definition: avutil.h:205
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, 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:130
AVFormatContext::max_delay
int max_delay
Definition: avformat.h:1209
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:263
SegmentContext::list_size
int list_size
number of entries for the segment list file
Definition: segment.c:81
SegmentContext::segment_list_entries
SegmentListEntry * segment_list_entries
Definition: segment.c:124
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:845
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:71
AVFormatContext::oformat
const struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1116
avformat.h
E
#define E
Definition: segment.c:1005
ff_format_set_url
void ff_format_set_url(AVFormatContext *s, char *url)
Set AVFormatContext url field to the provided pointer.
Definition: utils.c:1947
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:76
AVStream::index
int index
stream index in AVFormatContext
Definition: avformat.h:846
ff_stream_encode_params_copy
int ff_stream_encode_params_copy(AVStream *dst, const AVStream *src)
Copy encoding parameters from source to destination stream.
Definition: utils.c:586
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:55
AVRational::den
int den
Denominator.
Definition: rational.h:60
options
static const AVOption options[]
Definition: segment.c:1006
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:224
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:310
avformat_free_context
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:679
SegmentContext::header_filename
char * header_filename
filename to write the output header to
Definition: segment.c:111
AVFormatContext::io_close
void(* io_close)(struct AVFormatContext *s, AVIOContext *pb)
A callback for closing the streams opened with AVFormatContext.io_open().
Definition: avformat.h:1662
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:1656
SegmentContext::individual_header_trailer
int individual_header_trailer
Set by a private option.
Definition: segment.c:109
SegmentContext::list_flags
int list_flags
flags affecting list generation
Definition: segment.c:80
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: utils.c:1146
AVPacket::stream_index
int stream_index
Definition: packet.h:375
seg_class
static const AVClass seg_class
Definition: segment.c:1050
SegmentContext::times
int64_t * times
list of segment interval specification
Definition: segment.c:99
av_gettime
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
ff_format_io_close
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:1798
tc
#define tc
Definition: regdef.h:69
av_strdup
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:279
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:51
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
AVDictionaryEntry
Definition: dict.h:79
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVPacket
This structure stores compressed data.
Definition: packet.h:350
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:241
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
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:70
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:217
SEGMENT_LIST_FLAG_CACHE
#define SEGMENT_LIST_FLAG_CACHE
Definition: segment.c:66
format
fg outputs[0] format
Definition: ffmpeg_filter.c:175
parse_times
static int parse_times(void *log_ctx, int64_t **times, int *nb_times, const char *times_str)
Definition: segment.c:457
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:467
AV_OPT_TYPE_FLAGS
@ AV_OPT_TYPE_FLAGS
Definition: opt.h:223
convert_header.str
string str
Definition: convert_header.py:20
timestamp.h
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
SegmentContext::initial_offset
int64_t initial_offset
initial timestamps offset, expressed in microseconds
Definition: segment.c:114
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:250
AVDictionaryEntry::value
char * value
Definition: dict.h:81
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:228
write_header
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:347
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:136
AVStream::pts_wrap_bits
int pts_wrap_bits
Number of bits in timestamps.
Definition: avformat.h:1001
int
int
Definition: ffmpeg_filter.c:156
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:233
snprintf
#define snprintf
Definition: snprintf.h:34
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1125
open_null_ctx
static int open_null_ctx(AVIOContext **ctx)
Definition: segment.c:566
LIST_TYPE_FFCONCAT
@ LIST_TYPE_FFCONCAT
Definition: segment.c:62
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:451
SegmentListEntry::filename
char * filename
Definition: segment.c:51