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.
105 int wrap; // Set by a private option.
107 uint32_t flags; // enum HLSFlags
108 uint32_t pl_type; // enum PlaylistType
109 char *segment_filename;
111 int use_localtime; ///< flag to expand filename with localtime
112 int use_localtime_mkdir;///< flag to mkdir dirname in timebased filename
114 int64_t recording_time;
118 double dpp; // duration per packet
121 double duration; // last segment duration computed so far, in seconds
122 int64_t start_pos; // last segment starting position
123 int64_t size; // last segment size
124 int64_t max_seg_size; // every segment file max size
126 int discontinuity_set;
129 HLSSegment *segments;
130 HLSSegment *last_segment;
131 HLSSegment *old_segments;
137 char *format_options_str;
138 char *vtt_format_options_str;
139 char *subtitle_filename;
140 AVDictionary *format_options;
143 char key_file[LINE_BUFFER_SIZE + 1];
144 char key_uri[LINE_BUFFER_SIZE + 1];
145 char key_string[KEYSIZE*2 + 1];
146 char iv_string[KEYSIZE*2 + 1];
147 AVDictionary *vtt_format_options;
151 double initial_prog_date_time;
152 char current_segment_final_filename_fmt[1024]; // when renaming segments
155 static int get_int_from_double(double val)
157 return (int)((val - (int)val) >= 0.001) ? (int)(val + 1) : (int)val;
160 static int mkdir_p(const char *path) {
162 char *temp = av_strdup(path);
166 if (!path || !temp) {
170 if (!strncmp(temp, "/", 1) || !strncmp(temp, "\\", 1)) {
172 } else if (!strncmp(temp, "./", 2) || !strncmp(temp, ".\\", 2)) {
176 for ( ; *pos != '\0'; ++pos) {
177 if (*pos == '/' || *pos == '\\') {
180 ret = mkdir(temp, 0755);
185 if ((*(pos - 1) != '/') || (*(pos - 1) != '\\')) {
186 ret = mkdir(temp, 0755);
193 static int replace_int_data_in_filename(char *buf, int buf_size, const char *filename, char placeholder, int64_t number)
196 char *q, buf1[20], c;
197 int nd, len, addchar_count;
206 if (c == '%' && *(p+1) == '%') // %%
208 else if (c == '%' && (av_isdigit(*(p+1)) || *(p+1) == placeholder)) {
211 while (av_isdigit(*(p + addchar_count))) {
212 nd = nd * 10 + *(p + addchar_count) - '0';
216 if (*(p + addchar_count) == placeholder) {
217 len = snprintf(buf1, sizeof(buf1), "%0*"PRId64, (number < 0) ? nd : nd++, number);
218 if (len < 1) // returned error or empty buf1
220 if ((q - buf + len) > buf_size - 1)
222 memcpy(q, buf1, len);
224 p += (addchar_count + 1);
232 while (addchar_count--)
233 if ((q - buf) < buf_size - 1)
245 static int hls_delete_old_segments(AVFormatContext *s, HLSContext *hls) {
247 HLSSegment *segment, *previous_segment = NULL;
248 float playlist_duration = 0.0f;
249 int ret = 0, path_size, sub_path_size;
250 char *dirname = NULL, *p, *sub_path;
252 AVDictionary *options = NULL;
253 AVIOContext *out = NULL;
254 const char *proto = NULL;
256 segment = hls->segments;
258 playlist_duration += segment->duration;
259 segment = segment->next;
262 segment = hls->old_segments;
264 playlist_duration -= segment->duration;
265 previous_segment = segment;
266 segment = previous_segment->next;
267 if (playlist_duration <= -previous_segment->duration) {
268 previous_segment->next = NULL;
273 if (segment && !hls->use_localtime_mkdir) {
274 if (hls->segment_filename) {
275 dirname = av_strdup(hls->segment_filename);
277 dirname = av_strdup(hls->avf->filename);
280 ret = AVERROR(ENOMEM);
283 p = (char *)av_basename(dirname);
288 av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n",
290 path_size = (hls->use_localtime_mkdir ? 0 : strlen(dirname)) + strlen(segment->filename) + 1;
291 path = av_malloc(path_size);
293 ret = AVERROR(ENOMEM);
297 if (hls->use_localtime_mkdir)
298 av_strlcpy(path, segment->filename, path_size);
299 else { // segment->filename contains basename only
300 av_strlcpy(path, dirname, path_size);
301 av_strlcat(path, segment->filename, path_size);
304 proto = avio_find_protocol_name(s->filename);
305 if (hls->method || (proto && !av_strcasecmp(proto, "http"))) {
306 av_dict_set(&options, "method", "DELETE", 0);
307 if ((ret = hls->avf->io_open(hls->avf, &out, path, AVIO_FLAG_WRITE, &options)) < 0)
309 ff_format_io_close(hls->avf, &out);
310 } else if (unlink(path) < 0) {
311 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
312 path, strerror(errno));
315 if ((segment->sub_filename[0] != '\0')) {
316 sub_path_size = strlen(segment->sub_filename) + 1 + (dirname ? strlen(dirname) : 0);
317 sub_path = av_malloc(sub_path_size);
319 ret = AVERROR(ENOMEM);
323 av_strlcpy(sub_path, dirname, sub_path_size);
324 av_strlcat(sub_path, segment->sub_filename, sub_path_size);
326 if (hls->method || (proto && !av_strcasecmp(proto, "http"))) {
327 av_dict_set(&options, "method", "DELETE", 0);
328 if ((ret = hls->avf->io_open(hls->avf, &out, sub_path, AVIO_FLAG_WRITE, &options)) < 0) {
332 ff_format_io_close(hls->avf, &out);
333 } else if (unlink(sub_path) < 0) {
