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 HLS_START_SEQUENCE_AS_START_NUMBER = 0,
44 HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH = 1,
45 HLS_START_SEQUENCE_AS_FORMATTED_DATETIME = 2, // YYYYMMDDhhmmss
46 } StartSequenceSourceType;
49 #define LINE_BUFFER_SIZE 1024
50 #define HLS_MICROSECOND_UNIT 1000000
52 typedef struct HLSSegment {
54 char sub_filename[1024];
55 double duration; /* in seconds */
60 char key_uri[LINE_BUFFER_SIZE + 1];
61 char iv_string[KEYSIZE*2 + 1];
63 struct HLSSegment *next;
66 typedef enum HLSFlags {
67 // Generate a single media file and use byte ranges in the playlist.
68 HLS_SINGLE_FILE = (1 << 0),
69 HLS_DELETE_SEGMENTS = (1 << 1),
70 HLS_ROUND_DURATIONS = (1 << 2),
71 HLS_DISCONT_START = (1 << 3),
72 HLS_OMIT_ENDLIST = (1 << 4),
73 HLS_SPLIT_BY_TIME = (1 << 5),
74 HLS_APPEND_LIST = (1 << 6),
75 HLS_PROGRAM_DATE_TIME = (1 << 7),
76 HLS_SECOND_LEVEL_SEGMENT_INDEX = (1 << 8), // include segment index in segment filenames when use_localtime e.g.: %%03d
77 HLS_SECOND_LEVEL_SEGMENT_DURATION = (1 << 9), // include segment duration (microsec) in segment filenames when use_localtime e.g.: %%09t
78 HLS_SECOND_LEVEL_SEGMENT_SIZE = (1 << 10), // include segment size (bytes) in segment filenames when use_localtime e.g.: %%014s
79 HLS_TEMP_FILE = (1 << 11),
89 typedef struct HLSContext {
90 const AVClass *class; // Class for private options.
93 int64_t start_sequence;
94 uint32_t start_sequence_source_type; // enum StartSequenceSourceType
95 AVOutputFormat *oformat;
96 AVOutputFormat *vtt_oformat;
99 AVFormatContext *vtt_avf;
101 float time; // Set by a private option.
102 float init_time; // Set by a private option.
103 int max_nb_segments; // Set by a private option.
104 int wrap; // Set by a private option.
105 uint32_t flags; // enum HLSFlags
106 uint32_t pl_type; // enum PlaylistType
107 char *segment_filename;
109 int use_localtime; ///< flag to expand filename with localtime
110 int use_localtime_mkdir;///< flag to mkdir dirname in timebased filename
112 int64_t recording_time;
116 double dpp; // duration per packet
119 double duration; // last segment duration computed so far, in seconds
120 int64_t start_pos; // last segment starting position
121 int64_t size; // last segment size
122 int64_t max_seg_size; // every segment file max size
124 int discontinuity_set;
127 HLSSegment *segments;
128 HLSSegment *last_segment;
129 HLSSegment *old_segments;
135 char *format_options_str;
136 char *vtt_format_options_str;
137 char *subtitle_filename;
138 AVDictionary *format_options;
141 char key_file[LINE_BUFFER_SIZE + 1];
142 char key_uri[LINE_BUFFER_SIZE + 1];
143 char key_string[KEYSIZE*2 + 1];
144 char iv_string[KEYSIZE*2 + 1];
145 AVDictionary *vtt_format_options;
149 double initial_prog_date_time;
150 char current_segment_final_filename_fmt[1024]; // when renaming segments
153 static int get_int_from_double(double val)
155 return (int)((val - (int)val) >= 0.001) ? (int)(val + 1) : (int)val;
158 static int mkdir_p(const char *path) {
160 char *temp = av_strdup(path);
164 if (!path || !temp) {
168 if (!strncmp(temp, "/", 1) || !strncmp(temp, "\\", 1)) {
170 } else if (!strncmp(temp, "./", 2) || !strncmp(temp, ".\\", 2)) {
174 for ( ; *pos != '\0'; ++pos) {
175 if (*pos == '/' || *pos == '\\') {
178 ret = mkdir(temp, 0755);
183 if ((*(pos - 1) != '/') || (*(pos - 1) != '\\')) {
184 ret = mkdir(temp, 0755);
191 static int replace_int_data_in_filename(char *buf, int buf_size, const char *filename, char placeholder, int64_t number)
194 char *q, buf1[20], c;
195 int nd, len, addchar_count;
204 if (c == '%' && *(p+1) == '%') // %%
206 else if (c == '%' && (av_isdigit(*(p+1)) || *(p+1) == placeholder)) {
209 while (av_isdigit(*(p + addchar_count))) {
210 nd = nd * 10 + *(p + addchar_count) - '0';
214 if (*(p + addchar_count) == placeholder) {
215 len = snprintf(buf1, sizeof(buf1), "%0*"PRId64, (number < 0) ? nd : nd++, number);
216 if (len < 1) // returned error or empty buf1
218 if ((q - buf + len) > buf_size - 1)
220 memcpy(q, buf1, len);
222 p += (addchar_count + 1);
230 while (addchar_count--)
231 if ((q - buf) < buf_size - 1)
243 static int hls_delete_old_segments(HLSContext *hls) {
245 HLSSegment *segment, *previous_segment = NULL;
246 float playlist_duration = 0.0f;
247 int ret = 0, path_size, sub_path_size;
248 char *dirname = NULL, *p, *sub_path;
250 AVDictionary *options = NULL;
251 AVIOContext *out = NULL;
253 segment = hls->segments;
255 playlist_duration += segment->duration;
256 segment = segment->next;
259 segment = hls->old_segments;
261 playlist_duration -= segment->duration;
262 previous_segment = segment;
263 segment = previous_segment->next;
264 if (playlist_duration <= -previous_segment->duration) {
265 previous_segment->next = NULL;
270 if (segment && !hls->use_localtime_mkdir) {
271 if (hls->segment_filename) {
272 dirname = av_strdup(hls->segment_filename);
274 dirname = av_strdup(hls->avf->filename);
277 ret = AVERROR(ENOMEM);
280 p = (char *)av_basename(dirname);
