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),
65 HLS_SPLIT_BY_TIME = (1 << 5),
75 typedef struct HLSContext {
76 const AVClass *class; // Class for private options.
79 int64_t start_sequence;
80 AVOutputFormat *oformat;
81 AVOutputFormat *vtt_oformat;
84 AVFormatContext *vtt_avf;
86 float time; // Set by a private option.
87 int max_nb_segments; // Set by a private option.
88 int wrap; // Set by a private option.
89 uint32_t flags; // enum HLSFlags
90 uint32_t pl_type; // enum PlaylistType
91 char *segment_filename;
93 int use_localtime; ///< flag to expand filename with localtime
94 int use_localtime_mkdir;///< flag to mkdir dirname in timebased filename
96 int64_t recording_time;
101 double duration; // last segment duration computed so far, in seconds
102 int64_t start_pos; // last segment starting position
103 int64_t size; // last segment size
105 int discontinuity_set;
107 HLSSegment *segments;
108 HLSSegment *last_segment;
109 HLSSegment *old_segments;
115 char *format_options_str;
116 char *vtt_format_options_str;
117 char *subtitle_filename;
118 AVDictionary *format_options;
121 char key_file[LINE_BUFFER_SIZE + 1];
122 char key_uri[LINE_BUFFER_SIZE + 1];
123 char key_string[KEYSIZE*2 + 1];
124 char iv_string[KEYSIZE*2 + 1];
125 AVDictionary *vtt_format_options;
131 static int hls_delete_old_segments(HLSContext *hls) {
133 HLSSegment *segment, *previous_segment = NULL;
134 float playlist_duration = 0.0f;
135 int ret = 0, path_size, sub_path_size;
136 char *dirname = NULL, *p, *sub_path;
139 segment = hls->segments;
141 playlist_duration += segment->duration;
142 segment = segment->next;
145 segment = hls->old_segments;
147 playlist_duration -= segment->duration;
148 previous_segment = segment;
149 segment = previous_segment->next;
150 if (playlist_duration <= -previous_segment->duration) {
151 previous_segment->next = NULL;
157 if (hls->segment_filename) {
158 dirname = av_strdup(hls->segment_filename);
160 dirname = av_strdup(hls->avf->filename);
163 ret = AVERROR(ENOMEM);
166 p = (char *)av_basename(dirname);
171 av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n",
173 path_size = strlen(dirname) + strlen(segment->filename) + 1;
174 path = av_malloc(path_size);
176 ret = AVERROR(ENOMEM);
180 av_strlcpy(path, dirname, path_size);
181 av_strlcat(path, segment->filename, path_size);
182 if (unlink(path) < 0) {
183 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
184 path, strerror(errno));
187 if (segment->sub_filename[0] != '\0') {
188 sub_path_size = strlen(dirname) + strlen(segment->sub_filename) + 1;
189 sub_path = av_malloc(sub_path_size);
191 ret = AVERROR(ENOMEM);
195 av_strlcpy(sub_path, dirname, sub_path_size);
196 av_strlcat(sub_path, segment->sub_filename, sub_path_size);
197 if (unlink(sub_path) < 0) {
198 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
199 sub_path, strerror(errno));
204 previous_segment = segment;
205 segment = previous_segment->next;
206 av_free(previous_segment);
216 static int hls_encryption_start(AVFormatContext *s)
218 HLSContext *hls = s->priv_data;
221 uint8_t key[KEYSIZE];
223 if ((ret = s->io_open(s, &pb, hls->key_info_file, AVIO_FLAG_READ, NULL)) < 0) {
224 av_log(hls, AV_LOG_ERROR,
225 "error opening key info file %s\n", hls->key_info_file);
229 ff_get_line(pb, hls->key_uri, sizeof(hls->key_uri));
230 hls->key_uri[strcspn(hls->key_uri, "\r\n")] = '\0';
232 ff_get_line(pb, hls->key_file, sizeof(hls->key_file));
233 hls->key_file[strcspn(hls->key_file, "\r\n")] = '\0';
235 ff_get_line(pb, hls->iv_string, sizeof(hls->iv_string));
236 hls->iv_string[strcspn(hls->iv_string, "\r\n")] = '\0';
238 ff_format_io_close(s, &pb);
240 if (!*hls->key_uri) {
241 av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
242 return AVERROR(EINVAL);
245 if (!*hls->key_file) {