334 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
335 sub_path, strerror(errno));
340 previous_segment = segment;
341 segment = previous_segment->next;
342 av_free(previous_segment);
352 static int hls_encryption_start(AVFormatContext *s)
354 HLSContext *hls = s->priv_data;
357 uint8_t key[KEYSIZE];
359 if ((ret = s->io_open(s, &pb, hls->key_info_file, AVIO_FLAG_READ, NULL)) < 0) {
360 av_log(hls, AV_LOG_ERROR,
361 "error opening key info file %s\n", hls->key_info_file);
365 ff_get_line(pb, hls->key_uri, sizeof(hls->key_uri));
366 hls->key_uri[strcspn(hls->key_uri, "\r\n")] = '\0';
368 ff_get_line(pb, hls->key_file, sizeof(hls->key_file));
369 hls->key_file[strcspn(hls->key_file, "\r\n")] = '\0';
371 ff_get_line(pb, hls->iv_string, sizeof(hls->iv_string));
372 hls->iv_string[strcspn(hls->iv_string, "\r\n")] = '\0';
374 ff_format_io_close(s, &pb);
376 if (!*hls->key_uri) {
377 av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
378 return AVERROR(EINVAL);
381 if (!*hls->key_file) {
382 av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
383 return AVERROR(EINVAL);
386 if ((ret = s->io_open(s, &pb, hls->key_file, AVIO_FLAG_READ, NULL)) < 0) {
387 av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", hls->key_file);
391 ret = avio_read(pb, key, sizeof(key));
392 ff_format_io_close(s, &pb);
393 if (ret != sizeof(key)) {
394 av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", hls->key_file);
395 if (ret >= 0 || ret == AVERROR_EOF)
396 ret = AVERROR(EINVAL);
399 ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
404 static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
406 int len = ff_get_line(s, buf, maxlen);
407 while (len > 0 && av_isspace(buf[len - 1]))
412 static int hls_mux_init(AVFormatContext *s)
414 HLSContext *hls = s->priv_data;
416 AVFormatContext *vtt_oc = NULL;
419 ret = avformat_alloc_output_context2(&hls->avf, hls->oformat, NULL, NULL);
424 oc->filename[0] = '\0';
425 oc->oformat = hls->oformat;
426 oc->interrupt_callback = s->interrupt_callback;
427 oc->max_delay = s->max_delay;
428 oc->opaque = s->opaque;
429 oc->io_open = s->io_open;
430 oc->io_close = s->io_close;
431 av_dict_copy(&oc->metadata, s->metadata, 0);
433 if(hls->vtt_oformat) {
434 ret = avformat_alloc_output_context2(&hls->vtt_avf, hls->vtt_oformat, NULL, NULL);
437 vtt_oc = hls->vtt_avf;
438 vtt_oc->oformat = hls->vtt_oformat;
439 av_dict_copy(&vtt_oc->metadata, s->metadata, 0);
442 for (i = 0; i < s->nb_streams; i++) {
444 AVFormatContext *loc;
445 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
450 if (!(st = avformat_new_stream(loc, NULL)))
451 return AVERROR(ENOMEM);
452 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
453 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
454 st->time_base = s->streams[i]->time_base;
455 av_dict_copy(&st->metadata, s->streams[i]->metadata, 0);
463 static HLSSegment *find_segment_by_filename(HLSSegment *segment, const char *filename)
466 if (!av_strcasecmp(segment->filename,filename))
468 segment = segment->next;
470 return (HLSSegment *) NULL;
473 static int sls_flags_filename_process(struct AVFormatContext *s, HLSContext *hls, HLSSegment *en, double duration,
474 int64_t pos, int64_t size)
476 if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
477 strlen(hls->current_segment_final_filename_fmt)) {
478 av_strlcpy(hls->avf->filename, hls->current_segment_final_filename_fmt, sizeof(hls->avf->filename));
479 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
480 char * filename = av_strdup(hls->avf->filename); // %%s will be %s after strftime
483 return AVERROR(ENOMEM);
485 if (replace_int_data_in_filename(hls->avf->filename, sizeof(hls->avf->filename),
486 filename, 's', pos + size) < 1) {
487 av_log(hls, AV_LOG_ERROR,
488 "Invalid second level segment filename template '%s', "
489 "you can try to remove second_level_segment_size flag\n",
493 return AVERROR(EINVAL);
497 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
498 char * filename = av_strdup(hls->avf->filename); // %%t will be %t after strftime
501 return AVERROR(ENOMEM);
503 if (replace_int_data_in_filename(hls->avf->filename, sizeof(hls->avf->filename),
504 filename, 't', (int64_t)round(duration * HLS_MICROSECOND_UNIT)) < 1) {
505 av_log(hls, AV_LOG_ERROR,
506 "Invalid second level segment filename template '%s', "
507 "you can try to remove second_level_segment_time flag\n",
511 return AVERROR(EINVAL);
519 static int sls_flag_check_duration_size_index(HLSContext *hls)
523 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
524 av_log(hls, AV_LOG_ERROR,
525 "second_level_segment_duration hls_flag requires use_localtime to be true\n");
526 ret = AVERROR(EINVAL);
528 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
529 av_log(hls, AV_LOG_ERROR,
530 "second_level_segment_size hls_flag requires use_localtime to be true\n");
531 ret = AVERROR(EINVAL);
