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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
90  int64_t last_cut; ///< remember last cut
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  err = avformat_write_header(oc, &options);
264  av_dict_free(&options);
265  if (err < 0)
266  return err;
267  }
268 
269  seg->segment_frame_count = 0;
270  return 0;
271 }
272 
274 {
275  SegmentContext *seg = s->priv_data;
276  int ret;
277 
278  snprintf(seg->temp_list_filename, sizeof(seg->temp_list_filename), seg->use_rename ? "%s.tmp" : "%s", seg->list);
279  ret = s->io_open(s, &seg->list_pb, seg->temp_list_filename, AVIO_FLAG_WRITE, NULL);
280  if (ret < 0) {
281  av_log(s, AV_LOG_ERROR, "Failed to open segment list '%s'\n", seg->list);
282  return ret;
283  }
284 
285  if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) {
286  SegmentListEntry *entry;
287  double max_duration = 0;
288 
289  avio_printf(seg->list_pb, "#EXTM3U\n");
290  avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n");
291  avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index);
292  avio_printf(seg->list_pb, "#EXT-X-ALLOW-CACHE:%s\n",
293  seg->list_flags & SEGMENT_LIST_FLAG_CACHE ? "YES" : "NO");
294 
295  av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%d\n",
297 
298  for (entry = seg->segment_list_entries; entry; entry = entry->next)
299  max_duration = FFMAX(max_duration, entry->end_time - entry->start_time);
300  avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration));
301  } else if (seg->list_type == LIST_TYPE_FFCONCAT) {
302  avio_printf(seg->list_pb, "ffconcat version 1.0\n");
303  }
304 
305  return ret;
306 }
307 
308 static void segment_list_print_entry(AVIOContext *list_ioctx,
309  ListType list_type,
310  const SegmentListEntry *list_entry,
311  void *log_ctx)
312 {
313  switch (list_type) {
314  case LIST_TYPE_FLAT:
315  avio_printf(list_ioctx, "%s\n", list_entry->filename);
316  break;
317  case LIST_TYPE_CSV:
318  case LIST_TYPE_EXT:
319  print_csv_escaped_str(list_ioctx, list_entry->filename);
320  avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time);
321  break;
322  case LIST_TYPE_M3U8:
323  avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n",
324  list_entry->end_time - list_entry->start_time, list_entry->filename);
325  break;
326  case LIST_TYPE_FFCONCAT:
327  {
328  char *buf;
329  if (av_escape(&buf, list_entry->filename, NULL, AV_ESCAPE_MODE_AUTO, AV_ESCAPE_FLAG_WHITESPACE) < 0) {
330  av_log(log_ctx, AV_LOG_WARNING,
331  "Error writing list entry '%s' in list file\n", list_entry->filename);
332  return;
333  }
334  avio_printf(list_ioctx, "file %s\n", buf);
335  av_free(buf);
336  break;
337  }
338  default:
339  av_assert0(!"Invalid list type");
340  }
341 }
342 
343 static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
344 {
345  SegmentContext *seg = s->priv_data;
346  AVFormatContext *oc = seg->avf;
347  int ret = 0;
348  AVTimecode tc;
349  AVRational rate;
350  AVDictionaryEntry *tcr;
352  int i;
353  int err;
354 
355  av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */
356  if (write_trailer)
357  ret = av_write_trailer(oc);
358 
359  if (ret < 0)
360  av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n",
361  oc->filename);
362 
363  if (seg->list) {
364  if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) {
365  SegmentListEntry *entry = av_mallocz(sizeof(*entry));
366  if (!entry) {
367  ret = AVERROR(ENOMEM);
368  goto end;
369  }
370 
371  /* append new element */
372  memcpy(entry, &seg->cur_entry, sizeof(*entry));
373  entry->filename = av_strdup(entry->filename);
374  if (!seg->segment_list_entries)
376  else
377  seg->segment_list_entries_end->next = entry;
378  seg->segment_list_entries_end = entry;
379 
380  /* drop first item */
381  if (seg->list_size && seg->segment_count >= seg->list_size) {