246 av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
247 return AVERROR(EINVAL);
250 if ((ret = s->io_open(s, &pb, hls->key_file, AVIO_FLAG_READ, NULL)) < 0) {
251 av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", hls->key_file);
255 ret = avio_read(pb, key, sizeof(key));
256 ff_format_io_close(s, &pb);
257 if (ret != sizeof(key)) {
258 av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", hls->key_file);
259 if (ret >= 0 || ret == AVERROR_EOF)
260 ret = AVERROR(EINVAL);
263 ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
268 static int hls_mux_init(AVFormatContext *s)
270 HLSContext *hls = s->priv_data;
272 AVFormatContext *vtt_oc = NULL;
275 ret = avformat_alloc_output_context2(&hls->avf, hls->oformat, NULL, NULL);
280 oc->oformat = hls->oformat;
281 oc->interrupt_callback = s->interrupt_callback;
282 oc->max_delay = s->max_delay;
283 oc->opaque = s->opaque;
284 oc->io_open = s->io_open;
285 oc->io_close = s->io_close;
286 av_dict_copy(&oc->metadata, s->metadata, 0);
288 if(hls->vtt_oformat) {
289 ret = avformat_alloc_output_context2(&hls->vtt_avf, hls->vtt_oformat, NULL, NULL);
292 vtt_oc = hls->vtt_avf;
293 vtt_oc->oformat = hls->vtt_oformat;
294 av_dict_copy(&vtt_oc->metadata, s->metadata, 0);
297 for (i = 0; i < s->nb_streams; i++) {
299 AVFormatContext *loc;
300 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
305 if (!(st = avformat_new_stream(loc, NULL)))
306 return AVERROR(ENOMEM);
307 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
308 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
309 st->time_base = s->streams[i]->time_base;
316 /* Create a new segment and append it to the segment list */
317 static int hls_append_segment(struct AVFormatContext *s, HLSContext *hls, double duration,
318 int64_t pos, int64_t size)
320 HLSSegment *en = av_malloc(sizeof(*en));
322 const char *pl_dir, *filename;
326 return AVERROR(ENOMEM);
328 filename = av_basename(hls->avf->filename);
330 if (hls->use_localtime_mkdir) {
331 /* Possibly prefix with mkdir'ed subdir, if playlist share same
333 tmp = av_strdup(s->filename);
336 return AVERROR(ENOMEM);
339 pl_dir = av_dirname(tmp);
340 p = hls->avf->filename;
341 if (strstr(p, pl_dir) == p)
342 filename = hls->avf->filename + strlen(pl_dir) + 1;
345 av_strlcpy(en->filename, filename, sizeof(en->filename));
347 if(hls->has_subtitle)
348 av_strlcpy(en->sub_filename, av_basename(hls->vtt_avf->filename), sizeof(en->sub_filename));
350 en->sub_filename[0] = '\0';
352 en->duration = duration;
357 if (hls->key_info_file) {
358 av_strlcpy(en->key_uri, hls->key_uri, sizeof(en->key_uri));
359 av_strlcpy(en->iv_string, hls->iv_string, sizeof(en->iv_string));
365 hls->last_segment->next = en;
367 hls->last_segment = en;
369 // EVENT or VOD playlists imply sliding window cannot be used
370 if (hls->pl_type != PLAYLIST_TYPE_NONE)
371 hls->max_nb_segments = 0;
373 if (hls->max_nb_segments && hls->nb_entries >= hls->max_nb_segments) {
375 hls->segments = en->next;
376 if (en && hls->flags & HLS_DELETE_SEGMENTS &&
377 !(hls->flags & HLS_SINGLE_FILE || hls->wrap)) {
378 en->next = hls->old_segments;
379 hls->old_segments = en;
380 if ((ret = hls_delete_old_segments(hls)) < 0)
392 static void hls_free_segments(HLSSegment *p)
403 static void set_http_options(AVDictionary **options, HLSContext *c)
406 av_dict_set(options, "method", c->method, 0);
409 static int hls_window(AVFormatContext *s, int last)
411 HLSContext *hls = s->priv_data;
413 int target_duration = 0;
415 AVIOContext *out = NULL;
416 AVIOContext *sub_out = NULL;
417 char temp_filename[1024];
418 int64_t sequence = FFMAX(hls->start_sequence, hls->sequence - hls->nb_entries);
419 int version = hls->flags & HLS_SINGLE_FILE ? 4 : 3;
420 const char *proto = avio_find_protocol_name(s->filename);
421 int use_rename = proto && !strcmp(proto, "file");
