2 * Copyright (c) 2011, Luca Barbato
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 * @file generic segmenter
23 * M3U8 specification can be find here:
24 * @url{http://tools.ietf.org/id/draft-pantos-http-live-streaming}
33 #include "avio_internal.h"
36 #include "libavutil/avassert.h"
37 #include "libavutil/internal.h"
38 #include "libavutil/log.h"
39 #include "libavutil/opt.h"
40 #include "libavutil/avstring.h"
41 #include "libavutil/parseutils.h"
42 #include "libavutil/mathematics.h"
43 #include "libavutil/time.h"
44 #include "libavutil/time_internal.h"
45 #include "libavutil/timestamp.h"
47 typedef struct SegmentListEntry {
49 double start_time, end_time;
53 struct SegmentListEntry *next;
54 int64_t last_duration;
58 LIST_TYPE_UNDEFINED = -1,
62 LIST_TYPE_EXT, ///< deprecated
67 #define SEGMENT_LIST_FLAG_CACHE 1
68 #define SEGMENT_LIST_FLAG_LIVE 2
70 typedef struct SegmentContext {
71 const AVClass *class; /**< Class for private options. */
72 int segment_idx; ///< index of the segment file to write, starting from 0
73 int segment_idx_wrap; ///< number after which the index wraps
74 int segment_idx_wrap_nb; ///< number of time the index has wraped
75 int segment_count; ///< number of segment files already written
76 AVOutputFormat *oformat;
78 char *format; ///< format to use for output segment files
79 char *format_options_str; ///< format options to use for output segment files
80 AVDictionary *format_options;
81 char *list; ///< filename for the segment list file
82 int list_flags; ///< flags affecting list generation
83 int list_size; ///< number of entries for the segment list file
85 int use_clocktime; ///< flag to cut segments at regular clock time
86 int64_t clocktime_offset; //< clock offset for cutting the segments at regular clock time
87 int64_t clocktime_wrap_duration; //< wrapping duration considered for starting a new segment
88 int64_t last_val; ///< remember last time for wrap around detection
89 int64_t last_cut; ///< remember last cut
92 char *entry_prefix; ///< prefix to add to list entry filenames
93 int list_type; ///< set the list type
94 AVIOContext *list_pb; ///< list file put-byte context
95 char *time_str; ///< segment duration specification string
96 int64_t time; ///< segment duration
97 int use_strftime; ///< flag to expand filename with strftime
99 char *times_str; ///< segment times specification string
100 int64_t *times; ///< list of segment interval specification
101 int nb_times; ///< number of elments in the times array
103 char *frames_str; ///< segment frame numbers specification string
104 int *frames; ///< list of frame number specification
105 int nb_frames; ///< number of elments in the frames array
106 int frame_count; ///< total number of reference frames
107 int segment_frame_count; ///< number of reference frames in the segment
110 int individual_header_trailer; /**< Set by a private option. */
111 int write_header_trailer; /**< Set by a private option. */
112 char *header_filename; ///< filename to write the output header to
114 int reset_timestamps; ///< reset timestamps at the begin of each segment
115 int64_t initial_offset; ///< initial timestamps offset, expressed in microseconds
116 char *reference_stream_specifier; ///< reference stream specifier
117 int reference_stream_index;
118 int break_non_keyframes;
121 char temp_list_filename[1024];
123 SegmentListEntry cur_entry;
124 SegmentListEntry *segment_list_entries;
125 SegmentListEntry *segment_list_entries_end;
128 static void print_csv_escaped_str(AVIOContext *ctx, const char *str)
130 int needs_quoting = !!str[strcspn(str, "\",\n\r")];
135 for (; *str; str++) {
144 static int segment_mux_init(AVFormatContext *s)
146 SegmentContext *seg = s->priv_data;
151 ret = avformat_alloc_output_context2(&seg->avf, seg->oformat, NULL, NULL);