533 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_INDEX) {
534 av_log(hls, AV_LOG_ERROR,
535 "second_level_segment_index hls_flag requires use_localtime to be true\n");
536 ret = AVERROR(EINVAL);
542 static int sls_flag_check_duration_size(HLSContext *hls)
544 const char *proto = avio_find_protocol_name(hls->basename);
545 int segment_renaming_ok = proto && !strcmp(proto, "file");
548 if ((hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) && !segment_renaming_ok) {
549 av_log(hls, AV_LOG_ERROR,
550 "second_level_segment_duration hls_flag works only with file protocol segment names\n");
551 ret = AVERROR(EINVAL);
553 if ((hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) && !segment_renaming_ok) {
554 av_log(hls, AV_LOG_ERROR,
555 "second_level_segment_size hls_flag works only with file protocol segment names\n");
556 ret = AVERROR(EINVAL);
562 static void sls_flag_file_rename(HLSContext *hls, char *old_filename) {
563 if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
564 strlen(hls->current_segment_final_filename_fmt)) {
565 ff_rename(old_filename, hls->avf->filename, hls);
569 static int sls_flag_use_localtime_filename(AVFormatContext *oc, HLSContext *c)
571 if (c->flags & HLS_SECOND_LEVEL_SEGMENT_INDEX) {
572 char * filename = av_strdup(oc->filename); // %%d will be %d after strftime
574 return AVERROR(ENOMEM);
575 if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
577 filename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
579 filename, 'd', c->sequence) < 1) {
581 av_log(c, AV_LOG_ERROR, "Invalid second level segment filename template '%s', "
582 "you can try to remove second_level_segment_index flag\n",
585 return AVERROR(EINVAL);
589 if (c->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) {
590 av_strlcpy(c->current_segment_final_filename_fmt, oc->filename,
591 sizeof(c->current_segment_final_filename_fmt));
592 if (c->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
593 char * filename = av_strdup(oc->filename); // %%s will be %s after strftime
595 return AVERROR(ENOMEM);
596 if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename), filename, 's', 0) < 1) {
597 av_log(c, AV_LOG_ERROR, "Invalid second level segment filename template '%s', "
598 "you can try to remove second_level_segment_size flag\n",
601 return AVERROR(EINVAL);
605 if (c->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
606 char * filename = av_strdup(oc->filename); // %%t will be %t after strftime
608 return AVERROR(ENOMEM);
609 if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename), filename, 't', 0) < 1) {
610 av_log(c, AV_LOG_ERROR, "Invalid second level segment filename template '%s', "
611 "you can try to remove second_level_segment_time flag\n",
614 return AVERROR(EINVAL);
622 /* Create a new segment and append it to the segment list */
623 static int hls_append_segment(struct AVFormatContext *s, HLSContext *hls, double duration,
624 int64_t pos, int64_t size)
626 HLSSegment *en = av_malloc(sizeof(*en));
627 const char *filename;
631 return AVERROR(ENOMEM);
633 ret = sls_flags_filename_process(s, hls, en, duration, pos, size);
638 filename = av_basename(hls->avf->filename);
640 if (hls->use_localtime_mkdir) {
641 filename = hls->avf->filename;
643 if (find_segment_by_filename(hls->segments, filename)
644 || find_segment_by_filename(hls->old_segments, filename)) {
645 av_log(hls, AV_LOG_WARNING, "Duplicated segment filename detected: %s\n", filename);
647 av_strlcpy(en->filename, filename, sizeof(en->filename));
649 if(hls->has_subtitle)
650 av_strlcpy(en->sub_filename, av_basename(hls->vtt_avf->filename), sizeof(en->sub_filename));
652 en->sub_filename[0] = '\0';
654 en->duration = duration;
660 if (hls->discontinuity) {
662 hls->discontinuity = 0;
665 if (hls->key_info_file) {
666 av_strlcpy(en->key_uri, hls->key_uri, sizeof(en->key_uri));
667 av_strlcpy(en->iv_string, hls->iv_string, sizeof(en->iv_string));
673 hls->last_segment->next = en;
675 hls->last_segment = en;
677 // EVENT or VOD playlists imply sliding window cannot be used
678 if (hls->pl_type != PLAYLIST_TYPE_NONE)
679 hls->max_nb_segments = 0;
681 if (hls->max_nb_segments && hls->nb_entries >= hls->max_nb_segments) {
683 hls->initial_prog_date_time += en->duration;
684 hls->segments = en->next;
685 if (en && hls->flags & HLS_DELETE_SEGMENTS &&
687 !(hls->flags & HLS_SINGLE_FILE || hls->wrap)) {
689 !(hls->flags & HLS_SINGLE_FILE)) {
691 en->next = hls->old_segments;
692 hls->old_segments = en;
693 if ((ret = hls_delete_old_segments(s, hls)) < 0)
700 if (hls->max_seg_size > 0) {
708 static int parse_playlist(AVFormatContext *s, const char *url)
710 HLSContext *hls = s->priv_data;
712 int ret = 0, is_segment = 0;
713 int64_t new_start_pos;
717 if ((ret = ffio_open_whitelist(&in, url, AVIO_FLAG_READ,
718 &s->interrupt_callback, NULL,
719 s->protocol_whitelist, s->protocol_blacklist)) < 0)
722 read_chomp_line(in, line, sizeof(line));