382  entry = seg->segment_list_entries;
384  av_freep(&entry->filename);
385  av_freep(&entry);
386  }
387 
388  if ((ret = segment_list_open(s)) < 0)
389  goto end;
390  for (entry = seg->segment_list_entries; entry; entry = entry->next)
391  segment_list_print_entry(seg->list_pb, seg->list_type, entry, s);
392  if (seg->list_type == LIST_TYPE_M3U8 && is_last)
393  avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n");
394  ff_format_io_close(s, &seg->list_pb);
395  if (seg->use_rename)
396  ff_rename(seg->temp_list_filename, seg->list, s);
397  } else {
398  segment_list_print_entry(seg->list_pb, seg->list_type, &seg->cur_entry, s);
399  avio_flush(seg->list_pb);
400  }
401  }
402 
403  av_log(s, AV_LOG_VERBOSE, "segment:'%s' count:%d ended\n",
404  seg->avf->filename, seg->segment_count);
405  seg->segment_count++;
406 
407  if (seg->increment_tc) {
408  tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
409  if (tcr) {
410  /* search the first video stream */
411  for (i = 0; i < s->nb_streams; i++) {
413  rate = s->streams[i]->avg_frame_rate;/* Get fps from the video stream */
414  err = av_timecode_init_from_string(&tc, rate, tcr->value, s);
415  if (err < 0) {
416  av_log(s, AV_LOG_WARNING, "Could not increment timecode, error occurred during timecode creation.");
417  break;
418  }
419  tc.start += (int)((seg->cur_entry.end_time - seg->cur_entry.start_time) * av_q2d(rate));/* increment timecode */
420  av_dict_set(&s->metadata, "timecode",
421  av_timecode_make_string(&tc, buf, 0), 0);
422  break;
423  }
424  }
425  } else {
426  av_log(s, AV_LOG_WARNING, "Could not increment timecode, no timecode metadata found");
427  }
428  }
429 
430 end:
431  ff_format_io_close(oc, &oc->pb);
432 
433  return ret;
434 }
435 
436 static int parse_times(void *log_ctx, int64_t **times, int *nb_times,
437  const char *times_str)
438 {
439  char *p;
440  int i, ret = 0;
441  char *times_str1 = av_strdup(times_str);
442  char *saveptr = NULL;
443 
444  if (!times_str1)
445  return AVERROR(ENOMEM);
446 
447 #define FAIL(err) ret = err; goto end
448 
449  *nb_times = 1;
450  for (p = times_str1; *p; p++)
451  if (*p == ',')
452  (*nb_times)++;
453 
454  *times = av_malloc_array(*nb_times, sizeof(**times));
455  if (!*times) {
456  av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n");
457  FAIL(AVERROR(ENOMEM));
458  }
459 
460  p = times_str1;
461  for (i = 0; i < *nb_times; i++) {
462  int64_t t;
463  char *tstr = av_strtok(p, ",", &saveptr);
464  p = NULL;
465 
466  if (!tstr || !tstr[0]) {
467  av_log(log_ctx, AV_LOG_ERROR, "Empty time specification in times list %s\n",
468  times_str);
469  FAIL(AVERROR(EINVAL));
470  }
471 
472  ret = av_parse_time(&t, tstr, 1);
473  if (ret < 0) {
474  av_log(log_ctx, AV_LOG_ERROR,
475  "Invalid time duration specification '%s' in times list %s\n", tstr, times_str);
476  FAIL(AVERROR(EINVAL));
477  }
478  (*times)[i] = t;
479 
480  /* check on monotonicity */
481  if (i && (*times)[i-1] > (*times)[i]) {
482  av_log(log_ctx, AV_LOG_ERROR,
483  "Specified time %f is greater than the following time %f\n",
484  (float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000);
485  FAIL(AVERROR(EINVAL));
486  }
487  }
488 
489 end:
490  av_free(times_str1);
491  return ret;
492 }
493 
494 static int parse_frames(void *log_ctx, int **frames, int *nb_frames,
495  const char *frames_str)
496 {
497  char *p;
498  int i, ret = 0;
499  char *frames_str1 = av_strdup(frames_str);
500  char *saveptr = NULL;
501 
502  if (!frames_str1)
503  return AVERROR(ENOMEM);
504 
505 #define FAIL(err) ret = err; goto end
506 
507  *nb_frames = 1;
508  for (p = frames_str1; *p; p++)
509  if (*p == ',')
510  (*nb_frames)++;
511 
512  *frames = av_malloc_array(*nb_frames, sizeof(**frames));
513  if (!*frames) {
514  av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced frames array\n");
515  FAIL(AVERROR(ENOMEM));
