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
32 #include <openssl/rand.h>
35 #include "libavutil/avassert.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/parseutils.h"
38 #include "libavutil/avstring.h"
39 #include "libavutil/intreadwrite.h"
40 #include "libavutil/random_seed.h"
41 #include "libavutil/opt.h"
42 #include "libavutil/log.h"
43 #include "libavutil/time_internal.h"
46 #include "avio_internal.h"
48 #include "os_support.h"
51 HLS_START_SEQUENCE_AS_START_NUMBER = 0,
52 HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH = 1,
53 HLS_START_SEQUENCE_AS_FORMATTED_DATETIME = 2, // YYYYMMDDhhmmss
54 } StartSequenceSourceType;
57 #define LINE_BUFFER_SIZE 1024
58 #define HLS_MICROSECOND_UNIT 1000000
60 typedef struct HLSSegment {
62 char sub_filename[1024];
63 double duration; /* in seconds */
68 char key_uri[LINE_BUFFER_SIZE + 1];
69 char iv_string[KEYSIZE*2 + 1];
71 struct HLSSegment *next;
74 typedef enum HLSFlags {
75 // Generate a single media file and use byte ranges in the playlist.
76 HLS_SINGLE_FILE = (1 << 0),
77 HLS_DELETE_SEGMENTS = (1 << 1),
78 HLS_ROUND_DURATIONS = (1 << 2),
79 HLS_DISCONT_START = (1 << 3),
80 HLS_OMIT_ENDLIST = (1 << 4),
81 HLS_SPLIT_BY_TIME = (1 << 5),
82 HLS_APPEND_LIST = (1 << 6),
83 HLS_PROGRAM_DATE_TIME = (1 << 7),
84 HLS_SECOND_LEVEL_SEGMENT_INDEX = (1 << 8), // include segment index in segment filenames when use_localtime e.g.: %%03d
85 HLS_SECOND_LEVEL_SEGMENT_DURATION = (1 << 9), // include segment duration (microsec) in segment filenames when use_localtime e.g.: %%09t
86 HLS_SECOND_LEVEL_SEGMENT_SIZE = (1 << 10), // include segment size (bytes) in segment filenames when use_localtime e.g.: %%014s
87 HLS_TEMP_FILE = (1 << 11),
97 typedef struct HLSContext {
98 const AVClass *class; // Class for private options.
101 int64_t start_sequence;
102 uint32_t start_sequence_source_type; // enum StartSequenceSourceType
103 AVOutputFormat *oformat;
104 AVOutputFormat *vtt_oformat;
106 AVFormatContext *avf;
107 AVFormatContext *vtt_avf;
109 float time; // Set by a private option.
110 float init_time; // Set by a private option.
111 int max_nb_segments; // Set by a private option.
113 int wrap; // Set by a private option.
115 uint32_t flags; // enum HLSFlags
116 uint32_t pl_type; // enum PlaylistType
117 char *segment_filename;
119 int use_localtime; ///< flag to expand filename with localtime
120 int use_localtime_mkdir;///< flag to mkdir dirname in timebased filename
122 int64_t recording_time;
126 double dpp; // duration per packet
129 double duration; // last segment duration computed so far, in seconds
130 int64_t start_pos; // last segment starting position
131 int64_t size; // last segment size
132 int64_t max_seg_size; // every segment file max size
134 int discontinuity_set;
137 HLSSegment *segments;
138 HLSSegment *last_segment;
139 HLSSegment *old_segments;
145 char *format_options_str;
146 char *vtt_format_options_str;
147 char *subtitle_filename;
148 AVDictionary *format_options;
157 char key_file[LINE_BUFFER_SIZE + 1];
158 char key_uri[LINE_BUFFER_SIZE + 1];
159 char key_string[KEYSIZE*2 + 1];
160 char iv_string[KEYSIZE*2 + 1];
161 AVDictionary *vtt_format_options;
165 double initial_prog_date_time;
166 char current_segment_final_filename_fmt[1024]; // when renaming segments
169 static int get_int_from_double(double val)
171 return (int)((val - (int)val) >= 0.001) ? (int)(val + 1) : (int)val;
174 static int mkdir_p(const char *path) {
176 char *temp = av_strdup(path);
180 if (!path || !temp) {
184 if (!strncmp(temp, "/", 1) || !strncmp(temp, "\\", 1)) {
186 } else if (!strncmp(temp, "./", 2) || !strncmp(temp, ".\\", 2)) {
190 for ( ; *pos != '\0'; ++pos) {
191 if (*pos == '/' || *pos == '\\') {
194 ret = mkdir(temp, 0755);
199 if ((*(pos - 1) != '/') || (*(pos - 1) != '\\')) {
200 ret = mkdir(temp, 0755);
207 static int replace_int_data_in_filename(char *buf, int buf_size, const char *filename, char placeholder, int64_t number)
210 char *q, buf1[20], c;
211 int nd, len, addchar_count;
220 if (c == '%' && *(p+1) == '%') // %%
222 else if (c == '%' && (av_isdigit(*(p+1)) || *(p+1) == placeholder)) {
225 while (av_isdigit(*(p + addchar_count))) {
226 nd = nd * 10 + *(p + addchar_count) - '0';
230 if (*(p + addchar_count) == placeholder) {
231 len = snprintf(buf1, sizeof(buf1), "%0*"PRId64, (number < 0) ? nd : nd++, number);
232 if (len < 1) // returned error or empty buf1
234 if ((q - buf + len) > buf_size - 1)
236 memcpy(q, buf1, len);
238 p += (addchar_count + 1);
246 while (addchar_count--)
247 if ((q - buf) < buf_size - 1)
259 static int hls_delete_old_segments(AVFormatContext *s, HLSContext *hls) {
261 HLSSegment *segment, *previous_segment = NULL;
262 float playlist_duration = 0.0f;
263 int ret = 0, path_size, sub_path_size;
264 char *dirname = NULL, *p, *sub_path;
266 AVDictionary *options = NULL;
267 AVIOContext *out = NULL;
268 const char *proto = NULL;
270 segment = hls->segments;
272 playlist_duration += segment->duration;
273 segment = segment->next;
276 segment = hls->old_segments;
278 playlist_duration -= segment->duration;
279 previous_segment = segment;
280 segment = previous_segment->next;
281 if (playlist_duration <= -previous_segment->duration) {
282 previous_segment->next = NULL;
287 if (segment && !hls->use_localtime_mkdir) {
288 if (hls->segment_filename) {
289 dirname = av_strdup(hls->segment_filename);
291 dirname = av_strdup(hls->avf->filename);
294 ret = AVERROR(ENOMEM);