156 oc->interrupt_callback = s->interrupt_callback;
157 oc->max_delay = s->max_delay;
158 av_dict_copy(&oc->metadata, s->metadata, 0);
160 for (i = 0; i < s->nb_streams; i++) {
162 AVCodecContext *icodec, *ocodec;
164 if (!(st = avformat_new_stream(oc, NULL)))
165 return AVERROR(ENOMEM);
166 icodec = s->streams[i]->codec;
168 avcodec_copy_context(ocodec, icodec);
169 if (!oc->oformat->codec_tag ||
170 av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == ocodec->codec_id ||
171 av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0) {
172 ocodec->codec_tag = icodec->codec_tag;
174 ocodec->codec_tag = 0;
176 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
177 st->time_base = s->streams[i]->time_base;
178 av_dict_copy(&st->metadata, s->streams[i]->metadata, 0);
184 static int set_segment_filename(AVFormatContext *s)
186 SegmentContext *seg = s->priv_data;
187 AVFormatContext *oc = seg->avf;
191 if (seg->segment_idx_wrap)
192 seg->segment_idx %= seg->segment_idx_wrap;
193 if (seg->use_strftime) {
195 struct tm *tm, tmpbuf;
197 tm = localtime_r(&now0, &tmpbuf);
198 if (!strftime(oc->filename, sizeof(oc->filename), s->filename, tm)) {
199 av_log(oc, AV_LOG_ERROR, "Could not get segment filename with strftime\n");
200 return AVERROR(EINVAL);
202 } else if (av_get_frame_filename(oc->filename, sizeof(oc->filename),
203 s->filename, seg->segment_idx) < 0) {
204 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", s->filename);
205 return AVERROR(EINVAL);
208 /* copy modified name in list entry */
209 size = strlen(av_basename(oc->filename)) + 1;
210 if (seg->entry_prefix)
211 size += strlen(seg->entry_prefix);
213 if ((ret = av_reallocp(&seg->cur_entry.filename, size)) < 0)
215 snprintf(seg->cur_entry.filename, size, "%s%s",
216 seg->entry_prefix ? seg->entry_prefix : "",
217 av_basename(oc->filename));
222 static int segment_start(AVFormatContext *s, int write_header)
224 SegmentContext *seg = s->priv_data;
225 AVFormatContext *oc = seg->avf;
229 avformat_free_context(oc);
231 if ((err = segment_mux_init(s)) < 0)
237 if ((seg->segment_idx_wrap) && (seg->segment_idx % seg->segment_idx_wrap == 0))
238 seg->segment_idx_wrap_nb++;
240 if ((err = set_segment_filename(s)) < 0)
243 if ((err = ffio_open_whitelist(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
244 &s->interrupt_callback, NULL, s->protocol_whitelist)) < 0) {
245 av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->filename);
248 if (!seg->individual_header_trailer)
249 oc->pb->seekable = 0;
251 if (oc->oformat->priv_class && oc->priv_data)
252 av_opt_set(oc->priv_data, "mpegts_flags", "+resend_headers", 0);
255 if ((err = avformat_write_header(oc, NULL)) < 0)
259 seg->segment_frame_count = 0;
263 static int segment_list_open(AVFormatContext *s)
265 SegmentContext *seg = s->priv_data;
268 snprintf(seg->temp_list_filename, sizeof(seg->temp_list_filename), seg->use_rename ? "%s.tmp" : "%s", seg->list);
269 ret = ffio_open_whitelist(&seg->list_pb, seg->temp_list_filename, AVIO_FLAG_WRITE,
270 &s->interrupt_callback, NULL, s->protocol_whitelist);
272 av_log(s, AV_LOG_ERROR, "Failed to open segment list '%s'\n", seg->list);
276 if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) {
277 SegmentListEntry *entry;
278 double max_duration = 0;
280 avio_printf(seg->list_pb, "#EXTM3U\n");
281 avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n");
282 avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index);
283 avio_printf(seg->list_pb, "#EXT-X-ALLOW-CACHE:%s\n",
284 seg->list_flags & SEGMENT_LIST_FLAG_CACHE ? "YES" : "NO");
286 av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%d\n",
287 seg->segment_list_entries->index);
289 for (entry = seg->segment_list_entries; entry; entry = entry->next)
290 max_duration = FFMAX(max_duration, entry->end_time - entry->start_time);