723 if (strcmp(line, "#EXTM3U")) {
724 ret = AVERROR_INVALIDDATA;
728 hls->discontinuity = 0;
729 while (!avio_feof(in)) {
730 read_chomp_line(in, line, sizeof(line));
731 if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
732 int64_t tmp_sequence = strtoll(ptr, NULL, 10);
733 if (tmp_sequence < hls->sequence)
734 av_log(hls, AV_LOG_VERBOSE,
735 "Found playlist sequence number was smaller """
736 "than specified start sequence number: %"PRId64" < %"PRId64", "
737 "omitting\n", tmp_sequence, hls->start_sequence);
739 av_log(hls, AV_LOG_DEBUG, "Found playlist sequence number: %"PRId64"\n", tmp_sequence);
740 hls->sequence = tmp_sequence;
742 } else if (av_strstart(line, "#EXT-X-DISCONTINUITY", &ptr)) {
744 hls->discontinuity = 1;
745 } else if (av_strstart(line, "#EXTINF:", &ptr)) {
747 hls->duration = atof(ptr);
748 } else if (av_strstart(line, "#", NULL)) {
750 } else if (line[0]) {
753 new_start_pos = avio_tell(hls->avf->pb);
754 hls->size = new_start_pos - hls->start_pos;
755 av_strlcpy(hls->avf->filename, line, sizeof(line));
756 ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
759 hls->start_pos = new_start_pos;
769 static void hls_free_segments(HLSSegment *p)
780 static void set_http_options(AVFormatContext *s, AVDictionary **options, HLSContext *c)
782 const char *proto = avio_find_protocol_name(s->filename);
783 int http_base_proto = proto ? (!av_strcasecmp(proto, "http") || !av_strcasecmp(proto, "https")) : 0;
786 av_dict_set(options, "method", c->method, 0);
787 } else if (http_base_proto) {
788 av_log(c, AV_LOG_WARNING, "No HTTP method set, hls muxer defaulting to method PUT.\n");
789 av_dict_set(options, "method", "PUT", 0);
793 static void write_m3u8_head_block(HLSContext *hls, AVIOContext *out, int version,
794 int target_duration, int64_t sequence)
796 avio_printf(out, "#EXTM3U\n");
797 avio_printf(out, "#EXT-X-VERSION:%d\n", version);
798 if (hls->allowcache == 0 || hls->allowcache == 1) {
799 avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
801 avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
802 avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
803 av_log(hls, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
806 static void hls_rename_temp_file(AVFormatContext *s, AVFormatContext *oc)
808 size_t len = strlen(oc->filename);
809 char final_filename[sizeof(oc->filename)];
811 av_strlcpy(final_filename, oc->filename, len);
812 final_filename[len-4] = '\0';
813 ff_rename(oc->filename, final_filename, s);
814 oc->filename[len-4] = '\0';
817 static int hls_window(AVFormatContext *s, int last)
819 HLSContext *hls = s->priv_data;
821 int target_duration = 0;
823 AVIOContext *out = NULL;
824 AVIOContext *sub_out = NULL;
825 char temp_filename[1024];
826 int64_t sequence = FFMAX(hls->start_sequence, hls->sequence - hls->nb_entries);
828 const char *proto = avio_find_protocol_name(s->filename);
829 int use_rename = proto && !strcmp(proto, "file");
830 static unsigned warned_non_file;
831 char *key_uri = NULL;
832 char *iv_string = NULL;
833 AVDictionary *options = NULL;
834 double prog_date_time = hls->initial_prog_date_time;
835 int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
837 if (byterange_mode) {
842 if (!use_rename && !warned_non_file++)
843 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
845 set_http_options(s, &options, hls);
846 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
847 if ((ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, &options)) < 0)
850 for (en = hls->segments; en; en = en->next) {
851 if (target_duration <= en->duration)
852 target_duration = get_int_from_double(en->duration);
855 hls->discontinuity_set = 0;
856 write_m3u8_head_block(hls, out, version, target_duration, sequence);
857 if (hls->pl_type == PLAYLIST_TYPE_EVENT) {
858 avio_printf(out, "#EXT-X-PLAYLIST-TYPE:EVENT\n");
859 } else if (hls->pl_type == PLAYLIST_TYPE_VOD) {
860 avio_printf(out, "#EXT-X-PLAYLIST-TYPE:VOD\n");
863 if((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && hls->discontinuity_set==0 ){
864 avio_printf(out, "#EXT-X-DISCONTINUITY\n");
865 hls->discontinuity_set = 1;
867 for (en = hls->segments; en; en = en->next) {
868 if (hls->key_info_file && (!key_uri || strcmp(en->key_uri, key_uri) ||
869 av_strcasecmp(en->iv_string, iv_string))) {
870 avio_printf(out, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"", en->key_uri);
872 avio_printf(out, ",IV=0x%s", en->iv_string);
873 avio_printf(out, "\n");
874 key_uri = en->key_uri;
875 iv_string = en->iv_string;
879 avio_printf(out, "#EXT-X-DISCONTINUITY\n");
882 if (hls->flags & HLS_ROUND_DURATIONS)
883 avio_printf(out, "#EXTINF:%ld,\n", lrint(en->duration));
885 avio_printf(out, "#EXTINF:%f,\n", en->duration);
887 avio_printf(out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
889 if (hls->flags & HLS_PROGRAM_DATE_TIME) {
890 time_t tt, wrongsecs;