285 av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n",
287 path_size = (hls->use_localtime_mkdir ? 0 : strlen(dirname)) + strlen(segment->filename) + 1;
288 path = av_malloc(path_size);
290 ret = AVERROR(ENOMEM);
294 if (hls->use_localtime_mkdir)
295 av_strlcpy(path, segment->filename, path_size);
296 else { // segment->filename contains basename only
297 av_strlcpy(path, dirname, path_size);
298 av_strlcat(path, segment->filename, path_size);
302 av_dict_set(&options, "method", "DELETE", 0);
303 if ((ret = hls->avf->io_open(hls->avf, &out, path, AVIO_FLAG_WRITE, &options)) < 0)
305 ff_format_io_close(hls->avf, &out);
306 } else if (unlink(path) < 0) {
307 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
308 path, strerror(errno));
311 if ((segment->sub_filename[0] != '\0')) {
312 sub_path_size = strlen(segment->sub_filename) + 1 + (dirname ? strlen(dirname) : 0);
313 sub_path = av_malloc(sub_path_size);
315 ret = AVERROR(ENOMEM);
319 av_strlcpy(sub_path, dirname, sub_path_size);
320 av_strlcat(sub_path, segment->sub_filename, sub_path_size);
323 av_dict_set(&options, "method", "DELETE", 0);
324 if ((ret = hls->avf->io_open(hls->avf, &out, sub_path, AVIO_FLAG_WRITE, &options)) < 0) {
328 ff_format_io_close(hls->avf, &out);
329 } else if (unlink(sub_path) < 0) {
330 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
331 sub_path, strerror(errno));
336 previous_segment = segment;
337 segment = previous_segment->next;
338 av_free(previous_segment);
348 static int hls_encryption_start(AVFormatContext *s)
350 HLSContext *hls = s->priv_data;
353 uint8_t key[KEYSIZE];
355 if ((ret = s->io_open(s, &pb, hls->key_info_file, AVIO_FLAG_READ, NULL)) < 0) {
356 av_log(hls, AV_LOG_ERROR,
357 "error opening key info file %s\n", hls->key_info_file);
361 ff_get_line(pb, hls->key_uri, sizeof(hls->key_uri));
362 hls->key_uri[strcspn(hls->key_uri, "\r\n")] = '\0';
364 ff_get_line(pb, hls->key_file, sizeof(hls->key_file));
365 hls->key_file[strcspn(hls->key_file, "\r\n")] = '\0';
367 ff_get_line(pb, hls->iv_string, sizeof(hls->iv_string));
368 hls->iv_string[strcspn(hls->iv_string, "\r\n")] = '\0';
370 ff_format_io_close(s, &pb);
372 if (!*hls->key_uri) {
373 av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
374 return AVERROR(EINVAL);
377 if (!*hls->key_file) {
378 av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
379 return AVERROR(EINVAL);
382 if ((ret = s->io_open(s, &pb, hls->key_file, AVIO_FLAG_READ, NULL)) < 0) {
383 av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", hls->key_file);
387 ret = avio_read(pb, key, sizeof(key));
388 ff_format_io_close(s, &pb);
389 if (ret != sizeof(key)) {
390 av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", hls->key_file);
391 if (ret >= 0 || ret == AVERROR_EOF)
392 ret = AVERROR(EINVAL);
395 ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
400 static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
402 int len = ff_get_line(s, buf, maxlen);
403 while (len > 0 && av_isspace(buf[len - 1]))
408 static int hls_mux_init(AVFormatContext *s)
410 HLSContext *hls = s->priv_data;
412 AVFormatContext *vtt_oc = NULL;
415 ret = avformat_alloc_output_context2(&hls->avf, hls->oformat, NULL, NULL);
420 oc->filename[0] = '\0';
421 oc->oformat = hls->oformat;
422 oc->interrupt_callback = s->interrupt_callback;
423 oc->max_delay = s->max_delay;
424 oc->opaque = s->opaque;
425 oc->io_open = s->io_open;
426 oc->io_close = s->io_close;
427 av_dict_copy(&oc->metadata, s->metadata, 0);
429 if(hls->vtt_oformat) {
430 ret = avformat_alloc_output_context2(&hls->vtt_avf, hls->vtt_oformat, NULL, NULL);
433 vtt_oc = hls->vtt_avf;
434 vtt_oc->oformat = hls->vtt_oformat;
435 av_dict_copy(&vtt_oc->metadata, s->metadata, 0);
438 for (i = 0; i < s->nb_streams; i++) {
440 AVFormatContext *loc;
441 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
446 if (!(st = avformat_new_stream(loc, NULL)))
447 return AVERROR(ENOMEM);
448 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
449 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
450 st->time_base = s->streams[i]->time_base;
458 static HLSSegment *find_segment_by_filename(HLSSegment *segment, const char *filename)
461 if (!av_strcasecmp(segment->filename,filename))
463 segment = segment->next;
465 return (HLSSegment *) NULL;
468 /* Create a new segment and append it to the segment list */
469 static int hls_append_segment(struct AVFormatContext *s, HLSContext *hls, double duration,
470 int64_t pos, int64_t size)
472 HLSSegment *en = av_malloc(sizeof(*en));
473 const char *filename;
477 return AVERROR(ENOMEM);
479 if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
480 strlen(hls->current_segment_final_filename_fmt)) {
481 av_strlcpy(hls->avf->filename, hls->current_segment_final_filename_fmt, sizeof(hls->avf->filename));
482 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
483 char * filename = av_strdup(hls->avf->filename); // %%s will be %s after strftime
486 return AVERROR(ENOMEM);
488 if (replace_int_data_in_filename(hls->avf->filename, sizeof(hls->avf->filename),
