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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 /* #define DEBUG */
28 
29 #include <float.h>
30 #include <time.h>
31 
32 #include "avformat.h"
33 #include "avio_internal.h"
34 #include "internal.h"
35 
36 #include "libavutil/avassert.h"
37 #include "libavutil/internal.h"
38 #include "libavutil/log.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;
51  int64_t start_pts;
52  int64_t offset_pts;
53  char *filename;
55  int64_t last_duration;
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
80  char *format_options_str; ///< format options to use for output segment files
82  char *list; ///< filename for the segment list file
83  int list_flags; ///< flags affecting list generation
84  int list_size; ///< number of entries for the segment list file
85 
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  char *time_str; ///< segment duration specification string
97  int64_t time; ///< 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 
111  int64_t time_delta;
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 begin of each segment
117  int64_t initial_offset; ///< initial timestamps offset, expressed in microseconds
118  char *reference_stream_specifier; ///< reference stream specifier
122 
124  char temp_list_filename[1024];
125 
130 
131 static void print_csv_escaped_str(AVIOContext *ctx, const char *str)
132 {
133  int needs_quoting = !!str[strcspn(str, "\",\n\r")];
134 
135  if (needs_quoting)
136  avio_w8(ctx, '"');
137 
138  for (; *str; str++) {
139  if (*str == '"')
140  avio_w8(ctx, '"');
141  avio_w8(ctx, *str);
142  }
143  if (needs_quoting)
144  avio_w8(ctx, '"');
145 }
146 
148 {
149  SegmentContext *seg = s->priv_data;
150  AVFormatContext *oc;
151  int i;
152  int ret;
153 
154  ret = avformat_alloc_output_context2(&seg->avf, seg->oformat, NULL, NULL);
155  if (ret < 0)
156  return ret;
157  oc = seg->avf;
158 
160  oc->max_delay = s->max_delay;
161  av_dict_copy(&oc->metadata, s->metadata, 0);
162  oc->opaque = s->opaque;
163  oc->io_close = s->io_close;
164  oc->io_open = s->io_open;
165  oc->flags = s->flags;
166 
167  for (i = 0; i < s->nb_streams; i++) {
168  AVStream *st;
169  AVCodecParameters *ipar, *opar;
170 
171  if (!(st = avformat_new_stream(oc, NULL)))
172  return AVERROR(ENOMEM);
173  ipar = s->streams[i]->codecpar;
174  opar = st->codecpar;
175  avcodec_parameters_copy(opar, ipar);
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  }
184  st->time_base = s->streams[i]->time_base;
185  av_dict_copy(&st->metadata, s->streams[i]->metadata, 0);
186  }
187 
188  return 0;
189 }
190 
192 {
193  SegmentContext *seg = s->priv_data;
194  AVFormatContext *oc = seg->avf;
195  size_t size;
196  int ret;
197 
198  if (seg->segment_idx_wrap)
199  seg->segment_idx %= seg->segment_idx_wrap;
200  if (seg->use_strftime) {
201  time_t now0;
202  struct tm *tm, tmpbuf;
203  time(&now0);
204  tm = localtime_r(&now0, &tmpbuf);
205  if (!strftime(oc->filename, sizeof(oc->filename), s->filename, tm)) {
206  av_log(oc, AV_LOG_ERROR, "Could not get segment filename with strftime\n");
207  return AVERROR(EINVAL);
208  }
209  } else if (av_get_frame_filename(oc->filename, sizeof(oc->filename),
210  s->filename, seg->segment_idx) < 0) {
211  av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", s->filename);
212  return AVERROR(EINVAL);
213  }
214 
215  /* copy modified name in list entry */
216  size = strlen(av_basename(oc->filename)) + 1;
217  if (seg->entry_prefix)
218  size += strlen(seg->entry_prefix);
219 
220  if ((ret = av_reallocp(&seg->cur_entry.filename, size)) < 0)
221  return ret;
222  snprintf(seg->cur_entry.filename, size, "%s%s",
223  seg->entry_prefix ? seg->entry_prefix : "",
224  av_basename(oc->filename));
225 
226  return 0;
227 }
228 
230 {
231  SegmentContext *seg = s->priv_data;
232  AVFormatContext *oc = seg->avf;
233  int err = 0;
234 
235  if (write_header) {
237  seg->avf = NULL;
238  if ((err = segment_mux_init(s)) < 0)
239  return err;
240  oc = seg->avf;
241  }
242 
243  seg->segment_idx++;
244  if ((seg->segment_idx_wrap) && (seg->segment_idx % seg->segment_idx_wrap == 0))
245  seg->segment_idx_wrap_nb++;
246 
247  if ((err = set_segment_filename(s)) < 0)
248  return err;
249 
250  if ((err = s->io_open(s, &oc->pb, oc->filename, AVIO_FLAG_WRITE, NULL)) < 0) {
251  av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->filename);
252  return err;
253  }
254  if (!seg->individual_header_trailer)
255  oc->pb->seekable = 0;
256 
257  if (oc->oformat->priv_class && oc->priv_data)
258  av_opt_set(oc->priv_data, "mpegts_flags", "+resend_headers", 0);
259 
260  if (write_header) {
262  av_dict_copy(&options, seg->format_options, 0);
263  av_dict_set(&options, "fflags", "-autobsf", 0);
264  err = avformat_write_header(oc, &options);
265  av_dict_free(&options);
266  if (err < 0)
267  return err;
268  }
269 
270  seg->segment_frame_count = 0;
271  return 0;
272 }
273 
275 {
276  SegmentContext *seg = s->priv_data;
277  int ret;
278 
279  snprintf(seg->temp_list_filename, sizeof(seg->temp_list_filename), seg->use_rename ? "%s.tmp" : "%s", seg->list);
280  ret = s->io_open(s, &seg->list_pb, seg->temp_list_filename, AVIO_FLAG_WRITE, NULL);
281  if (ret < 0) {
282  av_log(s, AV_LOG_ERROR, "Failed to open segment list '%s'\n", seg->list);
283  return ret;
284  }
285 
286  if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) {
