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"
38 #include "avio_internal.h"
40 #include "os_support.h"
43 #define LINE_BUFFER_SIZE 1024
45 typedef struct HLSSegment {
47 char sub_filename[1024];
48 double duration; /* in seconds */
52 char key_uri[LINE_BUFFER_SIZE + 1];
53 char iv_string[KEYSIZE*2 + 1];
55 struct HLSSegment *next;
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),
67 typedef struct HLSContext {
68 const AVClass *class; // Class for private options.
71 int64_t start_sequence;
72 AVOutputFormat *oformat;
73 AVOutputFormat *vtt_oformat;
76 AVFormatContext *vtt_avf;
78 float time; // Set by a private option.
79 int max_nb_segments; // Set by a private option.
80 int wrap; // Set by a private option.
81 uint32_t flags; // enum HLSFlags
82 char *segment_filename;
84 int use_localtime; ///< flag to expand filename with localtime
86 int64_t recording_time;
91 double duration; // last segment duration computed so far, in seconds
92 int64_t start_pos; // last segment starting position
93 int64_t size; // last segment size
95 int discontinuity_set;
98 HLSSegment *last_segment;
99 HLSSegment *old_segments;
105 char *format_options_str;
106 char *vtt_format_options_str;
107 char *subtitle_filename;
108 AVDictionary *format_options;
111 char key_file[LINE_BUFFER_SIZE + 1];
112 char key_uri[LINE_BUFFER_SIZE + 1];
113 char key_string[KEYSIZE*2 + 1];
114 char iv_string[KEYSIZE*2 + 1];
115 AVDictionary *vtt_format_options;
121 static int hls_delete_old_segments(HLSContext *hls) {
123 HLSSegment *segment, *previous_segment = NULL;
124 float playlist_duration = 0.0f;
125 int ret = 0, path_size, sub_path_size;
126 char *dirname = NULL, *p, *sub_path;
129 segment = hls->segments;
131 playlist_duration += segment->duration;
132 segment = segment->next;
135 segment = hls->old_segments;
137 playlist_duration -= segment->duration;
138 previous_segment = segment;
139 segment = previous_segment->next;
140 if (playlist_duration <= -previous_segment->duration) {
141 previous_segment->next = NULL;
147 if (hls->segment_filename) {
148 dirname = av_strdup(hls->segment_filename);
150 dirname = av_strdup(hls->avf->filename);
153 ret = AVERROR(ENOMEM);
156 p = (char *)av_basename(dirname);
161 av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n",
163 path_size = strlen(dirname) + strlen(segment->filename) + 1;
164 path = av_malloc(path_size);
166 ret = AVERROR(ENOMEM);
170 av_strlcpy(path, dirname, path_size);
171 av_strlcat(path, segment->filename, path_size);
172 if (unlink(path) < 0) {
173 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
174 path, strerror(errno));
177 if (segment->sub_filename[0] != '\0') {
178 sub_path_size = strlen(dirname) + strlen(segment->sub_filename) + 1;
179 sub_path = av_malloc(sub_path_size);
181 ret = AVERROR(ENOMEM);
185 av_strlcpy(sub_path, dirname, sub_path_size);
186 av_strlcat(sub_path, segment->sub_filename, sub_path_size);
187 if (unlink(sub_path) < 0) {
188 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
189 sub_path, strerror(errno));
194 previous_segment = segment;
195 segment = previous_segment->next;
196 av_free(previous_segment);
206 static int hls_encryption_start(AVFormatContext *s)
208 HLSContext *hls = s->priv_data;
211 uint8_t key[KEYSIZE];
213 if ((ret = ffio_open_whitelist(&pb, hls->key_info_file, AVIO_FLAG_READ,
214 &s->interrupt_callback, NULL, s->protocol_whitelist)) < 0) {
215 av_log(hls, AV_LOG_ERROR,
216 "error opening key info file %s\n", hls->key_info_file);
220 ff_get_line(pb, hls->key_uri, sizeof(hls->key_uri));
221 hls->key_uri[strcspn(hls->key_uri, "\r\n")] = '\0';