516  }
517 
518  p = frames_str1;
519  for (i = 0; i < *nb_frames; i++) {
520  long int f;
521  char *tailptr;
522  char *fstr = av_strtok(p, ",", &saveptr);
523 
524  p = NULL;
525  if (!fstr) {
526  av_log(log_ctx, AV_LOG_ERROR, "Empty frame specification in frame list %s\n",
527  frames_str);
528  FAIL(AVERROR(EINVAL));
529  }
530  f = strtol(fstr, &tailptr, 10);
531  if (*tailptr || f <= 0 || f >= INT_MAX) {
532  av_log(log_ctx, AV_LOG_ERROR,
533  "Invalid argument '%s', must be a positive integer <= INT64_MAX\n",
534  fstr);
535  FAIL(AVERROR(EINVAL));
536  }
537  (*frames)[i] = f;
538 
539  /* check on monotonicity */
540  if (i && (*frames)[i-1] > (*frames)[i]) {
541  av_log(log_ctx, AV_LOG_ERROR,
542  "Specified frame %d is greater than the following frame %d\n",
543  (*frames)[i], (*frames)[i-1]);
544  FAIL(AVERROR(EINVAL));
545  }
546  }
547 
548 end:
549  av_free(frames_str1);
550  return ret;
551 }
552 
554 {
555  int buf_size = 32768;
556  uint8_t *buf = av_malloc(buf_size);
557  if (!buf)
558  return AVERROR(ENOMEM);
559  *ctx = avio_alloc_context(buf, buf_size, AVIO_FLAG_WRITE, NULL, NULL, NULL, NULL);
560  if (!*ctx) {
561  av_free(buf);
562  return AVERROR(ENOMEM);
563  }
564  return 0;
565 }
566 
567 static void close_null_ctxp(AVIOContext **pb)
568 {
569  av_freep(&(*pb)->buffer);
570  av_freep(pb);
571 }
572 
574 {
575  SegmentContext *seg = s->priv_data;
576  int ret, i;
577 
578  seg->reference_stream_index = -1;
579  if (!strcmp(seg->reference_stream_specifier, "auto")) {
580  /* select first index of type with highest priority */
581  int type_index_map[AVMEDIA_TYPE_NB];
582  static const enum AVMediaType type_priority_list[] = {
588  };
589  enum AVMediaType type;
590 
591  for (i = 0; i < AVMEDIA_TYPE_NB; i++)
592  type_index_map[i] = -1;
593 
594  /* select first index for each type */
595  for (i = 0; i < s->nb_streams; i++) {
596  type = s->streams[i]->codecpar->codec_type;
597  if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1
598  /* ignore attached pictures/cover art streams */
600  type_index_map[type] = i;
601  }
602 
603  for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) {
604  type = type_priority_list[i];
605  if ((seg->reference_stream_index = type_index_map[type]) >= 0)
606  break;
607  }
608  } else {
609  for (i = 0; i < s->nb_streams; i++) {
612  if (ret < 0)
613  return ret;
614  if (ret > 0) {
615  seg->reference_stream_index = i;
616  break;
617  }
618  }
619  }
620 
621  if (seg->reference_stream_index < 0) {
622  av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n",
624  return AVERROR(EINVAL);
625  }
626 
627  return 0;
628 }
629 
631 {
632  ff_format_io_close(seg->avf, &seg->list_pb);
634  seg->avf = NULL;
635 }
636 
638 {
639  SegmentContext *seg = s->priv_data;
640  AVFormatContext *oc = seg->avf;
642  int ret;
643  int i;
644 
645  seg->segment_count = 0;
646  if (!seg->write_header_trailer)
647  seg->individual_header_trailer = 0;
648 
649  if (seg->header_filename) {
650  seg->write_header_trailer = 1;
651  seg->individual_header_trailer = 0;
652  }
653 
654  if (!!seg->time_str + !!seg->times_str + !!seg->frames_str > 1) {
655  av_log(s, AV_LOG_ERROR,
656  "segment_time, segment_times, and segment_frames options "
657  "are mutually exclusive, select just one of them\n");
658  return AVERROR(EINVAL);
659  }
660 
661  if (seg->times_str) {
662  if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0)
663  return ret;
664  } else if (seg->frames_str) {
665  if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0)
666  return ret;
667  } else {
668  /* set default value if not specified */
669  if (!seg->time_str)
670  seg->time_str = av_strdup("2");
671  if ((ret = av_parse_time(&seg->time, seg->time_str, 1)) < 0) {
672  av_log(s, AV_LOG_ERROR,
673  "Invalid time duration specification '%s' for segment_time option\n",
