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hlsenc.c
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1 /*
2  * Apple HTTP Live Streaming segmenter
3  * Copyright (c) 2012, Luca Barbato
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "config.h"
23 #include <float.h>
24 #include <stdint.h>
25 #if HAVE_UNISTD_H
26 #include <unistd.h>
27 #endif
28 
29 #include "libavutil/avassert.h"
30 #include "libavutil/mathematics.h"
31 #include "libavutil/parseutils.h"
32 #include "libavutil/avstring.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/log.h"
36 
37 #include "avformat.h"
38 #include "avio_internal.h"
39 #include "internal.h"
40 #include "os_support.h"
41 
42 #define KEYSIZE 16
43 #define LINE_BUFFER_SIZE 1024
44 
45 typedef struct HLSSegment {
46  char filename[1024];
47  char sub_filename[1024];
48  double duration; /* in seconds */
49  int64_t pos;
50  int64_t size;
51 
53  char iv_string[KEYSIZE*2 + 1];
54 
55  struct HLSSegment *next;
56 } HLSSegment;
57 
58 typedef enum HLSFlags {
59  // Generate a single media file and use byte ranges in the playlist.
60  HLS_SINGLE_FILE = (1 << 0),
61  HLS_DELETE_SEGMENTS = (1 << 1),
62  HLS_ROUND_DURATIONS = (1 << 2),
63  HLS_DISCONT_START = (1 << 3),
64  HLS_OMIT_ENDLIST = (1 << 4),
65 } HLSFlags;
66 
67 typedef enum {
72 } PlaylistType;
73 
74 typedef struct HLSContext {
75  const AVClass *class; // Class for private options.
76  unsigned number;
77  int64_t sequence;
78  int64_t start_sequence;
81 
84 
85  float time; // Set by a private option.
86  int max_nb_segments; // Set by a private option.
87  int wrap; // Set by a private option.
88  uint32_t flags; // enum HLSFlags
89  uint32_t pl_type; // enum PlaylistType
91 
92  int use_localtime; ///< flag to expand filename with localtime
93  int use_localtime_mkdir;///< flag to mkdir dirname in timebased filename
95  int64_t recording_time;
96  int has_video;
98  int64_t start_pts;
99  int64_t end_pts;
100  double duration; // last segment duration computed so far, in seconds
101  int64_t start_pos; // last segment starting position
102  int64_t size; // last segment size
105 
109 
110  char *basename;
113  char *baseurl;
118 
122  char key_string[KEYSIZE*2 + 1];
123  char iv_string[KEYSIZE*2 + 1];
125 
126  char *method;
127 
128 } HLSContext;
129 
131 
132  HLSSegment *segment, *previous_segment = NULL;
133  float playlist_duration = 0.0f;
134  int ret = 0, path_size, sub_path_size;
135  char *dirname = NULL, *p, *sub_path;
136  char *path = NULL;
137 
138  segment = hls->segments;
139  while (segment) {
140  playlist_duration += segment->duration;
141  segment = segment->next;
142  }
143 
144  segment = hls->old_segments;
145  while (segment) {
146  playlist_duration -= segment->duration;
147  previous_segment = segment;
148  segment = previous_segment->next;
149  if (playlist_duration <= -previous_segment->duration) {
150  previous_segment->next = NULL;
151  break;
152  }
153  }
154 
155  if (segment) {
156  if (hls->segment_filename) {
157  dirname = av_strdup(hls->segment_filename);
158  } else {
159  dirname = av_strdup(hls->avf->filename);
160  }
161  if (!dirname) {
162  ret = AVERROR(ENOMEM);
163  goto fail;
164  }
165  p = (char *)av_basename(dirname);
166  *p = '\0';
167  }
168 
169  while (segment) {
170  av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n",
171  segment->filename);
172  path_size = strlen(dirname) + strlen(segment->filename) + 1;
173  path = av_malloc(path_size);
174  if (!path) {
175  ret = AVERROR(ENOMEM);
176  goto fail;
177  }
178 
179  av_strlcpy(path, dirname, path_size);
180  av_strlcat(path, segment->filename, path_size);
181  if (unlink(path) < 0) {
182  av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
183  path, strerror(errno));
184  }
185 
186  if (segment->sub_filename[0] != '\0') {
187  sub_path_size = strlen(dirname) + strlen(segment->sub_filename) + 1;
188  sub_path = av_malloc(sub_path_size);
189  if (!sub_path) {
190  ret = AVERROR(ENOMEM);
191  goto fail;
192  }
193 
194  av_strlcpy(sub_path, dirname, sub_path_size);
195  av_strlcat(sub_path, segment->sub_filename, sub_path_size);
196  if (unlink(sub_path) < 0) {
197  av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
198  sub_path, strerror(errno));
199  }
200  av_free(sub_path);
201  }
202  av_freep(&path);
203  previous_segment = segment;
204  segment = previous_segment->next;
205  av_free(previous_segment);
206  }
207 
208 fail:
209  av_free(path);
210  av_free(dirname);
211 
212  return ret;
213 }
214 
216 {
217  HLSContext *hls = s->priv_data;
218  int ret;
219  AVIOContext *pb;
220  uint8_t key[KEYSIZE];
221 
222  if ((ret = s->io_open(s, &pb, hls->key_info_file, AVIO_FLAG_READ, NULL)) < 0) {
223  av_log(hls, AV_LOG_ERROR,
224  "error opening key info file %s\n", hls->key_info_file);
225  return ret;
226  }
227 
228  ff_get_line(pb, hls->key_uri, sizeof(hls->key_uri));
229  hls->key_uri[strcspn(hls->key_uri, "\r\n")] = '\0';
230 
231  ff_get_line(pb, hls->key_file, sizeof(hls->key_file));
232  hls->key_file[strcspn(hls->key_file, "\r\n")] = '\0';
233 
234  ff_get_line(pb, hls->iv_string, sizeof(hls->iv_string));
235  hls->iv_string[strcspn(hls->iv_string, "\r\n")] = '\0';
236 
237  ff_format_io_close(s, &pb);
238 
239  if (!*hls->key_uri) {
240  av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
241  return AVERROR(EINVAL);
242  }
243 
244  if (!*hls->key_file) {
245  av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
246  return AVERROR(EINVAL);
247  }
248 
249  if ((ret = s->io_open(s, &pb, hls->key_file, AVIO_FLAG_READ, NULL)) < 0) {
250  av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", hls->key_file);
251  return ret;
252  }
253 
254  ret = avio_read(pb, key, sizeof(key));
255  ff_format_io_close(s, &pb);
256  if (ret != sizeof(key)) {
257  av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", hls->key_file);
258  if (ret >= 0 || ret == AVERROR_EOF)
259  ret = AVERROR(EINVAL);
260  return ret;
261  }
262  ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
263 
264  return 0;
265 }
266 
268 {
269  HLSContext *hls = s->priv_data;
270  AVFormatContext *oc;
271  AVFormatContext *vtt_oc = NULL;
272  int i, ret;
273 
274  ret = avformat_alloc_output_context2(&hls->avf, hls->oformat, NULL, NULL);
275  if (ret < 0)
276  return ret;
277  oc = hls->avf;
278 
279  oc->oformat = hls->oformat;
281  oc->max_delay = s->max_delay;
282  oc->opaque = s->opaque;
283  oc->io_open = s->io_open;
284  oc->io_close = s->io_close;
285  av_dict_copy(&oc->metadata, s->metadata, 0);
286 
287  if(hls->vtt_oformat) {
289  if (ret < 0)
290  return ret;
291  vtt_oc = hls->vtt_avf;
292  vtt_oc->oformat = hls->vtt_oformat;
293  av_dict_copy(&vtt_oc->metadata, s->metadata, 0);
294  }
295 
296  for (i = 0; i < s->nb_streams; i++) {
297  AVStream *st;
298  AVFormatContext *loc;
300  loc = vtt_oc;
301  else
302  loc = oc;
303 
304  if (!(st = avformat_new_stream(loc, NULL)))
305  return AVERROR(ENOMEM);
308  st->time_base = s->streams[i]->time_base;
309  }
310  hls->start_pos = 0;
311 
312  return 0;
313 }
314 
315 /* Create a new segment and append it to the segment list */
316 static int hls_append_segment(struct AVFormatContext *s, HLSContext *hls, double duration,
317  int64_t pos, int64_t size)
318 {
319  HLSSegment *en = av_malloc(sizeof(*en));
320  char *tmp, *p;
321  const char *pl_dir, *filename;
322  int ret;
323 
324  if (!en)
325  return AVERROR(ENOMEM);
326 
327  filename = av_basename(hls->avf->filename);
328 
329  if (hls->use_localtime_mkdir) {
330  /* Possibly prefix with mkdir'ed subdir, if playlist share same
331  * base path. */
332  tmp = av_strdup(s->filename);
333  if (!tmp) {
334  av_free(en);
335  return AVERROR(ENOMEM);
336  }
337 
338  pl_dir = av_dirname(tmp);
339  p = hls->avf->filename;
340  if (strstr(p, pl_dir) == p)
341  filename = hls->avf->filename + strlen(pl_dir) + 1;
342  av_free(tmp);
343  }
344  av_strlcpy(en->filename, filename, sizeof(en->filename));
345 
346  if(hls->has_subtitle)
348  else
349  en->sub_filename[0] = '\0';
350 
351  en->duration = duration;
352  en->pos = pos;
353  en->size = size;
354  en->next = NULL;
355 
356  if (hls->key_info_file) {
357  av_strlcpy(en->key_uri, hls->key_uri, sizeof(en->key_uri));
358  av_strlcpy(en->iv_string, hls->iv_string, sizeof(en->iv_string));
359  }
360 
361  if (!hls->segments)
362  hls->segments = en;
363  else
364  hls->last_segment->next = en;
365 
366  hls->last_segment = en;
367 
368  // EVENT or VOD playlists imply sliding window cannot be used
369  if (hls->pl_type != PLAYLIST_TYPE_NONE)
370  hls->max_nb_segments = 0;
371 
372  if (hls->max_nb_segments && hls->nb_entries >= hls->max_nb_segments) {
373  en = hls->segments;
374  hls->segments = en->next;
375  if (en && hls->flags & HLS_DELETE_SEGMENTS &&
376  !(hls->flags & HLS_SINGLE_FILE || hls->wrap)) {
377  en->next = hls->old_segments;
378  hls->old_segments = en;