287  SegmentListEntry *entry;
288  double max_duration = 0;
289 
290  avio_printf(seg->list_pb, "#EXTM3U\n");
291  avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n");
292  avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index);
293  avio_printf(seg->list_pb, "#EXT-X-ALLOW-CACHE:%s\n",
294  seg->list_flags & SEGMENT_LIST_FLAG_CACHE ? "YES" : "NO");
295 
296  av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%d\n",
298 
299  for (entry = seg->segment_list_entries; entry; entry = entry->next)
300  max_duration = FFMAX(max_duration, entry->end_time - entry->start_time);
301  avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration));
302  } else if (seg->list_type == LIST_TYPE_FFCONCAT) {
303  avio_printf(seg->list_pb, "ffconcat version 1.0\n");
304  }
305 
306  return ret;
307 }
308 
309 static void segment_list_print_entry(AVIOContext *list_ioctx,
310  ListType list_type,
311  const SegmentListEntry *list_entry,
312  void *log_ctx)
313 {
314  switch (list_type) {
315  case LIST_TYPE_FLAT:
316  avio_printf(list_ioctx, "%s\n", list_entry->filename);
317  break;
318  case LIST_TYPE_CSV:
319  case LIST_TYPE_EXT:
320  print_csv_escaped_str(list_ioctx, list_entry->filename);
321  avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time);
322  break;
323  case LIST_TYPE_M3U8:
324  avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n",
325  list_entry->end_time - list_entry->start_time, list_entry->filename);
326  break;
327  case LIST_TYPE_FFCONCAT:
328  {
329  char *buf;
330  if (av_escape(&buf, list_entry->filename, NULL, AV_ESCAPE_MODE_AUTO, AV_ESCAPE_FLAG_WHITESPACE) < 0) {
331  av_log(log_ctx, AV_LOG_WARNING,
332  "Error writing list entry '%s' in list file\n", list_entry->filename);
333  return;
334  }
335  avio_printf(list_ioctx, "file %s\n", buf);
336  av_free(buf);
337  break;
338  }
339  default:
340  av_assert0(!"Invalid list type");
341  }
342 }
343 
344 static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
345 {
346  SegmentContext *seg = s->priv_data;
347  AVFormatContext *oc = seg->avf;
348  int ret = 0;
349  AVTimecode tc;
350  AVRational rate;
351  AVDictionaryEntry *tcr;
353  int i;
354  int err;
355 
356  if (!oc || !oc->pb)
357  return AVERROR(EINVAL);
358 
359  av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */
360  if (write_trailer)
361  ret = av_write_trailer(oc);
362 
363  if (ret < 0)
364  av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n",
365  oc->filename);
366 
367  if (seg->list) {
368  if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) {
369  SegmentListEntry *entry = av_mallocz(sizeof(*entry));
370  if (!entry) {
371  ret = AVERROR(ENOMEM);
372  goto end;
373  }
374 
375  /* append new element */
376  memcpy(entry, &seg->cur_entry, sizeof(*entry));
377  entry->filename = av_strdup(entry->filename);
378  if (!seg->segment_list_entries)
380  else
381  seg->segment_list_entries_end->next = entry;
382  seg->segment_list_entries_end = entry;
383 
384  /* drop first item */
385  if (seg->list_size && seg->segment_count >= seg->list_size) {
386  entry = seg->segment_list_entries;
388  av_freep(&entry->filename);
389  av_freep(&entry);
390  }
391 
392  if ((ret = segment_list_open(s)) < 0)
393  goto end;
394  for (entry = seg->segment_list_entries; entry; entry = entry->next)
395  segment_list_print_entry(seg->list_pb, seg->list_type, entry, s);
396  if (seg->list_type == LIST_TYPE_M3U8 && is_last)
397  avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n");
398  ff_format_io_close(s, &seg->list_pb);
399  if (seg->use_rename)
400  ff_rename(seg->temp_list_filename, seg->list, s);
401  } else {
402  segment_list_print_entry(seg->list_pb, seg->list_type, &seg->cur_entry, s);
403  avio_flush(seg->list_pb);
404  }
405  }
406 
407  av_log(s, AV_LOG_VERBOSE, "segment:'%s' count:%d ended\n",
408  seg->avf->filename, seg->segment_count);
409  seg->segment_count++;
410 
411  if (seg->increment_tc) {
412  tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
413  if (tcr) {
414  /* search the first video stream */
415  for (i = 0; i < s->nb_streams; i++) {
417  rate = s->streams[i]->avg_frame_rate;/* Get fps from the video stream */
418  err = av_timecode_init_from_string(&tc, rate, tcr->value, s);
419  if (err < 0) {
420  av_log(s, AV_LOG_WARNING, "Could not increment timecode, error occurred during timecode creation.");
421  break;
422  }
423  tc.start += (int)((seg->cur_entry.end_time - seg->cur_entry.start_time) * av_q2d(rate));/* increment timecode */
424  av_dict_set(&s->metadata, "timecode",
425  av_timecode_make_string(&tc, buf, 0), 0);
426  break;
427  }
428  }
429  } else {
430  av_log(s, AV_LOG_WARNING, "Could not increment timecode, no timecode metadata found");
431  }
432  }
433 
434 end:
435  ff_format_io_close(oc, &oc->pb);
436 
437  return ret;
438 }
439 
440 static int parse_times(void *log_ctx, int64_t **times, int *nb_times,
441  const char *times_str)
442 {
443  char *p;
444  int i, ret = 0;
445  char *times_str1 = av_strdup(times_str);
446  char *saveptr = NULL;
447 
448  if (!times_str1)
449  return AVERROR(ENOMEM);
450 
451 #define FAIL(err) ret = err; goto end
452 
453  *nb_times = 1;
454  for (p = times_str1; *p; p++)
455  if (*p == ',')
456  (*nb_times)++;
457 
458  *times = av_malloc_array(*nb_times, sizeof(**times));
459  if (!*times) {
460  av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n");