892 struct tm *tm, tmpbuf;
893 char buf0[128], buf1[128];
894 tt = (int64_t)prog_date_time;
895 milli = av_clip(lrint(1000*(prog_date_time - tt)), 0, 999);
896 tm = localtime_r(&tt, &tmpbuf);
897 strftime(buf0, sizeof(buf0), "%Y-%m-%dT%H:%M:%S", tm);
898 if (!strftime(buf1, sizeof(buf1), "%z", tm) || buf1[1]<'0' ||buf1[1]>'2') {
899 int tz_min, dst = tm->tm_isdst;
900 tm = gmtime_r(&tt, &tmpbuf);
902 wrongsecs = mktime(tm);
903 tz_min = (abs(wrongsecs - tt) + 30) / 60;
904 snprintf(buf1, sizeof(buf1),
906 wrongsecs <= tt ? '+' : '-',
910 avio_printf(out, "#EXT-X-PROGRAM-DATE-TIME:%s.%03d%s\n", buf0, milli, buf1);
911 prog_date_time += en->duration;
914 avio_printf(out, "%s", hls->baseurl);
915 avio_printf(out, "%s\n", en->filename);
918 if (last && (hls->flags & HLS_OMIT_ENDLIST)==0)
919 avio_printf(out, "#EXT-X-ENDLIST\n");
921 if( hls->vtt_m3u8_name ) {
922 if ((ret = s->io_open(s, &sub_out, hls->vtt_m3u8_name, AVIO_FLAG_WRITE, &options)) < 0)
924 write_m3u8_head_block(hls, sub_out, version, target_duration, sequence);
926 for (en = hls->segments; en; en = en->next) {
927 avio_printf(sub_out, "#EXTINF:%f,\n", en->duration);
929 avio_printf(sub_out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
932 avio_printf(sub_out, "%s", hls->baseurl);
933 avio_printf(sub_out, "%s\n", en->sub_filename);
937 avio_printf(sub_out, "#EXT-X-ENDLIST\n");
942 av_dict_free(&options);
943 ff_format_io_close(s, &out);
944 ff_format_io_close(s, &sub_out);
945 if (ret >= 0 && use_rename)
946 ff_rename(temp_filename, s->filename, s);
950 static int hls_start(AVFormatContext *s)
952 HLSContext *c = s->priv_data;
953 AVFormatContext *oc = c->avf;
954 AVFormatContext *vtt_oc = c->vtt_avf;
955 AVDictionary *options = NULL;
956 char *filename, iv_string[KEYSIZE*2 + 1];
959 if (c->flags & HLS_SINGLE_FILE) {
960 av_strlcpy(oc->filename, c->basename,
961 sizeof(oc->filename));
963 av_strlcpy(vtt_oc->filename, c->vtt_basename,
964 sizeof(vtt_oc->filename));
965 } else if (c->max_seg_size > 0) {
966 if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
968 c->basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
970 c->basename, 'd', c->sequence) < 1) {
972 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s', you can try to use -use_localtime 1 with it\n", c->basename);
973 return AVERROR(EINVAL);
976 if (c->use_localtime) {
978 struct tm *tm, tmpbuf;
980 tm = localtime_r(&now0, &tmpbuf);
981 if (!strftime(oc->filename, sizeof(oc->filename), c->basename, tm)) {
982 av_log(oc, AV_LOG_ERROR, "Could not get segment filename with use_localtime\n");
983 return AVERROR(EINVAL);
986 err = sls_flag_use_localtime_filename(oc, c);
988 return AVERROR(ENOMEM);
991 if (c->use_localtime_mkdir) {
993 char *fn_copy = av_strdup(oc->filename);
995 return AVERROR(ENOMEM);
997 dir = av_dirname(fn_copy);
998 if (mkdir_p(dir) == -1 && errno != EEXIST) {
999 av_log(oc, AV_LOG_ERROR, "Could not create directory %s with use_localtime_mkdir\n", dir);
1001 return AVERROR(errno);
1005 } else if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
1007 c->basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
1009 c->basename, 'd', c->sequence) < 1) {
1011 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try to use -use_localtime 1 with it\n", c->basename);
1012 return AVERROR(EINVAL);
1014 if( c->vtt_basename) {
1015 if (replace_int_data_in_filename(vtt_oc->filename, sizeof(vtt_oc->filename),
1017 c->vtt_basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
1019 c->vtt_basename, 'd', c->sequence) < 1) {
1021 av_log(vtt_oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", c->vtt_basename);
1022 return AVERROR(EINVAL);
1028 set_http_options(s, &options, c);
1030 if (c->flags & HLS_TEMP_FILE) {
1031 av_strlcat(oc->filename, ".tmp", sizeof(oc->filename));
1034 if (c->key_info_file) {
1035 if ((err = hls_encryption_start(s)) < 0)
1037 if ((err = av_dict_set(&options, "encryption_key", c->key_string, 0))
1040 err = av_strlcpy(iv_string, c->iv_string, sizeof(iv_string));
1042 snprintf(iv_string, sizeof(iv_string), "%032"PRIx64, c->sequence);
1043 if ((err = av_dict_set(&options, "encryption_iv", iv_string, 0)) < 0)
1046 filename = av_asprintf("crypto:%s", oc->filename);
1048 err = AVERROR(ENOMEM);
1051 err = s->io_open(s, &oc->pb, filename, AVIO_FLAG_WRITE, &options);
1053 av_dict_free(&options);
1057 if ((err = s->io_open(s, &oc->pb, oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
1059 if (c->vtt_basename) {
1060 set_http_options(s, &options, c);
1061 if ((err = s->io_open(s, &vtt_oc->pb, vtt_oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
1064 av_dict_free(&options);
1066 /* We only require one PAT/PMT per segment. */
1067 if (oc->oformat->priv_class && oc->priv_data) {
1070 snprintf(period, sizeof(period), "%d", (INT_MAX / 2) - 1);
1072 av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0);
1073 av_opt_set(oc->priv_data, "sdt_period", period, 0);