297 p = (char *)av_basename(dirname);
302 av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n",
304 path_size = (hls->use_localtime_mkdir ? 0 : strlen(dirname)) + strlen(segment->filename) + 1;
305 path = av_malloc(path_size);
307 ret = AVERROR(ENOMEM);
311 if (hls->use_localtime_mkdir)
312 av_strlcpy(path, segment->filename, path_size);
313 else { // segment->filename contains basename only
314 av_strlcpy(path, dirname, path_size);
315 av_strlcat(path, segment->filename, path_size);
318 proto = avio_find_protocol_name(s->filename);
319 if (hls->method || (proto && !av_strcasecmp(proto, "http"))) {
320 av_dict_set(&options, "method", "DELETE", 0);
321 if ((ret = hls->avf->io_open(hls->avf, &out, path, AVIO_FLAG_WRITE, &options)) < 0)
323 ff_format_io_close(hls->avf, &out);
324 } else if (unlink(path) < 0) {
325 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
326 path, strerror(errno));
329 if ((segment->sub_filename[0] != '\0')) {
330 sub_path_size = strlen(segment->sub_filename) + 1 + (dirname ? strlen(dirname) : 0);
331 sub_path = av_malloc(sub_path_size);
333 ret = AVERROR(ENOMEM);
337 av_strlcpy(sub_path, dirname, sub_path_size);
338 av_strlcat(sub_path, segment->sub_filename, sub_path_size);
340 if (hls->method || (proto && !av_strcasecmp(proto, "http"))) {
341 av_dict_set(&options, "method", "DELETE", 0);
342 if ((ret = hls->avf->io_open(hls->avf, &out, sub_path, AVIO_FLAG_WRITE, &options)) < 0) {
346 ff_format_io_close(hls->avf, &out);
347 } else if (unlink(sub_path) < 0) {
348 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
349 sub_path, strerror(errno));
354 previous_segment = segment;
355 segment = previous_segment->next;
356 av_free(previous_segment);
366 static int randomize(uint8_t *buf, int len)
369 gcry_randomize(buf, len, GCRY_VERY_STRONG_RANDOM);
372 if (RAND_bytes(buf, len))
375 return AVERROR(ENOSYS);
377 return AVERROR(EINVAL);
380 static int do_encrypt(AVFormatContext *s)
382 HLSContext *hls = s->priv_data;
386 uint8_t key[KEYSIZE];
388 len = strlen(hls->basename) + 4 + 1;
389 hls->key_basename = av_mallocz(len);
390 if (!hls->key_basename)
391 return AVERROR(ENOMEM);
393 av_strlcpy(hls->key_basename, s->filename, len);
394 av_strlcat(hls->key_basename, ".key", len);
397 strncpy(hls->key_file, hls->key_url, sizeof(hls->key_file));
398 strncpy(hls->key_uri, hls->key_url, sizeof(hls->key_uri));
400 strncpy(hls->key_file, hls->key_basename, sizeof(hls->key_file));
401 strncpy(hls->key_uri, hls->key_basename, sizeof(hls->key_uri));
404 if (!*hls->iv_string) {
405 uint8_t iv[16] = { 0 };
409 AV_WB64(iv + 8, hls->sequence);
411 memcpy(iv, hls->iv, sizeof(iv));
413 ff_data_to_hex(buf, iv, sizeof(iv), 0);
415 memcpy(hls->iv_string, buf, sizeof(hls->iv_string));
418 if (!*hls->key_uri) {
419 av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
420 return AVERROR(EINVAL);
423 if (!*hls->key_file) {
424 av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
425 return AVERROR(EINVAL);
428 if (!*hls->key_string) {
430 if ((ret = randomize(key, sizeof(key))) < 0) {
431 av_log(s, AV_LOG_ERROR, "Cannot generate a strong random key\n");
435 memcpy(key, hls->key, sizeof(key));
438 ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
439 if ((ret = s->io_open(s, &pb, hls->key_file, AVIO_FLAG_WRITE, NULL)) < 0)
441 avio_seek(pb, 0, SEEK_CUR);
442 avio_write(pb, key, KEYSIZE);
449 static int hls_encryption_start(AVFormatContext *s)
451 HLSContext *hls = s->priv_data;
454 uint8_t key[KEYSIZE];
456 if ((ret = s->io_open(s, &pb, hls->key_info_file, AVIO_FLAG_READ, NULL)) < 0) {
457 av_log(hls, AV_LOG_ERROR,
458 "error opening key info file %s\n", hls->key_info_file);
462 ff_get_line(pb, hls->key_uri, sizeof(hls->key_uri));
463 hls->key_uri[strcspn(hls->key_uri, "\r\n")] = '\0';
465 ff_get_line(pb, hls->key_file, sizeof(hls->key_file));
466 hls->key_file[strcspn(hls->key_file, "\r\n")] = '\0';
468 ff_get_line(pb, hls->iv_string, sizeof(hls->iv_string));
469 hls->iv_string[strcspn(hls->iv_string, "\r\n")] = '\0';
471 ff_format_io_close(s, &pb);
473 if (!*hls->key_uri) {
474 av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
475 return AVERROR(EINVAL);
478 if (!*hls->key_file) {
479 av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
480 return AVERROR(EINVAL);
483 if ((ret = s->io_open(s, &pb, hls->key_file, AVIO_FLAG_READ, NULL)) < 0) {
484 av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", hls->key_file);
488 ret = avio_read(pb, key, sizeof(key));
489 ff_format_io_close(s, &pb);
490 if (ret != sizeof(key)) {
491 av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", hls->key_file);
492 if (ret >= 0 || ret == AVERROR_EOF)
493 ret = AVERROR(EINVAL);
496 ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
501 static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
503 int len = ff_get_line(s, buf, maxlen);
504 while (len > 0 && av_isspace(buf[len - 1]))
509 static int hls_mux_init(AVFormatContext *s)
511 HLSContext *hls = s->priv_data;
513 AVFormatContext *vtt_oc = NULL;
516 ret = avformat_alloc_output_context2(&hls->avf, hls->oformat, NULL, NULL);
521 oc->filename[0] = '\0';
522 oc->oformat = hls->oformat;
523 oc->interrupt_callback = s->interrupt_callback;
524 oc->max_delay = s->max_delay;
525 oc->opaque = s->opaque;
526 oc->io_open = s->io_open;
527 oc->io_close = s->io_close;
528 av_dict_copy(&oc->metadata, s->metadata, 0);
530 if(hls->vtt_oformat) {
531 ret = avformat_alloc_output_context2(&hls->vtt_avf, hls->vtt_oformat, NULL, NULL);