674  seg->time_str);
675  return ret;
676  }
677  if (seg->use_clocktime) {
678  if (seg->time <= 0) {
679  av_log(s, AV_LOG_ERROR, "Invalid negative segment_time with segment_atclocktime option set\n");
680  return AVERROR(EINVAL);
681  }
682  seg->clocktime_offset = seg->time - (seg->clocktime_offset % seg->time);
683  }
684  }
685 
686  if (seg->format_options_str) {
687  ret = av_dict_parse_string(&seg->format_options, seg->format_options_str, "=", ":", 0);
688  if (ret < 0) {
689  av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n",
690  seg->format_options_str);
691  goto fail;
692  }
693  }
694 
695  if (seg->list) {
696  if (seg->list_type == LIST_TYPE_UNDEFINED) {
697  if (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV;
698  else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT;
699  else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8;
700  else if (av_match_ext(seg->list, "ffcat,ffconcat")) seg->list_type = LIST_TYPE_FFCONCAT;
701  else seg->list_type = LIST_TYPE_FLAT;
702  }
703  if (!seg->list_size && seg->list_type != LIST_TYPE_M3U8) {
704  if ((ret = segment_list_open(s)) < 0)
705  goto fail;
706  } else {
707  const char *proto = avio_find_protocol_name(s->filename);
708  seg->use_rename = proto && !strcmp(proto, "file");
709  }
710  }
711 
712  if (seg->list_type == LIST_TYPE_EXT)
713  av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n");
714 
715  if ((ret = select_reference_stream(s)) < 0)
716  goto fail;
717  av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n",
720 
721  seg->oformat = av_guess_format(seg->format, s->filename, NULL);
722 
723  if (!seg->oformat) {
725  goto fail;
726  }
727  if (seg->oformat->flags & AVFMT_NOFILE) {
728  av_log(s, AV_LOG_ERROR, "format %s not supported.\n",
729  seg->oformat->name);
730  ret = AVERROR(EINVAL);
731  goto fail;
732  }
733 
734  if ((ret = segment_mux_init(s)) < 0)
735  goto fail;
736 
737  if ((ret = set_segment_filename(s)) < 0)
738  goto fail;
739  oc = seg->avf;
740 
741  if (seg->write_header_trailer) {
742  if ((ret = s->io_open(s, &oc->pb,
743  seg->header_filename ? seg->header_filename : oc->filename,
744  AVIO_FLAG_WRITE, NULL)) < 0) {
745  av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->filename);
746  goto fail;
747  }
748  if (!seg->individual_header_trailer)
749  oc->pb->seekable = 0;
750  } else {
751  if ((ret = open_null_ctx(&oc->pb)) < 0)
752  goto fail;
753  }
754 
755  av_dict_copy(&options, seg->format_options, 0);
756  ret = avformat_write_header(oc, &options);
757  if (av_dict_count(options)) {
758  av_log(s, AV_LOG_ERROR,
759  "Some of the provided format options in '%s' are not recognized\n", seg->format_options_str);
760  ret = AVERROR(EINVAL);
761  goto fail;
762  }
763 
764  if (ret < 0) {
765  ff_format_io_close(oc, &oc->pb);
766  goto fail;
767  }
768  seg->segment_frame_count = 0;
769 
770  av_assert0(s->nb_streams == oc->nb_streams);
771  for (i = 0; i < s->nb_streams; i++) {
772  AVStream *inner_st = oc->streams[i];
773  AVStream *outer_st = s->streams[i];
774  avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
775  }
776 
777  if (oc->avoid_negative_ts > 0 && s->avoid_negative_ts < 0)
778  s->avoid_negative_ts = 1;
779 
780  if (!seg->write_header_trailer || seg->header_filename) {
781  if (seg->header_filename) {
782  av_write_frame(oc, NULL);
783  ff_format_io_close(oc, &oc->pb);
784  } else {
785  close_null_ctxp(&oc->pb);
786  }
787  if ((ret = oc->io_open(oc, &oc->pb, oc->filename, AVIO_FLAG_WRITE, NULL)) < 0)
788  goto fail;
789  if (!seg->individual_header_trailer)
790  oc->pb->seekable = 0;
791  }
792 
793 fail:
794  av_dict_free(&options);
795  if (ret < 0)
796  seg_free_context(seg);
797 
798  return ret;
799 }
800 
802 {
803  SegmentContext *seg = s->priv_data;
804  AVStream *st = s->streams[pkt->stream_index];
805  int64_t end_pts = INT64_MAX, offset;