422 static unsigned warned_non_file;
423 char *key_uri = NULL;
424 char *iv_string = NULL;
425 AVDictionary *options = NULL;
427 if (!use_rename && !warned_non_file++)
428 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporarly partial files\n");
430 set_http_options(&options, hls);
431 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
432 if ((ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, &options)) < 0)
435 for (en = hls->segments; en; en = en->next) {
436 if (target_duration < en->duration)
437 target_duration = ceil(en->duration);
440 hls->discontinuity_set = 0;
441 avio_printf(out, "#EXTM3U\n");
442 avio_printf(out, "#EXT-X-VERSION:%d\n", version);
443 if (hls->allowcache == 0 || hls->allowcache == 1) {
444 avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
446 avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
447 avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
448 if (hls->pl_type == PLAYLIST_TYPE_EVENT) {
449 avio_printf(out, "#EXT-X-PLAYLIST-TYPE:EVENT\n");
450 } else if (hls->pl_type == PLAYLIST_TYPE_VOD) {
451 avio_printf(out, "#EXT-X-PLAYLIST-TYPE:VOD\n");
454 av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
456 if((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && hls->discontinuity_set==0 ){
457 avio_printf(out, "#EXT-X-DISCONTINUITY\n");
458 hls->discontinuity_set = 1;
460 for (en = hls->segments; en; en = en->next) {
461 if (hls->key_info_file && (!key_uri || strcmp(en->key_uri, key_uri) ||
462 av_strcasecmp(en->iv_string, iv_string))) {
463 avio_printf(out, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"", en->key_uri);
465 avio_printf(out, ",IV=0x%s", en->iv_string);
466 avio_printf(out, "\n");
467 key_uri = en->key_uri;
468 iv_string = en->iv_string;
471 if (hls->flags & HLS_ROUND_DURATIONS)
472 avio_printf(out, "#EXTINF:%ld,\n", lrint(en->duration));
474 avio_printf(out, "#EXTINF:%f,\n", en->duration);
475 if (hls->flags & HLS_SINGLE_FILE)
476 avio_printf(out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
479 avio_printf(out, "%s", hls->baseurl);
480 avio_printf(out, "%s\n", en->filename);
483 if (last && (hls->flags & HLS_OMIT_ENDLIST)==0)
484 avio_printf(out, "#EXT-X-ENDLIST\n");
486 if( hls->vtt_m3u8_name ) {
487 if ((ret = s->io_open(s, &sub_out, hls->vtt_m3u8_name, AVIO_FLAG_WRITE, &options)) < 0)
489 avio_printf(sub_out, "#EXTM3U\n");
490 avio_printf(sub_out, "#EXT-X-VERSION:%d\n", version);
491 if (hls->allowcache == 0 || hls->allowcache == 1) {
492 avio_printf(sub_out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
494 avio_printf(sub_out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
495 avio_printf(sub_out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
497 av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
500 for (en = hls->segments; en; en = en->next) {
501 avio_printf(sub_out, "#EXTINF:%f,\n", en->duration);
502 if (hls->flags & HLS_SINGLE_FILE)
503 avio_printf(sub_out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
506 avio_printf(sub_out, "%s", hls->baseurl);
507 avio_printf(sub_out, "%s\n", en->sub_filename);
511 avio_printf(sub_out, "#EXT-X-ENDLIST\n");
516 av_dict_free(&options);
517 ff_format_io_close(s, &out);
518 ff_format_io_close(s, &sub_out);
519 if (ret >= 0 && use_rename)
520 ff_rename(temp_filename, s->filename, s);
524 static int hls_start(AVFormatContext *s)
526 HLSContext *c = s->priv_data;
527 AVFormatContext *oc = c->avf;
528 AVFormatContext *vtt_oc = c->vtt_avf;
529 AVDictionary *options = NULL;
530 char *filename, iv_string[KEYSIZE*2 + 1];
533 if (c->flags & HLS_SINGLE_FILE) {
534 av_strlcpy(oc->filename, c->basename,
535 sizeof(oc->filename));
537 av_strlcpy(vtt_oc->filename, c->vtt_basename,
538 sizeof(vtt_oc->filename));
540 if (c->use_localtime) {
542 struct tm *tm, tmpbuf;