461  FAIL(AVERROR(ENOMEM));
462  }
463 
464  p = times_str1;
465  for (i = 0; i < *nb_times; i++) {
466  int64_t t;
467  char *tstr = av_strtok(p, ",", &saveptr);
468  p = NULL;
469 
470  if (!tstr || !tstr[0]) {
471  av_log(log_ctx, AV_LOG_ERROR, "Empty time specification in times list %s\n",
472  times_str);
473  FAIL(AVERROR(EINVAL));
474  }
475 
476  ret = av_parse_time(&t, tstr, 1);
477  if (ret < 0) {
478  av_log(log_ctx, AV_LOG_ERROR,
479  "Invalid time duration specification '%s' in times list %s\n", tstr, times_str);
480  FAIL(AVERROR(EINVAL));
481  }
482  (*times)[i] = t;
483 
484  /* check on monotonicity */
485  if (i && (*times)[i-1] > (*times)[i]) {
486  av_log(log_ctx, AV_LOG_ERROR,
487  "Specified time %f is greater than the following time %f\n",
488  (float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000);
489  FAIL(AVERROR(EINVAL));
490  }
491  }
492 
493 end:
494  av_free(times_str1);
495  return ret;
496 }
497 
498 static int parse_frames(void *log_ctx, int **frames, int *nb_frames,
499  const char *frames_str)
500 {
501  char *p;
502  int i, ret = 0;
503  char *frames_str1 = av_strdup(frames_str);
504  char *saveptr = NULL;
505 
506  if (!frames_str1)
507  return AVERROR(ENOMEM);
508 
509 #define FAIL(err) ret = err; goto end
510 
511  *nb_frames = 1;
512  for (p = frames_str1; *p; p++)
513  if (*p == ',')
514  (*nb_frames)++;
515 
516  *frames = av_malloc_array(*nb_frames, sizeof(**frames));
517  if (!*frames) {
518  av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced frames array\n");
519  FAIL(AVERROR(ENOMEM));
520  }
521 
522  p = frames_str1;
523  for (i = 0; i < *nb_frames; i++) {
524  long int f;
525  char *tailptr;
526  char *fstr = av_strtok(p, ",", &saveptr);
527 
528  p = NULL;
529  if (!fstr) {
530  av_log(log_ctx, AV_LOG_ERROR, "Empty frame specification in frame list %s\n",
531  frames_str);
532  FAIL(AVERROR(EINVAL));
533  }
534  f = strtol(fstr, &tailptr, 10);
535  if (*tailptr || f <= 0 || f >= INT_MAX) {
536  av_log(log_ctx, AV_LOG_ERROR,
537  "Invalid argument '%s', must be a positive integer <= INT64_MAX\n",
538  fstr);
539  FAIL(AVERROR(EINVAL));
540  }
541  (*frames)[i] = f;
542 
543  /* check on monotonicity */
544  if (i && (*frames)[i-1] > (*frames)[i]) {
545  av_log(log_ctx, AV_LOG_ERROR,
546  "Specified frame %d is greater than the following frame %d\n",
547  (*frames)[i], (*frames)[i-1]);
548  FAIL(AVERROR(EINVAL));
549  }
550  }
551 
552 end:
553  av_free(frames_str1);
554  return ret;
555 }
556 
558 {
559  int buf_size = 32768;
560  uint8_t *buf = av_malloc(buf_size);
561  if (!buf)
562  return AVERROR(ENOMEM);
563  *ctx = avio_alloc_context(buf, buf_size, AVIO_FLAG_WRITE, NULL, NULL, NULL, NULL);
564  if (!*ctx) {
565  av_free(buf);
566  return AVERROR(ENOMEM);
567  }
568  return 0;
569 }
570 
571 static void close_null_ctxp(AVIOContext **pb)
572 {
573  av_freep(&(*pb)->buffer);
574  av_freep(pb);
575 }
576 
578 {
579  SegmentContext *seg = s->priv_data;
580  int ret, i;
581 
582  seg->reference_stream_index = -1;
583  if (!strcmp(seg->reference_stream_specifier, "auto")) {
584  /* select first index of type with highest priority */
585  int type_index_map[AVMEDIA_TYPE_NB];
586  static const enum AVMediaType type_priority_list[] = {
592  };
593  enum AVMediaType type;
594 
595  for (i = 0; i < AVMEDIA_TYPE_NB; i++)
596  type_index_map[i] = -1;
597 
598  /* select first index for each type */
599  for (i = 0; i < s->nb_streams; i++) {
600  type = s->streams[i]->codecpar->codec_type;
601  if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1
602  /* ignore attached pictures/cover art streams */
604  type_index_map[type] = i;
605  }
606 
607  for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) {
608  type = type_priority_list[i];
609  if ((seg->reference_stream_index = type_index_map[type]) >= 0)
610  break;
611  }
612  } else {
613  for (i = 0; i < s->nb_streams; i++) {
616  if (ret < 0)
617  return ret;
618  if (ret > 0) {
619  seg->reference_stream_index = i;
620  break;
621  }
622  }
623  }
624 
625  if (seg->reference_stream_index < 0) {
626  av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n",
628  return AVERROR(EINVAL);
629  }
630 
631  return 0;
632 }
633 
635 {
636  SegmentContext *seg = s->priv_data;
637  ff_format_io_close(seg->avf, &seg->list_pb);
639  seg->avf = NULL;
640 }
641 
643 {
644  SegmentContext *seg = s->priv_data;
645  AVFormatContext *oc = seg->avf;
647  int ret;
648  int i;
649 
650  seg->segment_count = 0;
651  if (!seg->write_header_trailer)
652  seg->individual_header_trailer = 0;
653 
654  if (seg->header_filename) {
655  seg->write_header_trailer = 1;
656  seg->individual_header_trailer = 0;
657  }
658 
659  if (seg->initial_offset > 0) {
660  av_log(s, AV_LOG_WARNING, "NOTE: the option initial_offset is deprecated,"
661  "you can use output_ts_offset instead of it\n");
662  }
663 
664  if (!!seg->time_str + !!seg->times_str + !!seg->frames_str > 1) {
665  av_log(s, AV_LOG_ERROR,
666  "segment_time, segment_times, and segment_frames options "
667  "are mutually exclusive, select just one of them\n");
668  return AVERROR(EINVAL);
669  }
670 
671  if (seg->times_str) {
672  if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0)
673  return ret;
674  } else if (seg->frames_str) {
675  if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0)
676  return ret;
677  } else {
