2 * Apple HTTP Live Streaming segmenter
3 * Copyright (c) 2012, Luca Barbato
5 * This file is part of FFmpeg.
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.
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.
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
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"
35 #include "libavutil/time_internal.h"
39 #include "os_support.h"
42 #define LINE_BUFFER_SIZE 1024
44 typedef struct HLSSegment {
46 char sub_filename[1024];
47 double duration; /* in seconds */
51 char key_uri[LINE_BUFFER_SIZE + 1];
52 char iv_string[KEYSIZE*2 + 1];
54 struct HLSSegment *next;
57 typedef enum HLSFlags {
58 // Generate a single media file and use byte ranges in the playlist.
59 HLS_SINGLE_FILE = (1 << 0),
60 HLS_DELETE_SEGMENTS = (1 << 1),
61 HLS_ROUND_DURATIONS = (1 << 2),
62 HLS_DISCONT_START = (1 << 3),
63 HLS_OMIT_ENDLIST = (1 << 4),
66 typedef struct HLSContext {
67 const AVClass *class; // Class for private options.
70 int64_t start_sequence;
71 AVOutputFormat *oformat;
72 AVOutputFormat *vtt_oformat;
75 AVFormatContext *vtt_avf;
77 float time; // Set by a private option.
78 int max_nb_segments; // Set by a private option.
79 int wrap; // Set by a private option.
80 uint32_t flags; // enum HLSFlags
81 char *segment_filename;
83 int use_localtime; ///< flag to expand filename with localtime
85 int64_t recording_time;
90 double duration; // last segment duration computed so far, in seconds
91 int64_t start_pos; // last segment starting position
92 int64_t size; // last segment size
94 int discontinuity_set;
97 HLSSegment *last_segment;
98 HLSSegment *old_segments;
104 char *format_options_str;
105 char *vtt_format_options_str;
106 char *subtitle_filename;
107 AVDictionary *format_options;
110 char key_file[LINE_BUFFER_SIZE + 1];
111 char key_uri[LINE_BUFFER_SIZE + 1];
112 char key_string[KEYSIZE*2 + 1];
113 char iv_string[KEYSIZE*2 + 1];
114 AVDictionary *vtt_format_options;
118 static int hls_delete_old_segments(HLSContext *hls) {
120 HLSSegment *segment, *previous_segment = NULL;
121 float playlist_duration = 0.0f;
122 int ret = 0, path_size, sub_path_size;
123 char *dirname = NULL, *p, *sub_path;
126 segment = hls->segments;
128 playlist_duration += segment->duration;
129 segment = segment->next;
132 segment = hls->old_segments;
134 playlist_duration -= segment->duration;
135 previous_segment = segment;
136 segment = previous_segment->next;
137 if (playlist_duration <= -previous_segment->duration) {
138 previous_segment->next = NULL;
144 if (hls->segment_filename) {
145 dirname = av_strdup(hls->segment_filename);
147 dirname = av_strdup(hls->avf->filename);
150 ret = AVERROR(ENOMEM);
153 p = (char *)av_basename(dirname);
158 av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n",
160 path_size = strlen(dirname) + strlen(segment->filename) + 1;
161 path = av_malloc(path_size);
163 ret = AVERROR(ENOMEM);
166 sub_path_size = strlen(dirname) + strlen(segment->sub_filename) + 1;
167 sub_path = av_malloc(sub_path_size);
169 ret = AVERROR(ENOMEM);
173 av_strlcpy(path, dirname, path_size);
174 av_strlcat(path, segment->filename, path_size);
175 if (unlink(path) < 0) {
176 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
177 path, strerror(errno));
180 av_strlcpy(sub_path, dirname, sub_path_size);
181 av_strlcat(sub_path, segment->sub_filename, sub_path_size);
182 if (unlink(sub_path) < 0) {
183 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
184 sub_path, strerror(errno));
