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),
66 HLS_APPEND_LIST = (1 << 6),
67 HLS_PROGRAM_DATE_TIME = (1 << 7),
77 typedef struct HLSContext {
78 const AVClass *class; // Class for private options.
81 int64_t start_sequence;
82 AVOutputFormat *oformat;
83 AVOutputFormat *vtt_oformat;
86 AVFormatContext *vtt_avf;
88 float time; // Set by a private option.
89 float init_time; // Set by a private option.
90 int max_nb_segments; // Set by a private option.
91 int wrap; // Set by a private option.
92 uint32_t flags; // enum HLSFlags
93 uint32_t pl_type; // enum PlaylistType
94 char *segment_filename;
96 int use_localtime; ///< flag to expand filename with localtime
97 int use_localtime_mkdir;///< flag to mkdir dirname in timebased filename
99 int64_t recording_time;
104 double duration; // last segment duration computed so far, in seconds
105 int64_t start_pos; // last segment starting position
106 int64_t size; // last segment size
107 int64_t max_seg_size; // every segment file max size
109 int discontinuity_set;
111 HLSSegment *segments;
112 HLSSegment *last_segment;
113 HLSSegment *old_segments;
119 char *format_options_str;
120 char *vtt_format_options_str;
121 char *subtitle_filename;
122 AVDictionary *format_options;
125 char key_file[LINE_BUFFER_SIZE + 1];
126 char key_uri[LINE_BUFFER_SIZE + 1];
127 char key_string[KEYSIZE*2 + 1];
128 char iv_string[KEYSIZE*2 + 1];
129 AVDictionary *vtt_format_options;
133 double initial_prog_date_time;
136 static int mkdir_p(const char *path) {
138 char *temp = av_strdup(path);
142 if (!path || !temp) {
146 if (!strncmp(temp, "/", 1) || !strncmp(temp, "\\", 1)) {
148 } else if (!strncmp(temp, "./", 2) || !strncmp(temp, ".\\", 2)) {
152 for ( ; *pos != '\0'; ++pos) {
153 if (*pos == '/' || *pos == '\\') {
156 ret = mkdir(temp, 0755);
161 if ((*(pos - 1) != '/') || (*(pos - 1) != '\\')) {
162 ret = mkdir(temp, 0755);
169 static int hls_delete_old_segments(HLSContext *hls) {
171 HLSSegment *segment, *previous_segment = NULL;
172 float playlist_duration = 0.0f;
173 int ret = 0, path_size, sub_path_size;
174 char *dirname = NULL, *p, *sub_path;
177 segment = hls->segments;
179 playlist_duration += segment->duration;
180 segment = segment->next;
183 segment = hls->old_segments;
185 playlist_duration -= segment->duration;
186 hls->initial_prog_date_time += segment->duration;
187 previous_segment = segment;
188 segment = previous_segment->next;
189 if (playlist_duration <= -previous_segment->duration) {
190 previous_segment->next = NULL;
196 if (hls->segment_filename) {
197 dirname = av_strdup(hls->segment_filename);
199 dirname = av_strdup(hls->avf->filename);
202 ret = AVERROR(ENOMEM);
205 p = (char *)av_basename(dirname);
210 av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n",
212 path_size = strlen(dirname) + strlen(segment->filename) + 1;
213 path = av_malloc(path_size);
215 ret = AVERROR(ENOMEM);
219 av_strlcpy(path, dirname, path_size);
220 av_strlcat(path, segment->filename, path_size);
221 if (unlink(path) < 0) {
222 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
223 path, strerror(errno));
226 if (segment->sub_filename[0] != '\0') {
227 sub_path_size = strlen(dirname) + strlen(segment->sub_filename) + 1;
228 sub_path = av_malloc(sub_path_size);
230 ret = AVERROR(ENOMEM);
234 av_strlcpy(sub_path, dirname, sub_path_size);
235 av_strlcat(sub_path, segment->sub_filename, sub_path_size);
236 if (unlink(sub_path) < 0) {
237 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