291 avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration));
292 } else if (seg->list_type == LIST_TYPE_FFCONCAT) {
293 avio_printf(seg->list_pb, "ffconcat version 1.0\n");
299 static void segment_list_print_entry(AVIOContext *list_ioctx,
301 const SegmentListEntry *list_entry,
306 avio_printf(list_ioctx, "%s\n", list_entry->filename);
310 print_csv_escaped_str(list_ioctx, list_entry->filename);
311 avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time);
314 avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n",
315 list_entry->end_time - list_entry->start_time, list_entry->filename);
317 case LIST_TYPE_FFCONCAT:
320 if (av_escape(&buf, list_entry->filename, NULL, AV_ESCAPE_MODE_AUTO, AV_ESCAPE_FLAG_WHITESPACE) < 0) {
321 av_log(log_ctx, AV_LOG_WARNING,
322 "Error writing list entry '%s' in list file\n", list_entry->filename);
325 avio_printf(list_ioctx, "file %s\n", buf);
330 av_assert0(!"Invalid list type");
334 static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
336 SegmentContext *seg = s->priv_data;
337 AVFormatContext *oc = seg->avf;
340 av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */
342 ret = av_write_trailer(oc);
345 av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n",
349 if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) {
350 SegmentListEntry *entry = av_mallocz(sizeof(*entry));
352 ret = AVERROR(ENOMEM);
356 /* append new element */
357 memcpy(entry, &seg->cur_entry, sizeof(*entry));
358 entry->filename = av_strdup(entry->filename);
359 if (!seg->segment_list_entries)
360 seg->segment_list_entries = seg->segment_list_entries_end = entry;
362 seg->segment_list_entries_end->next = entry;
363 seg->segment_list_entries_end = entry;
365 /* drop first item */
366 if (seg->list_size && seg->segment_count >= seg->list_size) {
367 entry = seg->segment_list_entries;
368 seg->segment_list_entries = seg->segment_list_entries->next;
369 av_freep(&entry->filename);
373 if ((ret = segment_list_open(s)) < 0)
375 for (entry = seg->segment_list_entries; entry; entry = entry->next)
376 segment_list_print_entry(seg->list_pb, seg->list_type, entry, s);
377 if (seg->list_type == LIST_TYPE_M3U8 && is_last)
378 avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n");
379 avio_closep(&seg->list_pb);
381 ff_rename(seg->temp_list_filename, seg->list, s);
383 segment_list_print_entry(seg->list_pb, seg->list_type, &seg->cur_entry, s);
384 avio_flush(seg->list_pb);
388 av_log(s, AV_LOG_VERBOSE, "segment:'%s' count:%d ended\n",
389 seg->avf->filename, seg->segment_count);
390 seg->segment_count++;
393 avio_closep(&oc->pb);
398 static int parse_times(void *log_ctx, int64_t **times, int *nb_times,
399 const char *times_str)
403 char *times_str1 = av_strdup(times_str);
404 char *saveptr = NULL;
407 return AVERROR(ENOMEM);
409 #define FAIL(err) ret = err; goto end
412 for (p = times_str1; *p; p++)
416 *times = av_malloc_array(*nb_times, sizeof(**times));
418 av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n");
419 FAIL(AVERROR(ENOMEM));
423 for (i = 0; i < *nb_times; i++) {
425 char *tstr = av_strtok(p, ",", &saveptr);
428 if (!tstr || !tstr[0]) {
429 av_log(log_ctx, AV_LOG_ERROR, "Empty time specification in times list %s\n",
431 FAIL(AVERROR(EINVAL));
434 ret = av_parse_time(&t, tstr, 1);
436 av_log(log_ctx, AV_LOG_ERROR,
437 "Invalid time duration specification '%s' in times list %s\n", tstr, times_str);
438 FAIL(AVERROR(EINVAL));
442 /* check on monotonicity */
443 if (i && (*times)[i-1] > (*times)[i]) {
444 av_log(log_ctx, AV_LOG_ERROR,
445 "Specified time %f is greater than the following time %f\n",
446 (float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000);
447 FAIL(AVERROR(EINVAL));
456 static int parse_frames(void *log_ctx, int **frames, int *nb_frames,
457 const char *frames_str)