188 previous_segment = segment;
189 segment = previous_segment->next;
190 av_free(previous_segment);
200 static int hls_encryption_start(AVFormatContext *s)
202 HLSContext *hls = s->priv_data;
205 uint8_t key[KEYSIZE];
207 if ((ret = avio_open2(&pb, hls->key_info_file, AVIO_FLAG_READ,
208 &s->interrupt_callback, NULL)) < 0) {
209 av_log(hls, AV_LOG_ERROR,
210 "error opening key info file %s\n", hls->key_info_file);
214 ff_get_line(pb, hls->key_uri, sizeof(hls->key_uri));
215 hls->key_uri[strcspn(hls->key_uri, "\r\n")] = '\0';
217 ff_get_line(pb, hls->key_file, sizeof(hls->key_file));
218 hls->key_file[strcspn(hls->key_file, "\r\n")] = '\0';
220 ff_get_line(pb, hls->iv_string, sizeof(hls->iv_string));
221 hls->iv_string[strcspn(hls->iv_string, "\r\n")] = '\0';
225 if (!*hls->key_uri) {
226 av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
227 return AVERROR(EINVAL);
230 if (!*hls->key_file) {
231 av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
232 return AVERROR(EINVAL);
235 if ((ret = avio_open2(&pb, hls->key_file, AVIO_FLAG_READ,
236 &s->interrupt_callback, NULL)) < 0) {
237 av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", hls->key_file);
241 ret = avio_read(pb, key, sizeof(key));
243 if (ret != sizeof(key)) {
244 av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", hls->key_file);
245 if (ret >= 0 || ret == AVERROR_EOF)
246 ret = AVERROR(EINVAL);
249 ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
254 static int hls_mux_init(AVFormatContext *s)
256 HLSContext *hls = s->priv_data;
258 AVFormatContext *vtt_oc = NULL;
261 ret = avformat_alloc_output_context2(&hls->avf, hls->oformat, NULL, NULL);
266 oc->oformat = hls->oformat;
267 oc->interrupt_callback = s->interrupt_callback;
268 oc->max_delay = s->max_delay;
269 av_dict_copy(&oc->metadata, s->metadata, 0);
271 if(hls->vtt_oformat) {
272 ret = avformat_alloc_output_context2(&hls->vtt_avf, hls->vtt_oformat, NULL, NULL);
275 vtt_oc = hls->vtt_avf;
276 vtt_oc->oformat = hls->vtt_oformat;
277 av_dict_copy(&vtt_oc->metadata, s->metadata, 0);
280 for (i = 0; i < s->nb_streams; i++) {
282 AVFormatContext *loc;
283 if (s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE)
288 if (!(st = avformat_new_stream(loc, NULL)))
289 return AVERROR(ENOMEM);
290 avcodec_copy_context(st->codec, s->streams[i]->codec);
291 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
292 st->time_base = s->streams[i]->time_base;
299 /* Create a new segment and append it to the segment list */
300 static int hls_append_segment(HLSContext *hls, double duration, int64_t pos,
303 HLSSegment *en = av_malloc(sizeof(*en));
307 return AVERROR(ENOMEM);
309 av_strlcpy(en->filename, av_basename(hls->avf->filename), sizeof(en->filename));
311 if(hls->has_subtitle)
312 av_strlcpy(en->sub_filename, av_basename(hls->vtt_avf->filename), sizeof(en->sub_filename));
314 en->duration = duration;
319 if (hls->key_info_file) {
320 av_strlcpy(en->key_uri, hls->key_uri, sizeof(en->key_uri));
321 av_strlcpy(en->iv_string, hls->iv_string, sizeof(en->iv_string));
327 hls->last_segment->next = en;
329 hls->last_segment = en;
331 if (hls->max_nb_segments && hls->nb_entries >= hls->max_nb_segments) {
333 hls->segments = en->next;
334 if (en && hls->flags & HLS_DELETE_SEGMENTS &&
335 !(hls->flags & HLS_SINGLE_FILE || hls->wrap)) {
336 en->next = hls->old_segments;
337 hls->old_segments = en;
338 if ((ret = hls_delete_old_segments(hls)) < 0)
350 static void hls_free_segments(HLSSegment *p)
361 static int hls_window(AVFormatContext *s, int last)