238 sub_path, strerror(errno));
243 previous_segment = segment;
244 segment = previous_segment->next;
245 av_free(previous_segment);
255 static int hls_encryption_start(AVFormatContext *s)
257 HLSContext *hls = s->priv_data;
260 uint8_t key[KEYSIZE];
262 if ((ret = s->io_open(s, &pb, hls->key_info_file, AVIO_FLAG_READ, NULL)) < 0) {
263 av_log(hls, AV_LOG_ERROR,
264 "error opening key info file %s\n", hls->key_info_file);
268 ff_get_line(pb, hls->key_uri, sizeof(hls->key_uri));
269 hls->key_uri[strcspn(hls->key_uri, "\r\n")] = '\0';
271 ff_get_line(pb, hls->key_file, sizeof(hls->key_file));
272 hls->key_file[strcspn(hls->key_file, "\r\n")] = '\0';
274 ff_get_line(pb, hls->iv_string, sizeof(hls->iv_string));
275 hls->iv_string[strcspn(hls->iv_string, "\r\n")] = '\0';
277 ff_format_io_close(s, &pb);
279 if (!*hls->key_uri) {
280 av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
281 return AVERROR(EINVAL);
284 if (!*hls->key_file) {
285 av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
286 return AVERROR(EINVAL);
289 if ((ret = s->io_open(s, &pb, hls->key_file, AVIO_FLAG_READ, NULL)) < 0) {
290 av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", hls->key_file);
294 ret = avio_read(pb, key, sizeof(key));
295 ff_format_io_close(s, &pb);
296 if (ret != sizeof(key)) {
297 av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", hls->key_file);
298 if (ret >= 0 || ret == AVERROR_EOF)
299 ret = AVERROR(EINVAL);
302 ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
307 static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
309 int len = ff_get_line(s, buf, maxlen);
310 while (len > 0 && av_isspace(buf[len - 1]))
315 static int hls_mux_init(AVFormatContext *s)
317 HLSContext *hls = s->priv_data;
319 AVFormatContext *vtt_oc = NULL;
322 ret = avformat_alloc_output_context2(&hls->avf, hls->oformat, NULL, NULL);
327 oc->oformat = hls->oformat;
328 oc->interrupt_callback = s->interrupt_callback;
329 oc->max_delay = s->max_delay;
330 oc->opaque = s->opaque;
331 oc->io_open = s->io_open;
332 oc->io_close = s->io_close;
333 av_dict_copy(&oc->metadata, s->metadata, 0);
335 if(hls->vtt_oformat) {
336 ret = avformat_alloc_output_context2(&hls->vtt_avf, hls->vtt_oformat, NULL, NULL);
339 vtt_oc = hls->vtt_avf;
340 vtt_oc->oformat = hls->vtt_oformat;
341 av_dict_copy(&vtt_oc->metadata, s->metadata, 0);
344 for (i = 0; i < s->nb_streams; i++) {
346 AVFormatContext *loc;
347 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
352 if (!(st = avformat_new_stream(loc, NULL)))
353 return AVERROR(ENOMEM);
354 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
355 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
356 st->time_base = s->streams[i]->time_base;
363 /* Create a new segment and append it to the segment list */
364 static int hls_append_segment(struct AVFormatContext *s, HLSContext *hls, double duration,
365 int64_t pos, int64_t size)
367 HLSSegment *en = av_malloc(sizeof(*en));
368 const char *filename;
372 return AVERROR(ENOMEM);
374 filename = av_basename(hls->avf->filename);
376 if (hls->use_localtime_mkdir) {
377 filename = hls->avf->filename;
379 av_strlcpy(en->filename, filename, sizeof(en->filename));
381 if(hls->has_subtitle)
382 av_strlcpy(en->sub_filename, av_basename(hls->vtt_avf->filename), sizeof(en->sub_filename));
384 en->sub_filename[0] = '\0';
386 en->duration = duration;
391 if (hls->key_info_file) {
392 av_strlcpy(en->key_uri, hls->key_uri, sizeof(en->key_uri));