678  /* set default value if not specified */
679  if (!seg->time_str)
680  seg->time_str = av_strdup("2");
681  if ((ret = av_parse_time(&seg->time, seg->time_str, 1)) < 0) {
682  av_log(s, AV_LOG_ERROR,
683  "Invalid time duration specification '%s' for segment_time option\n",
684  seg->time_str);
685  return ret;
686  }
687  if (seg->use_clocktime) {
688  if (seg->time <= 0) {
689  av_log(s, AV_LOG_ERROR, "Invalid negative segment_time with segment_atclocktime option set\n");
690  return AVERROR(EINVAL);
691  }
692  seg->clocktime_offset = seg->time - (seg->clocktime_offset % seg->time);
693  }
694  }
695 
696  if (seg->format_options_str) {
697  ret = av_dict_parse_string(&seg->format_options, seg->format_options_str, "=", ":", 0);
698  if (ret < 0) {
699  av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n",
700  seg->format_options_str);
701  return ret;
702  }
703  }
704 
705  if (seg->list) {
706  if (seg->list_type == LIST_TYPE_UNDEFINED) {
707  if (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV;
708  else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT;
709  else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8;
710  else if (av_match_ext(seg->list, "ffcat,ffconcat")) seg->list_type = LIST_TYPE_FFCONCAT;
711  else seg->list_type = LIST_TYPE_FLAT;
712  }
713  if (!seg->list_size && seg->list_type != LIST_TYPE_M3U8) {
714  if ((ret = segment_list_open(s)) < 0)
715  return ret;
716  } else {
717  const char *proto = avio_find_protocol_name(seg->list);
718  seg->use_rename = proto && !strcmp(proto, "file");
719  }
720  }
721 
722  if (seg->list_type == LIST_TYPE_EXT)
723  av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n");
724 
725  if ((ret = select_reference_stream(s)) < 0)
726  return ret;
727  av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n",
730 
731  seg->oformat = av_guess_format(seg->format, s->filename, NULL);
732 
733  if (!seg->oformat)
735  if (seg->oformat->flags & AVFMT_NOFILE) {
736  av_log(s, AV_LOG_ERROR, "format %s not supported.\n",
737  seg->oformat->name);
738  return AVERROR(EINVAL);
739  }
740 
741  if ((ret = segment_mux_init(s)) < 0)
742  return ret;
743 
744  if ((ret = set_segment_filename(s)) < 0)
745  return ret;
746  oc = seg->avf;
747 
748  if (seg->write_header_trailer) {
749  if ((ret = s->io_open(s, &oc->pb,
750  seg->header_filename ? seg->header_filename : oc->filename,
751  AVIO_FLAG_WRITE, NULL)) < 0) {
752  av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->filename);
753  return ret;
754  }
755  if (!seg->individual_header_trailer)
756  oc->pb->seekable = 0;
757  } else {
758  if ((ret = open_null_ctx(&oc->pb)) < 0)
759  return ret;
760  }
761 
762  av_dict_copy(&options, seg->format_options, 0);
763  av_dict_set(&options, "fflags", "-autobsf", 0);
764  ret = avformat_init_output(oc, &options);
765  if (av_dict_count(options)) {
766  av_log(s, AV_LOG_ERROR,
767  "Some of the provided format options in '%s' are not recognized\n", seg->format_options_str);
768  av_dict_free(&options);
769  return AVERROR(EINVAL);
770  }
771  av_dict_free(&options);
772 
773  if (ret < 0) {
774  ff_format_io_close(oc, &oc->pb);
775  return ret;
776  }
777  seg->segment_frame_count = 0;
778 
779  av_assert0(s->nb_streams == oc->nb_streams);
780  if (ret == AVSTREAM_INIT_IN_WRITE_HEADER) {
781  ret = avformat_write_header(oc, NULL);
782  if (ret < 0)
783  return ret;
784  seg->header_written = 1;
785  }
786 
787  for (i = 0; i < s->nb_streams; i++) {
788  AVStream *inner_st = oc->streams[i];
789  AVStream *outer_st = s->streams[i];
790  avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
791  }
792 
793  if (oc->avoid_negative_ts > 0 && s->avoid_negative_ts < 0)
794  s->avoid_negative_ts = 1;
795 
796  return ret;
797 }
798 
800 {
801  SegmentContext *seg = s->priv_data;
802  AVFormatContext *oc = seg->avf;
803  int ret, i;
804 
805  if (!seg->header_written) {
806  for (i = 0; i < s->nb_streams; i++) {
807  AVStream *st = oc->streams[i];
808  AVCodecParameters *ipar, *opar;
809 
810  ipar = s->streams[i]->codecpar;
811  opar = oc->streams[i]->codecpar;
812  avcodec_parameters_copy(opar, ipar);
813  if (!oc->oformat->codec_tag ||
814  av_codec_get_id (oc->oformat->codec_tag, ipar->codec_tag) == opar->codec_id ||
815  av_codec_get_tag(oc->oformat->codec_tag, ipar->codec_id) <= 0) {
816  opar->codec_tag = ipar->codec_tag;
817  } else {
818  opar->codec_tag = 0;
819  }
821  st->time_base = s->streams[i]->time_base;
822  }
823  ret = avformat_write_header(oc, NULL);
824  if (ret < 0)
825  return ret;
826  }
827 
828  if (!seg->write_header_trailer || seg->header_filename) {
829  if (seg->header_filename) {
830  av_write_frame(oc, NULL);
831  ff_format_io_close(oc, &oc->pb);
832  } else {
833  close_null_ctxp(&oc->pb);
834  }
835  if ((ret = oc->io_open(oc, &oc->pb, oc->filename, AVIO_FLAG_WRITE, NULL)) < 0)
836  return ret;
837  if (!seg->individual_header_trailer)
838  oc->pb->seekable = 0;
839  }
840 
841  return 0;
842 }
843 
845 {
846  SegmentContext *seg = s->priv_data;
847  AVStream *st = s->streams[pkt->stream_index];
848  int64_t end_pts = INT64_MAX, offset;
849  int start_frame = INT_MAX;
850  int ret;
851  struct tm ti;
852  int64_t usecs;
853  int64_t wrapped_val;
854 
855  if (!seg->avf || !seg->avf->pb)
856  return AVERROR(EINVAL);
857 
858 calc_times:
859  if (seg->times) {
860  end_pts = seg->segment_count < seg->nb_times ?
