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;
120 static int hls_delete_old_segments(HLSContext *hls) {
122 HLSSegment *segment, *previous_segment = NULL;
123 float playlist_duration = 0.0f;
124 int ret = 0, path_size, sub_path_size;
125 char *dirname = NULL, *p, *sub_path;
128 segment = hls->segments;
130 playlist_duration += segment->duration;
131 segment = segment->next;
134 segment = hls->old_segments;
136 playlist_duration -= segment->duration;
137 previous_segment = segment;
138 segment = previous_segment->next;
139 if (playlist_duration <= -previous_segment->duration) {
140 previous_segment->next = NULL;
146 if (hls->segment_filename) {
147 dirname = av_strdup(hls->segment_filename);
149 dirname = av_strdup(hls->avf->filename);
152 ret = AVERROR(ENOMEM);
155 p = (char *)av_basename(dirname);
160 av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n",
162 path_size = strlen(dirname) + strlen(segment->filename) + 1;
163 path = av_malloc(path_size);
165 ret = AVERROR(ENOMEM);
169 av_strlcpy(path, dirname, path_size);
170 av_strlcat(path, segment->filename, path_size);
171 if (unlink(path) < 0) {
172 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
173 path, strerror(errno));
176 if (segment->sub_filename[0] != '\0') {
177 sub_path_size = strlen(dirname) + strlen(segment->sub_filename) + 1;
178 sub_path = av_malloc(sub_path_size);
180 ret = AVERROR(ENOMEM);
184 av_strlcpy(sub_path, dirname, sub_path_size);
185 av_strlcat(sub_path, segment->sub_filename, sub_path_size);
186 if (unlink(sub_path) < 0) {
187 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
188 sub_path, strerror(errno));
193 previous_segment = segment;
194 segment = previous_segment->next;
195 av_free(previous_segment);
205 static int hls_encryption_start(AVFormatContext *s)
207 HLSContext *hls = s->priv_data;
210 uint8_t key[KEYSIZE];
212 if ((ret = avio_open2(&pb, hls->key_info_file, AVIO_FLAG_READ,
213 &s->interrupt_callback, NULL)) < 0) {
214 av_log(hls, AV_LOG_ERROR,
215 "error opening key info file %s\n", hls->key_info_file);
219 ff_get_line(pb, hls->key_uri, sizeof(hls->key_uri));
220 hls->key_uri[strcspn(hls->key_uri, "\r\n")] = '\0';
222 ff_get_line(pb, hls->key_file, sizeof(hls->key_file));
223 hls->key_file[strcspn(hls->key_file, "\r\n")] = '\0';
225 ff_get_line(pb, hls->iv_string, sizeof(hls->iv_string));
226 hls->iv_string[strcspn(hls->iv_string, "\r\n")] = '\0';
230 if (!*hls->key_uri) {
231 av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
232 return AVERROR(EINVAL);
235 if (!*hls->key_file) {
236 av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
237 return AVERROR(EINVAL);
240 if ((ret = avio_open2(&pb, hls->key_file, AVIO_FLAG_READ,
241 &s->interrupt_callback, NULL)) < 0) {
242 av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", hls->key_file);
246 ret = avio_read(pb, key, sizeof(key));
248 if (ret != sizeof(key)) {
249 av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", hls->key_file);
250 if (ret >= 0 || ret == AVERROR_EOF)
251 ret = AVERROR(EINVAL);
254 ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
259 static int hls_mux_init(AVFormatContext *s)
261 HLSContext *hls = s->priv_data;
263 AVFormatContext *vtt_oc = NULL;
266 ret = avformat_alloc_output_context2(&hls->avf, hls->oformat, NULL, NULL);
271 oc->oformat = hls->oformat;
272 oc->interrupt_callback = s->interrupt_callback;
273 oc->max_delay = s->max_delay;
274 av_dict_copy(&oc->metadata, s->metadata, 0);
276 if(hls->vtt_oformat) {
277 ret = avformat_alloc_output_context2(&hls->vtt_avf, hls->vtt_oformat, NULL, NULL);
280 vtt_oc = hls->vtt_avf;
281 vtt_oc->oformat = hls->vtt_oformat;
282 av_dict_copy(&vtt_oc->metadata, s->metadata, 0);
285 for (i = 0; i < s->nb_streams; i++) {
287 AVFormatContext *loc;
288 if (s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE)
293 if (!(st = avformat_new_stream(loc, NULL)))
294 return AVERROR(ENOMEM);