461 char *frames_str1 = av_strdup(frames_str);
462 char *saveptr = NULL;
465 return AVERROR(ENOMEM);
467 #define FAIL(err) ret = err; goto end
470 for (p = frames_str1; *p; p++)
474 *frames = av_malloc_array(*nb_frames, sizeof(**frames));
476 av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced frames array\n");
477 FAIL(AVERROR(ENOMEM));
481 for (i = 0; i < *nb_frames; i++) {
484 char *fstr = av_strtok(p, ",", &saveptr);
488 av_log(log_ctx, AV_LOG_ERROR, "Empty frame specification in frame list %s\n",
490 FAIL(AVERROR(EINVAL));
492 f = strtol(fstr, &tailptr, 10);
493 if (*tailptr || f <= 0 || f >= INT_MAX) {
494 av_log(log_ctx, AV_LOG_ERROR,
495 "Invalid argument '%s', must be a positive integer <= INT64_MAX\n",
497 FAIL(AVERROR(EINVAL));
501 /* check on monotonicity */
502 if (i && (*frames)[i-1] > (*frames)[i]) {
503 av_log(log_ctx, AV_LOG_ERROR,
504 "Specified frame %d is greater than the following frame %d\n",
505 (*frames)[i], (*frames)[i-1]);
506 FAIL(AVERROR(EINVAL));
511 av_free(frames_str1);
515 static int open_null_ctx(AVIOContext **ctx)
517 int buf_size = 32768;
518 uint8_t *buf = av_malloc(buf_size);
520 return AVERROR(ENOMEM);
521 *ctx = avio_alloc_context(buf, buf_size, AVIO_FLAG_WRITE, NULL, NULL, NULL, NULL);
524 return AVERROR(ENOMEM);
529 static void close_null_ctxp(AVIOContext **pb)
531 av_freep(&(*pb)->buffer);
535 static int select_reference_stream(AVFormatContext *s)
537 SegmentContext *seg = s->priv_data;
540 seg->reference_stream_index = -1;
541 if (!strcmp(seg->reference_stream_specifier, "auto")) {
542 /* select first index of type with highest priority */
543 int type_index_map[AVMEDIA_TYPE_NB];
544 static const enum AVMediaType type_priority_list[] = {
547 AVMEDIA_TYPE_SUBTITLE,
549 AVMEDIA_TYPE_ATTACHMENT
551 enum AVMediaType type;
553 for (i = 0; i < AVMEDIA_TYPE_NB; i++)
554 type_index_map[i] = -1;
556 /* select first index for each type */
557 for (i = 0; i < s->nb_streams; i++) {
558 type = s->streams[i]->codec->codec_type;
559 if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1
560 /* ignore attached pictures/cover art streams */
561 && !(s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC))
562 type_index_map[type] = i;
565 for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) {
566 type = type_priority_list[i];
567 if ((seg->reference_stream_index = type_index_map[type]) >= 0)
571 for (i = 0; i < s->nb_streams; i++) {
572 ret = avformat_match_stream_specifier(s, s->streams[i],
573 seg->reference_stream_specifier);
577 seg->reference_stream_index = i;
583 if (seg->reference_stream_index < 0) {
584 av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n",
585 seg->reference_stream_specifier);
586 return AVERROR(EINVAL);
592 static void seg_free_context(SegmentContext *seg)
594 avio_closep(&seg->list_pb);
595 avformat_free_context(seg->avf);
599 static int seg_write_header(AVFormatContext *s)
601 SegmentContext *seg = s->priv_data;
602 AVFormatContext *oc = NULL;
603 AVDictionary *options = NULL;
607 seg->segment_count = 0;
608 if (!seg->write_header_trailer)
609 seg->individual_header_trailer = 0;
611 if (seg->header_filename) {
612 seg->write_header_trailer = 1;
613 seg->individual_header_trailer = 0;
616 if (!!seg->time_str + !!seg->times_str + !!seg->frames_str > 1) {
617 av_log(s, AV_LOG_ERROR,
618 "segment_time, segment_times, and segment_frames options "
619 "are mutually exclusive, select just one of them\n");
620 return AVERROR(EINVAL);
623 if (seg->times_str) {
624 if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0)
626 } else if (seg->frames_str) {
627 if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0)
630 /* set default value if not specified */
632 seg->time_str = av_strdup("2");
633 if ((ret = av_parse_time(&seg->time, seg->time_str, 1)) < 0) {