489 filename, 's', pos + size) < 1) {
490 av_log(hls, AV_LOG_ERROR,
491 "Invalid second level segment filename template '%s', "
492 "you can try to remove second_level_segment_size flag\n",
496 return AVERROR(EINVAL);
500 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
501 char * filename = av_strdup(hls->avf->filename); // %%t will be %t after strftime
504 return AVERROR(ENOMEM);
506 if (replace_int_data_in_filename(hls->avf->filename, sizeof(hls->avf->filename),
507 filename, 't', (int64_t)round(duration * HLS_MICROSECOND_UNIT)) < 1) {
508 av_log(hls, AV_LOG_ERROR,
509 "Invalid second level segment filename template '%s', "
510 "you can try to remove second_level_segment_time flag\n",
514 return AVERROR(EINVAL);
521 filename = av_basename(hls->avf->filename);
523 if (hls->use_localtime_mkdir) {
524 filename = hls->avf->filename;
526 if (find_segment_by_filename(hls->segments, filename)
527 || find_segment_by_filename(hls->old_segments, filename)) {
528 av_log(hls, AV_LOG_WARNING, "Duplicated segment filename detected: %s\n", filename);
530 av_strlcpy(en->filename, filename, sizeof(en->filename));
532 if(hls->has_subtitle)
533 av_strlcpy(en->sub_filename, av_basename(hls->vtt_avf->filename), sizeof(en->sub_filename));
535 en->sub_filename[0] = '\0';
537 en->duration = duration;
543 if (hls->discontinuity) {
545 hls->discontinuity = 0;
548 if (hls->key_info_file) {
549 av_strlcpy(en->key_uri, hls->key_uri, sizeof(en->key_uri));
550 av_strlcpy(en->iv_string, hls->iv_string, sizeof(en->iv_string));
556 hls->last_segment->next = en;
558 hls->last_segment = en;
560 // EVENT or VOD playlists imply sliding window cannot be used
561 if (hls->pl_type != PLAYLIST_TYPE_NONE)
562 hls->max_nb_segments = 0;
564 if (hls->max_nb_segments && hls->nb_entries >= hls->max_nb_segments) {
566 hls->initial_prog_date_time += en->duration;
567 hls->segments = en->next;
568 if (en && hls->flags & HLS_DELETE_SEGMENTS &&
569 !(hls->flags & HLS_SINGLE_FILE || hls->wrap)) {
570 en->next = hls->old_segments;
571 hls->old_segments = en;
572 if ((ret = hls_delete_old_segments(hls)) < 0)
579 if (hls->max_seg_size > 0) {
587 static int parse_playlist(AVFormatContext *s, const char *url)
589 HLSContext *hls = s->priv_data;
591 int ret = 0, is_segment = 0;
592 int64_t new_start_pos;
596 if ((ret = ffio_open_whitelist(&in, url, AVIO_FLAG_READ,
597 &s->interrupt_callback, NULL,
598 s->protocol_whitelist, s->protocol_blacklist)) < 0)
601 read_chomp_line(in, line, sizeof(line));
602 if (strcmp(line, "#EXTM3U")) {
603 ret = AVERROR_INVALIDDATA;
607 hls->discontinuity = 0;
608 while (!avio_feof(in)) {
609 read_chomp_line(in, line, sizeof(line));
610 if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
611 int64_t tmp_sequence = strtoll(ptr, NULL, 10);
612 if (tmp_sequence < hls->sequence)
613 av_log(hls, AV_LOG_VERBOSE,
614 "Found playlist sequence number was smaller """
615 "than specified start sequence number: %"PRId64" < %"PRId64", "
616 "omitting\n", tmp_sequence, hls->start_sequence);
618 av_log(hls, AV_LOG_DEBUG, "Found playlist sequence number: %"PRId64"\n", tmp_sequence);
619 hls->sequence = tmp_sequence;
621 } else if (av_strstart(line, "#EXT-X-DISCONTINUITY", &ptr)) {
623 hls->discontinuity = 1;
624 } else if (av_strstart(line, "#EXTINF:", &ptr)) {
626 hls->duration = atof(ptr);
627 } else if (av_strstart(line, "#", NULL)) {
629 } else if (line[0]) {
632 new_start_pos = avio_tell(hls->avf->pb);
633 hls->size = new_start_pos - hls->start_pos;
634 av_strlcpy(hls->avf->filename, line, sizeof(line));
635 ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
638 hls->start_pos = new_start_pos;
648 static void hls_free_segments(HLSSegment *p)
659 static void set_http_options(AVDictionary **options, HLSContext *c)
662 av_dict_set(options, "method", c->method, 0);
665 static void write_m3u8_head_block(HLSContext *hls, AVIOContext *out, int version,
666 int target_duration, int64_t sequence)
668 avio_printf(out, "#EXTM3U\n");
669 avio_printf(out, "#EXT-X-VERSION:%d\n", version);
670 if (hls->allowcache == 0 || hls->allowcache == 1) {
671 avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
673 avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
674 avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
675 av_log(hls, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
678 static int hls_window(AVFormatContext *s, int last)
680 HLSContext *hls = s->priv_data;
682 int target_duration = 0;
684 AVIOContext *out = NULL;
685 AVIOContext *sub_out = NULL;
686 char temp_filename[1024];
687 int64_t sequence = FFMAX(hls->start_sequence, hls->sequence - hls->nb_entries);
689 const char *proto = avio_find_protocol_name(s->filename);
690 int use_rename = proto && !strcmp(proto, "file");
691 static unsigned warned_non_file;
692 char *key_uri = NULL;
693 char *iv_string = NULL;
694 AVDictionary *options = NULL;
695 double prog_date_time = hls->initial_prog_date_time;
696 int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