393 av_strlcpy(en->iv_string, hls->iv_string, sizeof(en->iv_string));
399 hls->last_segment->next = en;
401 hls->last_segment = en;
403 // EVENT or VOD playlists imply sliding window cannot be used
404 if (hls->pl_type != PLAYLIST_TYPE_NONE)
405 hls->max_nb_segments = 0;
407 if (hls->max_nb_segments && hls->nb_entries >= hls->max_nb_segments) {
409 hls->segments = en->next;
410 if (en && hls->flags & HLS_DELETE_SEGMENTS &&
411 !(hls->flags & HLS_SINGLE_FILE || hls->wrap)) {
412 en->next = hls->old_segments;
413 hls->old_segments = en;
414 if ((ret = hls_delete_old_segments(hls)) < 0)
421 if (hls->max_seg_size > 0) {
429 static int parse_playlist(AVFormatContext *s, const char *url)
431 HLSContext *hls = s->priv_data;
433 int ret = 0, is_segment = 0;
434 int64_t new_start_pos;
438 if ((ret = ffio_open_whitelist(&in, url, AVIO_FLAG_READ,
439 &s->interrupt_callback, NULL,
440 s->protocol_whitelist, s->protocol_blacklist)) < 0)
443 read_chomp_line(in, line, sizeof(line));
444 if (strcmp(line, "#EXTM3U")) {
445 ret = AVERROR_INVALIDDATA;
449 while (!avio_feof(in)) {
450 read_chomp_line(in, line, sizeof(line));
451 if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
452 hls->sequence = atoi(ptr);
453 } else if (av_strstart(line, "#EXTINF:", &ptr)) {
455 hls->duration = atof(ptr);
456 } else if (av_strstart(line, "#", NULL)) {
458 } else if (line[0]) {
461 new_start_pos = avio_tell(hls->avf->pb);
462 hls->size = new_start_pos - hls->start_pos;
463 av_strlcpy(hls->avf->filename, line, sizeof(line));
464 ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
467 hls->start_pos = new_start_pos;
477 static void hls_free_segments(HLSSegment *p)
488 static void set_http_options(AVDictionary **options, HLSContext *c)
491 av_dict_set(options, "method", c->method, 0);
494 static int hls_window(AVFormatContext *s, int last)
496 HLSContext *hls = s->priv_data;
498 int target_duration = 0;
500 AVIOContext *out = NULL;
501 AVIOContext *sub_out = NULL;
502 char temp_filename[1024];
503 int64_t sequence = FFMAX(hls->start_sequence, hls->sequence - hls->nb_entries);
505 const char *proto = avio_find_protocol_name(s->filename);
506 int use_rename = proto && !strcmp(proto, "file");
507 static unsigned warned_non_file;
508 char *key_uri = NULL;
509 char *iv_string = NULL;
510 AVDictionary *options = NULL;
511 double prog_date_time = hls->initial_prog_date_time;
512 int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
514 if (byterange_mode) {
519 if (!use_rename && !warned_non_file++)
520 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
522 set_http_options(&options, hls);
523 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
524 if ((ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, &options)) < 0)
527 for (en = hls->segments; en; en = en->next) {
528 if (target_duration < en->duration)
529 target_duration = ceil(en->duration);
532 hls->discontinuity_set = 0;
533 avio_printf(out, "#EXTM3U\n");
534 avio_printf(out, "#EXT-X-VERSION:%d\n", version);
535 if (hls->allowcache == 0 || hls->allowcache == 1) {
536 avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
538 avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
539 avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
540 if (hls->pl_type == PLAYLIST_TYPE_EVENT) {
541 avio_printf(out, "#EXT-X-PLAYLIST-TYPE:EVENT\n");
542 } else if (hls->pl_type == PLAYLIST_TYPE_VOD) {
543 avio_printf(out, "#EXT-X-PLAYLIST-TYPE:VOD\n");
546 av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