861  seg->times[seg->segment_count] : INT64_MAX;
862  } else if (seg->frames) {
863  start_frame = seg->segment_count < seg->nb_frames ?
864  seg->frames[seg->segment_count] : INT_MAX;
865  } else {
866  if (seg->use_clocktime) {
867  int64_t avgt = av_gettime();
868  time_t sec = avgt / 1000000;
869  localtime_r(&sec, &ti);
870  usecs = (int64_t)(ti.tm_hour * 3600 + ti.tm_min * 60 + ti.tm_sec) * 1000000 + (avgt % 1000000);
871  wrapped_val = (usecs + seg->clocktime_offset) % seg->time;
872  if (wrapped_val < seg->last_val && wrapped_val < seg->clocktime_wrap_duration)
873  seg->cut_pending = 1;
874  seg->last_val = wrapped_val;
875  } else {
876  end_pts = seg->time * (seg->segment_count + 1);
877  }
878  }
879 
880  ff_dlog(s, "packet stream:%d pts:%s pts_time:%s duration_time:%s is_key:%d frame:%d\n",
881  pkt->stream_index, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
882  av_ts2timestr(pkt->duration, &st->time_base),
883  pkt->flags & AV_PKT_FLAG_KEY,
884  pkt->stream_index == seg->reference_stream_index ? seg->frame_count : -1);
885 
886  if (pkt->stream_index == seg->reference_stream_index &&
887  (pkt->flags & AV_PKT_FLAG_KEY || seg->break_non_keyframes) &&
888  (seg->segment_frame_count > 0 || seg->write_empty) &&
889  (seg->cut_pending || seg->frame_count >= start_frame ||
890  (pkt->pts != AV_NOPTS_VALUE &&
891  av_compare_ts(pkt->pts, st->time_base,
892  end_pts - seg->time_delta, AV_TIME_BASE_Q) >= 0))) {
893  /* sanitize end time in case last packet didn't have a defined duration */
894  if (seg->cur_entry.last_duration == 0)
895  seg->cur_entry.end_time = (double)pkt->pts * av_q2d(st->time_base);
896 
897  if ((ret = segment_end(s, seg->individual_header_trailer, 0)) < 0)
898  goto fail;
899 
900  if ((ret = segment_start(s, seg->individual_header_trailer)) < 0)
901  goto fail;
902 
903  seg->cut_pending = 0;
905  seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base);
908 
909  if (seg->times || (!seg->frames && !seg->use_clocktime) && seg->write_empty)
910  goto calc_times;
911  }
912 
913  if (pkt->stream_index == seg->reference_stream_index) {
914  if (pkt->pts != AV_NOPTS_VALUE)
915  seg->cur_entry.end_time =
916  FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base));
917  seg->cur_entry.last_duration = pkt->duration;
918  }
919 
920  if (seg->segment_frame_count == 0) {
921  av_log(s, AV_LOG_VERBOSE, "segment:'%s' starts with packet stream:%d pts:%s pts_time:%s frame:%d\n",
922  seg->avf->filename, pkt->stream_index,
923  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), seg->frame_count);
924  }
925 
926  av_log(s, AV_LOG_DEBUG, "stream:%d start_pts_time:%s pts:%s pts_time:%s dts:%s dts_time:%s",
927  pkt->stream_index,
929  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
930  av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
931 
932  /* compute new timestamps */
933  offset = av_rescale_q(seg->initial_offset - (seg->reset_timestamps ? seg->cur_entry.start_pts : 0),
935  if (pkt->pts != AV_NOPTS_VALUE)
936  pkt->pts += offset;
937  if (pkt->dts != AV_NOPTS_VALUE)
938  pkt->dts += offset;
939 
940  av_log(s, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
941  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
942  av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
943 
944  ret = ff_write_chained(seg->avf, pkt->stream_index, pkt, s, seg->initial_offset || seg->reset_timestamps);
945 
946 fail:
947  if (pkt->stream_index == seg->reference_stream_index) {
948  seg->frame_count++;
949  seg->segment_frame_count++;
950  }
951 
952  return ret;
953 }
954 
956 {
957  SegmentContext *seg = s->priv_data;
958  AVFormatContext *oc = seg->avf;
959  SegmentListEntry *cur, *next;
960  int ret = 0;
961 
962  if (!oc)
963  goto fail;
964 
965  if (!seg->write_header_trailer) {
966  if ((ret = segment_end(s, 0, 1)) < 0)
967  goto fail;
968  if ((ret = open_null_ctx(&oc->pb)) < 0)
969  goto fail;
970  ret = av_write_trailer(oc);
971  close_null_ctxp(&oc->pb);
972  } else {
973  ret = segment_end(s, 1, 1);
974  }
975 fail:
976  if (seg->list)
977  ff_format_io_close(s, &seg->list_pb);
978 
980  av_opt_free(seg);
981  av_freep(&seg->times);
982  av_freep(&seg->frames);
983  av_freep(&seg->cur_entry.filename);
984 
985  cur = seg->segment_list_entries;
986  while (cur) {
987  next = cur->next;
988  av_freep(&cur->filename);
989  av_free(cur);
990  cur = next;
991  }
992 
994  seg->avf = NULL;
995  return ret;
996 }
997 
998 static int seg_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
999 {
1000  SegmentContext *seg = s->priv_data;
1001  AVFormatContext *oc = seg->avf;
1002  if (oc->oformat->check_bitstream) {
1003  int ret = oc->oformat->check_bitstream(oc, pkt);
1004  if (ret == 1) {
1005  AVStream *st = s->streams[pkt->stream_index];
1006  AVStream *ost = oc->streams[pkt->stream_index];
1007  st->internal->bsfcs = ost->internal->bsfcs;
1008  st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1009  ost->internal->bsfcs = NULL;
1010  ost->internal->nb_bsfcs = 0;
1011  }
1012  return ret;
1013  }
1014  return 1;
1015 }
1016 
1017 #define OFFSET(x) offsetof(SegmentContext, x)
1018 #define E AV_OPT_FLAG_ENCODING_PARAM
1019 static const AVOption options[] = {