363 HLSContext *hls = s->priv_data;
365 int target_duration = 0;
367 AVIOContext *out = NULL;
368 AVIOContext *sub_out = NULL;
369 char temp_filename[1024];
370 int64_t sequence = FFMAX(hls->start_sequence, hls->sequence - hls->nb_entries);
371 int version = hls->flags & HLS_SINGLE_FILE ? 4 : 3;
372 const char *proto = avio_find_protocol_name(s->filename);
373 int use_rename = proto && !strcmp(proto, "file");
374 static unsigned warned_non_file;
375 char *key_uri = NULL;
376 char *iv_string = NULL;
378 if (!use_rename && !warned_non_file++)
379 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporarly partial files\n");
381 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
382 if ((ret = avio_open2(&out, temp_filename, AVIO_FLAG_WRITE,
383 &s->interrupt_callback, NULL)) < 0)
386 for (en = hls->segments; en; en = en->next) {
387 if (target_duration < en->duration)
388 target_duration = ceil(en->duration);
391 hls->discontinuity_set = 0;
392 avio_printf(out, "#EXTM3U\n");
393 avio_printf(out, "#EXT-X-VERSION:%d\n", version);
394 if (hls->allowcache == 0 || hls->allowcache == 1) {
395 avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
397 avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
398 avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
400 av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
402 if((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && hls->discontinuity_set==0 ){
403 avio_printf(out, "#EXT-X-DISCONTINUITY\n");
404 hls->discontinuity_set = 1;
406 for (en = hls->segments; en; en = en->next) {
407 if (hls->key_info_file && (!key_uri || strcmp(en->key_uri, key_uri) ||
408 av_strcasecmp(en->iv_string, iv_string))) {
409 avio_printf(out, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"", en->key_uri);
411 avio_printf(out, ",IV=0x%s", en->iv_string);
412 avio_printf(out, "\n");
413 key_uri = en->key_uri;
414 iv_string = en->iv_string;
417 if (hls->flags & HLS_ROUND_DURATIONS)
418 avio_printf(out, "#EXTINF:%d,\n", (int)round(en->duration));
420 avio_printf(out, "#EXTINF:%f,\n", en->duration);
421 if (hls->flags & HLS_SINGLE_FILE)
422 avio_printf(out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
425 avio_printf(out, "%s", hls->baseurl);
426 avio_printf(out, "%s\n", en->filename);
429 if (last && (hls->flags & HLS_OMIT_ENDLIST)==0)
430 avio_printf(out, "#EXT-X-ENDLIST\n");
432 if( hls->vtt_m3u8_name ) {
433 if ((ret = avio_open2(&sub_out, hls->vtt_m3u8_name, AVIO_FLAG_WRITE,
434 &s->interrupt_callback, NULL)) < 0)
436 avio_printf(sub_out, "#EXTM3U\n");
437 avio_printf(sub_out, "#EXT-X-VERSION:%d\n", version);
438 if (hls->allowcache == 0 || hls->allowcache == 1) {
439 avio_printf(sub_out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
441 avio_printf(sub_out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
442 avio_printf(sub_out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
444 av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
447 for (en = hls->segments; en; en = en->next) {
448 avio_printf(sub_out, "#EXTINF:%f,\n", en->duration);
449 if (hls->flags & HLS_SINGLE_FILE)
450 avio_printf(sub_out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
453 avio_printf(sub_out, "%s", hls->baseurl);
454 avio_printf(sub_out, "%s\n", en->sub_filename);
458 avio_printf(sub_out, "#EXT-X-ENDLIST\n");
464 avio_closep(&sub_out);
465 if (ret >= 0 && use_rename)
466 ff_rename(temp_filename, s->filename, s);
470 static int hls_start(AVFormatContext *s)