379  if ((ret = hls_delete_old_segments(hls)) < 0)
380  return ret;
381  } else
382  av_free(en);
383  } else
384  hls->nb_entries++;
385 
386  hls->sequence++;
387 
388  return 0;
389 }
390 
392 {
393  HLSSegment *en;
394 
395  while(p) {
396  en = p;
397  p = p->next;
398  av_free(en);
399  }
400 }
401 
403 {
404  if (c->method)
405  av_dict_set(options, "method", c->method, 0);
406 }
407 
408 static int hls_window(AVFormatContext *s, int last)
409 {
410  HLSContext *hls = s->priv_data;
411  HLSSegment *en;
412  int target_duration = 0;
413  int ret = 0;
414  AVIOContext *out = NULL;
415  AVIOContext *sub_out = NULL;
416  char temp_filename[1024];
417  int64_t sequence = FFMAX(hls->start_sequence, hls->sequence - hls->nb_entries);
418  int version = hls->flags & HLS_SINGLE_FILE ? 4 : 3;
419  const char *proto = avio_find_protocol_name(s->filename);
420  int use_rename = proto && !strcmp(proto, "file");
421  static unsigned warned_non_file;
422  char *key_uri = NULL;
423  char *iv_string = NULL;
425 
426  if (!use_rename && !warned_non_file++)
427  av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporarly partial files\n");
428 
429  set_http_options(&options, hls);
430  snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
431  if ((ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, &options)) < 0)
432  goto fail;
433 
434  for (en = hls->segments; en; en = en->next) {
435  if (target_duration < en->duration)
436  target_duration = ceil(en->duration);
437  }
438 
439  hls->discontinuity_set = 0;
440  avio_printf(out, "#EXTM3U\n");
441  avio_printf(out, "#EXT-X-VERSION:%d\n", version);
442  if (hls->allowcache == 0 || hls->allowcache == 1) {
443  avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
444  }
445  avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
446  avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
447  if (hls->pl_type == PLAYLIST_TYPE_EVENT) {
448  avio_printf(out, "#EXT-X-PLAYLIST-TYPE:EVENT\n");
449  } else if (hls->pl_type == PLAYLIST_TYPE_VOD) {
450  avio_printf(out, "#EXT-X-PLAYLIST-TYPE:VOD\n");
451  }
452 
453  av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
454  sequence);
455  if((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && hls->discontinuity_set==0 ){
456  avio_printf(out, "#EXT-X-DISCONTINUITY\n");
457  hls->discontinuity_set = 1;
458  }
459  for (en = hls->segments; en; en = en->next) {
460  if (hls->key_info_file && (!key_uri || strcmp(en->key_uri, key_uri) ||
461  av_strcasecmp(en->iv_string, iv_string))) {
462  avio_printf(out, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"", en->key_uri);
463  if (*en->iv_string)
464  avio_printf(out, ",IV=0x%s", en->iv_string);
465  avio_printf(out, "\n");
466  key_uri = en->key_uri;
467  iv_string = en->iv_string;
468  }
469 
470  if (hls->flags & HLS_ROUND_DURATIONS)
471  avio_printf(out, "#EXTINF:%ld,\n", lrint(en->duration));
472  else
473  avio_printf(out, "#EXTINF:%f,\n", en->duration);
474  if (hls->flags & HLS_SINGLE_FILE)
475  avio_printf(out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
476  en->size, en->pos);
477  if (hls->baseurl)
478  avio_printf(out, "%s", hls->baseurl);
479  avio_printf(out, "%s\n", en->filename);
480  }
481 
482  if (last && (hls->flags & HLS_OMIT_ENDLIST)==0)
483  avio_printf(out, "#EXT-X-ENDLIST\n");
484 
485  if( hls->vtt_m3u8_name ) {
486  if ((ret = s->io_open(s, &sub_out, hls->vtt_m3u8_name, AVIO_FLAG_WRITE, &options)) < 0)
487  goto fail;
488  avio_printf(sub_out, "#EXTM3U\n");
489  avio_printf(sub_out, "#EXT-X-VERSION:%d\n", version);
490  if (hls->allowcache == 0 || hls->allowcache == 1) {
491  avio_printf(sub_out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
492  }
493  avio_printf(sub_out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
494  avio_printf(sub_out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
495 
496  av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
497  sequence);
498 
499  for (en = hls->segments; en; en = en->next) {
500  avio_printf(sub_out, "#EXTINF:%f,\n", en->duration);
501  if (hls->flags & HLS_SINGLE_FILE)
502  avio_printf(sub_out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
503  en->size, en->pos);
504  if (hls->baseurl)
505  avio_printf(sub_out, "%s", hls->baseurl);
506  avio_printf(sub_out, "%s\n", en->sub_filename);
507  }
508 
509  if (last)
510  avio_printf(sub_out, "#EXT-X-ENDLIST\n");
511 
512  }
513 
514 fail:
515  av_dict_free(&options);
516  ff_format_io_close(s, &out);
517  ff_format_io_close(s, &sub_out);
518  if (ret >= 0 && use_rename)
519  ff_rename(temp_filename, s->filename, s);
520  return ret;
521 }
522 
524 {
525  HLSContext *c = s->priv_data;
526  AVFormatContext *oc = c->avf;
527  AVFormatContext *vtt_oc = c->vtt_avf;
529  char *filename, iv_string[KEYSIZE*2 + 1];
530  int err = 0;
531 
532  if (c->flags & HLS_SINGLE_FILE) {
533  av_strlcpy(oc->filename, c->basename,
534  sizeof(oc->filename));
535  if (c->vtt_basename)
536  av_strlcpy(vtt_oc->filename, c->vtt_basename,
537  sizeof(vtt_oc->filename));
538  } else {
539  if (c->use_localtime) {
540  time_t now0;
541  struct tm *tm, tmpbuf;
542  time(&now0);
543  tm = localtime_r(&now0, &tmpbuf);
544  if (!strftime(oc->filename, sizeof(oc->filename), c->basename, tm)) {
545  av_log(oc, AV_LOG_ERROR, "Could not get segment filename with use_localtime\n");
546  return AVERROR(EINVAL);
547  }
548 
549  if (c->use_localtime_mkdir) {
550  const char *dir;
551  char *fn_copy = av_strdup(oc->filename);
552  if (!fn_copy) {
553  return AVERROR(ENOMEM);
554  }
555  dir = av_dirname(fn_copy);
556  if (mkdir(dir, 0777) == -1 && errno != EEXIST) {
557  av_log(oc, AV_LOG_ERROR, "Could not create directory %s with use_localtime_mkdir\n", dir);
558  av_free(fn_copy);
559  return AVERROR(errno);
560  }
561  av_free(fn_copy);
562  }
563  } else if (av_get_frame_filename(oc->filename, sizeof(oc->filename),
564  c->basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
565  av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try use -use_localtime 1 with it\n", c->basename);
566  return AVERROR(EINVAL);
567  }
568  if( c->vtt_basename) {
569  if (av_get_frame_filename(vtt_oc->filename, sizeof(vtt_oc->filename),
570  c->vtt_basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
571  av_log(vtt_oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", c->vtt_basename);
572  return AVERROR(EINVAL);
573  }
574  }
575  }
576  c->number++;
577 
578  set_http_options(&options, c);
579 
580  if (c->key_info_file) {
581  if ((err = hls_encryption_start(s)) < 0)
582  goto fail;
583  if ((err = av_dict_set(&options, "encryption_key", c->key_string, 0))
584  < 0)
585  goto fail;
586  err = av_strlcpy(iv_string, c->iv_string, sizeof(iv_string));
587  if (!err)
588  snprintf(iv_string, sizeof(iv_string), "%032"PRIx64, c->sequence);
589  if ((err = av_dict_set(&options, "encryption_iv", iv_string, 0)) < 0)
590  goto fail;
591 
592  filename = av_asprintf("crypto:%s", oc->filename);
593  if (!filename) {
594  err = AVERROR(ENOMEM);
595  goto fail;
596  }
597  err = s->io_open(s, &oc->pb, filename, AVIO_FLAG_WRITE, &options);
598  av_free(filename);
599  av_dict_free(&options);
600  if (err < 0)
601  return err;
602  } else
603  if ((err = s->io_open(s, &oc->pb, oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
604  goto fail;
605  if (c->vtt_basename) {
606  set_http_options(&options, c);
607  if ((err = s->io_open(s, &vtt_oc->pb, vtt_oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
608  goto fail;
609  }
610  av_dict_free(&options);
611 
612  /* We only require one PAT/PMT per segment. */
613  if (oc->oformat->priv_class && oc->priv_data) {
614  char period[21];
615 
616  snprintf(period, sizeof(period), "%d", (INT_MAX / 2) - 1);
617 
618  av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0);
619  av_opt_set(oc->priv_data, "sdt_period", period, 0);
620  av_opt_set(oc->priv_data, "pat_period", period, 0);
621  }
622 
623  if (c->vtt_basename) {
624  err = avformat_write_header(vtt_oc,NULL);
625  if (err < 0)
626  return err;
627  }
628 
629  return 0;
630 fail:
631  av_dict_free(&options);
632 
633  return err;
634 }
635 
637 {
638  HLSContext *hls = s->priv_data;
639  int ret, i;
640  char *p;
641  const char *pattern = "%d.ts";
642  const char *pattern_localtime_fmt = "-%s.ts";
643  const char *vtt_pattern = "%d.vtt";
645  int basename_size;
646  int vtt_basename_size;
647 
648  hls->sequence = hls->start_sequence;
649  hls->recording_time = hls->time * AV_TIME_BASE;
650  hls->start_pts = AV_NOPTS_VALUE;
651 
652  if (hls->format_options_str) {
653  ret = av_dict_parse_string(&hls->format_options, hls->format_options_str, "=", ":", 0);
654  if (ret < 0) {
655  av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", hls->format_options_str);
656  goto fail;
657  }
658  }
659 
660  for (i = 0; i < s->nb_streams; i++) {
661  hls->has_video +=