534 vtt_oc = hls->vtt_avf;
535 vtt_oc->oformat = hls->vtt_oformat;
536 av_dict_copy(&vtt_oc->metadata, s->metadata, 0);
539 for (i = 0; i < s->nb_streams; i++) {
541 AVFormatContext *loc;
542 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
547 if (!(st = avformat_new_stream(loc, NULL)))
548 return AVERROR(ENOMEM);
549 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
550 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
551 st->time_base = s->streams[i]->time_base;
552 av_dict_copy(&st->metadata, s->streams[i]->metadata, 0);
560 static HLSSegment *find_segment_by_filename(HLSSegment *segment, const char *filename)
563 if (!av_strcasecmp(segment->filename,filename))
565 segment = segment->next;
567 return (HLSSegment *) NULL;
570 static int sls_flags_filename_process(struct AVFormatContext *s, HLSContext *hls, HLSSegment *en, double duration,
571 int64_t pos, int64_t size)
573 if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
574 strlen(hls->current_segment_final_filename_fmt)) {
575 av_strlcpy(hls->avf->filename, hls->current_segment_final_filename_fmt, sizeof(hls->avf->filename));
576 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
577 char * filename = av_strdup(hls->avf->filename); // %%s will be %s after strftime
580 return AVERROR(ENOMEM);
582 if (replace_int_data_in_filename(hls->avf->filename, sizeof(hls->avf->filename),
583 filename, 's', pos + size) < 1) {
584 av_log(hls, AV_LOG_ERROR,
585 "Invalid second level segment filename template '%s', "
586 "you can try to remove second_level_segment_size flag\n",
590 return AVERROR(EINVAL);
594 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
595 char * filename = av_strdup(hls->avf->filename); // %%t will be %t after strftime
598 return AVERROR(ENOMEM);
600 if (replace_int_data_in_filename(hls->avf->filename, sizeof(hls->avf->filename),
601 filename, 't', (int64_t)round(duration * HLS_MICROSECOND_UNIT)) < 1) {
602 av_log(hls, AV_LOG_ERROR,
603 "Invalid second level segment filename template '%s', "
604 "you can try to remove second_level_segment_time flag\n",
608 return AVERROR(EINVAL);
616 static int sls_flag_check_duration_size_index(HLSContext *hls)
620 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
621 av_log(hls, AV_LOG_ERROR,
622 "second_level_segment_duration hls_flag requires use_localtime to be true\n");
623 ret = AVERROR(EINVAL);
625 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
626 av_log(hls, AV_LOG_ERROR,
627 "second_level_segment_size hls_flag requires use_localtime to be true\n");
628 ret = AVERROR(EINVAL);
630 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_INDEX) {
631 av_log(hls, AV_LOG_ERROR,
632 "second_level_segment_index hls_flag requires use_localtime to be true\n");
633 ret = AVERROR(EINVAL);
639 static int sls_flag_check_duration_size(HLSContext *hls)
641 const char *proto = avio_find_protocol_name(hls->basename);
642 int segment_renaming_ok = proto && !strcmp(proto, "file");
645 if ((hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) && !segment_renaming_ok) {
646 av_log(hls, AV_LOG_ERROR,
647 "second_level_segment_duration hls_flag works only with file protocol segment names\n");
648 ret = AVERROR(EINVAL);
650 if ((hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) && !segment_renaming_ok) {
651 av_log(hls, AV_LOG_ERROR,
652 "second_level_segment_size hls_flag works only with file protocol segment names\n");
653 ret = AVERROR(EINVAL);
659 static void sls_flag_file_rename(HLSContext *hls, char *old_filename) {
660 if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
661 strlen(hls->current_segment_final_filename_fmt)) {
662 ff_rename(old_filename, hls->avf->filename, hls);
666 static int sls_flag_use_localtime_filename(AVFormatContext *oc, HLSContext *c)
668 if (c->flags & HLS_SECOND_LEVEL_SEGMENT_INDEX) {
669 char * filename = av_strdup(oc->filename); // %%d will be %d after strftime
671 return AVERROR(ENOMEM);
672 if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
674 filename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
676 filename, 'd', c->sequence) < 1) {
678 av_log(c, AV_LOG_ERROR, "Invalid second level segment filename template '%s', "
679 "you can try to remove second_level_segment_index flag\n",
682 return AVERROR(EINVAL);
686 if (c->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) {
687 av_strlcpy(c->current_segment_final_filename_fmt, oc->filename,
688 sizeof(c->current_segment_final_filename_fmt));
689 if (c->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
690 char * filename = av_strdup(oc->filename); // %%s will be %s after strftime
692 return AVERROR(ENOMEM);
693 if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename), filename, 's', 0) < 1) {
694 av_log(c, AV_LOG_ERROR, "Invalid second level segment filename template '%s', "
695 "you can try to remove second_level_segment_size flag\n",
698 return AVERROR(EINVAL);
702 if (c->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
703 char * filename = av_strdup(oc->filename); // %%t will be %t after strftime
705 return AVERROR(ENOMEM);
706 if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename), filename, 't', 0) < 1) {
707 av_log(c, AV_LOG_ERROR, "Invalid second level segment filename template '%s', "
708 "you can try to remove second_level_segment_time flag\n",
711 return AVERROR(EINVAL);
719 /* Create a new segment and append it to the segment list */
720 static int hls_append_segment(struct AVFormatContext *s, HLSContext *hls, double duration,