472 HLSContext *c = s->priv_data;
473 AVFormatContext *oc = c->avf;
474 AVFormatContext *vtt_oc = c->vtt_avf;
475 AVDictionary *options = NULL;
476 char *filename, iv_string[KEYSIZE*2 + 1];
479 if (c->flags & HLS_SINGLE_FILE) {
480 av_strlcpy(oc->filename, c->basename,
481 sizeof(oc->filename));
483 av_strlcpy(vtt_oc->filename, c->vtt_basename,
484 sizeof(vtt_oc->filename));
486 if (c->use_localtime) {
488 struct tm *tm, tmpbuf;
490 tm = localtime_r(&now0, &tmpbuf);
491 if (!strftime(oc->filename, sizeof(oc->filename), c->basename, tm)) {
492 av_log(oc, AV_LOG_ERROR, "Could not get segment filename with use_localtime\n");
493 return AVERROR(EINVAL);
495 } else if (av_get_frame_filename(oc->filename, sizeof(oc->filename),
496 c->basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
497 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try use -use_localtime 1 with it\n", c->basename);
498 return AVERROR(EINVAL);
500 if( c->vtt_basename) {
501 if (av_get_frame_filename(vtt_oc->filename, sizeof(vtt_oc->filename),
502 c->vtt_basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
503 av_log(vtt_oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", c->vtt_basename);
504 return AVERROR(EINVAL);
510 if (c->key_info_file) {
511 if ((err = hls_encryption_start(s)) < 0)
513 if ((err = av_dict_set(&options, "encryption_key", c->key_string, 0))
516 err = av_strlcpy(iv_string, c->iv_string, sizeof(iv_string));
518 snprintf(iv_string, sizeof(iv_string), "%032"PRIx64, c->sequence);
519 if ((err = av_dict_set(&options, "encryption_iv", iv_string, 0)) < 0)
522 filename = av_asprintf("crypto:%s", oc->filename);
524 av_dict_free(&options);
525 return AVERROR(ENOMEM);
527 err = avio_open2(&oc->pb, filename, AVIO_FLAG_WRITE,
528 &s->interrupt_callback, &options);
530 av_dict_free(&options);
534 if ((err = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
535 &s->interrupt_callback, NULL)) < 0)
537 if (c->vtt_basename) {
538 if ((err = avio_open2(&vtt_oc->pb, vtt_oc->filename, AVIO_FLAG_WRITE,
539 &s->interrupt_callback, NULL)) < 0)
543 if (oc->oformat->priv_class && oc->priv_data)
544 av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0);
547 avformat_write_header(vtt_oc,NULL);
552 static int hls_write_header(AVFormatContext *s)
554 HLSContext *hls = s->priv_data;
557 const char *pattern = "%d.ts";
558 const char *pattern_localtime_fmt = "-%s.ts";
559 const char *vtt_pattern = "%d.vtt";
560 AVDictionary *options = NULL;
562 int vtt_basename_size;
564 hls->sequence = hls->start_sequence;
565 hls->recording_time = hls->time * AV_TIME_BASE;
566 hls->start_pts = AV_NOPTS_VALUE;
568 if (hls->format_options_str) {
569 ret = av_dict_parse_string(&hls->format_options, hls->format_options_str, "=", ":", 0);
571 av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", hls->format_options_str);
576 for (i = 0; i < s->nb_streams; i++) {
578 s->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO;
580 s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE;
583 if (hls->has_video > 1)
584 av_log(s, AV_LOG_WARNING,
585 "More than a single video stream present, "
586 "expect issues decoding it.\n");
588 hls->oformat = av_guess_format("mpegts", NULL, NULL);
591 ret = AVERROR_MUXER_NOT_FOUND;
595 if(hls->has_subtitle) {
596 hls->vtt_oformat = av_guess_format("webvtt", NULL, NULL);
598 ret = AVERROR_MUXER_NOT_FOUND;
603 if (hls->segment_filename) {
604 hls->basename = av_strdup(hls->segment_filename);
605 if (!hls->basename) {
606 ret = AVERROR(ENOMEM);