663  hls->has_subtitle +=
665  }
666 
667  if (hls->has_video > 1)
669  "More than a single video stream present, "
670  "expect issues decoding it.\n");
671 
672  hls->oformat = av_guess_format("mpegts", NULL, NULL);
673 
674  if (!hls->oformat) {
676  goto fail;
677  }
678 
679  if(hls->has_subtitle) {
680  hls->vtt_oformat = av_guess_format("webvtt", NULL, NULL);
681  if (!hls->oformat) {
683  goto fail;
684  }
685  }
686 
687  if (hls->segment_filename) {
688  hls->basename = av_strdup(hls->segment_filename);
689  if (!hls->basename) {
690  ret = AVERROR(ENOMEM);
691  goto fail;
692  }
693  } else {
694  if (hls->flags & HLS_SINGLE_FILE)
695  pattern = ".ts";
696 
697  if (hls->use_localtime) {
698  basename_size = strlen(s->filename) + strlen(pattern_localtime_fmt) + 1;
699  } else {
700  basename_size = strlen(s->filename) + strlen(pattern) + 1;
701  }
702  hls->basename = av_malloc(basename_size);
703  if (!hls->basename) {
704  ret = AVERROR(ENOMEM);
705  goto fail;
706  }
707 
708  av_strlcpy(hls->basename, s->filename, basename_size);
709 
710  p = strrchr(hls->basename, '.');
711  if (p)
712  *p = '\0';
713  if (hls->use_localtime) {
714  av_strlcat(hls->basename, pattern_localtime_fmt, basename_size);
715  } else {
716  av_strlcat(hls->basename, pattern, basename_size);
717  }
718  }
719 
720  if(hls->has_subtitle) {
721 
722  if (hls->flags & HLS_SINGLE_FILE)
723  vtt_pattern = ".vtt";
724  vtt_basename_size = strlen(s->filename) + strlen(vtt_pattern) + 1;
725  hls->vtt_basename = av_malloc(vtt_basename_size);
726  if (!hls->vtt_basename) {
727  ret = AVERROR(ENOMEM);
728  goto fail;
729  }
730  hls->vtt_m3u8_name = av_malloc(vtt_basename_size);
731  if (!hls->vtt_m3u8_name ) {
732  ret = AVERROR(ENOMEM);
733  goto fail;
734  }
735  av_strlcpy(hls->vtt_basename, s->filename, vtt_basename_size);
736  p = strrchr(hls->vtt_basename, '.');
737  if (p)
738  *p = '\0';
739 
740  if( hls->subtitle_filename ) {
741  strcpy(hls->vtt_m3u8_name, hls->subtitle_filename);
742  } else {
743  strcpy(hls->vtt_m3u8_name, hls->vtt_basename);
744  av_strlcat(hls->vtt_m3u8_name, "_vtt.m3u8", vtt_basename_size);
745  }
746  av_strlcat(hls->vtt_basename, vtt_pattern, vtt_basename_size);
747  }
748 
749  if ((ret = hls_mux_init(s)) < 0)
750  goto fail;
751 
752  if ((ret = hls_start(s)) < 0)
753  goto fail;
754 
755  av_dict_copy(&options, hls->format_options, 0);
756  ret = avformat_write_header(hls->avf, &options);
757  if (av_dict_count(options)) {
758  av_log(s, AV_LOG_ERROR, "Some of provided format options in '%s' are not recognized\n", hls->format_options_str);
759  ret = AVERROR(EINVAL);
760  goto fail;
761  }
762  //av_assert0(s->nb_streams == hls->avf->nb_streams);
763  for (i = 0; i < s->nb_streams; i++) {
764  AVStream *inner_st;
765  AVStream *outer_st = s->streams[i];
766  if (outer_st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
767  inner_st = hls->avf->streams[i];
768  else if (hls->vtt_avf)
769  inner_st = hls->vtt_avf->streams[0];
770  else {
771  /* We have a subtitle stream, when the user does not want one */
772  inner_st = NULL;
773  continue;
774  }
775  avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
776  }
777 fail:
778 
779  av_dict_free(&options);
780  if (ret < 0) {
781  av_freep(&hls->basename);
782  av_freep(&hls->vtt_basename);
783  if (hls->avf)
785  if (hls->vtt_avf)
787 
788  }
789  return ret;
790 }
791 
793 {
794  HLSContext *hls = s->priv_data;
795  AVFormatContext *oc = NULL;
796  AVStream *st = s->streams[pkt->stream_index];
797  int64_t end_pts = hls->recording_time * hls->number;
798  int is_ref_pkt = 1;
799  int ret, can_split = 1;
800  int stream_index = 0;
801 
803  oc = hls->vtt_avf;
804  stream_index = 0;
805  } else {
806  oc = hls->avf;
807  stream_index = pkt->stream_index;
808  }
809  if (hls->start_pts == AV_NOPTS_VALUE) {
810  hls->start_pts = pkt->pts;
811  hls->end_pts = pkt->pts;
812  }
813 
814  if (hls->has_video) {
815  can_split = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
816  pkt->flags & AV_PKT_FLAG_KEY;
817  is_ref_pkt = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
818  }
819  if (pkt->pts == AV_NOPTS_VALUE)
820  is_ref_pkt = can_split = 0;
821 
822  if (is_ref_pkt)
823  hls->duration = (double)(pkt->pts - hls->end_pts)
824  * st->time_base.num / st->time_base.den;
825 
826  if (can_split && av_compare_ts(pkt->pts - hls->start_pts, st->time_base,
827  end_pts, AV_TIME_BASE_Q) >= 0) {