634 av_log(s, AV_LOG_ERROR,
635 "Invalid time duration specification '%s' for segment_time option\n",
639 if (seg->use_clocktime) {
640 if (seg->time <= 0) {
641 av_log(s, AV_LOG_ERROR, "Invalid negative segment_time with segment_atclocktime option set\n");
642 return AVERROR(EINVAL);
644 seg->clocktime_offset = seg->time - (seg->clocktime_offset % seg->time);
648 if (seg->format_options_str) {
649 ret = av_dict_parse_string(&seg->format_options, seg->format_options_str, "=", ":", 0);
651 av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n",
652 seg->format_options_str);
658 if (seg->list_type == LIST_TYPE_UNDEFINED) {
659 if (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV;
660 else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT;
661 else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8;
662 else if (av_match_ext(seg->list, "ffcat,ffconcat")) seg->list_type = LIST_TYPE_FFCONCAT;
663 else seg->list_type = LIST_TYPE_FLAT;
665 if (!seg->list_size && seg->list_type != LIST_TYPE_M3U8) {
666 if ((ret = segment_list_open(s)) < 0)
669 const char *proto = avio_find_protocol_name(s->filename);
670 seg->use_rename = proto && !strcmp(proto, "file");
673 if (seg->list_type == LIST_TYPE_EXT)
674 av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n");
676 if ((ret = select_reference_stream(s)) < 0)
678 av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n",
679 seg->reference_stream_index,
680 av_get_media_type_string(s->streams[seg->reference_stream_index]->codec->codec_type));
682 seg->oformat = av_guess_format(seg->format, s->filename, NULL);
685 ret = AVERROR_MUXER_NOT_FOUND;
688 if (seg->oformat->flags & AVFMT_NOFILE) {
689 av_log(s, AV_LOG_ERROR, "format %s not supported.\n",
691 ret = AVERROR(EINVAL);
695 if ((ret = segment_mux_init(s)) < 0)
699 if ((ret = set_segment_filename(s)) < 0)
702 if (seg->write_header_trailer) {
703 if ((ret = ffio_open_whitelist(&oc->pb, seg->header_filename ? seg->header_filename : oc->filename, AVIO_FLAG_WRITE,
704 &s->interrupt_callback, NULL, s->protocol_whitelist)) < 0) {
705 av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->filename);
708 if (!seg->individual_header_trailer)
709 oc->pb->seekable = 0;
711 if ((ret = open_null_ctx(&oc->pb)) < 0)
715 av_dict_copy(&options, seg->format_options, 0);
716 ret = avformat_write_header(oc, &options);
717 if (av_dict_count(options)) {
718 av_log(s, AV_LOG_ERROR,
719 "Some of the provided format options in '%s' are not recognized\n", seg->format_options_str);
720 ret = AVERROR(EINVAL);
725 avio_closep(&oc->pb);
728 seg->segment_frame_count = 0;
730 av_assert0(s->nb_streams == oc->nb_streams);
731 for (i = 0; i < s->nb_streams; i++) {
732 AVStream *inner_st = oc->streams[i];
733 AVStream *outer_st = s->streams[i];
734 avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
737 if (oc->avoid_negative_ts > 0 && s->avoid_negative_ts < 0)
738 s->avoid_negative_ts = 1;
740 if (!seg->write_header_trailer || seg->header_filename) {
741 if (seg->header_filename) {
742 av_write_frame(oc, NULL);
743 avio_closep(&oc->pb);
745 close_null_ctxp(&oc->pb);
747 if ((ret = ffio_open_whitelist(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
748 &s->interrupt_callback, NULL, s->protocol_whitelist)) < 0)
750 if (!seg->individual_header_trailer)
751 oc->pb->seekable = 0;
755 av_dict_free(&options);
757 seg_free_context(seg);
762 static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
764 SegmentContext *seg = s->priv_data;
765 AVStream *st = s->streams[pkt->stream_index];
766 int64_t end_pts = INT64_MAX, offset;
767 int start_frame = INT_MAX;
774 return AVERROR(EINVAL);
777 end_pts = seg->segment_count < seg->nb_times ?
778 seg->times[seg->segment_count] : INT64_MAX;
779 } else if (seg->frames) {
780 start_frame = seg->segment_count < seg->nb_frames ?