698 if (byterange_mode) {
703 if (!use_rename && !warned_non_file++)
704 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
706 set_http_options(&options, hls);
707 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
708 if ((ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, &options)) < 0)
711 for (en = hls->segments; en; en = en->next) {
712 if (target_duration <= en->duration)
713 target_duration = get_int_from_double(en->duration);
716 hls->discontinuity_set = 0;
717 write_m3u8_head_block(hls, out, version, target_duration, sequence);
718 if (hls->pl_type == PLAYLIST_TYPE_EVENT) {
719 avio_printf(out, "#EXT-X-PLAYLIST-TYPE:EVENT\n");
720 } else if (hls->pl_type == PLAYLIST_TYPE_VOD) {
721 avio_printf(out, "#EXT-X-PLAYLIST-TYPE:VOD\n");
724 if((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && hls->discontinuity_set==0 ){
725 avio_printf(out, "#EXT-X-DISCONTINUITY\n");
726 hls->discontinuity_set = 1;
728 for (en = hls->segments; en; en = en->next) {
729 if (hls->key_info_file && (!key_uri || strcmp(en->key_uri, key_uri) ||
730 av_strcasecmp(en->iv_string, iv_string))) {
731 avio_printf(out, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"", en->key_uri);
733 avio_printf(out, ",IV=0x%s", en->iv_string);
734 avio_printf(out, "\n");
735 key_uri = en->key_uri;
736 iv_string = en->iv_string;
740 avio_printf(out, "#EXT-X-DISCONTINUITY\n");
743 if (hls->flags & HLS_ROUND_DURATIONS)
744 avio_printf(out, "#EXTINF:%ld,\n", lrint(en->duration));
746 avio_printf(out, "#EXTINF:%f,\n", en->duration);
748 avio_printf(out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
750 if (hls->flags & HLS_PROGRAM_DATE_TIME) {
751 time_t tt, wrongsecs;
753 struct tm *tm, tmpbuf;
754 char buf0[128], buf1[128];
755 tt = (int64_t)prog_date_time;
756 milli = av_clip(lrint(1000*(prog_date_time - tt)), 0, 999);
757 tm = localtime_r(&tt, &tmpbuf);
758 strftime(buf0, sizeof(buf0), "%Y-%m-%dT%H:%M:%S", tm);
759 if (!strftime(buf1, sizeof(buf1), "%z", tm) || buf1[1]<'0' ||buf1[1]>'2') {
760 int tz_min, dst = tm->tm_isdst;
761 tm = gmtime_r(&tt, &tmpbuf);
763 wrongsecs = mktime(tm);
764 tz_min = (abs(wrongsecs - tt) + 30) / 60;
765 snprintf(buf1, sizeof(buf1),
767 wrongsecs <= tt ? '+' : '-',
771 avio_printf(out, "#EXT-X-PROGRAM-DATE-TIME:%s.%03d%s\n", buf0, milli, buf1);
772 prog_date_time += en->duration;
775 avio_printf(out, "%s", hls->baseurl);
776 avio_printf(out, "%s\n", en->filename);
779 if (last && (hls->flags & HLS_OMIT_ENDLIST)==0)
780 avio_printf(out, "#EXT-X-ENDLIST\n");
782 if( hls->vtt_m3u8_name ) {
783 if ((ret = s->io_open(s, &sub_out, hls->vtt_m3u8_name, AVIO_FLAG_WRITE, &options)) < 0)
785 write_m3u8_head_block(hls, sub_out, version, target_duration, sequence);
787 for (en = hls->segments; en; en = en->next) {
788 avio_printf(sub_out, "#EXTINF:%f,\n", en->duration);
790 avio_printf(sub_out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
793 avio_printf(sub_out, "%s", hls->baseurl);
794 avio_printf(sub_out, "%s\n", en->sub_filename);
798 avio_printf(sub_out, "#EXT-X-ENDLIST\n");
803 av_dict_free(&options);
804 ff_format_io_close(s, &out);
805 ff_format_io_close(s, &sub_out);
806 if (ret >= 0 && use_rename)
807 ff_rename(temp_filename, s->filename, s);
811 static int hls_start(AVFormatContext *s)
813 HLSContext *c = s->priv_data;
814 AVFormatContext *oc = c->avf;
815 AVFormatContext *vtt_oc = c->vtt_avf;
816 AVDictionary *options = NULL;
817 char *filename, iv_string[KEYSIZE*2 + 1];
820 if ((c->flags & HLS_TEMP_FILE) && oc->filename[0] != 0) {
821 size_t len = strlen(oc->filename);
822 char final_filename[sizeof(oc->filename)];
823 av_strlcpy(final_filename, oc->filename, len);
824 final_filename[len-4] = '\0';
825 ff_rename(oc->filename, final_filename, s);
826 oc->filename[len-4] = '\0';
829 if (c->flags & HLS_SINGLE_FILE) {
830 av_strlcpy(oc->filename, c->basename,
831 sizeof(oc->filename));
833 av_strlcpy(vtt_oc->filename, c->vtt_basename,
834 sizeof(vtt_oc->filename));
835 } else if (c->max_seg_size > 0) {
836 if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
837 c->basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
838 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s', you can try to use -use_localtime 1 with it\n", c->basename);
839 return AVERROR(EINVAL);
842 if (c->use_localtime) {
844 struct tm *tm, tmpbuf;
846 tm = localtime_r(&now0, &tmpbuf);
847 if (!strftime(oc->filename, sizeof(oc->filename), c->basename, tm)) {
848 av_log(oc, AV_LOG_ERROR, "Could not get segment filename with use_localtime\n");
849 return AVERROR(EINVAL);
851 if (c->flags & HLS_SECOND_LEVEL_SEGMENT_INDEX) {
852 char * filename = av_strdup(oc->filename); // %%d will be %d after strftime
854 return AVERROR(ENOMEM);
855 if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
856 filename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
857 av_log(c, AV_LOG_ERROR,
858 "Invalid second level segment filename template '%s', "
859 "you can try to remove second_level_segment_index flag\n",
862 return AVERROR(EINVAL);