548 if((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && hls->discontinuity_set==0 ){
549 avio_printf(out, "#EXT-X-DISCONTINUITY\n");
550 hls->discontinuity_set = 1;
552 for (en = hls->segments; en; en = en->next) {
553 if (hls->key_info_file && (!key_uri || strcmp(en->key_uri, key_uri) ||
554 av_strcasecmp(en->iv_string, iv_string))) {
555 avio_printf(out, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"", en->key_uri);
557 avio_printf(out, ",IV=0x%s", en->iv_string);
558 avio_printf(out, "\n");
559 key_uri = en->key_uri;
560 iv_string = en->iv_string;
563 if (hls->flags & HLS_ROUND_DURATIONS)
564 avio_printf(out, "#EXTINF:%ld,\n", lrint(en->duration));
566 avio_printf(out, "#EXTINF:%f,\n", en->duration);
568 avio_printf(out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
570 if (hls->flags & HLS_PROGRAM_DATE_TIME) {
571 time_t tt, wrongsecs;
573 struct tm *tm, tmpbuf;
574 char buf0[128], buf1[128];
575 tt = (int64_t)prog_date_time;
576 milli = av_clip(lrint(1000*(prog_date_time - tt)), 0, 999);
577 tm = localtime_r(&tt, &tmpbuf);
578 strftime(buf0, sizeof(buf0), "%Y-%m-%dT%H:%M:%S", tm);
579 if (!strftime(buf1, sizeof(buf1), "%z", tm) || buf1[1]<'0' ||buf1[1]>'2') {
580 int tz_min, dst = tm->tm_isdst;
581 tm = gmtime_r(&tt, &tmpbuf);
583 wrongsecs = mktime(tm);
584 tz_min = (abs(wrongsecs - tt) + 30) / 60;
585 snprintf(buf1, sizeof(buf1),
587 wrongsecs <= tt ? '+' : '-',
591 avio_printf(out, "#EXT-X-PROGRAM-DATE-TIME:%s.%03d%s\n", buf0, milli, buf1);
592 prog_date_time += en->duration;
595 avio_printf(out, "%s", hls->baseurl);
596 avio_printf(out, "%s\n", en->filename);
599 if (last && (hls->flags & HLS_OMIT_ENDLIST)==0)
600 avio_printf(out, "#EXT-X-ENDLIST\n");
602 if( hls->vtt_m3u8_name ) {
603 if ((ret = s->io_open(s, &sub_out, hls->vtt_m3u8_name, AVIO_FLAG_WRITE, &options)) < 0)
605 avio_printf(sub_out, "#EXTM3U\n");
606 avio_printf(sub_out, "#EXT-X-VERSION:%d\n", version);
607 if (hls->allowcache == 0 || hls->allowcache == 1) {
608 avio_printf(sub_out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
610 avio_printf(sub_out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
611 avio_printf(sub_out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
613 av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
616 for (en = hls->segments; en; en = en->next) {
617 avio_printf(sub_out, "#EXTINF:%f,\n", en->duration);
619 avio_printf(sub_out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
622 avio_printf(sub_out, "%s", hls->baseurl);
623 avio_printf(sub_out, "%s\n", en->sub_filename);
627 avio_printf(sub_out, "#EXT-X-ENDLIST\n");
632 av_dict_free(&options);
633 ff_format_io_close(s, &out);
634 ff_format_io_close(s, &sub_out);
635 if (ret >= 0 && use_rename)
636 ff_rename(temp_filename, s->filename, s);
640 static int hls_start(AVFormatContext *s)
642 HLSContext *c = s->priv_data;
643 AVFormatContext *oc = c->avf;
644 AVFormatContext *vtt_oc = c->vtt_avf;
645 AVDictionary *options = NULL;
646 char *filename, iv_string[KEYSIZE*2 + 1];
649 if (c->flags & HLS_SINGLE_FILE) {
650 av_strlcpy(oc->filename, c->basename,
651 sizeof(oc->filename));
653 av_strlcpy(vtt_oc->filename, c->vtt_basename,
654 sizeof(vtt_oc->filename));
655 } else if (c->max_seg_size > 0) {
656 if (av_get_frame_filename2(oc->filename, sizeof(oc->filename),
657 c->basename, c->wrap ? c->sequence % c->wrap : c->sequence,
658 AV_FRAME_FILENAME_FLAGS_MULTIPLE) < 0) {