781 seg->frames[seg->segment_count] : INT_MAX;
783 if (seg->use_clocktime) {
784 int64_t avgt = av_gettime();
785 time_t sec = avgt / 1000000;
786 localtime_r(&sec, &ti);
787 usecs = (int64_t)(ti.tm_hour * 3600 + ti.tm_min * 60 + ti.tm_sec) * 1000000 + (avgt % 1000000);
788 wrapped_val = (usecs + seg->clocktime_offset) % seg->time;
789 if (seg->last_cut != usecs && wrapped_val < seg->last_val && wrapped_val < seg->clocktime_wrap_duration) {
790 seg->cut_pending = 1;
791 seg->last_cut = usecs;
793 seg->last_val = wrapped_val;
795 end_pts = seg->time * (seg->segment_count + 1);
799 ff_dlog(s, "packet stream:%d pts:%s pts_time:%s duration_time:%s is_key:%d frame:%d\n",
800 pkt->stream_index, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
801 av_ts2timestr(pkt->duration, &st->time_base),
802 pkt->flags & AV_PKT_FLAG_KEY,
803 pkt->stream_index == seg->reference_stream_index ? seg->frame_count : -1);
805 if (pkt->stream_index == seg->reference_stream_index &&
806 (pkt->flags & AV_PKT_FLAG_KEY || seg->break_non_keyframes) &&
807 seg->segment_frame_count > 0 &&
808 (seg->cut_pending || seg->frame_count >= start_frame ||
809 (pkt->pts != AV_NOPTS_VALUE &&
810 av_compare_ts(pkt->pts, st->time_base,
811 end_pts-seg->time_delta, AV_TIME_BASE_Q) >= 0))) {
812 /* sanitize end time in case last packet didn't have a defined duration */
813 if (seg->cur_entry.last_duration == 0)
814 seg->cur_entry.end_time = (double)pkt->pts * av_q2d(st->time_base);
816 if ((ret = segment_end(s, seg->individual_header_trailer, 0)) < 0)
819 if ((ret = segment_start(s, seg->individual_header_trailer)) < 0)
822 seg->cut_pending = 0;
823 seg->cur_entry.index = seg->segment_idx + seg->segment_idx_wrap * seg->segment_idx_wrap_nb;
824 seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base);
825 seg->cur_entry.start_pts = av_rescale_q(pkt->pts, st->time_base, AV_TIME_BASE_Q);
826 seg->cur_entry.end_time = seg->cur_entry.start_time +
827 pkt->pts != AV_NOPTS_VALUE ? (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base) : 0;
828 } else if (pkt->pts != AV_NOPTS_VALUE && pkt->stream_index == seg->reference_stream_index) {
829 seg->cur_entry.end_time =
830 FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base));
831 seg->cur_entry.last_duration = pkt->duration;
834 if (seg->segment_frame_count == 0) {
835 av_log(s, AV_LOG_VERBOSE, "segment:'%s' starts with packet stream:%d pts:%s pts_time:%s frame:%d\n",
836 seg->avf->filename, pkt->stream_index,
837 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), seg->frame_count);
840 av_log(s, AV_LOG_DEBUG, "stream:%d start_pts_time:%s pts:%s pts_time:%s dts:%s dts_time:%s",
842 av_ts2timestr(seg->cur_entry.start_pts, &AV_TIME_BASE_Q),
843 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
844 av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
846 /* compute new timestamps */
847 offset = av_rescale_q(seg->initial_offset - (seg->reset_timestamps ? seg->cur_entry.start_pts : 0),
848 AV_TIME_BASE_Q, st->time_base);
849 if (pkt->pts != AV_NOPTS_VALUE)
851 if (pkt->dts != AV_NOPTS_VALUE)
854 av_log(s, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
855 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
856 av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
858 ret = ff_write_chained(seg->avf, pkt->stream_index, pkt, s, seg->initial_offset || seg->reset_timestamps);
861 if (pkt->stream_index == seg->reference_stream_index) {
863 seg->segment_frame_count++;
867 seg_free_context(seg);
872 static int seg_write_trailer(struct AVFormatContext *s)
874 SegmentContext *seg = s->priv_data;
875 AVFormatContext *oc = seg->avf;
876 SegmentListEntry *cur, *next;
882 if (!seg->write_header_trailer) {
883 if ((ret = segment_end(s, 0, 1)) < 0)
885 if ((ret = open_null_ctx(&oc->pb)) < 0)
887 ret = av_write_trailer(oc);
888 close_null_ctxp(&oc->pb);
890 ret = segment_end(s, 1, 1);
894 avio_closep(&seg->list_pb);
896 av_dict_free(&seg->format_options);
898 av_freep(&seg->times);
899 av_freep(&seg->frames);
900 av_freep(&seg->cur_entry.filename);
902 cur = seg->segment_list_entries;
905 av_freep(&cur->filename);
910 avformat_free_context(oc);
915 #define OFFSET(x) offsetof(SegmentContext, x)
916 #define E AV_OPT_FLAG_ENCODING_PARAM
917 static const AVOption options[] = {
918 { "reference_stream", "set reference stream", OFFSET(reference_stream_specifier), AV_OPT_TYPE_STRING, {.str = "auto"}, CHAR_MIN, CHAR_MAX, E },
919 { "segment_format", "set container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
920 { "segment_format_options", "set list of options for the container format used for the segments", OFFSET(format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