828  int64_t new_start_pos;
829  av_write_frame(oc, NULL); /* Flush any buffered data */
830 
831  new_start_pos = avio_tell(hls->avf->pb);
832  hls->size = new_start_pos - hls->start_pos;
833  ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
834  hls->start_pos = new_start_pos;
835  if (ret < 0)
836  return ret;
837 
838  hls->end_pts = pkt->pts;
839  hls->duration = 0;
840 
841  if (hls->flags & HLS_SINGLE_FILE) {
842  if (hls->avf->oformat->priv_class && hls->avf->priv_data)
843  av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
844  hls->number++;
845  } else {
846  ff_format_io_close(s, &oc->pb);
847  if (hls->vtt_avf)
848  ff_format_io_close(s, &hls->vtt_avf->pb);
849 
850  ret = hls_start(s);
851  }
852 
853  if (ret < 0)
854  return ret;
855 
857  oc = hls->vtt_avf;
858  else
859  oc = hls->avf;
860 
861  if ((ret = hls_window(s, 0)) < 0)
862  return ret;
863  }
864 
865  ret = ff_write_chained(oc, stream_index, pkt, s, 0);
866 
867  return ret;
868 }
869 
871 {
872  HLSContext *hls = s->priv_data;
873  AVFormatContext *oc = hls->avf;
874  AVFormatContext *vtt_oc = hls->vtt_avf;
875 
876  av_write_trailer(oc);
877  if (oc->pb) {
878  hls->size = avio_tell(hls->avf->pb) - hls->start_pos;
879  ff_format_io_close(s, &oc->pb);
880  hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
881  }
882 
883  if (vtt_oc) {
884  if (vtt_oc->pb)
885  av_write_trailer(vtt_oc);
886  hls->size = avio_tell(hls->vtt_avf->pb) - hls->start_pos;
887  ff_format_io_close(s, &vtt_oc->pb);
888  }
889  av_freep(&hls->basename);
891 
892  if (vtt_oc) {
893  av_freep(&hls->vtt_basename);
894  av_freep(&hls->vtt_m3u8_name);
895  avformat_free_context(vtt_oc);
896  }
897 
898  hls->avf = NULL;
899  hls_window(s, 1);
900 
903  return 0;
904 }
905 
906 #define OFFSET(x) offsetof(HLSContext, x)
907 #define E AV_OPT_FLAG_ENCODING_PARAM
908 static const AVOption options[] = {
909  {"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
910  {"hls_time", "set segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E},
911  {"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
912  {"hls_ts_options","set hls mpegts list of options for the container format used for hls", OFFSET(format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
913  {"hls_vtt_options","set hls vtt list of options for the container format used for hls", OFFSET(vtt_format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
914  {"hls_wrap", "set number after which the index wraps", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
915  {"hls_allow_cache", "explicitly set whether the client MAY (1) or MUST NOT (0) cache media segments", OFFSET(allowcache), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, E},
916  {"hls_base_url", "url to prepend to each playlist entry", OFFSET(baseurl), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
917  {"hls_segment_filename", "filename template for segment files", OFFSET(segment_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
918  {"hls_key_info_file", "file with key URI and key file path", OFFSET(key_info_file), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
919  {"hls_subtitle_path", "set path of hls subtitles", OFFSET(subtitle_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
920  {"hls_flags", "set flags affecting HLS playlist and media file generation", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0 }, 0, UINT_MAX, E, "flags"},
921  {"single_file", "generate a single media file indexed with byte ranges", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SINGLE_FILE }, 0, UINT_MAX, E, "flags"},
922  {"delete_segments", "delete segment files that are no longer part of the playlist", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DELETE_SEGMENTS }, 0, UINT_MAX, E, "flags"},
923  {"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, "flags"},
924  {"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, "flags"},
925  {"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, "flags"},
926  {"use_localtime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
927  {"use_localtime_mkdir", "create last directory component in strftime-generated filename", OFFSET(use_localtime_mkdir), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
928  {"hls_playlist_type", "set the HLS playlist type", OFFSET(pl_type), AV_OPT_TYPE_INT, {.i64 = PLAYLIST_TYPE_NONE }, 0, PLAYLIST_TYPE_NB-1, E, "pl_type" },