659 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s', you can try to use -use_localtime 1 with it\n", c->basename);
660 return AVERROR(EINVAL);
663 if (c->use_localtime) {
665 struct tm *tm, tmpbuf;
667 tm = localtime_r(&now0, &tmpbuf);
668 if (!strftime(oc->filename, sizeof(oc->filename), c->basename, tm)) {
669 av_log(oc, AV_LOG_ERROR, "Could not get segment filename with use_localtime\n");
670 return AVERROR(EINVAL);
673 if (c->use_localtime_mkdir) {
675 char *fn_copy = av_strdup(oc->filename);
677 return AVERROR(ENOMEM);
679 dir = av_dirname(fn_copy);
680 if (mkdir_p(dir) == -1 && errno != EEXIST) {
681 av_log(oc, AV_LOG_ERROR, "Could not create directory %s with use_localtime_mkdir\n", dir);
683 return AVERROR(errno);
687 } else if (av_get_frame_filename2(oc->filename, sizeof(oc->filename),
688 c->basename, c->wrap ? c->sequence % c->wrap : c->sequence,
689 AV_FRAME_FILENAME_FLAGS_MULTIPLE) < 0) {
690 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try to use -use_localtime 1 with it\n", c->basename);
691 return AVERROR(EINVAL);
693 if( c->vtt_basename) {
694 if (av_get_frame_filename2(vtt_oc->filename, sizeof(vtt_oc->filename),
695 c->vtt_basename, c->wrap ? c->sequence % c->wrap : c->sequence,
696 AV_FRAME_FILENAME_FLAGS_MULTIPLE) < 0) {
697 av_log(vtt_oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", c->vtt_basename);
698 return AVERROR(EINVAL);
704 set_http_options(&options, c);
706 if (c->key_info_file) {
707 if ((err = hls_encryption_start(s)) < 0)
709 if ((err = av_dict_set(&options, "encryption_key", c->key_string, 0))
712 err = av_strlcpy(iv_string, c->iv_string, sizeof(iv_string));
714 snprintf(iv_string, sizeof(iv_string), "%032"PRIx64, c->sequence);
715 if ((err = av_dict_set(&options, "encryption_iv", iv_string, 0)) < 0)
718 filename = av_asprintf("crypto:%s", oc->filename);
720 err = AVERROR(ENOMEM);
723 err = s->io_open(s, &oc->pb, filename, AVIO_FLAG_WRITE, &options);
725 av_dict_free(&options);
729 if ((err = s->io_open(s, &oc->pb, oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
731 if (c->vtt_basename) {
732 set_http_options(&options, c);
733 if ((err = s->io_open(s, &vtt_oc->pb, vtt_oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
736 av_dict_free(&options);
738 /* We only require one PAT/PMT per segment. */
739 if (oc->oformat->priv_class && oc->priv_data) {
742 snprintf(period, sizeof(period), "%d", (INT_MAX / 2) - 1);
744 av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0);
745 av_opt_set(oc->priv_data, "sdt_period", period, 0);
746 av_opt_set(oc->priv_data, "pat_period", period, 0);
749 if (c->vtt_basename) {
750 err = avformat_write_header(vtt_oc,NULL);
757 av_dict_free(&options);
762 static int hls_write_header(AVFormatContext *s)
764 HLSContext *hls = s->priv_data;
767 const char *pattern = "%d.ts";
768 const char *pattern_localtime_fmt = "-%s.ts";
769 const char *vtt_pattern = "%d.vtt";
770 AVDictionary *options = NULL;
772 int vtt_basename_size;
774 hls->sequence = hls->start_sequence;
775 hls->recording_time = (hls->init_time ? hls->init_time : hls->time) * AV_TIME_BASE;
776 hls->start_pts = AV_NOPTS_VALUE;
778 if (hls->flags & HLS_PROGRAM_DATE_TIME) {
781 hls->initial_prog_date_time = now0;
784 if (hls->format_options_str) {
785 ret = av_dict_parse_string(&hls->format_options, hls->format_options_str, "=", ":", 0);
787 av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", hls->format_options_str);
792 for (i = 0; i < s->nb_streams; i++) {
794 s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