544 tm = localtime_r(&now0, &tmpbuf);
545 if (!strftime(oc->filename, sizeof(oc->filename), c->basename, tm)) {
546 av_log(oc, AV_LOG_ERROR, "Could not get segment filename with use_localtime\n");
547 return AVERROR(EINVAL);
550 if (c->use_localtime_mkdir) {
552 char *fn_copy = av_strdup(oc->filename);
554 return AVERROR(ENOMEM);
556 dir = av_dirname(fn_copy);
557 if (mkdir(dir, 0777) == -1 && errno != EEXIST) {
558 av_log(oc, AV_LOG_ERROR, "Could not create directory %s with use_localtime_mkdir\n", dir);
560 return AVERROR(errno);
564 } else if (av_get_frame_filename(oc->filename, sizeof(oc->filename),
565 c->basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
566 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try use -use_localtime 1 with it\n", c->basename);
567 return AVERROR(EINVAL);
569 if( c->vtt_basename) {
570 if (av_get_frame_filename(vtt_oc->filename, sizeof(vtt_oc->filename),
571 c->vtt_basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
572 av_log(vtt_oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", c->vtt_basename);
573 return AVERROR(EINVAL);
579 set_http_options(&options, c);
581 if (c->key_info_file) {
582 if ((err = hls_encryption_start(s)) < 0)
584 if ((err = av_dict_set(&options, "encryption_key", c->key_string, 0))
587 err = av_strlcpy(iv_string, c->iv_string, sizeof(iv_string));
589 snprintf(iv_string, sizeof(iv_string), "%032"PRIx64, c->sequence);
590 if ((err = av_dict_set(&options, "encryption_iv", iv_string, 0)) < 0)
593 filename = av_asprintf("crypto:%s", oc->filename);
595 err = AVERROR(ENOMEM);
598 err = s->io_open(s, &oc->pb, filename, AVIO_FLAG_WRITE, &options);
600 av_dict_free(&options);
604 if ((err = s->io_open(s, &oc->pb, oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
606 if (c->vtt_basename) {
607 set_http_options(&options, c);
608 if ((err = s->io_open(s, &vtt_oc->pb, vtt_oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
611 av_dict_free(&options);
613 /* We only require one PAT/PMT per segment. */
614 if (oc->oformat->priv_class && oc->priv_data) {
617 snprintf(period, sizeof(period), "%d", (INT_MAX / 2) - 1);
619 av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0);
620 av_opt_set(oc->priv_data, "sdt_period", period, 0);
621 av_opt_set(oc->priv_data, "pat_period", period, 0);
624 if (c->vtt_basename) {
625 err = avformat_write_header(vtt_oc,NULL);
632 av_dict_free(&options);
637 static int hls_write_header(AVFormatContext *s)
639 HLSContext *hls = s->priv_data;
642 const char *pattern = "%d.ts";
643 const char *pattern_localtime_fmt = "-%s.ts";
644 const char *vtt_pattern = "%d.vtt";
645 AVDictionary *options = NULL;
647 int vtt_basename_size;
649 hls->sequence = hls->start_sequence;
650 hls->recording_time = hls->time * AV_TIME_BASE;
651 hls->start_pts = AV_NOPTS_VALUE;
653 if (hls->format_options_str) {
654 ret = av_dict_parse_string(&hls->format_options, hls->format_options_str, "=", ":", 0);
656 av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", hls->format_options_str);
661 for (i = 0; i < s->nb_streams; i++) {
663 s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
665 s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE;
668 if (hls->has_video > 1)
669 av_log(s, AV_LOG_WARNING,
670 "More than a single video stream present, "
671 "expect issues decoding it.\n");
673 hls->oformat = av_guess_format("mpegts", NULL, NULL);
676 ret = AVERROR_MUXER_NOT_FOUND;
680 if(hls->has_subtitle) {
681 hls->vtt_oformat = av_guess_format("webvtt", NULL, NULL);
683 ret = AVERROR_MUXER_NOT_FOUND;
688 if (hls->segment_filename) {
689 hls->basename = av_strdup(hls->segment_filename);
690 if (!hls->basename) {
691 ret = AVERROR(ENOMEM);
695 if (hls->flags & HLS_SINGLE_FILE)
698 if (hls->use_localtime) {
699 basename_size = strlen(s->filename) + strlen(pattern_localtime_fmt) + 1;