295 avcodec_copy_context(st->codec, s->streams[i]->codec);
296 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
297 st->time_base = s->streams[i]->time_base;
304 /* Create a new segment and append it to the segment list */
305 static int hls_append_segment(HLSContext *hls, double duration, int64_t pos,
308 HLSSegment *en = av_malloc(sizeof(*en));
312 return AVERROR(ENOMEM);
314 av_strlcpy(en->filename, av_basename(hls->avf->filename), sizeof(en->filename));
316 if(hls->has_subtitle)
317 av_strlcpy(en->sub_filename, av_basename(hls->vtt_avf->filename), sizeof(en->sub_filename));
319 en->sub_filename[0] = '\0';
321 en->duration = duration;
326 if (hls->key_info_file) {
327 av_strlcpy(en->key_uri, hls->key_uri, sizeof(en->key_uri));
328 av_strlcpy(en->iv_string, hls->iv_string, sizeof(en->iv_string));
334 hls->last_segment->next = en;
336 hls->last_segment = en;
338 if (hls->max_nb_segments && hls->nb_entries >= hls->max_nb_segments) {
340 hls->segments = en->next;
341 if (en && hls->flags & HLS_DELETE_SEGMENTS &&
342 !(hls->flags & HLS_SINGLE_FILE || hls->wrap)) {
343 en->next = hls->old_segments;
344 hls->old_segments = en;
345 if ((ret = hls_delete_old_segments(hls)) < 0)
357 static void hls_free_segments(HLSSegment *p)
368 static void set_http_options(AVDictionary **options, HLSContext *c)
371 av_dict_set(options, "method", c->method, 0);
374 static int hls_window(AVFormatContext *s, int last)
376 HLSContext *hls = s->priv_data;
378 int target_duration = 0;
380 AVIOContext *out = NULL;
381 AVIOContext *sub_out = NULL;
382 char temp_filename[1024];
383 int64_t sequence = FFMAX(hls->start_sequence, hls->sequence - hls->nb_entries);
384 int version = hls->flags & HLS_SINGLE_FILE ? 4 : 3;
385 const char *proto = avio_find_protocol_name(s->filename);
386 int use_rename = proto && !strcmp(proto, "file");
387 static unsigned warned_non_file;
388 char *key_uri = NULL;
389 char *iv_string = NULL;
390 AVDictionary *options = NULL;
392 if (!use_rename && !warned_non_file++)
393 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporarly partial files\n");
395 set_http_options(&options, hls);
396 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
397 if ((ret = avio_open2(&out, temp_filename, AVIO_FLAG_WRITE,
398 &s->interrupt_callback, &options)) < 0)
401 for (en = hls->segments; en; en = en->next) {
402 if (target_duration < en->duration)
403 target_duration = ceil(en->duration);
406 hls->discontinuity_set = 0;
407 avio_printf(out, "#EXTM3U\n");
408 avio_printf(out, "#EXT-X-VERSION:%d\n", version);
409 if (hls->allowcache == 0 || hls->allowcache == 1) {
410 avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
412 avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
413 avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
415 av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
417 if((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && hls->discontinuity_set==0 ){
418 avio_printf(out, "#EXT-X-DISCONTINUITY\n");
419 hls->discontinuity_set = 1;
421 for (en = hls->segments; en; en = en->next) {
422 if (hls->key_info_file && (!key_uri || strcmp(en->key_uri, key_uri) ||
423 av_strcasecmp(en->iv_string, iv_string))) {
424 avio_printf(out, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"", en->key_uri);
426 avio_printf(out, ",IV=0x%s", en->iv_string);
427 avio_printf(out, "\n");
428 key_uri = en->key_uri;
429 iv_string = en->iv_string;
432 if (hls->flags & HLS_ROUND_DURATIONS)
433 avio_printf(out, "#EXTINF:%d,\n", (int)round(en->duration));
435 avio_printf(out, "#EXTINF:%f,\n", en->duration);
436 if (hls->flags & HLS_SINGLE_FILE)
437 avio_printf(out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
440 avio_printf(out, "%s", hls->baseurl);
441 avio_printf(out, "%s\n", en->filename);
444 if (last && (hls->flags & HLS_OMIT_ENDLIST)==0)
445 avio_printf(out, "#EXT-X-ENDLIST\n");
447 if( hls->vtt_m3u8_name ) {