1020  { "reference_stream", "set reference stream", OFFSET(reference_stream_specifier), AV_OPT_TYPE_STRING, {.str = "auto"}, CHAR_MIN, CHAR_MAX, E },
1021  { "segment_format", "set container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1022  { "segment_format_options", "set list of options for the container format used for the segments", OFFSET(format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1023  { "segment_list", "set the segment list filename", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1024  { "segment_header_filename", "write a single file containing the header", OFFSET(header_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1025 
1026  { "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"},
1027  { "cache", "allow list caching", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX, E, "list_flags"},
1028  { "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"},
1029 
1030  { "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1031 
1032  { "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" },
1033  { "flat", "flat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, E, "list_type" },
1034  { "csv", "csv format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV }, INT_MIN, INT_MAX, E, "list_type" },
1035  { "ext", "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT }, INT_MIN, INT_MAX, E, "list_type" },
1036  { "ffconcat", "ffconcat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FFCONCAT }, INT_MIN, INT_MAX, E, "list_type" },
1037  { "m3u8", "M3U8 format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
1038  { "hls", "Apple HTTP Live Streaming compatible", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
1039 
1040  { "segment_atclocktime", "set segment to be cut at clocktime", OFFSET(use_clocktime), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E},
1041  { "segment_clocktime_offset", "set segment clocktime offset", OFFSET(clocktime_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 86400000000LL, E},
1042  { "segment_clocktime_wrap_duration", "set segment clocktime wrapping duration", OFFSET(clocktime_wrap_duration), AV_OPT_TYPE_DURATION, {.i64 = INT64_MAX}, 0, INT64_MAX, E},
1043  { "segment_time", "set segment duration", OFFSET(time_str),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1044  { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 0, E },
1045  { "segment_times", "set segment split time points", OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
1046  { "segment_frames", "set segment split frame numbers", OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
1047  { "segment_wrap", "set number after which the index wraps", OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1048  { "segment_list_entry_prefix", "set base url prefix for segments", OFFSET(entry_prefix), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1049  { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1050  { "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 },
1051  { "strftime", "set filename expansion with strftime at segment creation", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1052  { "increment_tc", "increment timecode between each segment", OFFSET(increment_tc), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1053  { "break_non_keyframes", "allow breaking segments on non-keyframes", OFFSET(break_non_keyframes), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1054 
1055  { "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E },
1056  { "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 },
1057  { "reset_timestamps", "reset timestamps at the begin of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1058  { "initial_offset", "set initial timestamp offset", OFFSET(initial_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E },
1059  { "write_empty_segments", "allow writing empty 'filler' segments", OFFSET(write_empty), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1060  { NULL },
1061 };
1062 
1063 static const AVClass seg_class = {
1064  .class_name = "segment muxer",
1065  .item_name = av_default_item_name,
1066  .option = options,
1067  .version = LIBAVUTIL_VERSION_INT,
1068 };
1069 
1071  .name = "segment",
1072  .long_name = NULL_IF_CONFIG_SMALL("segment"),
1073  .priv_data_size = sizeof(SegmentContext),
1075  .init = seg_init,
1079  .deinit = seg_free,
1080  .check_bitstream = seg_check_bitstream,
1081  .priv_class = &seg_class,
1082 };
1083 
1084 static const AVClass sseg_class = {
1085  .class_name = "stream_segment muxer",
1086  .item_name = av_default_item_name,
1087  .option = options,
1088  .version = LIBAVUTIL_VERSION_INT,
1089 };
1090 
1092  .name = "stream_segment,ssegment",
1093  .long_name = NULL_IF_CONFIG_SMALL("streaming segment muxer"),
1094  .priv_data_size = sizeof(SegmentContext),
1095  .flags = AVFMT_NOFILE,
1096  .init = seg_init,
1100  .deinit = seg_free,
1101  .check_bitstream = seg_check_bitstream,
1102  .priv_class = &sseg_class,
1103 };
struct SegmentListEntry * next
Definition: segment.c:54
#define NULL
Definition: coverity.c:32
AVFormatContext * avf
Definition: segment.c:78
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:155
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1605
char * header_filename
filename to write the output header to
Definition: segment.c:114
AVOption.