701 basename_size = strlen(s->filename) + strlen(pattern) + 1;
703 hls->basename = av_malloc(basename_size);
704 if (!hls->basename) {
705 ret = AVERROR(ENOMEM);
709 av_strlcpy(hls->basename, s->filename, basename_size);
711 p = strrchr(hls->basename, '.');
714 if (hls->use_localtime) {
715 av_strlcat(hls->basename, pattern_localtime_fmt, basename_size);
717 av_strlcat(hls->basename, pattern, basename_size);
721 if(hls->has_subtitle) {
723 if (hls->flags & HLS_SINGLE_FILE)
724 vtt_pattern = ".vtt";
725 vtt_basename_size = strlen(s->filename) + strlen(vtt_pattern) + 1;
726 hls->vtt_basename = av_malloc(vtt_basename_size);
727 if (!hls->vtt_basename) {
728 ret = AVERROR(ENOMEM);
731 hls->vtt_m3u8_name = av_malloc(vtt_basename_size);
732 if (!hls->vtt_m3u8_name ) {
733 ret = AVERROR(ENOMEM);
736 av_strlcpy(hls->vtt_basename, s->filename, vtt_basename_size);
737 p = strrchr(hls->vtt_basename, '.');
741 if( hls->subtitle_filename ) {
742 strcpy(hls->vtt_m3u8_name, hls->subtitle_filename);
744 strcpy(hls->vtt_m3u8_name, hls->vtt_basename);
745 av_strlcat(hls->vtt_m3u8_name, "_vtt.m3u8", vtt_basename_size);
747 av_strlcat(hls->vtt_basename, vtt_pattern, vtt_basename_size);
750 if ((ret = hls_mux_init(s)) < 0)
753 if ((ret = hls_start(s)) < 0)
756 av_dict_copy(&options, hls->format_options, 0);
757 ret = avformat_write_header(hls->avf, &options);
758 if (av_dict_count(options)) {
759 av_log(s, AV_LOG_ERROR, "Some of provided format options in '%s' are not recognized\n", hls->format_options_str);
760 ret = AVERROR(EINVAL);
763 //av_assert0(s->nb_streams == hls->avf->nb_streams);
764 for (i = 0; i < s->nb_streams; i++) {
766 AVStream *outer_st = s->streams[i];
767 if (outer_st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
768 inner_st = hls->avf->streams[i];
769 else if (hls->vtt_avf)
770 inner_st = hls->vtt_avf->streams[0];
772 /* We have a subtitle stream, when the user does not want one */
776 avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
780 av_dict_free(&options);
782 av_freep(&hls->basename);
783 av_freep(&hls->vtt_basename);
785 avformat_free_context(hls->avf);
787 avformat_free_context(hls->vtt_avf);
793 static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
795 HLSContext *hls = s->priv_data;
796 AVFormatContext *oc = NULL;
797 AVStream *st = s->streams[pkt->stream_index];
798 int64_t end_pts = hls->recording_time * hls->number;
800 int ret, can_split = 1;
801 int stream_index = 0;
803 if( st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
808 stream_index = pkt->stream_index;
810 if (hls->start_pts == AV_NOPTS_VALUE) {
811 hls->start_pts = pkt->pts;
812 hls->end_pts = pkt->pts;
815 if (hls->has_video) {
816 can_split = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
817 ((pkt->flags & AV_PKT_FLAG_KEY) || (hls->flags & HLS_SPLIT_BY_TIME));
818 is_ref_pkt = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
820 if (pkt->pts == AV_NOPTS_VALUE)
821 is_ref_pkt = can_split = 0;
824 hls->duration = (double)(pkt->pts - hls->end_pts)
825 * st->time_base.num / st->time_base.den;
827 if (can_split && av_compare_ts(pkt->pts - hls->start_pts, st->time_base,
828 end_pts, AV_TIME_BASE_Q) >= 0) {
829 int64_t new_start_pos;
830 av_write_frame(oc, NULL); /* Flush any buffered data */
832 new_start_pos = avio_tell(hls->avf->pb);
833 hls->size = new_start_pos - hls->start_pos;
834 ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
835 hls->start_pos = new_start_pos;
839 hls->end_pts = pkt->pts;
842 if (hls->flags & HLS_SINGLE_FILE) {
843 if (hls->avf->oformat->priv_class && hls->avf->priv_data)
844 av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
847 ff_format_io_close(s, &oc->pb);
849 ff_format_io_close(s, &hls->vtt_avf->pb);
857 if( st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE )
862 if ((ret = hls_window(s, 0)) < 0)