721 int64_t pos, int64_t size)
723 HLSSegment *en = av_malloc(sizeof(*en));
724 const char *filename;
728 return AVERROR(ENOMEM);
730 ret = sls_flags_filename_process(s, hls, en, duration, pos, size);
735 filename = av_basename(hls->avf->filename);
737 if (hls->use_localtime_mkdir) {
738 filename = hls->avf->filename;
740 if (find_segment_by_filename(hls->segments, filename)
741 || find_segment_by_filename(hls->old_segments, filename)) {
742 av_log(hls, AV_LOG_WARNING, "Duplicated segment filename detected: %s\n", filename);
744 av_strlcpy(en->filename, filename, sizeof(en->filename));
746 if(hls->has_subtitle)
747 av_strlcpy(en->sub_filename, av_basename(hls->vtt_avf->filename), sizeof(en->sub_filename));
749 en->sub_filename[0] = '\0';
751 en->duration = duration;
757 if (hls->discontinuity) {
759 hls->discontinuity = 0;
762 if (hls->key_info_file || hls->encrypt) {
763 av_strlcpy(en->key_uri, hls->key_uri, sizeof(en->key_uri));
764 av_strlcpy(en->iv_string, hls->iv_string, sizeof(en->iv_string));
770 hls->last_segment->next = en;
772 hls->last_segment = en;
774 // EVENT or VOD playlists imply sliding window cannot be used
775 if (hls->pl_type != PLAYLIST_TYPE_NONE)
776 hls->max_nb_segments = 0;
778 if (hls->max_nb_segments && hls->nb_entries >= hls->max_nb_segments) {
780 hls->initial_prog_date_time += en->duration;
781 hls->segments = en->next;
782 if (en && hls->flags & HLS_DELETE_SEGMENTS &&
784 !(hls->flags & HLS_SINGLE_FILE || hls->wrap)) {
786 !(hls->flags & HLS_SINGLE_FILE)) {
788 en->next = hls->old_segments;
789 hls->old_segments = en;
790 if ((ret = hls_delete_old_segments(s, hls)) < 0)
797 if (hls->max_seg_size > 0) {
805 static int parse_playlist(AVFormatContext *s, const char *url)
807 HLSContext *hls = s->priv_data;
809 int ret = 0, is_segment = 0;
810 int64_t new_start_pos;
814 if ((ret = ffio_open_whitelist(&in, url, AVIO_FLAG_READ,
815 &s->interrupt_callback, NULL,
816 s->protocol_whitelist, s->protocol_blacklist)) < 0)
819 read_chomp_line(in, line, sizeof(line));
820 if (strcmp(line, "#EXTM3U")) {
821 ret = AVERROR_INVALIDDATA;
825 hls->discontinuity = 0;
826 while (!avio_feof(in)) {
827 read_chomp_line(in, line, sizeof(line));
828 if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
829 int64_t tmp_sequence = strtoll(ptr, NULL, 10);
830 if (tmp_sequence < hls->sequence)
831 av_log(hls, AV_LOG_VERBOSE,
832 "Found playlist sequence number was smaller """
833 "than specified start sequence number: %"PRId64" < %"PRId64", "
834 "omitting\n", tmp_sequence, hls->start_sequence);
836 av_log(hls, AV_LOG_DEBUG, "Found playlist sequence number: %"PRId64"\n", tmp_sequence);
837 hls->sequence = tmp_sequence;
839 } else if (av_strstart(line, "#EXT-X-DISCONTINUITY", &ptr)) {
841 hls->discontinuity = 1;
842 } else if (av_strstart(line, "#EXTINF:", &ptr)) {
844 hls->duration = atof(ptr);
845 } else if (av_strstart(line, "#", NULL)) {
847 } else if (line[0]) {
850 new_start_pos = avio_tell(hls->avf->pb);
851 hls->size = new_start_pos - hls->start_pos;
852 av_strlcpy(hls->avf->filename, line, sizeof(line));
853 ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
856 hls->start_pos = new_start_pos;
866 static void hls_free_segments(HLSSegment *p)
877 static void set_http_options(AVFormatContext *s, AVDictionary **options, HLSContext *c)
879 const char *proto = avio_find_protocol_name(s->filename);
880 int http_base_proto = proto ? (!av_strcasecmp(proto, "http") || !av_strcasecmp(proto, "https")) : 0;
883 av_dict_set(options, "method", c->method, 0);
884 } else if (http_base_proto) {
885 av_log(c, AV_LOG_WARNING, "No HTTP method set, hls muxer defaulting to method PUT.\n");
886 av_dict_set(options, "method", "PUT", 0);
890 static void write_m3u8_head_block(HLSContext *hls, AVIOContext *out, int version,
891 int target_duration, int64_t sequence)
893 avio_printf(out, "#EXTM3U\n");
894 avio_printf(out, "#EXT-X-VERSION:%d\n", version);
895 if (hls->allowcache == 0 || hls->allowcache == 1) {
896 avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
898 avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
899 avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
900 av_log(hls, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
903 static void hls_rename_temp_file(AVFormatContext *s, AVFormatContext *oc)
905 size_t len = strlen(oc->filename);
906 char final_filename[sizeof(oc->filename)];
908 av_strlcpy(final_filename, oc->filename, len);
909 final_filename[len-4] = '\0';
910 ff_rename(oc->filename, final_filename, s);
911 oc->filename[len-4] = '\0';
914 static int hls_window(AVFormatContext *s, int last)
916 HLSContext *hls = s->priv_data;
918 int target_duration = 0;
920 AVIOContext *out = NULL;
921 AVIOContext *sub_out = NULL;
922 char temp_filename[1024];
923 int64_t sequence = FFMAX(hls->start_sequence, hls->sequence - hls->nb_entries);
925 const char *proto = avio_find_protocol_name(s->filename);
926 int use_rename = proto && !strcmp(proto, "file");
927 static unsigned warned_non_file;
928 char *key_uri = NULL;
929 char *iv_string = NULL;
930 AVDictionary *options = NULL;
931 double prog_date_time = hls->initial_prog_date_time;
932 int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
934 if (byterange_mode) {
939 if (!use_rename && !warned_non_file++)
940 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
942 set_http_options(s, &options, hls);
943 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