866 if (c->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) {
867 av_strlcpy(c->current_segment_final_filename_fmt, oc->filename,
868 sizeof(c->current_segment_final_filename_fmt));
869 if (c->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
870 char * filename = av_strdup(oc->filename); // %%s will be %s after strftime
872 return AVERROR(ENOMEM);
873 if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename), filename, 's', 0) < 1) {
874 av_log(c, AV_LOG_ERROR,
875 "Invalid second level segment filename template '%s', "
876 "you can try to remove second_level_segment_size flag\n",
879 return AVERROR(EINVAL);
883 if (c->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
884 char * filename = av_strdup(oc->filename); // %%t will be %t after strftime
886 return AVERROR(ENOMEM);
887 if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename), filename, 't', 0) < 1) {
888 av_log(c, AV_LOG_ERROR,
889 "Invalid second level segment filename template '%s', "
890 "you can try to remove second_level_segment_time flag\n",
893 return AVERROR(EINVAL);
898 if (c->use_localtime_mkdir) {
900 char *fn_copy = av_strdup(oc->filename);
902 return AVERROR(ENOMEM);
904 dir = av_dirname(fn_copy);
905 if (mkdir_p(dir) == -1 && errno != EEXIST) {
906 av_log(oc, AV_LOG_ERROR, "Could not create directory %s with use_localtime_mkdir\n", dir);
908 return AVERROR(errno);
912 } else if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
913 c->basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
914 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try to use -use_localtime 1 with it\n", c->basename);
915 return AVERROR(EINVAL);
917 if( c->vtt_basename) {
918 if (replace_int_data_in_filename(vtt_oc->filename, sizeof(vtt_oc->filename),
919 c->vtt_basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
920 av_log(vtt_oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", c->vtt_basename);
921 return AVERROR(EINVAL);
927 set_http_options(&options, c);
929 if (c->flags & HLS_TEMP_FILE) {
930 av_strlcat(oc->filename, ".tmp", sizeof(oc->filename));
933 if (c->key_info_file) {
934 if ((err = hls_encryption_start(s)) < 0)
936 if ((err = av_dict_set(&options, "encryption_key", c->key_string, 0))
939 err = av_strlcpy(iv_string, c->iv_string, sizeof(iv_string));
941 snprintf(iv_string, sizeof(iv_string), "%032"PRIx64, c->sequence);
942 if ((err = av_dict_set(&options, "encryption_iv", iv_string, 0)) < 0)
945 filename = av_asprintf("crypto:%s", oc->filename);
947 err = AVERROR(ENOMEM);
950 err = s->io_open(s, &oc->pb, filename, AVIO_FLAG_WRITE, &options);
952 av_dict_free(&options);
956 if ((err = s->io_open(s, &oc->pb, oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
958 if (c->vtt_basename) {
959 set_http_options(&options, c);
960 if ((err = s->io_open(s, &vtt_oc->pb, vtt_oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
963 av_dict_free(&options);
965 /* We only require one PAT/PMT per segment. */
966 if (oc->oformat->priv_class && oc->priv_data) {
969 snprintf(period, sizeof(period), "%d", (INT_MAX / 2) - 1);
971 av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0);
972 av_opt_set(oc->priv_data, "sdt_period", period, 0);
973 av_opt_set(oc->priv_data, "pat_period", period, 0);
976 if (c->vtt_basename) {
977 err = avformat_write_header(vtt_oc,NULL);
984 av_dict_free(&options);
989 static const char * get_default_pattern_localtime_fmt(void)
992 time_t t = time(NULL);
994 p = localtime_r(&t, &tmbuf);
995 // no %s support when strftime returned error or left format string unchanged
996 return (!strftime(b, sizeof(b), "%s", p) || !strcmp(b, "%s")) ? "-%Y%m%d%H%M%S.ts" : "-%s.ts";
999 static int hls_write_header(AVFormatContext *s)
1001 HLSContext *hls = s->priv_data;
1004 const char *pattern = "%d.ts";
1005 const char *pattern_localtime_fmt = get_default_pattern_localtime_fmt();
1006 const char *vtt_pattern = "%d.vtt";
1007 AVDictionary *options = NULL;
1009 int vtt_basename_size;
1011 if (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH || hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_FORMATTED_DATETIME) {
1012 time_t t = time(NULL); // we will need it in either case
1013 if (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH) {
1014 hls->start_sequence = (int64_t)t;
1015 } else if (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_FORMATTED_DATETIME) {
1017 struct tm *p, tmbuf;
1018 if (!(p = localtime_r(&t, &tmbuf)))
1019 return AVERROR(ENOMEM);
1020 if (!strftime(b, sizeof(b), "%Y%m%d%H%M%S", p))
1021 return AVERROR(ENOMEM);
1022 hls->start_sequence = strtoll(b, NULL, 10);
1024 av_log(hls, AV_LOG_DEBUG, "start_number evaluated to %"PRId64"\n", hls->start_sequence);
1027 hls->sequence = hls->start_sequence;
1028 hls->recording_time = (hls->init_time ? hls->init_time : hls->time) * AV_TIME_BASE;
1029 hls->start_pts = AV_NOPTS_VALUE;
1030 hls->current_segment_final_filename_fmt[0] = '\0';
1032 if (hls->flags & HLS_PROGRAM_DATE_TIME) {
1035 hls->initial_prog_date_time = now0;
1038 if (hls->format_options_str) {