796 s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE;
799 if (hls->has_video > 1)
800 av_log(s, AV_LOG_WARNING,
801 "More than a single video stream present, "
802 "expect issues decoding it.\n");
804 hls->oformat = av_guess_format("mpegts", NULL, NULL);
807 ret = AVERROR_MUXER_NOT_FOUND;
811 if(hls->has_subtitle) {
812 hls->vtt_oformat = av_guess_format("webvtt", NULL, NULL);
814 ret = AVERROR_MUXER_NOT_FOUND;
819 if (hls->segment_filename) {
820 hls->basename = av_strdup(hls->segment_filename);
821 if (!hls->basename) {
822 ret = AVERROR(ENOMEM);
826 if (hls->flags & HLS_SINGLE_FILE)
829 if (hls->use_localtime) {
830 basename_size = strlen(s->filename) + strlen(pattern_localtime_fmt) + 1;
832 basename_size = strlen(s->filename) + strlen(pattern) + 1;
834 hls->basename = av_malloc(basename_size);
835 if (!hls->basename) {
836 ret = AVERROR(ENOMEM);
840 av_strlcpy(hls->basename, s->filename, basename_size);
842 p = strrchr(hls->basename, '.');
845 if (hls->use_localtime) {
846 av_strlcat(hls->basename, pattern_localtime_fmt, basename_size);
848 av_strlcat(hls->basename, pattern, basename_size);
852 if(hls->has_subtitle) {
854 if (hls->flags & HLS_SINGLE_FILE)
855 vtt_pattern = ".vtt";
856 vtt_basename_size = strlen(s->filename) + strlen(vtt_pattern) + 1;
857 hls->vtt_basename = av_malloc(vtt_basename_size);
858 if (!hls->vtt_basename) {
859 ret = AVERROR(ENOMEM);
862 hls->vtt_m3u8_name = av_malloc(vtt_basename_size);
863 if (!hls->vtt_m3u8_name ) {
864 ret = AVERROR(ENOMEM);
867 av_strlcpy(hls->vtt_basename, s->filename, vtt_basename_size);
868 p = strrchr(hls->vtt_basename, '.');
872 if( hls->subtitle_filename ) {
873 strcpy(hls->vtt_m3u8_name, hls->subtitle_filename);
875 strcpy(hls->vtt_m3u8_name, hls->vtt_basename);
876 av_strlcat(hls->vtt_m3u8_name, "_vtt.m3u8", vtt_basename_size);
878 av_strlcat(hls->vtt_basename, vtt_pattern, vtt_basename_size);
881 if ((ret = hls_mux_init(s)) < 0)
884 if (hls->flags & HLS_APPEND_LIST) {
885 parse_playlist(s, s->filename);
886 if (hls->init_time > 0) {
887 av_log(s, AV_LOG_WARNING, "append_list mode does not support hls_init_time,"
888 " hls_init_time value will have no effect\n");
890 hls->recording_time = hls->time * AV_TIME_BASE;
894 if ((ret = hls_start(s)) < 0)
897 av_dict_copy(&options, hls->format_options, 0);
898 ret = avformat_write_header(hls->avf, &options);
899 if (av_dict_count(options)) {
900 av_log(s, AV_LOG_ERROR, "Some of provided format options in '%s' are not recognized\n", hls->format_options_str);
901 ret = AVERROR(EINVAL);
904 //av_assert0(s->nb_streams == hls->avf->nb_streams);
905 for (i = 0; i < s->nb_streams; i++) {
907 AVStream *outer_st = s->streams[i];
909 if (hls->max_seg_size > 0) {
910 if ((outer_st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
911 (outer_st->codecpar->bit_rate > hls->max_seg_size)) {
912 av_log(s, AV_LOG_WARNING, "Your video bitrate is bigger than hls_segment_size, "
913 "(%"PRId64 " > %"PRId64 "), the result maybe not be what you want.",
914 outer_st->codecpar->bit_rate, hls->max_seg_size);
918 if (outer_st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
919 inner_st = hls->avf->streams[i];
920 else if (hls->vtt_avf)
921 inner_st = hls->vtt_avf->streams[0];
923 /* We have a subtitle stream, when the user does not want one */
927 avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
931 av_dict_free(&options);
933 av_freep(&hls->basename);
934 av_freep(&hls->vtt_basename);