610 if (hls->flags & HLS_SINGLE_FILE)
613 if (hls->use_localtime) {
614 basename_size = strlen(s->filename) + strlen(pattern_localtime_fmt) + 1;
616 basename_size = strlen(s->filename) + strlen(pattern) + 1;
618 hls->basename = av_malloc(basename_size);
619 if (!hls->basename) {
620 ret = AVERROR(ENOMEM);
624 av_strlcpy(hls->basename, s->filename, basename_size);
626 p = strrchr(hls->basename, '.');
629 if (hls->use_localtime) {
630 av_strlcat(hls->basename, pattern_localtime_fmt, basename_size);
632 av_strlcat(hls->basename, pattern, basename_size);
636 if(hls->has_subtitle) {
638 if (hls->flags & HLS_SINGLE_FILE)
639 vtt_pattern = ".vtt";
640 vtt_basename_size = strlen(s->filename) + strlen(vtt_pattern) + 1;
641 hls->vtt_basename = av_malloc(vtt_basename_size);
642 if (!hls->vtt_basename) {
643 ret = AVERROR(ENOMEM);
646 hls->vtt_m3u8_name = av_malloc(vtt_basename_size);
647 if (!hls->vtt_m3u8_name ) {
648 ret = AVERROR(ENOMEM);
651 av_strlcpy(hls->vtt_basename, s->filename, vtt_basename_size);
652 p = strrchr(hls->vtt_basename, '.');
656 if( hls->subtitle_filename ) {
657 strcpy(hls->vtt_m3u8_name, hls->subtitle_filename);
659 strcpy(hls->vtt_m3u8_name, hls->vtt_basename);
660 av_strlcat(hls->vtt_m3u8_name, "_vtt.m3u8", vtt_basename_size);
662 av_strlcat(hls->vtt_basename, vtt_pattern, vtt_basename_size);
665 if ((ret = hls_mux_init(s)) < 0)
668 if ((ret = hls_start(s)) < 0)
671 av_dict_copy(&options, hls->format_options, 0);
672 ret = avformat_write_header(hls->avf, &options);
673 if (av_dict_count(options)) {
674 av_log(s, AV_LOG_ERROR, "Some of provided format options in '%s' are not recognized\n", hls->format_options_str);
675 ret = AVERROR(EINVAL);
678 //av_assert0(s->nb_streams == hls->avf->nb_streams);
679 for (i = 0; i < s->nb_streams; i++) {
681 AVStream *outer_st = s->streams[i];
682 if (outer_st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
683 inner_st = hls->avf->streams[i];
684 else if (hls->vtt_avf)
685 inner_st = hls->vtt_avf->streams[0];
687 /* We have a subtitle stream, when the user does not want one */
691 avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
695 av_dict_free(&options);
697 av_freep(&hls->basename);
698 av_freep(&hls->vtt_basename);
700 avformat_free_context(hls->avf);
702 avformat_free_context(hls->vtt_avf);
708 static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
710 HLSContext *hls = s->priv_data;
711 AVFormatContext *oc = NULL;
712 AVStream *st = s->streams[pkt->stream_index];
713 int64_t end_pts = hls->recording_time * hls->number;
715 int ret, can_split = 1;
716 int stream_index = 0;
718 if( st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
723 stream_index = pkt->stream_index;
725 if (hls->start_pts == AV_NOPTS_VALUE) {
726 hls->start_pts = pkt->pts;
727 hls->end_pts = pkt->pts;
730 if (hls->has_video) {
731 can_split = st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
732 pkt->flags & AV_PKT_FLAG_KEY;
733 is_ref_pkt = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
735 if (pkt->pts == AV_NOPTS_VALUE)
736 is_ref_pkt = can_split = 0;
739 hls->duration = (double)(pkt->pts - hls->end_pts)
740 * st->time_base.num / st->time_base.den;
742 if (can_split && av_compare_ts(pkt->pts - hls->start_pts, st->time_base,
743 end_pts, AV_TIME_BASE_Q) >= 0) {
744 int64_t new_start_pos;
745 av_write_frame(oc, NULL); /* Flush any buffered data */
747 new_start_pos = avio_tell(hls->avf->pb);
748 hls->size = new_start_pos - hls->start_pos;
749 ret = hls_append_segment(hls, hls->duration, hls->start_pos, hls->size);