1039 ret = av_dict_parse_string(&hls->format_options, hls->format_options_str, "=", ":", 0);
1041 av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", hls->format_options_str);
1046 for (i = 0; i < s->nb_streams; i++) {
1048 s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
1049 hls->has_subtitle +=
1050 s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE;
1053 if (hls->has_video > 1)
1054 av_log(s, AV_LOG_WARNING,
1055 "More than a single video stream present, "
1056 "expect issues decoding it.\n");
1058 hls->oformat = av_guess_format("mpegts", NULL, NULL);
1060 if (!hls->oformat) {
1061 ret = AVERROR_MUXER_NOT_FOUND;
1065 if(hls->has_subtitle) {
1066 hls->vtt_oformat = av_guess_format("webvtt", NULL, NULL);
1067 if (!hls->oformat) {
1068 ret = AVERROR_MUXER_NOT_FOUND;
1073 if (hls->segment_filename) {
1074 hls->basename = av_strdup(hls->segment_filename);
1075 if (!hls->basename) {
1076 ret = AVERROR(ENOMEM);
1080 if (hls->flags & HLS_SINGLE_FILE)
1083 if (hls->use_localtime) {
1084 basename_size = strlen(s->filename) + strlen(pattern_localtime_fmt) + 1;
1086 basename_size = strlen(s->filename) + strlen(pattern) + 1;
1088 hls->basename = av_malloc(basename_size);
1089 if (!hls->basename) {
1090 ret = AVERROR(ENOMEM);
1094 av_strlcpy(hls->basename, s->filename, basename_size);
1096 p = strrchr(hls->basename, '.');
1099 if (hls->use_localtime) {
1100 av_strlcat(hls->basename, pattern_localtime_fmt, basename_size);
1102 av_strlcat(hls->basename, pattern, basename_size);
1105 if (!hls->use_localtime) {
1106 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
1107 av_log(hls, AV_LOG_ERROR,
1108 "second_level_segment_duration hls_flag requires use_localtime to be true\n");
1109 ret = AVERROR(EINVAL);
1112 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
1113 av_log(hls, AV_LOG_ERROR,
1114 "second_level_segment_size hls_flag requires use_localtime to be true\n");
1115 ret = AVERROR(EINVAL);
1118 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_INDEX) {
1119 av_log(hls, AV_LOG_ERROR,
1120 "second_level_segment_index hls_flag requires use_localtime to be true\n");
1121 ret = AVERROR(EINVAL);
1125 const char *proto = avio_find_protocol_name(hls->basename);
1126 int segment_renaming_ok = proto && !strcmp(proto, "file");
1128 if ((hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) && !segment_renaming_ok) {
1129 av_log(hls, AV_LOG_ERROR,
1130 "second_level_segment_duration hls_flag works only with file protocol segment names\n");
1131 ret = AVERROR(EINVAL);
1134 if ((hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) && !segment_renaming_ok) {
1135 av_log(hls, AV_LOG_ERROR,
1136 "second_level_segment_size hls_flag works only with file protocol segment names\n");
1137 ret = AVERROR(EINVAL);
1141 if(hls->has_subtitle) {
1143 if (hls->flags & HLS_SINGLE_FILE)
1144 vtt_pattern = ".vtt";
1145 vtt_basename_size = strlen(s->filename) + strlen(vtt_pattern) + 1;
1146 hls->vtt_basename = av_malloc(vtt_basename_size);
1147 if (!hls->vtt_basename) {
1148 ret = AVERROR(ENOMEM);
1151 hls->vtt_m3u8_name = av_malloc(vtt_basename_size);
1152 if (!hls->vtt_m3u8_name ) {
1153 ret = AVERROR(ENOMEM);
1156 av_strlcpy(hls->vtt_basename, s->filename, vtt_basename_size);
1157 p = strrchr(hls->vtt_basename, '.');
1161 if( hls->subtitle_filename ) {
1162 strcpy(hls->vtt_m3u8_name, hls->subtitle_filename);
1164 strcpy(hls->vtt_m3u8_name, hls->vtt_basename);
1165 av_strlcat(hls->vtt_m3u8_name, "_vtt.m3u8", vtt_basename_size);
1167 av_strlcat(hls->vtt_basename, vtt_pattern, vtt_basename_size);
1170 if ((ret = hls_mux_init(s)) < 0)
1173 if (hls->flags & HLS_APPEND_LIST) {
1174 parse_playlist(s, s->filename);
1175 hls->discontinuity = 1;
1176 if (hls->init_time > 0) {
1177 av_log(s, AV_LOG_WARNING, "append_list mode does not support hls_init_time,"
1178 " hls_init_time value will have no effect\n");
1180 hls->recording_time = hls->time * AV_TIME_BASE;
1184 if ((ret = hls_start(s)) < 0)
1187 av_dict_copy(&options, hls->format_options, 0);
1188 ret = avformat_write_header(hls->avf, &options);
1189 if (av_dict_count(options)) {
1190 av_log(s, AV_LOG_ERROR, "Some of provided format options in '%s' are not recognized\n", hls->format_options_str);
1191 ret = AVERROR(EINVAL);
1194 //av_assert0(s->nb_streams == hls->avf->nb_streams);
1195 for (i = 0; i < s->nb_streams; i++) {
1197 AVStream *outer_st = s->streams[i];
1199 if (hls->max_seg_size > 0) {
1200 if ((outer_st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1201 (outer_st->codecpar->bit_rate > hls->max_seg_size)) {
1202 av_log(s, AV_LOG_WARNING, "Your video bitrate is bigger than hls_segment_size, "
1203 "(%"PRId64 " > %"PRId64 "), the result maybe not be what you want.",
1204 outer_st->codecpar->bit_rate, hls->max_seg_size);
1208 if (outer_st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
1209 inner_st = hls->avf->streams[i];
1210 else if (hls->vtt_avf)
1211 inner_st = hls->vtt_avf->streams[0];
1213 /* We have a subtitle stream, when the user does not want one */