806  int start_frame = INT_MAX;
807  int ret;
808  struct tm ti;
809  int64_t usecs;
810  int64_t wrapped_val;
811 
812  if (!seg->avf)
813  return AVERROR(EINVAL);
814 
815 calc_times:
816  if (seg->times) {
817  end_pts = seg->segment_count < seg->nb_times ?
818  seg->times[seg->segment_count] : INT64_MAX;
819  } else if (seg->frames) {
820  start_frame = seg->segment_count < seg->nb_frames ?
821  seg->frames[seg->segment_count] : INT_MAX;
822  } else {
823  if (seg->use_clocktime) {
824  int64_t avgt = av_gettime();
825  time_t sec = avgt / 1000000;
826  localtime_r(&sec, &ti);
827  usecs = (int64_t)(ti.tm_hour * 3600 + ti.tm_min * 60 + ti.tm_sec) * 1000000 + (avgt % 1000000);
828  wrapped_val = (usecs + seg->clocktime_offset) % seg->time;
829  if (seg->last_cut != usecs && wrapped_val < seg->last_val && wrapped_val < seg->clocktime_wrap_duration) {
830  seg->cut_pending = 1;
831  seg->last_cut = usecs;
832  }
833  seg->last_val = wrapped_val;
834  } else {
835  end_pts = seg->time * (seg->segment_count + 1);
836  }
837  }
838 
839  ff_dlog(s, "packet stream:%d pts:%s pts_time:%s duration_time:%s is_key:%d frame:%d\n",
840  pkt->stream_index, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
841  av_ts2timestr(pkt->duration, &st->time_base),
842  pkt->flags & AV_PKT_FLAG_KEY,
843  pkt->stream_index == seg->reference_stream_index ? seg->frame_count : -1);
844 
845  if (pkt->stream_index == seg->reference_stream_index &&
846  (pkt->flags & AV_PKT_FLAG_KEY || seg->break_non_keyframes) &&
847  (seg->segment_frame_count > 0 || seg->write_empty) &&
848  (seg->cut_pending || seg->frame_count >= start_frame ||
849  (pkt->pts != AV_NOPTS_VALUE &&
850  av_compare_ts(pkt->pts, st->time_base,
851  end_pts - seg->time_delta, AV_TIME_BASE_Q) >= 0))) {
852  /* sanitize end time in case last packet didn't have a defined duration */
853  if (seg->cur_entry.last_duration == 0)
854  seg->cur_entry.end_time = (double)pkt->pts * av_q2d(st->time_base);
855 
856  if ((ret = segment_end(s, seg->individual_header_trailer, 0)) < 0)
857  goto fail;
858 
859  if ((ret = segment_start(s, seg->individual_header_trailer)) < 0)
860  goto fail;
861 
862  seg->cut_pending = 0;
864  seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base);
867 
868  if (seg->times || (!seg->frames && !seg->use_clocktime) && seg->write_empty)
869  goto calc_times;
870  }
871 
872  if (pkt->stream_index == seg->reference_stream_index) {
873  if (pkt->pts != AV_NOPTS_VALUE)
874  seg->cur_entry.end_time =
875  FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base));
876  seg->cur_entry.last_duration = pkt->duration;
877  }
878 
879  if (seg->segment_frame_count == 0) {
880  av_log(s, AV_LOG_VERBOSE, "segment:'%s' starts with packet stream:%d pts:%s pts_time:%s frame:%d\n",
881  seg->avf->filename, pkt->stream_index,
882  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), seg->frame_count);
883  }
884 
885  av_log(s, AV_LOG_DEBUG, "stream:%d start_pts_time:%s pts:%s pts_time:%s dts:%s dts_time:%s",
886  pkt->stream_index,
888  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
889  av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
890 
891  /* compute new timestamps */
892  offset = av_rescale_q(seg->initial_offset - (seg->reset_timestamps ? seg->cur_entry.start_pts : 0),
894  if (pkt->pts != AV_NOPTS_VALUE)
895  pkt->pts += offset;
896  if (pkt->dts != AV_NOPTS_VALUE)
897  pkt->dts += offset;
898 
899  av_log(s, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
900  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
901  av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
902 
903  ret = ff_write_chained(seg->avf, pkt->stream_index, pkt, s, seg->initial_offset || seg->reset_timestamps);
904 
905 fail:
906  if (pkt->stream_index == seg->reference_stream_index) {
907  seg->frame_count++;
908  seg->segment_frame_count++;
909  }