448 if ((ret = avio_open2(&sub_out, hls->vtt_m3u8_name, AVIO_FLAG_WRITE,
449 &s->interrupt_callback, &options)) < 0)
451 avio_printf(sub_out, "#EXTM3U\n");
452 avio_printf(sub_out, "#EXT-X-VERSION:%d\n", version);
453 if (hls->allowcache == 0 || hls->allowcache == 1) {
454 avio_printf(sub_out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
456 avio_printf(sub_out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
457 avio_printf(sub_out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
459 av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
462 for (en = hls->segments; en; en = en->next) {
463 avio_printf(sub_out, "#EXTINF:%f,\n", en->duration);
464 if (hls->flags & HLS_SINGLE_FILE)
465 avio_printf(sub_out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
468 avio_printf(sub_out, "%s", hls->baseurl);
469 avio_printf(sub_out, "%s\n", en->sub_filename);
473 avio_printf(sub_out, "#EXT-X-ENDLIST\n");
478 av_dict_free(&options);
480 avio_closep(&sub_out);
481 if (ret >= 0 && use_rename)
482 ff_rename(temp_filename, s->filename, s);
486 static int hls_start(AVFormatContext *s)
488 HLSContext *c = s->priv_data;
489 AVFormatContext *oc = c->avf;
490 AVFormatContext *vtt_oc = c->vtt_avf;
491 AVDictionary *options = NULL;
492 char *filename, iv_string[KEYSIZE*2 + 1];
495 if (c->flags & HLS_SINGLE_FILE) {
496 av_strlcpy(oc->filename, c->basename,
497 sizeof(oc->filename));
499 av_strlcpy(vtt_oc->filename, c->vtt_basename,
500 sizeof(vtt_oc->filename));
502 if (c->use_localtime) {
504 struct tm *tm, tmpbuf;
506 tm = localtime_r(&now0, &tmpbuf);
507 if (!strftime(oc->filename, sizeof(oc->filename), c->basename, tm)) {
508 av_log(oc, AV_LOG_ERROR, "Could not get segment filename with use_localtime\n");
509 return AVERROR(EINVAL);
511 } else if (av_get_frame_filename(oc->filename, sizeof(oc->filename),
512 c->basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
513 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try use -use_localtime 1 with it\n", c->basename);
514 return AVERROR(EINVAL);
516 if( c->vtt_basename) {
517 if (av_get_frame_filename(vtt_oc->filename, sizeof(vtt_oc->filename),
518 c->vtt_basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
519 av_log(vtt_oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", c->vtt_basename);
520 return AVERROR(EINVAL);
526 set_http_options(&options, c);
528 if (c->key_info_file) {
529 if ((err = hls_encryption_start(s)) < 0)
531 if ((err = av_dict_set(&options, "encryption_key", c->key_string, 0))
534 err = av_strlcpy(iv_string, c->iv_string, sizeof(iv_string));
536 snprintf(iv_string, sizeof(iv_string), "%032"PRIx64, c->sequence);
537 if ((err = av_dict_set(&options, "encryption_iv", iv_string, 0)) < 0)
540 filename = av_asprintf("crypto:%s", oc->filename);
542 err = AVERROR(ENOMEM);
545 err = avio_open2(&oc->pb, filename, AVIO_FLAG_WRITE,
546 &s->interrupt_callback, &options);
548 av_dict_free(&options);
552 if ((err = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
553 &s->interrupt_callback, &options)) < 0)
555 if (c->vtt_basename) {
556 set_http_options(&options, c);
557 if ((err = avio_open2(&vtt_oc->pb, vtt_oc->filename, AVIO_FLAG_WRITE,
558 &s->interrupt_callback, &options)) < 0)
561 av_dict_free(&options);
563 if (oc->oformat->priv_class && oc->priv_data)
564 av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0);
567 avformat_write_header(vtt_oc,NULL);
571 av_dict_free(&options);
576 static int hls_write_header(AVFormatContext *s)
578 HLSContext *hls = s->priv_data;
581 const char *pattern = "%d.ts";
582 const char *pattern_localtime_fmt = "-%s.ts";
583 const char *vtt_pattern = "%d.vtt";
584 AVDictionary *options = NULL;
586 int vtt_basename_size;
588 hls->sequence = hls->start_sequence;
589 hls->recording_time = hls->time * AV_TIME_BASE;
590 hls->start_pts = AV_NOPTS_VALUE;
592 if (hls->format_options_str) {
593 ret = av_dict_parse_string(&hls->format_options, hls->format_options_str, "=", ":", 0);