944 if ((ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, &options)) < 0)
947 for (en = hls->segments; en; en = en->next) {
948 if (target_duration <= en->duration)
949 target_duration = get_int_from_double(en->duration);
952 hls->discontinuity_set = 0;
953 write_m3u8_head_block(hls, out, version, target_duration, sequence);
954 if (hls->pl_type == PLAYLIST_TYPE_EVENT) {
955 avio_printf(out, "#EXT-X-PLAYLIST-TYPE:EVENT\n");
956 } else if (hls->pl_type == PLAYLIST_TYPE_VOD) {
957 avio_printf(out, "#EXT-X-PLAYLIST-TYPE:VOD\n");
960 if((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && hls->discontinuity_set==0 ){
961 avio_printf(out, "#EXT-X-DISCONTINUITY\n");
962 hls->discontinuity_set = 1;
964 for (en = hls->segments; en; en = en->next) {
965 if ((hls->encrypt || hls->key_info_file) && (!key_uri || strcmp(en->key_uri, key_uri) ||
966 av_strcasecmp(en->iv_string, iv_string))) {
967 avio_printf(out, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"", en->key_uri);
969 avio_printf(out, ",IV=0x%s", en->iv_string);
970 avio_printf(out, "\n");
971 key_uri = en->key_uri;
972 iv_string = en->iv_string;
976 avio_printf(out, "#EXT-X-DISCONTINUITY\n");
979 if (hls->flags & HLS_ROUND_DURATIONS)
980 avio_printf(out, "#EXTINF:%ld,\n", lrint(en->duration));
982 avio_printf(out, "#EXTINF:%f,\n", en->duration);
984 avio_printf(out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
986 if (hls->flags & HLS_PROGRAM_DATE_TIME) {
987 time_t tt, wrongsecs;
989 struct tm *tm, tmpbuf;
990 char buf0[128], buf1[128];
991 tt = (int64_t)prog_date_time;
992 milli = av_clip(lrint(1000*(prog_date_time - tt)), 0, 999);
993 tm = localtime_r(&tt, &tmpbuf);
994 strftime(buf0, sizeof(buf0), "%Y-%m-%dT%H:%M:%S", tm);
995 if (!strftime(buf1, sizeof(buf1), "%z", tm) || buf1[1]<'0' ||buf1[1]>'2') {
996 int tz_min, dst = tm->tm_isdst;
997 tm = gmtime_r(&tt, &tmpbuf);
999 wrongsecs = mktime(tm);
1000 tz_min = (abs(wrongsecs - tt) + 30) / 60;
1001 snprintf(buf1, sizeof(buf1),
1003 wrongsecs <= tt ? '+' : '-',
1007 avio_printf(out, "#EXT-X-PROGRAM-DATE-TIME:%s.%03d%s\n", buf0, milli, buf1);
1008 prog_date_time += en->duration;
1011 avio_printf(out, "%s", hls->baseurl);
1012 avio_printf(out, "%s\n", en->filename);
1015 if (last && (hls->flags & HLS_OMIT_ENDLIST)==0)
1016 avio_printf(out, "#EXT-X-ENDLIST\n");
1018 if( hls->vtt_m3u8_name ) {
1019 if ((ret = s->io_open(s, &sub_out, hls->vtt_m3u8_name, AVIO_FLAG_WRITE, &options)) < 0)
1021 write_m3u8_head_block(hls, sub_out, version, target_duration, sequence);
1023 for (en = hls->segments; en; en = en->next) {
1024 avio_printf(sub_out, "#EXTINF:%f,\n", en->duration);
1026 avio_printf(sub_out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
1029 avio_printf(sub_out, "%s", hls->baseurl);
1030 avio_printf(sub_out, "%s\n", en->sub_filename);
1034 avio_printf(sub_out, "#EXT-X-ENDLIST\n");
1039 av_dict_free(&options);
1040 ff_format_io_close(s, &out);
1041 ff_format_io_close(s, &sub_out);
1042 if (ret >= 0 && use_rename)
1043 ff_rename(temp_filename, s->filename, s);
1047 static int hls_start(AVFormatContext *s)
1049 HLSContext *c = s->priv_data;
1050 AVFormatContext *oc = c->avf;
1051 AVFormatContext *vtt_oc = c->vtt_avf;
1052 AVDictionary *options = NULL;
1053 char *filename, iv_string[KEYSIZE*2 + 1];
1056 if (c->flags & HLS_SINGLE_FILE) {
1057 av_strlcpy(oc->filename, c->basename,
1058 sizeof(oc->filename));
1059 if (c->vtt_basename)
1060 av_strlcpy(vtt_oc->filename, c->vtt_basename,
1061 sizeof(vtt_oc->filename));
1062 } else if (c->max_seg_size > 0) {
1063 if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
1065 c->basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
1067 c->basename, 'd', c->sequence) < 1) {
1069 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s', you can try to use -use_localtime 1 with it\n", c->basename);
1070 return AVERROR(EINVAL);
1073 if (c->use_localtime) {
1075 struct tm *tm, tmpbuf;
1077 tm = localtime_r(&now0, &tmpbuf);
1078 if (!strftime(oc->filename, sizeof(oc->filename), c->basename, tm)) {
1079 av_log(oc, AV_LOG_ERROR, "Could not get segment filename with use_localtime\n");
1080 return AVERROR(EINVAL);
1083 err = sls_flag_use_localtime_filename(oc, c);
1085 return AVERROR(ENOMEM);
1088 if (c->use_localtime_mkdir) {
1090 char *fn_copy = av_strdup(oc->filename);
1092 return AVERROR(ENOMEM);
1094 dir = av_dirname(fn_copy);
1095 if (mkdir_p(dir) == -1 && errno != EEXIST) {
1096 av_log(oc, AV_LOG_ERROR, "Could not create directory %s with use_localtime_mkdir\n", dir);
1098 return AVERROR(errno);
1102 } else if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
1104 c->basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
1106 c->basename, 'd', c->sequence) < 1) {
1108 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try to use -use_localtime 1 with it\n", c->basename);
1109 return AVERROR(EINVAL);
1111 if( c->vtt_basename) {
1112 if (replace_int_data_in_filename(vtt_oc->filename, sizeof(vtt_oc->filename),
1114 c->vtt_basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
1116 c->vtt_basename, 'd', c->sequence) < 1) {
1118 av_log(vtt_oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", c->vtt_basename);
1119 return AVERROR(EINVAL);
1125 set_http_options(s, &options, c);
1127 if (c->flags & HLS_TEMP_FILE) {
1128 av_strlcat(oc->filename, ".tmp", sizeof(oc->filename));
1131 if (c->key_info_file || c->encrypt) {
1132 if (c->key_info_file && c->encrypt) {
1133 av_log(s, AV_LOG_WARNING, "Cannot use both -hls_key_info_file and -hls_enc,"