223 ff_get_line(pb, hls->key_file, sizeof(hls->key_file));
224 hls->key_file[strcspn(hls->key_file, "\r\n")] = '\0';
226 ff_get_line(pb, hls->iv_string, sizeof(hls->iv_string));
227 hls->iv_string[strcspn(hls->iv_string, "\r\n")] = '\0';
231 if (!*hls->key_uri) {
232 av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
233 return AVERROR(EINVAL);
236 if (!*hls->key_file) {
237 av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
238 return AVERROR(EINVAL);
241 if ((ret = ffio_open_whitelist(&pb, hls->key_file, AVIO_FLAG_READ,
242 &s->interrupt_callback, NULL, s->protocol_whitelist)) < 0) {
243 av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", hls->key_file);
247 ret = avio_read(pb, key, sizeof(key));
249 if (ret != sizeof(key)) {
250 av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", hls->key_file);
251 if (ret >= 0 || ret == AVERROR_EOF)
252 ret = AVERROR(EINVAL);
255 ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
260 static int hls_mux_init(AVFormatContext *s)
262 HLSContext *hls = s->priv_data;
264 AVFormatContext *vtt_oc = NULL;
267 ret = avformat_alloc_output_context2(&hls->avf, hls->oformat, NULL, NULL);
272 oc->oformat = hls->oformat;
273 oc->interrupt_callback = s->interrupt_callback;
274 oc->max_delay = s->max_delay;
275 av_dict_copy(&oc->metadata, s->metadata, 0);
277 if(hls->vtt_oformat) {
278 ret = avformat_alloc_output_context2(&hls->vtt_avf, hls->vtt_oformat, NULL, NULL);
281 vtt_oc = hls->vtt_avf;
282 vtt_oc->oformat = hls->vtt_oformat;
283 av_dict_copy(&vtt_oc->metadata, s->metadata, 0);
286 for (i = 0; i < s->nb_streams; i++) {
288 AVFormatContext *loc;
289 if (s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE)
294 if (!(st = avformat_new_stream(loc, NULL)))
295 return AVERROR(ENOMEM);
296 avcodec_copy_context(st->codec, s->streams[i]->codec);
297 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
298 st->time_base = s->streams[i]->time_base;
305 /* Create a new segment and append it to the segment list */
306 static int hls_append_segment(HLSContext *hls, double duration, int64_t pos,
309 HLSSegment *en = av_malloc(sizeof(*en));
313 return AVERROR(ENOMEM);
315 av_strlcpy(en->filename, av_basename(hls->avf->filename), sizeof(en->filename));
317 if(hls->has_subtitle)
318 av_strlcpy(en->sub_filename, av_basename(hls->vtt_avf->filename), sizeof(en->sub_filename));
320 en->sub_filename[0] = '\0';
322 en->duration = duration;
327 if (hls->key_info_file) {
328 av_strlcpy(en->key_uri, hls->key_uri, sizeof(en->key_uri));
329 av_strlcpy(en->iv_string, hls->iv_string, sizeof(en->iv_string));
335 hls->last_segment->next = en;
337 hls->last_segment = en;
339 if (hls->max_nb_segments && hls->nb_entries >= hls->max_nb_segments) {
341 hls->segments = en->next;
342 if (en && hls->flags & HLS_DELETE_SEGMENTS &&
343 !(hls->flags & HLS_SINGLE_FILE || hls->wrap)) {
344 en->next = hls->old_segments;
345 hls->old_segments = en;
346 if ((ret = hls_delete_old_segments(hls)) < 0)
358 static void hls_free_segments(HLSSegment *p)
369 static void set_http_options(AVDictionary **options, HLSContext *c)
372 av_dict_set(options, "method", c->method, 0);
375 static int hls_window(AVFormatContext *s, int last)
377 HLSContext *hls = s->priv_data;
379 int target_duration = 0;
381 AVIOContext *out = NULL;
382 AVIOContext *sub_out = NULL;
383 char temp_filename[1024];
384 int64_t sequence = FFMAX(hls->start_sequence, hls->sequence - hls->nb_entries);
385 int version = hls->flags & HLS_SINGLE_FILE ? 4 : 3;
386 const char *proto = avio_find_protocol_name(s->filename);