1217 avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
1221 av_dict_free(&options);
1223 av_freep(&hls->basename);
1224 av_freep(&hls->vtt_basename);
1226 avformat_free_context(hls->avf);
1228 avformat_free_context(hls->vtt_avf);
1234 static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
1236 HLSContext *hls = s->priv_data;
1237 AVFormatContext *oc = NULL;
1238 AVStream *st = s->streams[pkt->stream_index];
1239 int64_t end_pts = hls->recording_time * hls->number;
1241 int ret, can_split = 1;
1242 int stream_index = 0;
1244 if (hls->sequence - hls->nb_entries > hls->start_sequence && hls->init_time > 0) {
1245 /* reset end_pts, hls->recording_time at end of the init hls list */
1246 int init_list_dur = hls->init_time * hls->nb_entries * AV_TIME_BASE;
1247 int after_init_list_dur = (hls->sequence - hls->nb_entries ) * hls->time * AV_TIME_BASE;
1248 hls->recording_time = hls->time * AV_TIME_BASE;
1249 end_pts = init_list_dur + after_init_list_dur ;
1252 if( st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
1257 stream_index = pkt->stream_index;
1259 if (hls->start_pts == AV_NOPTS_VALUE) {
1260 hls->start_pts = pkt->pts;
1261 hls->end_pts = pkt->pts;
1264 if (hls->has_video) {
1265 can_split = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1266 ((pkt->flags & AV_PKT_FLAG_KEY) || (hls->flags & HLS_SPLIT_BY_TIME));
1267 is_ref_pkt = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
1269 if (pkt->pts == AV_NOPTS_VALUE)
1270 is_ref_pkt = can_split = 0;
1273 if (hls->new_start) {
1275 hls->duration = (double)(pkt->pts - hls->end_pts)
1276 * st->time_base.num / st->time_base.den;
1277 hls->dpp = (double)(pkt->duration) * st->time_base.num / st->time_base.den;
1279 hls->duration += (double)(pkt->duration) * st->time_base.num / st->time_base.den;
1283 if (can_split && av_compare_ts(pkt->pts - hls->start_pts, st->time_base,
1284 end_pts, AV_TIME_BASE_Q) >= 0) {
1285 int64_t new_start_pos;
1286 char *old_filename = av_strdup(hls->avf->filename);
1288 if (!old_filename) {
1289 return AVERROR(ENOMEM);
1292 av_write_frame(oc, NULL); /* Flush any buffered data */
1294 new_start_pos = avio_tell(hls->avf->pb);
1295 hls->size = new_start_pos - hls->start_pos;
1296 ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
1297 hls->start_pos = new_start_pos;
1299 av_free(old_filename);
1303 hls->end_pts = pkt->pts;
1306 if (hls->flags & HLS_SINGLE_FILE) {
1307 if (hls->avf->oformat->priv_class && hls->avf->priv_data)
1308 av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
1310 } else if (hls->max_seg_size > 0) {
1311 if (hls->avf->oformat->priv_class && hls->avf->priv_data)
1312 av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
1313 if (hls->start_pos >= hls->max_seg_size) {
1315 ff_format_io_close(s, &oc->pb);
1316 if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
1317 strlen(hls->current_segment_final_filename_fmt)) {
1318 ff_rename(old_filename, hls->avf->filename, hls);
1321 ff_format_io_close(s, &hls->vtt_avf->pb);
1324 /* When split segment by byte, the duration is short than hls_time,
1325 * so it is not enough one segment duration as hls_time, */
1330 ff_format_io_close(s, &oc->pb);
1331 if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
1332 strlen(hls->current_segment_final_filename_fmt)) {
1333 ff_rename(old_filename, hls->avf->filename, hls);
1336 ff_format_io_close(s, &hls->vtt_avf->pb);
1342 av_free(old_filename);
1346 if ((ret = hls_window(s, 0)) < 0) {
1347 av_free(old_filename);
1352 ret = ff_write_chained(oc, stream_index, pkt, s, 0);
1357 static int hls_write_trailer(struct AVFormatContext *s)
1359 HLSContext *hls = s->priv_data;
1360 AVFormatContext *oc = hls->avf;
1361 AVFormatContext *vtt_oc = hls->vtt_avf;
1362 char *old_filename = av_strdup(hls->avf->filename);
1364 if (!old_filename) {
1365 return AVERROR(ENOMEM);
1369 av_write_trailer(oc);
1371 hls->size = avio_tell(hls->avf->pb) - hls->start_pos;
1372 ff_format_io_close(s, &oc->pb);
1373 /* after av_write_trailer, then duration + 1 duration per packet */
1374 hls_append_segment(s, hls, hls->duration + hls->dpp, hls->start_pos, hls->size);
1377 if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
1378 strlen(hls->current_segment_final_filename_fmt)) {
1379 ff_rename(old_filename, hls->avf->filename, hls);
1382 if ((hls->flags & HLS_TEMP_FILE) && oc->filename[0] != 0) {
1383 size_t len = strlen(oc->filename);
1384 char final_filename[sizeof(oc->filename)];
1385 av_strlcpy(final_filename, oc->filename, len);
1386 final_filename[len-4] = '\0';
1387 ff_rename(oc->filename, final_filename, s);
1388 oc->filename[len-4] = '\0';
1393 av_write_trailer(vtt_oc);
1394 hls->size = avio_tell(hls->vtt_avf->pb) - hls->start_pos;
1395 ff_format_io_close(s, &vtt_oc->pb);
1397 av_freep(&hls->basename);
1398 avformat_free_context(oc);
1404 av_freep(&hls->vtt_basename);
1405 av_freep(&hls->vtt_m3u8_name);
1406 avformat_free_context(vtt_oc);
1409 hls_free_segments(hls->segments);
1410 hls_free_segments(hls->old_segments);
1411 av_free(old_filename);