1134 " will use -hls_key_info_file priority\n");
1136 if (c->key_info_file) {
1137 if ((err = hls_encryption_start(s)) < 0)
1140 if ((err = do_encrypt(s)) < 0)
1143 if ((err = av_dict_set(&options, "encryption_key", c->key_string, 0))
1146 err = av_strlcpy(iv_string, c->iv_string, sizeof(iv_string));
1148 snprintf(iv_string, sizeof(iv_string), "%032"PRIx64, c->sequence);
1149 if ((err = av_dict_set(&options, "encryption_iv", iv_string, 0)) < 0)
1152 filename = av_asprintf("crypto:%s", oc->filename);
1154 err = AVERROR(ENOMEM);
1157 err = s->io_open(s, &oc->pb, filename, AVIO_FLAG_WRITE, &options);
1159 av_dict_free(&options);
1163 if ((err = s->io_open(s, &oc->pb, oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
1165 if (c->vtt_basename) {
1166 set_http_options(s, &options, c);
1167 if ((err = s->io_open(s, &vtt_oc->pb, vtt_oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
1170 av_dict_free(&options);
1172 /* We only require one PAT/PMT per segment. */
1173 if (oc->oformat->priv_class && oc->priv_data) {
1176 snprintf(period, sizeof(period), "%d", (INT_MAX / 2) - 1);
1178 av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0);
1179 av_opt_set(oc->priv_data, "sdt_period", period, 0);
1180 av_opt_set(oc->priv_data, "pat_period", period, 0);
1183 if (c->vtt_basename) {
1184 err = avformat_write_header(vtt_oc,NULL);
1191 av_dict_free(&options);
1196 static const char * get_default_pattern_localtime_fmt(void)
1199 time_t t = time(NULL);
1200 struct tm *p, tmbuf;
1201 p = localtime_r(&t, &tmbuf);
1202 // no %s support when strftime returned error or left format string unchanged
1203 // also no %s support on MSVC, which invokes the invalid parameter handler on unsupported format strings, instead of returning an error
1204 return (HAVE_LIBC_MSVCRT || !strftime(b, sizeof(b), "%s", p) || !strcmp(b, "%s")) ? "-%Y%m%d%H%M%S.ts" : "-%s.ts";
1207 static int hls_write_header(AVFormatContext *s)
1209 HLSContext *hls = s->priv_data;
1212 const char *pattern = "%d.ts";
1213 const char *pattern_localtime_fmt = get_default_pattern_localtime_fmt();
1214 const char *vtt_pattern = "%d.vtt";
1215 AVDictionary *options = NULL;
1217 int vtt_basename_size;
1219 if ((hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH) ||
1220 (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_FORMATTED_DATETIME)) {
1221 time_t t = time(NULL); // we will need it in either case
1222 if (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH) {
1223 hls->start_sequence = (int64_t)t;
1224 } else if (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_FORMATTED_DATETIME) {
1226 struct tm *p, tmbuf;
1227 if (!(p = localtime_r(&t, &tmbuf)))
1228 return AVERROR(ENOMEM);
1229 if (!strftime(b, sizeof(b), "%Y%m%d%H%M%S", p))
1230 return AVERROR(ENOMEM);
1231 hls->start_sequence = strtoll(b, NULL, 10);
1233 av_log(hls, AV_LOG_DEBUG, "start_number evaluated to %"PRId64"\n", hls->start_sequence);
1236 hls->sequence = hls->start_sequence;
1237 hls->recording_time = (hls->init_time ? hls->init_time : hls->time) * AV_TIME_BASE;
1238 hls->start_pts = AV_NOPTS_VALUE;
1239 hls->current_segment_final_filename_fmt[0] = '\0';
1241 if (hls->flags & HLS_PROGRAM_DATE_TIME) {
1244 hls->initial_prog_date_time = now0;
1247 if (hls->format_options_str) {
1248 ret = av_dict_parse_string(&hls->format_options, hls->format_options_str, "=", ":", 0);
1250 av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", hls->format_options_str);
1255 for (i = 0; i < s->nb_streams; i++) {
1257 s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
1258 hls->has_subtitle +=
1259 s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE;
1262 if (hls->has_video > 1)
1263 av_log(s, AV_LOG_WARNING,
1264 "More than a single video stream present, "
1265 "expect issues decoding it.\n");
1267 hls->oformat = av_guess_format("mpegts", NULL, NULL);
1269 if (!hls->oformat) {
1270 ret = AVERROR_MUXER_NOT_FOUND;
1274 if(hls->has_subtitle) {
1275 hls->vtt_oformat = av_guess_format("webvtt", NULL, NULL);
1276 if (!hls->oformat) {
1277 ret = AVERROR_MUXER_NOT_FOUND;
1282 if (hls->segment_filename) {
1283 hls->basename = av_strdup(hls->segment_filename);
1284 if (!hls->basename) {
1285 ret = AVERROR(ENOMEM);
1289 if (hls->flags & HLS_SINGLE_FILE)
1292 if (hls->use_localtime) {
1293 basename_size = strlen(s->filename) + strlen(pattern_localtime_fmt) + 1;
1295 basename_size = strlen(s->filename) + strlen(pattern) + 1;
1297 hls->basename = av_malloc(basename_size);
1298 if (!hls->basename) {
1299 ret = AVERROR(ENOMEM);
1303 av_strlcpy(hls->basename, s->filename, basename_size);
1305 p = strrchr(hls->basename, '.');
1308 if (hls->use_localtime) {
1309 av_strlcat(hls->basename, pattern_localtime_fmt, basename_size);
1311 av_strlcat(hls->basename, pattern, basename_size);
1314 if (!hls->use_localtime) {
1315 ret = sls_flag_check_duration_size_index(hls);
1320 ret = sls_flag_check_duration_size(hls);
1325 if(hls->has_subtitle) {
1327 if (hls->flags & HLS_SINGLE_FILE)
1328 vtt_pattern = ".vtt";
1329 vtt_basename_size = strlen(s->filename) + strlen(vtt_pattern) + 1;
1330 hls->vtt_basename = av_malloc(vtt_basename_size);
1331 if (!hls->vtt_basename) {
1332 ret = AVERROR(ENOMEM);
1335 hls->vtt_m3u8_name = av_malloc(vtt_basename_size);
1336 if (!hls->vtt_m3u8_name ) {
1337 ret = AVERROR(ENOMEM);
1340 av_strlcpy(hls->vtt_basename, s->filename, vtt_basename_size);
1341 p = strrchr(hls->vtt_basename, '.');
1345 if( hls->subtitle_filename ) {