1074 av_opt_set(oc->priv_data, "pat_period", period, 0);
1077 if (c->vtt_basename) {
1078 err = avformat_write_header(vtt_oc,NULL);
1085 av_dict_free(&options);
1090 static const char * get_default_pattern_localtime_fmt(void)
1093 time_t t = time(NULL);
1094 struct tm *p, tmbuf;
1095 p = localtime_r(&t, &tmbuf);
1096 // no %s support when strftime returned error or left format string unchanged
1097 // also no %s support on MSVC, which invokes the invalid parameter handler on unsupported format strings, instead of returning an error
1098 return (HAVE_LIBC_MSVCRT || !strftime(b, sizeof(b), "%s", p) || !strcmp(b, "%s")) ? "-%Y%m%d%H%M%S.ts" : "-%s.ts";
1101 static int hls_write_header(AVFormatContext *s)
1103 HLSContext *hls = s->priv_data;
1106 const char *pattern = "%d.ts";
1107 const char *pattern_localtime_fmt = get_default_pattern_localtime_fmt();
1108 const char *vtt_pattern = "%d.vtt";
1109 AVDictionary *options = NULL;
1111 int vtt_basename_size;
1113 if ((hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH) ||
1114 (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_FORMATTED_DATETIME)) {
1115 time_t t = time(NULL); // we will need it in either case
1116 if (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH) {
1117 hls->start_sequence = (int64_t)t;
1118 } else if (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_FORMATTED_DATETIME) {
1120 struct tm *p, tmbuf;
1121 if (!(p = localtime_r(&t, &tmbuf)))
1122 return AVERROR(ENOMEM);
1123 if (!strftime(b, sizeof(b), "%Y%m%d%H%M%S", p))
1124 return AVERROR(ENOMEM);
1125 hls->start_sequence = strtoll(b, NULL, 10);
1127 av_log(hls, AV_LOG_DEBUG, "start_number evaluated to %"PRId64"\n", hls->start_sequence);
1130 hls->sequence = hls->start_sequence;
1131 hls->recording_time = (hls->init_time ? hls->init_time : hls->time) * AV_TIME_BASE;
1132 hls->start_pts = AV_NOPTS_VALUE;
1133 hls->current_segment_final_filename_fmt[0] = '\0';
1135 if (hls->flags & HLS_PROGRAM_DATE_TIME) {
1138 hls->initial_prog_date_time = now0;
1141 if (hls->format_options_str) {
1142 ret = av_dict_parse_string(&hls->format_options, hls->format_options_str, "=", ":", 0);
1144 av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", hls->format_options_str);
1149 for (i = 0; i < s->nb_streams; i++) {
1151 s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
1152 hls->has_subtitle +=
1153 s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE;
1156 if (hls->has_video > 1)
1157 av_log(s, AV_LOG_WARNING,
1158 "More than a single video stream present, "
1159 "expect issues decoding it.\n");
1161 hls->oformat = av_guess_format("mpegts", NULL, NULL);
1163 if (!hls->oformat) {
1164 ret = AVERROR_MUXER_NOT_FOUND;
1168 if(hls->has_subtitle) {
1169 hls->vtt_oformat = av_guess_format("webvtt", NULL, NULL);
1170 if (!hls->oformat) {
1171 ret = AVERROR_MUXER_NOT_FOUND;
1176 if (hls->segment_filename) {
1177 hls->basename = av_strdup(hls->segment_filename);
1178 if (!hls->basename) {
1179 ret = AVERROR(ENOMEM);
1183 if (hls->flags & HLS_SINGLE_FILE)
1186 if (hls->use_localtime) {
1187 basename_size = strlen(s->filename) + strlen(pattern_localtime_fmt) + 1;
1189 basename_size = strlen(s->filename) + strlen(pattern) + 1;
1191 hls->basename = av_malloc(basename_size);
1192 if (!hls->basename) {
1193 ret = AVERROR(ENOMEM);
1197 av_strlcpy(hls->basename, s->filename, basename_size);
1199 p = strrchr(hls->basename, '.');
1202 if (hls->use_localtime) {
1203 av_strlcat(hls->basename, pattern_localtime_fmt, basename_size);
1205 av_strlcat(hls->basename, pattern, basename_size);
1208 if (!hls->use_localtime) {
1209 ret = sls_flag_check_duration_size_index(hls);
1214 ret = sls_flag_check_duration_size(hls);
1219 if(hls->has_subtitle) {
1221 if (hls->flags & HLS_SINGLE_FILE)
1222 vtt_pattern = ".vtt";
1223 vtt_basename_size = strlen(s->filename) + strlen(vtt_pattern) + 1;
1224 hls->vtt_basename = av_malloc(vtt_basename_size);
1225 if (!hls->vtt_basename) {
1226 ret = AVERROR(ENOMEM);
1229 hls->vtt_m3u8_name = av_malloc(vtt_basename_size);
1230 if (!hls->vtt_m3u8_name ) {
1231 ret = AVERROR(ENOMEM);
1234 av_strlcpy(hls->vtt_basename, s->filename, vtt_basename_size);
1235 p = strrchr(hls->vtt_basename, '.');
1239 if( hls->subtitle_filename ) {
1240 strcpy(hls->vtt_m3u8_name, hls->subtitle_filename);
1242 strcpy(hls->vtt_m3u8_name, hls->vtt_basename);
1243 av_strlcat(hls->vtt_m3u8_name, "_vtt.m3u8", vtt_basename_size);
1245 av_strlcat(hls->vtt_basename, vtt_pattern, vtt_basename_size);
1248 if ((ret = hls_mux_init(s)) < 0)
1251 if (hls->flags & HLS_APPEND_LIST) {
1252 parse_playlist(s, s->filename);
1253 hls->discontinuity = 1;
1254 if (hls->init_time > 0) {
1255 av_log(s, AV_LOG_WARNING, "append_list mode does not support hls_init_time,"
1256 " hls_init_time value will have no effect\n");
1258 hls->recording_time = hls->time * AV_TIME_BASE;
1262 if ((ret = hls_start(s)) < 0)