Definition: opt.h:246
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:929
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
char * entry_prefix
prefix to add to list entry filenames
Definition: segment.c:93
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4607
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
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
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:303
AVDictionary * format_options
Definition: segment.c:81
static int segment_start(AVFormatContext *s, int write_header)
Definition: segment.c:229
int segment_idx_wrap
number after which the index wraps
Definition: segment.c:74
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:1375
#define FAIL(err)
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:4056
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:959
int num
Numerator.
Definition: rational.h:59
int av_dict_count(const AVDictionary *m)
Get number of entries in dictionary.
Definition: dict.c:35
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:649
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:621
#define tc
Definition: regdef.h:69
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:222
static AVPacket pkt
int segment_frame_count
number of reference frames in the segment
Definition: segment.c:109
char * filename
Definition: segment.c:53
This struct describes the properties of an encoded stream.
Definition: avcodec.h:4048
static int parse_frames(void *log_ctx, int **frames, int *nb_frames, const char *frames_str)
Definition: segment.c:498
static int seg_write_header(AVFormatContext *s)
Definition: segment.c:799
static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
Definition: segment.c:344
int list_flags
flags affecting list generation
Definition: segment.c:83
static int segment_mux_init(AVFormatContext *s)
Definition: segment.c:147
Format I/O context.
Definition: avformat.h:1349
int64_t last_duration
Definition: segment.c:55
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:72
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
static void close_null_ctxp(AVIOContext **pb)
Definition: segment.c:571
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:194
static int seg_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
Definition: segment.c:998
const char * av_basename(const char *path)
Thread safe basename.
Definition: avstring.c:234
int flags
can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS, AVFMT_VARIABLE_FPS, AVFMT_NODIMENSIONS, AVFMT_NOSTREAMS, AVFMT_ALLOW_FLUSH, AVFMT_TS_NONSTRICT, AVFMT_TS_NEGATIVE
Definition: avformat.h:543
uint8_t
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:203
char temp_list_filename[1024]
Definition: segment.c:124
AVOptions.
enum AVCodecID av_codec_get_id(const struct AVCodecTag *const *tags, unsigned int tag)
Get the AVCodecID for the given codec tag tag.
timestamp utils, mostly useful for debugging/logging purposes
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1665
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5319
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:4827
static int seg_write_trailer(struct AVFormatContext *s)
Definition: segment.c:955
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4237
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1417
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1460
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
int start
timecode frame start (first base frame number)
Definition: timecode.h:42
static int flags
Definition: log.c:57
#define ff_dlog(a,...)
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
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:85
ptrdiff_t size
Definition: opengl_enc.c:101
#define AVSTREAM_INIT_IN_WRITE_HEADER
stream parameters initialized in avformat_write_header
Definition: avformat.h:2433
char * format
format to use for output segment files
Definition: segment.c:79
static int select_reference_stream(AVFormatContext *s)
Definition: segment.c:577
#define av_log(a,...)
int break_non_keyframes
Definition: segment.c:120
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1368
int64_t time_delta
Definition: segment.c:111
int64_t initial_offset
initial timestamps offset, expressed in microseconds
Definition: segment.c:117
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1679
int avformat_alloc_output_context2(AVFormatContext **ctx, AVOutputFormat *oformat, const char *format_name, const char *filename)
Allocate an AVFormatContext for an output format.
Definition: mux.c:148
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
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:127
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:4188
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1567
int individual_header_trailer
Set by a private option.
Definition: segment.c:112
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
#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
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:180
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:4052
simple assert() macros that are a bit more flexible than ISO C assert().
int use_rename
Definition: segment.c:123
int64_t * times
list of segment interval specification
Definition: segment.c:102
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:970
char * reference_stream_specifier
reference stream specifier
Definition: segment.c:118
#define FFMAX(a, b)
Definition: common.h:94
static int set_segment_filename(AVFormatContext *s)
Definition: segment.c:191
int64_t offset_pts
Definition: segment.c:52
#define fail()
Definition: checkasm.h:89
int reference_stream_index
Definition: segment.c:119
static int seg_init(AVFormatContext *s)
Definition: segment.c:642
int nb_times
number of elments in the times array
Definition: segment.c:103
#define OFFSET(x)
Definition: segment.c:1017
static int segment_list_open(AVFormatContext *s)
Definition: segment.c:274
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1653
int64_t last_val
remember last time for wrap around detection
Definition: segment.c:89
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
void * opaque
User data.
Definition: avformat.h:1833
Use auto-selected escaping mode.
Definition: avstring.h:309
AVIOContext * list_pb
list file put-byte context
Definition: segment.c:95
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1405
AVBSFContext ** bsfcs
bitstream filters to run on stream
Definition: internal.h:162
static void print_csv_escaped_str(AVIOContext *ctx, const char *str)
Definition: segment.c:131
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:251
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:225
char filename[1024]
input or output filename
Definition: avformat.h:1425
int cut_pending
Definition: segment.c:90
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:519
static struct tm * localtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:37
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:485
static const AVClass sseg_class
Definition: segment.c:1084
int use_strftime
flag to expand filename with strftime
Definition: segment.c:98
const char * name
Definition: avformat.h:524
AVFormatContext * ctx
Definition: movenc.c:48
int reset_timestamps
reset timestamps at the begin of each segment
Definition: segment.c:116
int use_clocktime
flag to cut segments at regular clock time
Definition: segment.c:86
ListType
Definition: segment.c:58
int avoid_negative_ts
Avoid negative timestamps during muxing.