929  {"event", "EVENT playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_EVENT }, INT_MIN, INT_MAX, E, "pl_type" },
930  {"vod", "VOD playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_VOD }, INT_MIN, INT_MAX, E, "pl_type" },
931  {"method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
932 
933  { NULL },
934 };
935 
936 static const AVClass hls_class = {
937  .class_name = "hls muxer",
938  .item_name = av_default_item_name,
939  .option = options,
940  .version = LIBAVUTIL_VERSION_INT,
941 };
942 
943 
945  .name = "hls",
946  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
947  .extensions = "m3u8",
948  .priv_data_size = sizeof(HLSContext),
949  .audio_codec = AV_CODEC_ID_AAC,
950  .video_codec = AV_CODEC_ID_H264,
951  .subtitle_codec = AV_CODEC_ID_WEBVTT,
956  .priv_class = &hls_class,
957 };
float time
Definition: hlsenc.c:85
#define NULL
Definition: coverity.c:32
int wrap
Definition: hlsenc.c:87
char key_uri[LINE_BUFFER_SIZE+1]
Definition: hlsenc.c:121
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:111
char * basename
Definition: hlsenc.c:110
PlaylistType
Definition: hlsenc.c:67
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1571
AVOption.
Definition: opt.h:245
static int hls_write_trailer(struct AVFormatContext *s)
Definition: hlsenc.c:870
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:805
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
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:4404
double duration
Definition: hlsenc.c:48
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:1189
char * vtt_format_options_str
Definition: hlsenc.c:115
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:943
int64_t size
Definition: hlsenc.c:50
int num
numerator
Definition: rational.h:44
int use_localtime_mkdir
flag to mkdir dirname in timebased filename
Definition: hlsenc.c:93
int av_dict_count(const AVDictionary *m)
Get number of entries in dictionary.
Definition: dict.c:34
#define AVIO_FLAG_READ
read-only
Definition: avio.h:542
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:543
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:216
int version
Definition: avisynth_c.h:629
static AVPacket pkt
#define AVFMT_ALLOW_FLUSH
Format allows flushing.
Definition: avformat.h:493
static int hls_window(AVFormatContext *s, int last)
Definition: hlsenc.c:408
static void set_http_options(AVDictionary **options, HLSContext *c)
Definition: hlsenc.c:402
Format I/O context.
Definition: avformat.h:1319
int max_nb_segments
Definition: hlsenc.c:86
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
const char * av_basename(const char *path)
Thread safe basename.
Definition: avstring.c:234
uint8_t
static int hls_append_segment(struct AVFormatContext *s, HLSContext *hls, double duration, int64_t pos, int64_t size)
Definition: hlsenc.c:316
#define av_malloc(s)
AVOptions.
miscellaneous OS support macros and functions.
static void hls_free_segments(HLSSegment *p)
Definition: hlsenc.c:391
HLSSegment * old_segments
Definition: hlsenc.c:108
int64_t end_pts
Definition: hlsenc.c:99
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5044
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4042
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1387
#define AVERROR_EOF
End of file.
Definition: error.h:55
char * format_options_str
Definition: hlsenc.c:114
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
#define LINE_BUFFER_SIZE
Definition: hlsenc.c:43
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:447
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:550
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1338
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1609
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
static const AVOption options[]
Definition: hlsenc.c:908
static int hls_write_header(AVFormatContext *s)
Definition: hlsenc.c:636
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:4052
#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:1533
#define OFFSET(x)
Definition: hlsenc.c:906
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
struct HLSSegment * next
Definition: hlsenc.c:55
#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
char sub_filename[1024]
Definition: hlsenc.c:47
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:3911
AVDictionary * vtt_format_options
Definition: hlsenc.c:124
#define wrap(func)
Definition: neontest.h:65
simple assert() macros that are a bit more flexible than ISO C assert().