910 
911  if (ret < 0)
912  seg_free_context(seg);
913 
914  return ret;
915 }
916 
918 {
919  SegmentContext *seg = s->priv_data;
920  AVFormatContext *oc = seg->avf;
921  SegmentListEntry *cur, *next;
922  int ret = 0;
923 
924  if (!oc)
925  goto fail;
926 
927  if (!seg->write_header_trailer) {
928  if ((ret = segment_end(s, 0, 1)) < 0)
929  goto fail;
930  if ((ret = open_null_ctx(&oc->pb)) < 0)
931  goto fail;
932  ret = av_write_trailer(oc);
933  close_null_ctxp(&oc->pb);
934  } else {
935  ret = segment_end(s, 1, 1);
936  }
937 fail:
938  if (seg->list)
939  ff_format_io_close(s, &seg->list_pb);
940 
942  av_opt_free(seg);
943  av_freep(&seg->times);
944  av_freep(&seg->frames);
945  av_freep(&seg->cur_entry.filename);
946 
947  cur = seg->segment_list_entries;
948  while (cur) {
949  next = cur->next;
950  av_freep(&cur->filename);
951  av_free(cur);
952  cur = next;
953  }
954 
956  seg->avf = NULL;
957  return ret;
958 }
959 
960 #define OFFSET(x) offsetof(SegmentContext, x)
961 #define E AV_OPT_FLAG_ENCODING_PARAM
962 static const AVOption options[] = {
963  { "reference_stream", "set reference stream", OFFSET(reference_stream_specifier), AV_OPT_TYPE_STRING, {.str = "auto"}, CHAR_MIN, CHAR_MAX, E },
964  { "segment_format", "set container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
965  { "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 },
966  { "segment_list", "set the segment list filename", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
967  { "segment_header_filename", "write a single file containing the header", OFFSET(header_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
968 
969  { "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"},
970  { "cache", "allow list caching", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX, E, "list_flags"},
971  { "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"},
972 
973  { "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
974 
975  { "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" },
976  { "flat", "flat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, E, "list_type" },
977  { "csv", "csv format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV }, INT_MIN, INT_MAX, E, "list_type" },
978  { "ext", "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT }, INT_MIN, INT_MAX, E, "list_type" },
979  { "ffconcat", "ffconcat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FFCONCAT }, INT_MIN, INT_MAX, E, "list_type" },
980  { "m3u8", "M3U8 format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
981  { "hls", "Apple HTTP Live Streaming compatible", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
982 
983  { "segment_atclocktime", "set segment to be cut at clocktime", OFFSET(use_clocktime), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E},
984  { "segment_clocktime_offset", "set segment clocktime offset", OFFSET(clocktime_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 86400000000LL, E},
985  { "segment_clocktime_wrap_duration", "set segment clocktime wrapping duration", OFFSET(clocktime_wrap_duration), AV_OPT_TYPE_DURATION, {.i64 = INT64_MAX}, 0, INT64_MAX, E},
986  { "segment_time", "set segment duration", OFFSET(time_str),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
987  { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 0, E },
988  { "segment_times", "set segment split time points", OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
989  { "segment_frames", "set segment split frame numbers", OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
990  { "segment_wrap", "set number after which the index wraps", OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
991  { "segment_list_entry_prefix", "set base url prefix for segments", OFFSET(entry_prefix), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
992  { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