387 int use_rename = proto && !strcmp(proto, "file");
388 static unsigned warned_non_file;
389 char *key_uri = NULL;
390 char *iv_string = NULL;
391 AVDictionary *options = NULL;
393 if (!use_rename && !warned_non_file++)
394 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporarly partial files\n");
396 set_http_options(&options, hls);
397 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
398 if ((ret = ffio_open_whitelist(&out, temp_filename, AVIO_FLAG_WRITE,
399 &s->interrupt_callback, &options, s->protocol_whitelist)) < 0)
402 for (en = hls->segments; en; en = en->next) {
403 if (target_duration < en->duration)
404 target_duration = ceil(en->duration);
407 hls->discontinuity_set = 0;
408 avio_printf(out, "#EXTM3U\n");
409 avio_printf(out, "#EXT-X-VERSION:%d\n", version);
410 if (hls->allowcache == 0 || hls->allowcache == 1) {
411 avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
413 avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
414 avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
416 av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
418 if((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && hls->discontinuity_set==0 ){
419 avio_printf(out, "#EXT-X-DISCONTINUITY\n");
420 hls->discontinuity_set = 1;
422 for (en = hls->segments; en; en = en->next) {
423 if (hls->key_info_file && (!key_uri || strcmp(en->key_uri, key_uri) ||
424 av_strcasecmp(en->iv_string, iv_string))) {
425 avio_printf(out, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"", en->key_uri);
427 avio_printf(out, ",IV=0x%s", en->iv_string);
428 avio_printf(out, "\n");
429 key_uri = en->key_uri;
430 iv_string = en->iv_string;
433 if (hls->flags & HLS_ROUND_DURATIONS)
434 avio_printf(out, "#EXTINF:%ld,\n", lrint(en->duration));
436 avio_printf(out, "#EXTINF:%f,\n", en->duration);
437 if (hls->flags & HLS_SINGLE_FILE)
438 avio_printf(out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
441 avio_printf(out, "%s", hls->baseurl);
442 avio_printf(out, "%s\n", en->filename);
445 if (last && (hls->flags & HLS_OMIT_ENDLIST)==0)
446 avio_printf(out, "#EXT-X-ENDLIST\n");
448 if( hls->vtt_m3u8_name ) {
449 if ((ret = ffio_open_whitelist(&sub_out, hls->vtt_m3u8_name, AVIO_FLAG_WRITE,
450 &s->interrupt_callback, &options, s->protocol_whitelist)) < 0)
452 avio_printf(sub_out, "#EXTM3U\n");
453 avio_printf(sub_out, "#EXT-X-VERSION:%d\n", version);
454 if (hls->allowcache == 0 || hls->allowcache == 1) {
455 avio_printf(sub_out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
457 avio_printf(sub_out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
458 avio_printf(sub_out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
460 av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
463 for (en = hls->segments; en; en = en->next) {
464 avio_printf(sub_out, "#EXTINF:%f,\n", en->duration);
465 if (hls->flags & HLS_SINGLE_FILE)
466 avio_printf(sub_out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
469 avio_printf(sub_out, "%s", hls->baseurl);
470 avio_printf(sub_out, "%s\n", en->sub_filename);
474 avio_printf(sub_out, "#EXT-X-ENDLIST\n");
479 av_dict_free(&options);
481 avio_closep(&sub_out);
482 if (ret >= 0 && use_rename)
483 ff_rename(temp_filename, s->filename, s);
487 static int hls_start(AVFormatContext *s)
489 HLSContext *c = s->priv_data;
490 AVFormatContext *oc = c->avf;
491 AVFormatContext *vtt_oc = c->vtt_avf;
492 AVDictionary *options = NULL;
493 char *filename, iv_string[KEYSIZE*2 + 1];
496 if (c->flags & HLS_SINGLE_FILE) {
497 av_strlcpy(oc->filename, c->basename,
498 sizeof(oc->filename));