936 avformat_free_context(hls->avf);
938 avformat_free_context(hls->vtt_avf);
944 static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
946 HLSContext *hls = s->priv_data;
947 AVFormatContext *oc = NULL;
948 AVStream *st = s->streams[pkt->stream_index];
949 int64_t end_pts = hls->recording_time * hls->number;
951 int ret, can_split = 1;
952 int stream_index = 0;
954 if (hls->sequence - hls->nb_entries > hls->start_sequence && hls->init_time > 0) {
955 /* reset end_pts, hls->recording_time at end of the init hls list */
956 int init_list_dur = hls->init_time * hls->nb_entries * AV_TIME_BASE;
957 int after_init_list_dur = (hls->sequence - hls->nb_entries ) * hls->time * AV_TIME_BASE;
958 hls->recording_time = hls->time * AV_TIME_BASE;
959 end_pts = init_list_dur + after_init_list_dur ;
962 if( st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
967 stream_index = pkt->stream_index;
969 if (hls->start_pts == AV_NOPTS_VALUE) {
970 hls->start_pts = pkt->pts;
971 hls->end_pts = pkt->pts;
974 if (hls->has_video) {
975 can_split = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
976 ((pkt->flags & AV_PKT_FLAG_KEY) || (hls->flags & HLS_SPLIT_BY_TIME));
977 is_ref_pkt = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
979 if (pkt->pts == AV_NOPTS_VALUE)
980 is_ref_pkt = can_split = 0;
983 hls->duration = (double)(pkt->pts - hls->end_pts)
984 * st->time_base.num / st->time_base.den;
986 if (can_split && av_compare_ts(pkt->pts - hls->start_pts, st->time_base,
987 end_pts, AV_TIME_BASE_Q) >= 0) {
988 int64_t new_start_pos;
989 av_write_frame(oc, NULL); /* Flush any buffered data */
991 new_start_pos = avio_tell(hls->avf->pb);
992 hls->size = new_start_pos - hls->start_pos;
993 ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
994 hls->start_pos = new_start_pos;
998 hls->end_pts = pkt->pts;
1001 if (hls->flags & HLS_SINGLE_FILE) {
1002 if (hls->avf->oformat->priv_class && hls->avf->priv_data)
1003 av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
1005 } else if (hls->max_seg_size > 0) {
1006 if (hls->avf->oformat->priv_class && hls->avf->priv_data)
1007 av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
1008 if (hls->start_pos >= hls->max_seg_size) {
1010 ff_format_io_close(s, &oc->pb);
1012 ff_format_io_close(s, &hls->vtt_avf->pb);
1015 /* When split segment by byte, the duration is short than hls_time,
1016 * so it is not enough one segment duration as hls_time, */
1021 ff_format_io_close(s, &oc->pb);
1023 ff_format_io_close(s, &hls->vtt_avf->pb);
1031 if( st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE )
1036 if ((ret = hls_window(s, 0)) < 0)
1040 ret = ff_write_chained(oc, stream_index, pkt, s, 0);
1045 static int hls_write_trailer(struct AVFormatContext *s)
1047 HLSContext *hls = s->priv_data;
1048 AVFormatContext *oc = hls->avf;
1049 AVFormatContext *vtt_oc = hls->vtt_avf;
1051 av_write_trailer(oc);
1053 hls->size = avio_tell(hls->avf->pb) - hls->start_pos;
1054 ff_format_io_close(s, &oc->pb);
1055 hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
1060 av_write_trailer(vtt_oc);
1061 hls->size = avio_tell(hls->vtt_avf->pb) - hls->start_pos;
1062 ff_format_io_close(s, &vtt_oc->pb);
1064 av_freep(&hls->basename);
1065 avformat_free_context(oc);
1071 av_freep(&hls->vtt_basename);
1072 av_freep(&hls->vtt_m3u8_name);
1073 avformat_free_context(vtt_oc);
1076 hls_free_segments(hls->segments);
1077 hls_free_segments(hls->old_segments);
1081 #define OFFSET(x) offsetof(HLSContext, x)