993  { "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 },
994  { "strftime", "set filename expansion with strftime at segment creation", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
995  { "increment_tc", "increment timecode between each segment", OFFSET(increment_tc), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
996  { "break_non_keyframes", "allow breaking segments on non-keyframes", OFFSET(break_non_keyframes), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
997 
998  { "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E },
999  { "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 },
1000  { "reset_timestamps", "reset timestamps at the begin of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1001  { "initial_offset", "set initial timestamp offset", OFFSET(initial_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E },
1002  { "write_empty_segments", "allow writing empty 'filler' segments", OFFSET(write_empty), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1003  { NULL },
1004 };
1005 
1006 static const AVClass seg_class = {
1007  .class_name = "segment muxer",
1008  .item_name = av_default_item_name,
1009  .option = options,
1010  .version = LIBAVUTIL_VERSION_INT,
1011 };
1012 
1014  .name = "segment",
1015  .long_name = NULL_IF_CONFIG_SMALL("segment"),
1016  .priv_data_size = sizeof(SegmentContext),
1018  .init = seg_init,
1021  .priv_class = &seg_class,
1022 };
1023 
1024 static const AVClass sseg_class = {
1025  .class_name = "stream_segment muxer",
1026  .item_name = av_default_item_name,
1027  .option = options,
1028  .version = LIBAVUTIL_VERSION_INT,
1029 };
1030 
1032  .name = "stream_segment,ssegment",
1033  .long_name = NULL_IF_CONFIG_SMALL("streaming segment muxer"),
1034  .priv_data_size = sizeof(SegmentContext),
1035  .flags = AVFMT_NOFILE,
1036  .init = seg_init,
1039  .priv_class = &sseg_class,
1040 };
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:631
Bytestream IO Context.
Definition: avio.h:147
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1577
char * header_filename
filename to write the output header to
Definition: segment.c:114
AVOption.
Definition: opt.h:245
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:871
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
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:4493
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:559
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:1267
#define FAIL(err)
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3939
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:943
int num
numerator
Definition: rational.h:44
int av_dict_count(const AVDictionary *m)
Get number of entries in dictionary.
Definition: dict.c:34
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:607
#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:216
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:3931
static int parse_frames(void *log_ctx, int **frames, int *nb_frames, const char *frames_str)
Definition: segment.c:494
static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
Definition: segment.c:343
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:1325
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:567
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:193
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:541
uint8_t
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:195
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:1606
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5182
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:4712
static int seg_write_trailer(struct AVFormatContext *s)
Definition: segment.c:917
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4131
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1393
static double av_q2d(AVRational a)
Convert rational to double.