1346 strcpy(hls->vtt_m3u8_name, hls->subtitle_filename);
1348 strcpy(hls->vtt_m3u8_name, hls->vtt_basename);
1349 av_strlcat(hls->vtt_m3u8_name, "_vtt.m3u8", vtt_basename_size);
1351 av_strlcat(hls->vtt_basename, vtt_pattern, vtt_basename_size);
1354 if ((ret = hls_mux_init(s)) < 0)
1357 if (hls->flags & HLS_APPEND_LIST) {
1358 parse_playlist(s, s->filename);
1359 hls->discontinuity = 1;
1360 if (hls->init_time > 0) {
1361 av_log(s, AV_LOG_WARNING, "append_list mode does not support hls_init_time,"
1362 " hls_init_time value will have no effect\n");
1364 hls->recording_time = hls->time * AV_TIME_BASE;
1368 if ((ret = hls_start(s)) < 0)
1371 av_dict_copy(&options, hls->format_options, 0);
1372 ret = avformat_write_header(hls->avf, &options);
1373 if (av_dict_count(options)) {
1374 av_log(s, AV_LOG_ERROR, "Some of provided format options in '%s' are not recognized\n", hls->format_options_str);
1375 ret = AVERROR(EINVAL);
1378 //av_assert0(s->nb_streams == hls->avf->nb_streams);
1379 for (i = 0; i < s->nb_streams; i++) {
1381 AVStream *outer_st = s->streams[i];
1383 if (hls->max_seg_size > 0) {
1384 if ((outer_st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1385 (outer_st->codecpar->bit_rate > hls->max_seg_size)) {
1386 av_log(s, AV_LOG_WARNING, "Your video bitrate is bigger than hls_segment_size, "
1387 "(%"PRId64 " > %"PRId64 "), the result maybe not be what you want.",
1388 outer_st->codecpar->bit_rate, hls->max_seg_size);
1392 if (outer_st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
1393 inner_st = hls->avf->streams[i];
1394 else if (hls->vtt_avf)
1395 inner_st = hls->vtt_avf->streams[0];
1397 /* We have a subtitle stream, when the user does not want one */
1401 avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
1405 av_dict_free(&options);
1407 av_freep(&hls->basename);
1408 av_freep(&hls->vtt_basename);
1409 av_freep(&hls->key_basename);
1411 avformat_free_context(hls->avf);
1413 avformat_free_context(hls->vtt_avf);
1419 static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
1421 HLSContext *hls = s->priv_data;
1422 AVFormatContext *oc = NULL;
1423 AVStream *st = s->streams[pkt->stream_index];
1424 int64_t end_pts = hls->recording_time * hls->number;
1426 int ret, can_split = 1;
1427 int stream_index = 0;
1429 if (hls->sequence - hls->nb_entries > hls->start_sequence && hls->init_time > 0) {
1430 /* reset end_pts, hls->recording_time at end of the init hls list */
1431 int init_list_dur = hls->init_time * hls->nb_entries * AV_TIME_BASE;
1432 int after_init_list_dur = (hls->sequence - hls->nb_entries ) * hls->time * AV_TIME_BASE;
1433 hls->recording_time = hls->time * AV_TIME_BASE;
1434 end_pts = init_list_dur + after_init_list_dur ;
1437 if( st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
1442 stream_index = pkt->stream_index;
1444 if (hls->start_pts == AV_NOPTS_VALUE) {
1445 hls->start_pts = pkt->pts;
1446 hls->end_pts = pkt->pts;
1449 if (hls->has_video) {
1450 can_split = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1451 ((pkt->flags & AV_PKT_FLAG_KEY) || (hls->flags & HLS_SPLIT_BY_TIME));
1452 is_ref_pkt = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
1454 if (pkt->pts == AV_NOPTS_VALUE)
1455 is_ref_pkt = can_split = 0;
1458 if (hls->new_start) {
1460 hls->duration = (double)(pkt->pts - hls->end_pts)
1461 * st->time_base.num / st->time_base.den;
1462 hls->dpp = (double)(pkt->duration) * st->time_base.num / st->time_base.den;
1464 if (pkt->duration) {
1465 hls->duration += (double)(pkt->duration) * st->time_base.num / st->time_base.den;
1467 av_log(s, AV_LOG_WARNING, "pkt->duration = 0, maybe the hls segment duration will not precise\n");
1468 hls->duration = (double)(pkt->pts - hls->end_pts) * st->time_base.num / st->time_base.den;
1473 if (can_split && av_compare_ts(pkt->pts - hls->start_pts, st->time_base,
1474 end_pts, AV_TIME_BASE_Q) >= 0) {
1475 int64_t new_start_pos;
1476 char *old_filename = av_strdup(hls->avf->filename);
1477 int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
1479 if (!old_filename) {
1480 return AVERROR(ENOMEM);
1483 av_write_frame(oc, NULL); /* Flush any buffered data */
1485 new_start_pos = avio_tell(hls->avf->pb);
1486 hls->size = new_start_pos - hls->start_pos;
1488 if (!byterange_mode) {
1489 ff_format_io_close(s, &oc->pb);
1491 ff_format_io_close(s, &hls->vtt_avf->pb);
1494 if ((hls->flags & HLS_TEMP_FILE) && oc->filename[0]) {
1495 if (!(hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size <= 0))
1496 if (hls->avf->oformat->priv_class && hls->avf->priv_data)
1497 av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
1498 hls_rename_temp_file(s, oc);
1501 ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
1502 hls->start_pos = new_start_pos;
1504 av_free(old_filename);
1508 hls->end_pts = pkt->pts;
1511 if (hls->flags & HLS_SINGLE_FILE) {
1513 } else if (hls->max_seg_size > 0) {
1514 if (hls->start_pos >= hls->max_seg_size) {
1516 sls_flag_file_rename(hls, old_filename);
1519 /* When split segment by byte, the duration is short than hls_time,
1520 * so it is not enough one segment duration as hls_time, */
1525 sls_flag_file_rename(hls, old_filename);
1530 av_free(old_filename);
1534 if ((ret = hls_window(s, 0)) < 0) {
1535 av_free(old_filename);
1540 ret = ff_write_chained(oc, stream_index, pkt, s, 0);
1545 static int hls_write_trailer(struct AVFormatContext *s)
1547 HLSContext *hls = s->priv_data;
1548 AVFormatContext *oc = hls->avf;
1549 AVFormatContext *vtt_oc = hls->vtt_avf;