int has_video
Definition: hlsenc.c:96
double duration
Definition: hlsenc.c:100
char key_uri[LINE_BUFFER_SIZE+1]
Definition: hlsenc.c:52
int64_t recording_time
Definition: hlsenc.c:95
#define FFMAX(a, b)
Definition: common.h:94
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:81
int64_t pos
Definition: hlsenc.c:49
char * vtt_basename
Definition: hlsenc.c:111
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1583
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:1799
char * baseurl
Definition: hlsenc.c:113
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
Definition: hls.c:67
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1375
int discontinuity_set
Definition: hlsenc.c:104
unsigned number
Definition: hlsenc.c:76
char key_string[KEYSIZE *2+1]
Definition: hlsenc.c:122
char filename[1024]
input or output filename
Definition: avformat.h:1395
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:246
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:476
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:213
static struct tm * localtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:37
static uint8_t tmp[8]
Definition: des-test.c:38
int64_t start_pts
Definition: hlsenc.c:98
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hlsenc.c:792
const char * name
Definition: avformat.h:522
int64_t duration
Definition: movenc-test.c:63
HLSSegment * last_segment
Definition: hlsenc.c:107
#define E
Definition: hlsenc.c:907
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:94
HLSSegment * segments
Definition: hlsenc.c:106
AVDictionary * format_options
Definition: hlsenc.c:117
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:711
const AVClass * priv_class
AVClass for the private context.
Definition: avformat.h:550
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:4229
static int hls_delete_old_segments(HLSContext *hls)
Definition: hlsenc.c:130
int use_localtime
flag to expand filename with localtime
Definition: hlsenc.c:92
FILE * out
Definition: movenc-test.c:54
Stream structure.
Definition: avformat.h:876
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 iv_string[KEYSIZE *2+1]
Definition: hlsenc.c:53
int64_t start_sequence
Definition: hlsenc.c:78
int has_subtitle
Definition: hlsenc.c:97
#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
AVIOContext * pb
I/O context.
Definition: avformat.h:1361
static int hls_encryption_start(AVFormatContext *s)
Definition: hlsenc.c:215
char * key_info_file
Definition: hlsenc.c:119
AVOutputFormat * oformat
Definition: hlsenc.c:79
char * method
Definition: hlsenc.c:126
int allowcache
Definition: hlsenc.c:94
HLSFlags
Definition: hlsenc.c:58
static int ff_rename(const char *oldpath, const char *newpath, void *logctx)
Wrap errno on rename() error.
Definition: internal.h:498
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
Describe the class of an AVClass context structure.
Definition: log.h:67
char iv_string[KEYSIZE *2+1]
Definition: hlsenc.c:123
#define snprintf
Definition: snprintf.h:34
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:3978
int64_t sequence
Definition: hlsenc.c:77
misc parsing utilities
size_t av_strlcat(char *dst, const char *src, size_t size)
Append the string src to the string dst, but to a total length of no more than size - 1 bytes...
Definition: avstring.c:93
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
char key_file[LINE_BUFFER_SIZE+1]
Definition: hlsenc.c:120
static int flags
Definition: cpu.c:47
static int hls_mux_init(AVFormatContext *s)
Definition: hlsenc.c:267
int64_t size
Definition: hlsenc.c:102
uint32_t pl_type
Definition: hlsenc.c:89
int nb_entries
Definition: hlsenc.c:103
Main libavformat public API header.
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:476
static double c[64]
const char * av_dirname(char *path)
Thread safe dirname.
Definition: avstring.c:251
uint32_t flags
Definition: hlsenc.c:88
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1048
int den
denominator
Definition: rational.h:45
#define KEYSIZE
Definition: hlsenc.c:42
int64_t start_pos
Definition: hlsenc.c:101
char * segment_filename
Definition: hlsenc.c:90
#define av_free(p)
char * vtt_m3u8_name
Definition: hlsenc.c:112
char filename[1024]
Definition: hlsenc.c:46
static int hls_start(AVFormatContext *s)
Definition: hlsenc.c:523
void * priv_data
Format private data.
Definition: avformat.h:1347
char * subtitle_filename
Definition: hlsenc.c:116
static const uint8_t start_sequence[]
Definition: rtpdec_h264.c:65
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:497
#define lrint
Definition: tablegen.h:53
AVFormatContext * avf
Definition: hlsenc.c:82
AVOutputFormat ff_hls_muxer
Definition: hlsenc.c:944
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1120
#define av_freep(p)
#define AVERROR_MUXER_NOT_FOUND
Muxer not found.
Definition: error.h:60
AVCodecParameters * codecpar
Definition: avformat.h:1006
AVOutputFormat * vtt_oformat
Definition: hlsenc.c:80
int stream_index
Definition: avcodec.h:1579
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:913
static const AVClass hls_class
Definition: hlsenc.c:936
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
Definition: avformat.h:1877
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4355
This structure stores compressed data.
Definition: avcodec.h:1554
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:1883
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1570
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
AVFormatContext * vtt_avf
Definition: hlsenc.c:83