595 av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", hls->format_options_str);
600 for (i = 0; i < s->nb_streams; i++) {
602 s->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO;
604 s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE;
607 if (hls->has_video > 1)
608 av_log(s, AV_LOG_WARNING,
609 "More than a single video stream present, "
610 "expect issues decoding it.\n");
612 hls->oformat = av_guess_format("mpegts", NULL, NULL);
615 ret = AVERROR_MUXER_NOT_FOUND;
619 if(hls->has_subtitle) {
620 hls->vtt_oformat = av_guess_format("webvtt", NULL, NULL);
622 ret = AVERROR_MUXER_NOT_FOUND;
627 if (hls->segment_filename) {
628 hls->basename = av_strdup(hls->segment_filename);
629 if (!hls->basename) {
630 ret = AVERROR(ENOMEM);
634 if (hls->flags & HLS_SINGLE_FILE)
637 if (hls->use_localtime) {
638 basename_size = strlen(s->filename) + strlen(pattern_localtime_fmt) + 1;
640 basename_size = strlen(s->filename) + strlen(pattern) + 1;
642 hls->basename = av_malloc(basename_size);
643 if (!hls->basename) {
644 ret = AVERROR(ENOMEM);
648 av_strlcpy(hls->basename, s->filename, basename_size);
650 p = strrchr(hls->basename, '.');
653 if (hls->use_localtime) {
654 av_strlcat(hls->basename, pattern_localtime_fmt, basename_size);
656 av_strlcat(hls->basename, pattern, basename_size);
660 if(hls->has_subtitle) {
662 if (hls->flags & HLS_SINGLE_FILE)
663 vtt_pattern = ".vtt";
664 vtt_basename_size = strlen(s->filename) + strlen(vtt_pattern) + 1;
665 hls->vtt_basename = av_malloc(vtt_basename_size);
666 if (!hls->vtt_basename) {
667 ret = AVERROR(ENOMEM);
670 hls->vtt_m3u8_name = av_malloc(vtt_basename_size);
671 if (!hls->vtt_m3u8_name ) {
672 ret = AVERROR(ENOMEM);
675 av_strlcpy(hls->vtt_basename, s->filename, vtt_basename_size);
676 p = strrchr(hls->vtt_basename, '.');
680 if( hls->subtitle_filename ) {
681 strcpy(hls->vtt_m3u8_name, hls->subtitle_filename);
683 strcpy(hls->vtt_m3u8_name, hls->vtt_basename);
684 av_strlcat(hls->vtt_m3u8_name, "_vtt.m3u8", vtt_basename_size);
686 av_strlcat(hls->vtt_basename, vtt_pattern, vtt_basename_size);
689 if ((ret = hls_mux_init(s)) < 0)
692 if ((ret = hls_start(s)) < 0)
695 av_dict_copy(&options, hls->format_options, 0);
696 ret = avformat_write_header(hls->avf, &options);
697 if (av_dict_count(options)) {
698 av_log(s, AV_LOG_ERROR, "Some of provided format options in '%s' are not recognized\n", hls->format_options_str);
699 ret = AVERROR(EINVAL);
702 //av_assert0(s->nb_streams == hls->avf->nb_streams);
703 for (i = 0; i < s->nb_streams; i++) {
705 AVStream *outer_st = s->streams[i];
706 if (outer_st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
707 inner_st = hls->avf->streams[i];
708 else if (hls->vtt_avf)
709 inner_st = hls->vtt_avf->streams[0];
711 /* We have a subtitle stream, when the user does not want one */
715 avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
719 av_dict_free(&options);
721 av_freep(&hls->basename);
722 av_freep(&hls->vtt_basename);
724 avformat_free_context(hls->avf);
726 avformat_free_context(hls->vtt_avf);
732 static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
734 HLSContext *hls = s->priv_data;
735 AVFormatContext *oc = NULL;
736 AVStream *st = s->streams[pkt->stream_index];
737 int64_t end_pts = hls->recording_time * hls->number;
739 int ret, can_split = 1;
740 int stream_index = 0;
742 if( st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
747 stream_index = pkt->stream_index;
749 if (hls->start_pts == AV_NOPTS_VALUE) {
750 hls->start_pts = pkt->pts;
751 hls->end_pts = pkt->pts;
754 if (hls->has_video) {
755 can_split = st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
756 pkt->flags & AV_PKT_FLAG_KEY;
757 is_ref_pkt = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
759 if (pkt->pts == AV_NOPTS_VALUE)
760 is_ref_pkt = can_split = 0;
763 hls->duration = (double)(pkt->pts - hls->end_pts)
764 * st->time_base.num / st->time_base.den;