1082 #define E AV_OPT_FLAG_ENCODING_PARAM
1083 static const AVOption options[] = {
1084 {"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
1085 {"hls_time", "set segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E},
1086 {"hls_init_time", "set segment length in seconds at init list", OFFSET(init_time), AV_OPT_TYPE_FLOAT, {.dbl = 0}, 0, FLT_MAX, E},
1087 {"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
1088 {"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},
1089 {"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},
1090 {"hls_wrap", "set number after which the index wraps", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
1091 {"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},
1092 {"hls_base_url", "url to prepend to each playlist entry", OFFSET(baseurl), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1093 {"hls_segment_filename", "filename template for segment files", OFFSET(segment_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1094 {"hls_segment_size", "maximum size per segment file, (in bytes)", OFFSET(max_seg_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
1095 {"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},
1096 {"hls_subtitle_path", "set path of hls subtitles", OFFSET(subtitle_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1097 {"hls_flags", "set flags affecting HLS playlist and media file generation", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0 }, 0, UINT_MAX, E, "flags"},
1098 {"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"},
1099 {"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"},
1100 {"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, "flags"},
1101 {"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, "flags"},
1102 {"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, "flags"},
1103 {"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"},
1104 {"append_list", "append the new segments into old hls segment list", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_APPEND_LIST }, 0, UINT_MAX, E, "flags"},
1105 {"program_date_time", "add EXT-X-PROGRAM-DATE-TIME", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_PROGRAM_DATE_TIME }, 0, UINT_MAX, E, "flags"},
1106 {"use_localtime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1107 {"use_localtime_mkdir", "create last directory component in strftime-generated filename", OFFSET(use_localtime_mkdir), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1108 {"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" },
1109 {"event", "EVENT playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_EVENT }, INT_MIN, INT_MAX, E, "pl_type" },
1110 {"vod", "VOD playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_VOD }, INT_MIN, INT_MAX, E, "pl_type" },
1111 {"method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1116 static const AVClass hls_class = {
1117 .class_name = "hls muxer",
1118 .item_name = av_default_item_name,
1120 .version = LIBAVUTIL_VERSION_INT,
1124 AVOutputFormat ff_hls_muxer = {
1126 .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
1127 .extensions = "m3u8",
1128 .priv_data_size = sizeof(HLSContext),
1129 .audio_codec = AV_CODEC_ID_AAC,
1130 .video_codec = AV_CODEC_ID_H264,
1131 .subtitle_codec = AV_CODEC_ID_WEBVTT,
1132 .flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH,
1133 .write_header = hls_write_header,
1134 .write_packet = hls_write_packet,
1135 .write_trailer = hls_write_trailer,
1136 .priv_class = &hls_class,