866 ret = ff_write_chained(oc, stream_index, pkt, s, 0);
871 static int hls_write_trailer(struct AVFormatContext *s)
873 HLSContext *hls = s->priv_data;
874 AVFormatContext *oc = hls->avf;
875 AVFormatContext *vtt_oc = hls->vtt_avf;
877 av_write_trailer(oc);
879 hls->size = avio_tell(hls->avf->pb) - hls->start_pos;
880 ff_format_io_close(s, &oc->pb);
881 hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
886 av_write_trailer(vtt_oc);
887 hls->size = avio_tell(hls->vtt_avf->pb) - hls->start_pos;
888 ff_format_io_close(s, &vtt_oc->pb);
890 av_freep(&hls->basename);
891 avformat_free_context(oc);
894 av_freep(&hls->vtt_basename);
895 av_freep(&hls->vtt_m3u8_name);
896 avformat_free_context(vtt_oc);
902 hls_free_segments(hls->segments);
903 hls_free_segments(hls->old_segments);
907 #define OFFSET(x) offsetof(HLSContext, x)
908 #define E AV_OPT_FLAG_ENCODING_PARAM
909 static const AVOption options[] = {
910 {"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
911 {"hls_time", "set segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E},
912 {"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
913 {"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},
914 {"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},
915 {"hls_wrap", "set number after which the index wraps", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
916 {"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},
917 {"hls_base_url", "url to prepend to each playlist entry", OFFSET(baseurl), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
918 {"hls_segment_filename", "filename template for segment files", OFFSET(segment_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
919 {"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},
920 {"hls_subtitle_path", "set path of hls subtitles", OFFSET(subtitle_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
921 {"hls_flags", "set flags affecting HLS playlist and media file generation", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0 }, 0, UINT_MAX, E, "flags"},
922 {"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"},
923 {"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"},
924 {"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, "flags"},
925 {"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, "flags"},
926 {"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, "flags"},
927 {"split_by_time", "split the hls segment by time which user set by hls_time", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SPLIT_BY_TIME }, 0, UINT_MAX, E, "flags"},
928 {"use_localtime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
929 {"use_localtime_mkdir", "create last directory component in strftime-generated filename", OFFSET(use_localtime_mkdir), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
930 {"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" },
931 {"event", "EVENT playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_EVENT }, INT_MIN, INT_MAX, E, "pl_type" },
932 {"vod", "VOD playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_VOD }, INT_MIN, INT_MAX, E, "pl_type" },
933 {"method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
938 static const AVClass hls_class = {
939 .class_name = "hls muxer",
940 .item_name = av_default_item_name,
942 .version = LIBAVUTIL_VERSION_INT,
946 AVOutputFormat ff_hls_muxer = {
948 .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
949 .extensions = "m3u8",
950 .priv_data_size = sizeof(HLSContext),
951 .audio_codec = AV_CODEC_ID_AAC,
952 .video_codec = AV_CODEC_ID_H264,
953 .subtitle_codec = AV_CODEC_ID_WEBVTT,
954 .flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH,
955 .write_header = hls_write_header,
956 .write_packet = hls_write_packet,
957 .write_trailer = hls_write_trailer,
958 .priv_class = &hls_class,