500 av_strlcpy(vtt_oc->filename, c->vtt_basename,
501 sizeof(vtt_oc->filename));
503 if (c->use_localtime) {
505 struct tm *tm, tmpbuf;
507 tm = localtime_r(&now0, &tmpbuf);
508 if (!strftime(oc->filename, sizeof(oc->filename), c->basename, tm)) {
509 av_log(oc, AV_LOG_ERROR, "Could not get segment filename with use_localtime\n");
510 return AVERROR(EINVAL);
512 } else if (av_get_frame_filename(oc->filename, sizeof(oc->filename),
513 c->basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
514 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try use -use_localtime 1 with it\n", c->basename);
515 return AVERROR(EINVAL);
517 if( c->vtt_basename) {
518 if (av_get_frame_filename(vtt_oc->filename, sizeof(vtt_oc->filename),
519 c->vtt_basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
520 av_log(vtt_oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", c->vtt_basename);
521 return AVERROR(EINVAL);
527 set_http_options(&options, c);
529 if (c->key_info_file) {
530 if ((err = hls_encryption_start(s)) < 0)
532 if ((err = av_dict_set(&options, "encryption_key", c->key_string, 0))
535 err = av_strlcpy(iv_string, c->iv_string, sizeof(iv_string));
537 snprintf(iv_string, sizeof(iv_string), "%032"PRIx64, c->sequence);
538 if ((err = av_dict_set(&options, "encryption_iv", iv_string, 0)) < 0)
541 filename = av_asprintf("crypto:%s", oc->filename);
543 err = AVERROR(ENOMEM);
546 err = ffio_open_whitelist(&oc->pb, filename, AVIO_FLAG_WRITE,
547 &s->interrupt_callback, &options, s->protocol_whitelist);
549 av_dict_free(&options);
553 if ((err = ffio_open_whitelist(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
554 &s->interrupt_callback, &options, s->protocol_whitelist)) < 0)
556 if (c->vtt_basename) {
557 set_http_options(&options, c);
558 if ((err = ffio_open_whitelist(&vtt_oc->pb, vtt_oc->filename, AVIO_FLAG_WRITE,
559 &s->interrupt_callback, &options, s->protocol_whitelist)) < 0)
562 av_dict_free(&options);
564 /* We only require one PAT/PMT per segment. */
565 if (oc->oformat->priv_class && oc->priv_data) {
568 snprintf(period, sizeof(period), "%d", (INT_MAX / 2) - 1);
570 av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0);
571 av_opt_set(oc->priv_data, "sdt_period", period, 0);
572 av_opt_set(oc->priv_data, "pat_period", period, 0);
575 if (c->vtt_basename) {
576 err = avformat_write_header(vtt_oc,NULL);
583 av_dict_free(&options);
588 static int hls_write_header(AVFormatContext *s)
590 HLSContext *hls = s->priv_data;
593 const char *pattern = "%d.ts";
594 const char *pattern_localtime_fmt = "-%s.ts";
595 const char *vtt_pattern = "%d.vtt";
596 AVDictionary *options = NULL;
598 int vtt_basename_size;
600 hls->sequence = hls->start_sequence;
601 hls->recording_time = hls->time * AV_TIME_BASE;
602 hls->start_pts = AV_NOPTS_VALUE;
604 if (hls->format_options_str) {
605 ret = av_dict_parse_string(&hls->format_options, hls->format_options_str, "=", ":", 0);
607 av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", hls->format_options_str);
612 for (i = 0; i < s->nb_streams; i++) {
614 s->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO;
616 s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE;
619 if (hls->has_video > 1)
620 av_log(s, AV_LOG_WARNING,
621 "More than a single video stream present, "
622 "expect issues decoding it.\n");
624 hls->oformat = av_guess_format("mpegts", NULL, NULL);
627 ret = AVERROR_MUXER_NOT_FOUND;
631 if(hls->has_subtitle) {
632 hls->vtt_oformat = av_guess_format("webvtt", NULL, NULL);
634 ret = AVERROR_MUXER_NOT_FOUND;
639 if (hls->segment_filename) {