766 if (can_split && av_compare_ts(pkt->pts - hls->start_pts, st->time_base,
767 end_pts, AV_TIME_BASE_Q) >= 0) {
768 int64_t new_start_pos;
769 av_write_frame(oc, NULL); /* Flush any buffered data */
771 new_start_pos = avio_tell(hls->avf->pb);
772 hls->size = new_start_pos - hls->start_pos;
773 ret = hls_append_segment(hls, hls->duration, hls->start_pos, hls->size);
774 hls->start_pos = new_start_pos;
778 hls->end_pts = pkt->pts;
781 if (hls->flags & HLS_SINGLE_FILE) {
782 if (hls->avf->oformat->priv_class && hls->avf->priv_data)
783 av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
786 avio_closep(&oc->pb);
788 avio_close(hls->vtt_avf->pb);
796 if( st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE )
801 if ((ret = hls_window(s, 0)) < 0)
805 ret = ff_write_chained(oc, stream_index, pkt, s, 0);
810 static int hls_write_trailer(struct AVFormatContext *s)
812 HLSContext *hls = s->priv_data;
813 AVFormatContext *oc = hls->avf;
814 AVFormatContext *vtt_oc = hls->vtt_avf;
816 av_write_trailer(oc);
818 hls->size = avio_tell(hls->avf->pb) - hls->start_pos;
819 avio_closep(&oc->pb);
820 hls_append_segment(hls, hls->duration, hls->start_pos, hls->size);
825 av_write_trailer(vtt_oc);
826 hls->size = avio_tell(hls->vtt_avf->pb) - hls->start_pos;
827 avio_closep(&vtt_oc->pb);
829 av_freep(&hls->basename);
830 avformat_free_context(oc);
833 av_freep(&hls->vtt_basename);
834 av_freep(&hls->vtt_m3u8_name);
835 avformat_free_context(vtt_oc);
841 hls_free_segments(hls->segments);
842 hls_free_segments(hls->old_segments);
846 #define OFFSET(x) offsetof(HLSContext, x)
847 #define E AV_OPT_FLAG_ENCODING_PARAM
848 static const AVOption options[] = {
849 {"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
850 {"hls_time", "set segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E},
851 {"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
852 {"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},
853 {"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},
854 {"hls_wrap", "set number after which the index wraps", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
855 {"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},
856 {"hls_base_url", "url to prepend to each playlist entry", OFFSET(baseurl), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
857 {"hls_segment_filename", "filename template for segment files", OFFSET(segment_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
858 {"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},
859 {"hls_subtitle_path", "set path of hls subtitles", OFFSET(subtitle_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
860 {"hls_flags", "set flags affecting HLS playlist and media file generation", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0 }, 0, UINT_MAX, E, "flags"},
861 {"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"},
862 {"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"},
863 {"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, "flags"},
864 {"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, "flags"},
865 {"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, "flags"},
866 { "use_localtime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, E },
867 {"method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
872 static const AVClass hls_class = {
873 .class_name = "hls muxer",
874 .item_name = av_default_item_name,
876 .version = LIBAVUTIL_VERSION_INT,
880 AVOutputFormat ff_hls_muxer = {
882 .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
883 .extensions = "m3u8",
884 .priv_data_size = sizeof(HLSContext),
885 .audio_codec = AV_CODEC_ID_AAC,
886 .video_codec = AV_CODEC_ID_H264,
887 .subtitle_codec = AV_CODEC_ID_WEBVTT,
888 .flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH,
889 .write_header = hls_write_header,
890 .write_packet = hls_write_packet,
891 .write_trailer = hls_write_trailer,
892 .priv_class = &hls_class,