1265 av_dict_copy(&options, hls->format_options, 0);
1266 ret = avformat_write_header(hls->avf, &options);
1267 if (av_dict_count(options)) {
1268 av_log(s, AV_LOG_ERROR, "Some of provided format options in '%s' are not recognized\n", hls->format_options_str);
1269 ret = AVERROR(EINVAL);
1272 //av_assert0(s->nb_streams == hls->avf->nb_streams);
1273 for (i = 0; i < s->nb_streams; i++) {
1275 AVStream *outer_st = s->streams[i];
1277 if (hls->max_seg_size > 0) {
1278 if ((outer_st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1279 (outer_st->codecpar->bit_rate > hls->max_seg_size)) {
1280 av_log(s, AV_LOG_WARNING, "Your video bitrate is bigger than hls_segment_size, "
1281 "(%"PRId64 " > %"PRId64 "), the result maybe not be what you want.",
1282 outer_st->codecpar->bit_rate, hls->max_seg_size);
1286 if (outer_st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
1287 inner_st = hls->avf->streams[i];
1288 else if (hls->vtt_avf)
1289 inner_st = hls->vtt_avf->streams[0];
1291 /* We have a subtitle stream, when the user does not want one */
1295 avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
1299 av_dict_free(&options);
1301 av_freep(&hls->basename);
1302 av_freep(&hls->vtt_basename);
1304 avformat_free_context(hls->avf);
1306 avformat_free_context(hls->vtt_avf);
1312 static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
1314 HLSContext *hls = s->priv_data;
1315 AVFormatContext *oc = NULL;
1316 AVStream *st = s->streams[pkt->stream_index];
1317 int64_t end_pts = hls->recording_time * hls->number;
1319 int ret, can_split = 1;
1320 int stream_index = 0;
1322 if (hls->sequence - hls->nb_entries > hls->start_sequence && hls->init_time > 0) {
1323 /* reset end_pts, hls->recording_time at end of the init hls list */
1324 int init_list_dur = hls->init_time * hls->nb_entries * AV_TIME_BASE;
1325 int after_init_list_dur = (hls->sequence - hls->nb_entries ) * hls->time * AV_TIME_BASE;
1326 hls->recording_time = hls->time * AV_TIME_BASE;
1327 end_pts = init_list_dur + after_init_list_dur ;
1330 if( st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
1335 stream_index = pkt->stream_index;
1337 if (hls->start_pts == AV_NOPTS_VALUE) {
1338 hls->start_pts = pkt->pts;
1339 hls->end_pts = pkt->pts;
1342 if (hls->has_video) {
1343 can_split = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1344 ((pkt->flags & AV_PKT_FLAG_KEY) || (hls->flags & HLS_SPLIT_BY_TIME));
1345 is_ref_pkt = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
1347 if (pkt->pts == AV_NOPTS_VALUE)
1348 is_ref_pkt = can_split = 0;
1351 if (hls->new_start) {
1353 hls->duration = (double)(pkt->pts - hls->end_pts)
1354 * st->time_base.num / st->time_base.den;
1355 hls->dpp = (double)(pkt->duration) * st->time_base.num / st->time_base.den;
1357 if (pkt->duration) {
1358 hls->duration += (double)(pkt->duration) * st->time_base.num / st->time_base.den;
1360 av_log(s, AV_LOG_WARNING, "pkt->duration = 0, maybe the hls segment duration will not precise\n");
1361 hls->duration = (double)(pkt->pts - hls->end_pts) * st->time_base.num / st->time_base.den;
1366 if (can_split && av_compare_ts(pkt->pts - hls->start_pts, st->time_base,
1367 end_pts, AV_TIME_BASE_Q) >= 0) {
1368 int64_t new_start_pos;
1369 char *old_filename = av_strdup(hls->avf->filename);
1370 int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
1372 if (!old_filename) {
1373 return AVERROR(ENOMEM);
1376 av_write_frame(oc, NULL); /* Flush any buffered data */
1378 new_start_pos = avio_tell(hls->avf->pb);
1379 hls->size = new_start_pos - hls->start_pos;
1381 if (!byterange_mode) {
1382 ff_format_io_close(s, &oc->pb);
1384 ff_format_io_close(s, &hls->vtt_avf->pb);
1387 if ((hls->flags & HLS_TEMP_FILE) && oc->filename[0]) {
1388 if (!(hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size <= 0))
1389 if (hls->avf->oformat->priv_class && hls->avf->priv_data)
1390 av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
1391 hls_rename_temp_file(s, oc);
1394 ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
1395 hls->start_pos = new_start_pos;
1397 av_free(old_filename);
1401 hls->end_pts = pkt->pts;
1404 if (hls->flags & HLS_SINGLE_FILE) {
1406 } else if (hls->max_seg_size > 0) {
1407 if (hls->start_pos >= hls->max_seg_size) {
1409 sls_flag_file_rename(hls, old_filename);
1412 /* When split segment by byte, the duration is short than hls_time,
1413 * so it is not enough one segment duration as hls_time, */
1418 sls_flag_file_rename(hls, old_filename);
1423 av_free(old_filename);
1427 if ((ret = hls_window(s, 0)) < 0) {
1428 av_free(old_filename);
1433 ret = ff_write_chained(oc, stream_index, pkt, s, 0);
1438 static int hls_write_trailer(struct AVFormatContext *s)
1440 HLSContext *hls = s->priv_data;
1441 AVFormatContext *oc = hls->avf;
1442 AVFormatContext *vtt_oc = hls->vtt_avf;
1443 char *old_filename = av_strdup(hls->avf->filename);
1445 if (!old_filename) {