1550 char *old_filename = av_strdup(hls->avf->filename);
1552 if (!old_filename) {
1553 return AVERROR(ENOMEM);
1557 av_write_trailer(oc);
1559 hls->size = avio_tell(hls->avf->pb) - hls->start_pos;
1560 ff_format_io_close(s, &oc->pb);
1562 if ((hls->flags & HLS_TEMP_FILE) && oc->filename[0]) {
1563 hls_rename_temp_file(s, oc);
1566 /* after av_write_trailer, then duration + 1 duration per packet */
1567 hls_append_segment(s, hls, hls->duration + hls->dpp, hls->start_pos, hls->size);
1570 sls_flag_file_rename(hls, old_filename);
1574 av_write_trailer(vtt_oc);
1575 hls->size = avio_tell(hls->vtt_avf->pb) - hls->start_pos;
1576 ff_format_io_close(s, &vtt_oc->pb);
1578 av_freep(&hls->basename);
1579 av_freep(&hls->key_basename);
1580 avformat_free_context(oc);
1586 av_freep(&hls->vtt_basename);
1587 av_freep(&hls->vtt_m3u8_name);
1588 avformat_free_context(vtt_oc);
1591 hls_free_segments(hls->segments);
1592 hls_free_segments(hls->old_segments);
1593 av_free(old_filename);
1597 #define OFFSET(x) offsetof(HLSContext, x)
1598 #define E AV_OPT_FLAG_ENCODING_PARAM
1599 static const AVOption options[] = {
1600 {"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
1601 {"hls_time", "set segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E},
1602 {"hls_init_time", "set segment length in seconds at init list", OFFSET(init_time), AV_OPT_TYPE_FLOAT, {.dbl = 0}, 0, FLT_MAX, E},
1603 {"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
1604 {"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},
1605 {"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},
1607 {"hls_wrap", "set number after which the index wraps (will be deprecated)", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
1609 {"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},
1610 {"hls_base_url", "url to prepend to each playlist entry", OFFSET(baseurl), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1611 {"hls_segment_filename", "filename template for segment files", OFFSET(segment_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1612 {"hls_segment_size", "maximum size per segment file, (in bytes)", OFFSET(max_seg_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
1613 {"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},
1614 {"hls_enc", "enable AES128 encryption support", OFFSET(encrypt), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E},
1615 {"hls_enc_key", "hex-coded 16 byte key to encrypt the segments", OFFSET(key), AV_OPT_TYPE_STRING, .flags = E},
1616 {"hls_enc_key_url", "url to access the key to decrypt the segments", OFFSET(key_url), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1617 {"hls_enc_iv", "hex-coded 16 byte initialization vector", OFFSET(iv), AV_OPT_TYPE_STRING, .flags = E},
1618 {"hls_subtitle_path", "set path of hls subtitles", OFFSET(subtitle_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1619 {"hls_flags", "set flags affecting HLS playlist and media file generation", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0 }, 0, UINT_MAX, E, "flags"},
1620 {"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"},
1621 {"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"},
1622 {"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"},
1623 {"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, "flags"},
1624 {"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, "flags"},
1625 {"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, "flags"},
1626 {"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"},
1627 {"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"},
1628 {"program_date_time", "add EXT-X-PROGRAM-DATE-TIME", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_PROGRAM_DATE_TIME }, 0, UINT_MAX, E, "flags"},
1629 {"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"},
1630 {"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"},
1631 {"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"},
1632 {"use_localtime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1633 {"use_localtime_mkdir", "create last directory component in strftime-generated filename", OFFSET(use_localtime_mkdir), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1634 {"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" },
1635 {"event", "EVENT playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_EVENT }, INT_MIN, INT_MAX, E, "pl_type" },
1636 {"vod", "VOD playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_VOD }, INT_MIN, INT_MAX, E, "pl_type" },
1637 {"method", "set the HTTP method(default: PUT)", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1638 {"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" },
1639 {"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" },
1640 {"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" },
1641 {"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" },
1645 static const AVClass hls_class = {
1646 .class_name = "hls muxer",
1647 .item_name = av_default_item_name,
1649 .version = LIBAVUTIL_VERSION_INT,
1653 AVOutputFormat ff_hls_muxer = {
1655 .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
1656 .extensions = "m3u8",
1657 .priv_data_size = sizeof(HLSContext),
1658 .audio_codec = AV_CODEC_ID_AAC,
1659 .video_codec = AV_CODEC_ID_H264,
1660 .subtitle_codec = AV_CODEC_ID_WEBVTT,
1661 .flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH,
1662 .write_header = hls_write_header,
1663 .write_packet = hls_write_packet,
1664 .write_trailer = hls_write_trailer,
1665 .priv_class = &hls_class,