750 hls->start_pos = new_start_pos;
754 hls->end_pts = pkt->pts;
757 if (hls->flags & HLS_SINGLE_FILE) {
758 if (hls->avf->oformat->priv_class && hls->avf->priv_data)
759 av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
762 avio_closep(&oc->pb);
764 avio_close(hls->vtt_avf->pb);
772 if( st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE )
777 if ((ret = hls_window(s, 0)) < 0)
781 ret = ff_write_chained(oc, stream_index, pkt, s, 0);
786 static int hls_write_trailer(struct AVFormatContext *s)
788 HLSContext *hls = s->priv_data;
789 AVFormatContext *oc = hls->avf;
790 AVFormatContext *vtt_oc = hls->vtt_avf;
792 av_write_trailer(oc);
794 hls->size = avio_tell(hls->avf->pb) - hls->start_pos;
795 avio_closep(&oc->pb);
796 hls_append_segment(hls, hls->duration, hls->start_pos, hls->size);
801 av_write_trailer(vtt_oc);
802 hls->size = avio_tell(hls->vtt_avf->pb) - hls->start_pos;
803 avio_closep(&vtt_oc->pb);
805 av_freep(&hls->basename);
806 avformat_free_context(oc);
809 av_freep(&hls->vtt_basename);
810 av_freep(&hls->vtt_m3u8_name);
811 avformat_free_context(vtt_oc);
817 hls_free_segments(hls->segments);
818 hls_free_segments(hls->old_segments);
822 #define OFFSET(x) offsetof(HLSContext, x)
823 #define E AV_OPT_FLAG_ENCODING_PARAM
824 static const AVOption options[] = {
825 {"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
826 {"hls_time", "set segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E},
827 {"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
828 {"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},
829 {"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},
830 {"hls_wrap", "set number after which the index wraps", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
831 {"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},
832 {"hls_base_url", "url to prepend to each playlist entry", OFFSET(baseurl), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
833 {"hls_segment_filename", "filename template for segment files", OFFSET(segment_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
834 {"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},
835 {"hls_subtitle_path", "set path of hls subtitles", OFFSET(subtitle_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
836 {"hls_flags", "set flags affecting HLS playlist and media file generation", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0 }, 0, UINT_MAX, E, "flags"},
837 {"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"},
838 {"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"},
839 {"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, "flags"},
840 {"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, "flags"},
841 {"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, "flags"},
842 { "use_localtime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, E },
847 static const AVClass hls_class = {
848 .class_name = "hls muxer",
849 .item_name = av_default_item_name,
851 .version = LIBAVUTIL_VERSION_INT,
855 AVOutputFormat ff_hls_muxer = {
857 .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
858 .extensions = "m3u8",
859 .priv_data_size = sizeof(HLSContext),
860 .audio_codec = AV_CODEC_ID_AAC,
861 .video_codec = AV_CODEC_ID_H264,
862 .subtitle_codec = AV_CODEC_ID_WEBVTT,
863 .flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH,
864 .write_header = hls_write_header,
865 .write_packet = hls_write_packet,
866 .write_trailer = hls_write_trailer,
867 .priv_class = &hls_class,