1415 #define OFFSET(x) offsetof(HLSContext, x)
1416 #define E AV_OPT_FLAG_ENCODING_PARAM
1417 static const AVOption options[] = {
1418 {"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
1419 {"hls_time", "set segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E},
1420 {"hls_init_time", "set segment length in seconds at init list", OFFSET(init_time), AV_OPT_TYPE_FLOAT, {.dbl = 0}, 0, FLT_MAX, E},
1421 {"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
1422 {"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},
1423 {"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},
1424 {"hls_wrap", "set number after which the index wraps", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
1425 {"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},
1426 {"hls_base_url", "url to prepend to each playlist entry", OFFSET(baseurl), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1427 {"hls_segment_filename", "filename template for segment files", OFFSET(segment_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1428 {"hls_segment_size", "maximum size per segment file, (in bytes)", OFFSET(max_seg_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
1429 {"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},
1430 {"hls_subtitle_path", "set path of hls subtitles", OFFSET(subtitle_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1431 {"hls_flags", "set flags affecting HLS playlist and media file generation", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0 }, 0, UINT_MAX, E, "flags"},
1432 {"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"},
1433 {"temp_file", "write segment to temporary file and rename when complete", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_TEMP_FILE }, 0, UINT_MAX, E, "flags"},
1434 {"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"},
1435 {"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, "flags"},
1436 {"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, "flags"},
1437 {"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, "flags"},
1438 {"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"},
1439 {"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"},
1440 {"program_date_time", "add EXT-X-PROGRAM-DATE-TIME", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_PROGRAM_DATE_TIME }, 0, UINT_MAX, E, "flags"},
1441 {"second_level_segment_index", "include segment index in segment filenames when use_localtime", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SECOND_LEVEL_SEGMENT_INDEX }, 0, UINT_MAX, E, "flags"},
1442 {"second_level_segment_duration", "include segment duration in segment filenames when use_localtime", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SECOND_LEVEL_SEGMENT_DURATION }, 0, UINT_MAX, E, "flags"},
1443 {"second_level_segment_size", "include segment size in segment filenames when use_localtime", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SECOND_LEVEL_SEGMENT_SIZE }, 0, UINT_MAX, E, "flags"},
1444 {"use_localtime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1445 {"use_localtime_mkdir", "create last directory component in strftime-generated filename", OFFSET(use_localtime_mkdir), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1446 {"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" },
1447 {"event", "EVENT playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_EVENT }, INT_MIN, INT_MAX, E, "pl_type" },
1448 {"vod", "VOD playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_VOD }, INT_MIN, INT_MAX, E, "pl_type" },
1449 {"method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1450 {"hls_start_number_source", "set source of first number in sequence", OFFSET(start_sequence_source_type), AV_OPT_TYPE_INT, {.i64 = HLS_START_SEQUENCE_AS_START_NUMBER }, 0, HLS_START_SEQUENCE_AS_FORMATTED_DATETIME, E, "start_sequence_source_type" },
1451 {"generic", "start_number value (default)", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_START_SEQUENCE_AS_START_NUMBER }, INT_MIN, INT_MAX, E, "start_sequence_source_type" },
1452 {"epoch", "seconds since epoch", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH }, INT_MIN, INT_MAX, E, "start_sequence_source_type" },
1453 {"datetime", "current datetime as YYYYMMDDhhmmss", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_START_SEQUENCE_AS_FORMATTED_DATETIME }, INT_MIN, INT_MAX, E, "start_sequence_source_type" },
1457 static const AVClass hls_class = {
1458 .class_name = "hls muxer",
1459 .item_name = av_default_item_name,
1461 .version = LIBAVUTIL_VERSION_INT,
1465 AVOutputFormat ff_hls_muxer = {
1467 .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
1468 .extensions = "m3u8",
1469 .priv_data_size = sizeof(HLSContext),
1470 .audio_codec = AV_CODEC_ID_AAC,
1471 .video_codec = AV_CODEC_ID_H264,
1472 .subtitle_codec = AV_CODEC_ID_WEBVTT,
1473 .flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH,
1474 .write_header = hls_write_header,
1475 .write_packet = hls_write_packet,
1476 .write_trailer = hls_write_trailer,
1477 .priv_class = &hls_class,