921 { "segment_list", "set the segment list filename", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
922 { "segment_header_filename", "write a single file containing the header", OFFSET(header_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
924 { "segment_list_flags","set flags affecting segment list generation", OFFSET(list_flags), AV_OPT_TYPE_FLAGS, {.i64 = SEGMENT_LIST_FLAG_CACHE }, 0, UINT_MAX, E, "list_flags"},
925 { "cache", "allow list caching", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX, E, "list_flags"},
926 { "live", "enable live-friendly list generation (useful for HLS)", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_LIVE }, INT_MIN, INT_MAX, E, "list_flags"},
928 { "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
930 { "segment_list_type", "set the segment list type", OFFSET(list_type), AV_OPT_TYPE_INT, {.i64 = LIST_TYPE_UNDEFINED}, -1, LIST_TYPE_NB-1, E, "list_type" },
931 { "flat", "flat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, E, "list_type" },
932 { "csv", "csv format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV }, INT_MIN, INT_MAX, E, "list_type" },
933 { "ext", "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT }, INT_MIN, INT_MAX, E, "list_type" },
934 { "ffconcat", "ffconcat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FFCONCAT }, INT_MIN, INT_MAX, E, "list_type" },
935 { "m3u8", "M3U8 format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
936 { "hls", "Apple HTTP Live Streaming compatible", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
938 { "segment_atclocktime", "set segment to be cut at clocktime", OFFSET(use_clocktime), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E},
939 { "segment_clocktime_offset", "set segment clocktime offset", OFFSET(clocktime_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 86400000000LL, E},
940 { "segment_clocktime_wrap_duration", "set segment clocktime wrapping duration", OFFSET(clocktime_wrap_duration), AV_OPT_TYPE_DURATION, {.i64 = INT64_MAX}, 0, INT64_MAX, E},
941 { "segment_time", "set segment duration", OFFSET(time_str),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
942 { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 0, E },
943 { "segment_times", "set segment split time points", OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
944 { "segment_frames", "set segment split frame numbers", OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
945 { "segment_wrap", "set number after which the index wraps", OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
946 { "segment_list_entry_prefix", "set base url prefix for segments", OFFSET(entry_prefix), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
947 { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
948 { "segment_wrap_number", "set the number of wrap before the first segment", OFFSET(segment_idx_wrap_nb), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
949 { "strftime", "set filename expansion with strftime at segment creation", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
950 { "break_non_keyframes", "allow breaking segments on non-keyframes", OFFSET(break_non_keyframes), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
952 { "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E },
953 { "write_header_trailer", "write a header to the first segment and a trailer to the last one", OFFSET(write_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E },
954 { "reset_timestamps", "reset timestamps at the begin of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
955 { "initial_offset", "set initial timestamp offset", OFFSET(initial_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E },
959 static const AVClass seg_class = {
960 .class_name = "segment muxer",
961 .item_name = av_default_item_name,
963 .version = LIBAVUTIL_VERSION_INT,
966 AVOutputFormat ff_segment_muxer = {
968 .long_name = NULL_IF_CONFIG_SMALL("segment"),
969 .priv_data_size = sizeof(SegmentContext),
970 .flags = AVFMT_NOFILE|AVFMT_GLOBALHEADER,
971 .write_header = seg_write_header,
972 .write_packet = seg_write_packet,
973 .write_trailer = seg_write_trailer,
974 .priv_class = &seg_class,
977 static const AVClass sseg_class = {
978 .class_name = "stream_segment muxer",
979 .item_name = av_default_item_name,
981 .version = LIBAVUTIL_VERSION_INT,
984 AVOutputFormat ff_stream_segment_muxer = {
985 .name = "stream_segment,ssegment",
986 .long_name = NULL_IF_CONFIG_SMALL("streaming segment muxer"),
987 .priv_data_size = sizeof(SegmentContext),
988 .flags = AVFMT_NOFILE,
989 .write_header = seg_write_header,
990 .write_packet = seg_write_packet,
991 .write_trailer = seg_write_trailer,
992 .priv_class = &sseg_class,