640 hls->basename = av_strdup(hls->segment_filename);
641 if (!hls->basename) {
642 ret = AVERROR(ENOMEM);
646 if (hls->flags & HLS_SINGLE_FILE)
649 if (hls->use_localtime) {
650 basename_size = strlen(s->filename) + strlen(pattern_localtime_fmt) + 1;
652 basename_size = strlen(s->filename) + strlen(pattern) + 1;
654 hls->basename = av_malloc(basename_size);
655 if (!hls->basename) {
656 ret = AVERROR(ENOMEM);
660 av_strlcpy(hls->basename, s->filename, basename_size);
662 p = strrchr(hls->basename, '.');
665 if (hls->use_localtime) {
666 av_strlcat(hls->basename, pattern_localtime_fmt, basename_size);
668 av_strlcat(hls->basename, pattern, basename_size);
672 if(hls->has_subtitle) {
674 if (hls->flags & HLS_SINGLE_FILE)
675 vtt_pattern = ".vtt";
676 vtt_basename_size = strlen(s->filename) + strlen(vtt_pattern) + 1;
677 hls->vtt_basename = av_malloc(vtt_basename_size);
678 if (!hls->vtt_basename) {
679 ret = AVERROR(ENOMEM);
682 hls->vtt_m3u8_name = av_malloc(vtt_basename_size);
683 if (!hls->vtt_m3u8_name ) {
684 ret = AVERROR(ENOMEM);
687 av_strlcpy(hls->vtt_basename, s->filename, vtt_basename_size);
688 p = strrchr(hls->vtt_basename, '.');
692 if( hls->subtitle_filename ) {
693 strcpy(hls->vtt_m3u8_name, hls->subtitle_filename);
695 strcpy(hls->vtt_m3u8_name, hls->vtt_basename);
696 av_strlcat(hls->vtt_m3u8_name, "_vtt.m3u8", vtt_basename_size);
698 av_strlcat(hls->vtt_basename, vtt_pattern, vtt_basename_size);
701 if ((ret = hls_mux_init(s)) < 0)
704 if ((ret = hls_start(s)) < 0)
707 av_dict_copy(&options, hls->format_options, 0);
708 ret = avformat_write_header(hls->avf, &options);
709 if (av_dict_count(options)) {
710 av_log(s, AV_LOG_ERROR, "Some of provided format options in '%s' are not recognized\n", hls->format_options_str);
711 ret = AVERROR(EINVAL);
714 //av_assert0(s->nb_streams == hls->avf->nb_streams);
715 for (i = 0; i < s->nb_streams; i++) {
717 AVStream *outer_st = s->streams[i];
718 if (outer_st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
719 inner_st = hls->avf->streams[i];
720 else if (hls->vtt_avf)
721 inner_st = hls->vtt_avf->streams[0];
723 /* We have a subtitle stream, when the user does not want one */
727 avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
731 av_dict_free(&options);
733 av_freep(&hls->basename);
734 av_freep(&hls->vtt_basename);
736 avformat_free_context(hls->avf);
738 avformat_free_context(hls->vtt_avf);
744 static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
746 HLSContext *hls = s->priv_data;
747 AVFormatContext *oc = NULL;
748 AVStream *st = s->streams[pkt->stream_index];
749 int64_t end_pts = hls->recording_time * hls->number;
751 int ret, can_split = 1;
752 int stream_index = 0;
754 if( st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
759 stream_index = pkt->stream_index;
761 if (hls->start_pts == AV_NOPTS_VALUE) {
762 hls->start_pts = pkt->pts;
763 hls->end_pts = pkt->pts;
766 if (hls->has_video) {
767 can_split = st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
768 pkt->flags & AV_PKT_FLAG_KEY;
769 is_ref_pkt = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
771 if (pkt->pts == AV_NOPTS_VALUE)
772 is_ref_pkt = can_split = 0;
775 hls->duration = (double)(pkt->pts - hls->end_pts)
776 * st->time_base.num / st->time_base.den;
778 if (can_split && av_compare_ts(pkt->pts - hls->start_pts, st->time_base,
779 end_pts, AV_TIME_BASE_Q) >= 0) {
780 int64_t new_start_pos;
781 av_write_frame(oc, NULL); /* Flush any buffered data */
783 new_start_pos = avio_tell(hls->avf->pb);
784 hls->size = new_start_pos - hls->start_pos;