Definition: avformat.h:1658
int increment_tc
flag to increment timecode if found
Definition: segment.c:99
AVDictionary * metadata
Definition: avformat.h:961
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:98
Opaque data information usually sparse.
Definition: avutil.h:205
int frames
Definition: movenc.c:65
const AVClass * priv_class
AVClass for the private context.
Definition: avformat.h:552
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:491
#define FF_ARRAY_ELEMS(a)
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:859
int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
Definition: utils.c:4482
static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: segment.c:844
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
Stream structure.
Definition: avformat.h:889
char * list
filename for the segment list file
Definition: segment.c:82
int av_dict_parse_string(AVDictionary **pm, const char *str, const char *key_val_sep, const char *pairs_sep, int flags)
Parse the key/value pairs list and add the parsed entries to a dictionary.
Definition: dict.c:180
char * frames_str
segment frame numbers specification string
Definition: segment.c:105
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:163
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:237
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1241
static void seg_free(AVFormatContext *s)
Definition: segment.c:634
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
int header_written
whether we've already called avformat_write_header
Definition: segment.c:91
Timecode helpers header.
AVIOContext * pb
I/O context.
Definition: avformat.h:1391
const struct AVCodecTag *const * codec_tag
List of supported codec_id-codec_tag pairs, ordered by "better choice first".
Definition: avformat.h:549
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:183
int64_t time
segment duration
Definition: segment.c:97
void * buf
Definition: avisynth_c.h:690
GLint GLenum type
Definition: opengl_enc.c:105
int list_type
set the list type
Definition: segment.c:94
AVOutputFormat ff_segment_muxer
Definition: segment.c:1070
static int ff_rename(const char *oldpath, const char *newpath, void *logctx)
Wrap errno on rename() error.
Definition: internal.h:529
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
int segment_idx
index of the segment file to write, starting from 0
Definition: segment.c:73
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost)
Definition: ffmpeg.c:670
static const char * format
Definition: movenc.c:47
Describe the class of an AVClass context structure.
Definition: log.h:67
int * frames
list of frame number specification
Definition: segment.c:106
int64_t start_pts
Definition: segment.c:51
Rational number (pair of numerator and denominator).
Definition: rational.h:58
char * time_str
segment duration specification string
Definition: segment.c:96
AVMediaType
Definition: avutil.h:199
#define snprintf
Definition: snprintf.h:34
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4172
misc parsing utilities
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:473
SegmentListEntry * segment_list_entries
Definition: segment.c:127
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:79
int nb_frames
number of elments in the frames array
Definition: segment.c:107
char * av_timecode_make_string(const AVTimecode *tc, char *buf, int framenum)
Load timecode string in buf.
Definition: timecode.c:84
int write_header_trailer
Set by a private option.
Definition: segment.c:113
char * format_options_str
format options to use for output segment files
Definition: segment.c:80
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:184
static void segment_list_print_entry(AVIOContext *list_ioctx, ListType list_type, const SegmentListEntry *list_entry, void *log_ctx)
Definition: segment.c:309
double end_time
Definition: segment.c:50
static const AVClass seg_class
Definition: segment.c:1063
Main libavformat public API header.
int
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1546
int write_empty
Definition: segment.c:121
if(ret< 0)
Definition: vf_mcdeint.c:282
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:478
int64_t clocktime_wrap_duration
Definition: segment.c:88
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:950
#define SEGMENT_LIST_FLAG_CACHE
Definition: segment.c:68
#define E
Definition: segment.c:1018
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1055
static int parse_times(void *log_ctx, int64_t **times, int *nb_times, const char *times_str)
Definition: segment.c:440
int den
Denominator.
Definition: rational.h:60
double start_time
Definition: segment.c:50
#define av_free(p)
int segment_idx_wrap_nb
number of time the index has wraped
Definition: segment.c:75
char * value
Definition: dict.h:87
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:54
int64_t clocktime_offset
Definition: segment.c:87
void * priv_data
Format private data.
Definition: avformat.h:1377
static const AVOption options[]
Definition: segment.c:1019
#define AV_ESCAPE_FLAG_WHITESPACE
Consider spaces special and escape them even in the middle of the string.
Definition: avstring.h:322
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:337
AVOutputFormat ff_stream_segment_muxer
Definition: segment.c:1091
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1646
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1304
static int open_null_ctx(AVIOContext **ctx)
Definition: segment.c:557
#define av_freep(p)
#define AVERROR_MUXER_NOT_FOUND
Muxer not found.
Definition: error.h:60
int segment_count
number of segment files already written
Definition: segment.c:76
AVCodecParameters * codecpar
Definition: avformat.h:1252
char * times_str
segment times specification string
Definition: segment.c:101
#define av_malloc_array(a, b)
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:4060
int stream_index
Definition: avcodec.h:1649
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:926
SegmentListEntry cur_entry
Definition: segment.c:126
unsigned int av_codec_get_tag(const struct AVCodecTag *const *tags, enum AVCodecID id)
Get the codec tag for the given codec id id.
int list_size
number of entries for the segment list file
Definition: segment.c:84
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
Definition: avformat.h:1909
deprecated
Definition: segment.c:63
This structure stores compressed data.
Definition: avcodec.h:1624
int frame_count
total number of reference frames
Definition: segment.c:108
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:451
void(* io_close)(struct AVFormatContext *s, AVIOContext *pb)
A callback for closing the streams opened with AVFormatContext.io_open().
Definition: avformat.h:1915
#define SEGMENT_LIST_FLAG_LIVE
Definition: segment.c:69
SegmentListEntry * segment_list_entries_end
Definition: segment.c:128
AVOutputFormat * oformat
Definition: segment.c:77
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1640
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
#define AV_TIMECODE_STR_SIZE
Definition: timecode.h:33