1446 return AVERROR(ENOMEM);
1450 av_write_trailer(oc);
1452 hls->size = avio_tell(hls->avf->pb) - hls->start_pos;
1453 ff_format_io_close(s, &oc->pb);
1455 if ((hls->flags & HLS_TEMP_FILE) && oc->filename[0]) {
1456 hls_rename_temp_file(s, oc);
1459 /* after av_write_trailer, then duration + 1 duration per packet */
1460 hls_append_segment(s, hls, hls->duration + hls->dpp, hls->start_pos, hls->size);
1463 sls_flag_file_rename(hls, old_filename);
1467 av_write_trailer(vtt_oc);
1468 hls->size = avio_tell(hls->vtt_avf->pb) - hls->start_pos;
1469 ff_format_io_close(s, &vtt_oc->pb);
1471 av_freep(&hls->basename);
1472 avformat_free_context(oc);
1478 av_freep(&hls->vtt_basename);
1479 av_freep(&hls->vtt_m3u8_name);
1480 avformat_free_context(vtt_oc);
1483 hls_free_segments(hls->segments);
1484 hls_free_segments(hls->old_segments);
1485 av_free(old_filename);
1489 #define OFFSET(x) offsetof(HLSContext, x)
1490 #define E AV_OPT_FLAG_ENCODING_PARAM
1491 static const AVOption options[] = {
1492 {"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
1493 {"hls_time", "set segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E},
1494 {"hls_init_time", "set segment length in seconds at init list", OFFSET(init_time), AV_OPT_TYPE_FLOAT, {.dbl = 0}, 0, FLT_MAX, E},
1495 {"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
1496 {"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},
1497 {"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},
1499 {"hls_wrap", "set number after which the index wraps (will be deprecated)", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
1501 {"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},
1502 {"hls_base_url", "url to prepend to each playlist entry", OFFSET(baseurl), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1503 {"hls_segment_filename", "filename template for segment files", OFFSET(segment_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1504 {"hls_segment_size", "maximum size per segment file, (in bytes)", OFFSET(max_seg_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
1505 {"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},
1506 {"hls_subtitle_path", "set path of hls subtitles", OFFSET(subtitle_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1507 {"hls_flags", "set flags affecting HLS playlist and media file generation", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0 }, 0, UINT_MAX, E, "flags"},
1508 {"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"},
1509 {"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"},
1510 {"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"},
1511 {"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, "flags"},
1512 {"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, "flags"},
1513 {"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, "flags"},
1514 {"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"},
1515 {"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"},
1516 {"program_date_time", "add EXT-X-PROGRAM-DATE-TIME", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_PROGRAM_DATE_TIME }, 0, UINT_MAX, E, "flags"},
1517 {"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"},
1518 {"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"},
1519 {"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"},
1520 {"use_localtime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1521 {"use_localtime_mkdir", "create last directory component in strftime-generated filename", OFFSET(use_localtime_mkdir), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1522 {"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" },
1523 {"event", "EVENT playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_EVENT }, INT_MIN, INT_MAX, E, "pl_type" },
1524 {"vod", "VOD playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_VOD }, INT_MIN, INT_MAX, E, "pl_type" },
1525 {"method", "set the HTTP method(default: PUT)", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1526 {"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" },
1527 {"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" },
1528 {"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" },
1529 {"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" },
1533 static const AVClass hls_class = {
1534 .class_name = "hls muxer",
1535 .item_name = av_default_item_name,
1537 .version = LIBAVUTIL_VERSION_INT,
1541 AVOutputFormat ff_hls_muxer = {
1543 .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
1544 .extensions = "m3u8",
1545 .priv_data_size = sizeof(HLSContext),
1546 .audio_codec = AV_CODEC_ID_AAC,
1547 .video_codec = AV_CODEC_ID_H264,
1548 .subtitle_codec = AV_CODEC_ID_WEBVTT,
1549 .flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH,
1550 .write_header = hls_write_header,
1551 .write_packet = hls_write_packet,
1552 .write_trailer = hls_write_trailer,
1553 .priv_class = &hls_class,