785 ret = hls_append_segment(hls, hls->duration, hls->start_pos, hls->size);
786 hls->start_pos = new_start_pos;
790 hls->end_pts = pkt->pts;
793 if (hls->flags & HLS_SINGLE_FILE) {
794 if (hls->avf->oformat->priv_class && hls->avf->priv_data)
795 av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
798 avio_closep(&oc->pb);
800 avio_close(hls->vtt_avf->pb);
808 if( st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE )
813 if ((ret = hls_window(s, 0)) < 0)
817 ret = ff_write_chained(oc, stream_index, pkt, s, 0);
822 static int hls_write_trailer(struct AVFormatContext *s)
824 HLSContext *hls = s->priv_data;
825 AVFormatContext *oc = hls->avf;
826 AVFormatContext *vtt_oc = hls->vtt_avf;
828 av_write_trailer(oc);
830 hls->size = avio_tell(hls->avf->pb) - hls->start_pos;
831 avio_closep(&oc->pb);
832 hls_append_segment(hls, hls->duration, hls->start_pos, hls->size);
837 av_write_trailer(vtt_oc);
838 hls->size = avio_tell(hls->vtt_avf->pb) - hls->start_pos;
839 avio_closep(&vtt_oc->pb);
841 av_freep(&hls->basename);
842 avformat_free_context(oc);
845 av_freep(&hls->vtt_basename);
846 av_freep(&hls->vtt_m3u8_name);
847 avformat_free_context(vtt_oc);
853 hls_free_segments(hls->segments);
854 hls_free_segments(hls->old_segments);
858 #define OFFSET(x) offsetof(HLSContext, x)
859 #define E AV_OPT_FLAG_ENCODING_PARAM
860 static const AVOption options[] = {
861 {"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
862 {"hls_time", "set segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E},
863 {"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
864 {"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},
865 {"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},
866 {"hls_wrap", "set number after which the index wraps", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
867 {"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},
868 {"hls_base_url", "url to prepend to each playlist entry", OFFSET(baseurl), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
869 {"hls_segment_filename", "filename template for segment files", OFFSET(segment_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
870 {"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},
871 {"hls_subtitle_path", "set path of hls subtitles", OFFSET(subtitle_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
872 {"hls_flags", "set flags affecting HLS playlist and media file generation", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0 }, 0, UINT_MAX, E, "flags"},
873 {"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"},
874 {"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"},
875 {"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, "flags"},
876 {"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, "flags"},
877 {"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, "flags"},
878 { "use_localtime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
879 {"method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
884 static const AVClass hls_class = {
885 .class_name = "hls muxer",
886 .item_name = av_default_item_name,
888 .version = LIBAVUTIL_VERSION_INT,
892 AVOutputFormat ff_hls_muxer = {
894 .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
895 .extensions = "m3u8",
896 .priv_data_size = sizeof(HLSContext),
897 .audio_codec = AV_CODEC_ID_AAC,
898 .video_codec = AV_CODEC_ID_H264,
899 .subtitle_codec = AV_CODEC_ID_WEBVTT,
900 .flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH,
901 .write_header = hls_write_header,
902 .write_packet = hls_write_packet,
903 .write_trailer = hls_write_trailer,
904 .priv_class = &hls_class,