Definition: rational.h:80
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:39
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1436
int start
timecode frame start (first base frame number)
Definition: timecode.h:42
#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
char * format
format to use for output segment files
Definition: segment.c:79
static int select_reference_stream(AVFormatContext *s)
Definition: segment.c:573
#define av_log(a,...)
int break_non_keyframes
Definition: segment.c:120
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1344
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:1620
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:126
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:4059
#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:1539
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:176
#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:202
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3935
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:954
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:82
int reference_stream_index
Definition: segment.c:119
static int seg_init(AVFormatContext *s)
Definition: segment.c:637
int nb_times
number of elments in the times array
Definition: segment.c:103
#define OFFSET(x)
Definition: segment.c:960
static int segment_list_open(AVFormatContext *s)
Definition: segment.c:273
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1594
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 2 timestamps each in its own timebases.
Definition: mathematics.c:147
void * opaque
User data.
Definition: avformat.h:1805
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:1381
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:243
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:224
char filename[1024]
input or output filename
Definition: avformat.h:1401
int cut_pending
Definition: segment.c:91
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:496
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:483
static const AVClass sseg_class
Definition: segment.c:1024
int use_strftime
flag to expand filename with strftime
Definition: segment.c:98
const char * name
Definition: avformat.h:522
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:1630
int increment_tc
flag to increment timecode if found
Definition: segment.c:99
AVDictionary * metadata
Definition: avformat.h:945
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:197
int frames
Definition: movenc.c:65
const AVClass * priv_class
AVClass for the private context.
Definition: avformat.h:550
#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:851
int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
Return in 'buf' the path with 'd' replaced by a number.
Definition: utils.c:4318
static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: segment.c:801
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
Stream structure.
Definition: avformat.h:876
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:179
char * frames_str
segment frame numbers specification string
Definition: segment.c:105
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:252
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:267
Timecode helpers header.
AVIOContext * pb
I/O context.
Definition: avformat.h:1367
const struct AVCodecTag *const * codec_tag
List of supported codec_id-codec_tag pairs, ordered by "better choice first".
Definition: avformat.h:547
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:182
int64_t time
segment duration
Definition: segment.c:97
void * buf
Definition: avisynth_c.h:553
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:1013
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:69
static int ff_rename(const char *oldpath, const char *newpath, void *logctx)
Wrap errno on rename() error.
Definition: internal.h:509
int segment_idx
index of the segment file to write, starting from 0
Definition: segment.c:73
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 numerator/denominator
Definition: rational.h:43
char * time_str
segment duration specification string
Definition: segment.c:96
AVMediaType
Definition: avutil.h:191
#define snprintf
Definition: snprintf.h:34
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4067
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
static int flags
Definition: cpu.c:47
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:308
double end_time
Definition: segment.c:50
static const AVClass seg_class
Definition: segment.c:1006
Main libavformat public API header.
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1516
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:476
int64_t clocktime_wrap_duration
Definition: segment.c:88
int av_reallocp(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:187
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:934
#define SEGMENT_LIST_FLAG_CACHE
Definition: segment.c:68
#define E
Definition: segment.c:961
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1037
static int parse_times(void *log_ctx, int64_t **times, int *nb_times, const char *times_str)
Definition: segment.c:436
int den
denominator
Definition: rational.h:45
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:1353
static const AVOption options[]
Definition: segment.c:962
int64_t last_cut
remember last cut
Definition: segment.c:90
#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:498
AVOutputFormat ff_stream_segment_muxer
Definition: segment.c:1031
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1587
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1200
static int open_null_ctx(AVIOContext **ctx)
Definition: segment.c:553
#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:1228
static void seg_free_context(SegmentContext *seg)
Definition: segment.c:630
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:3943
int stream_index
Definition: avcodec.h:1590
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:913
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:1883
deprecated
Definition: segment.c:63
This structure stores compressed data.
Definition: avcodec.h:1565
int frame_count
total number of reference frames
Definition: segment.c:108
static int write_packet(AVFormatContext *s1, AVPacket *pkt)
Definition: v4l2enc.c:86
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:431
void(* io_close)(struct AVFormatContext *s, AVIOContext *pb)
A callback for closing the streams opened with AVFormatContext.io_open().
Definition: avformat.h:1889
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
#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:1581
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
#define AV_TIMECODE_STR_SIZE
Definition: timecode.h:33