2 * MPEG-DASH ISO BMFF segmenter
3 * Copyright (c) 2014 Martin Storsjo
4 * Copyright (c) 2018 Akamai Technologies, Inc.
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "libavutil/avassert.h"
29 #include "libavutil/avutil.h"
30 #include "libavutil/avstring.h"
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/mathematics.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/rational.h"
35 #include "libavutil/time.h"
36 #include "libavutil/time_internal.h"
40 #include "avio_internal.h"
41 #include "hlsplaylist.h"
42 #if CONFIG_HTTP_PROTOCOL
47 #include "os_support.h"
53 SEGMENT_TYPE_AUTO = 0,
59 typedef struct Segment {
62 int range_length, index_length;
64 double prog_date_time;
69 typedef struct AdaptationSet {
71 enum AVMediaType media_type;
72 AVDictionary *metadata;
73 AVRational min_frame_rate, max_frame_rate;
74 int ambiguous_frame_rate;
77 typedef struct OutputStream {
79 int ctx_inited, as_idx;
83 int64_t init_start_pos, pos;
84 int init_range_length;
85 int nb_segments, segments_size, segment_index;
87 int64_t first_pts, start_pts, max_pts;
88 int64_t last_dts, last_pts;
90 SegmentType segment_type; /* segment type selected for this particular stream */
91 const char *format_name;
92 const char *single_file_name; /* file names selected for this particular stream */
93 const char *init_seg_name;
94 const char *media_seg_name;
100 char temp_path[1024];
101 double availability_time_offset;
106 typedef struct DASHContext {
107 const AVClass *class; /* Class for private options. */
108 char *adaptation_sets;
112 int extra_window_size;
113 #if FF_API_DASH_MIN_SEG_DURATION
114 int min_seg_duration;
116 int64_t seg_duration;
121 OutputStream *streams;
123 int64_t last_duration;
124 int64_t total_duration;
125 char availability_start_time[100];
128 const char *single_file_name; /* file names as specified in options */
129 const char *init_seg_name;
130 const char *media_seg_name;
131 const char *utc_timing_url;
133 const char *user_agent;
136 int master_playlist_created;
137 AVIOContext *mpd_out;
138 AVIOContext *m3u8_out;
141 int index_correction;
142 char *format_options_str;
144 SegmentType segment_type_option; /* segment type as specified in options */
145 int ignore_io_errors;
147 int master_publish_rate;
148 int nr_of_streams_to_flush;
149 int nr_of_streams_flushed;
152 static struct codec_string {
156 { AV_CODEC_ID_VP8, "vp8" },
157 { AV_CODEC_ID_VP9, "vp9" },
158 { AV_CODEC_ID_VORBIS, "vorbis" },
159 { AV_CODEC_ID_OPUS, "opus" },
160 { AV_CODEC_ID_FLAC, "flac" },
164 static struct format_string {
165 SegmentType segment_type;
168 { SEGMENT_TYPE_AUTO, "auto" },
169 { SEGMENT_TYPE_MP4, "mp4" },
170 { SEGMENT_TYPE_WEBM, "webm" },
174 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
175 AVDictionary **options) {
176 DASHContext *c = s->priv_data;
177 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
178 int err = AVERROR_MUXER_NOT_FOUND;
179 if (!*pb || !http_base_proto || !c->http_persistent) {
180 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
181 #if CONFIG_HTTP_PROTOCOL
183 URLContext *http_url_context = ffio_geturlcontext(*pb);
184 av_assert0(http_url_context);
185 err = ff_http_do_new_request(http_url_context, filename);
187 ff_format_io_close(s, pb);
193 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
194 DASHContext *c = s->priv_data;
195 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
200 if (!http_base_proto || !c->http_persistent) {
201 ff_format_io_close(s, pb);
202 #if CONFIG_HTTP_PROTOCOL
204 URLContext *http_url_context = ffio_geturlcontext(*pb);
205 av_assert0(http_url_context);
207 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
212 static const char *get_format_str(SegmentType segment_type) {
214 for (i = 0; i < SEGMENT_TYPE_NB; i++)
215 if (formats[i].segment_type == segment_type)
216 return formats[i].str;
220 static int handle_io_open_error(AVFormatContext *s, int err, char *url) {
221 DASHContext *c = s->priv_data;
222 char errbuf[AV_ERROR_MAX_STRING_SIZE];
223 av_strerror(err, errbuf, sizeof(errbuf));
224 av_log(s, c->ignore_io_errors ? AV_LOG_WARNING : AV_LOG_ERROR,
225 "Unable to open %s for writing: %s\n", url, errbuf);
226 return c->ignore_io_errors ? 0 : err;
229 static inline SegmentType select_segment_type(SegmentType segment_type, enum AVCodecID codec_id)
231 if (segment_type == SEGMENT_TYPE_AUTO) {
232 if (codec_id == AV_CODEC_ID_OPUS || codec_id == AV_CODEC_ID_VORBIS ||
233 codec_id == AV_CODEC_ID_VP8 || codec_id == AV_CODEC_ID_VP9) {
234 segment_type = SEGMENT_TYPE_WEBM;
236 segment_type = SEGMENT_TYPE_MP4;
243 static int init_segment_types(AVFormatContext *s)
245 DASHContext *c = s->priv_data;
246 int has_mp4_streams = 0;
247 for (int i = 0; i < s->nb_streams; ++i) {
248 OutputStream *os = &c->streams[i];
249 SegmentType segment_type = select_segment_type(
250 c->segment_type_option, s->streams[i]->codecpar->codec_id);
251 os->segment_type = segment_type;
252 os->format_name = get_format_str(segment_type);
253 if (!os->format_name) {
254 av_log(s, AV_LOG_ERROR, "Could not select DASH segment type for stream %d\n", i);
255 return AVERROR_MUXER_NOT_FOUND;
257 has_mp4_streams |= segment_type == SEGMENT_TYPE_MP4;
260 if (c->hls_playlist && !has_mp4_streams) {
261 av_log(s, AV_LOG_WARNING, "No mp4 streams, disabling HLS manifest generation\n");
268 static int check_file_extension(const char *filename, const char *extension) {
270 if (!filename || !extension)
272 dot = strrchr(filename, '.');
273 if (dot && !strcmp(dot + 1, extension))
278 static void set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par,
279 AVRational *frame_rate, char *str, int size) {
281 int ret = ff_isom_get_vpcc_features(s, par, frame_rate, &vpcc);
283 av_strlcatf(str, size, "vp09.%02d.%02d.%02d",
284 vpcc.profile, vpcc.level, vpcc.bitdepth);
286 // Default to just vp9 in case of error while finding out profile or level
287 av_log(s, AV_LOG_WARNING, "Could not find VP9 profile and/or level\n");
288 av_strlcpy(str, "vp9", size);
293 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
294 AVRational *frame_rate, char *str, int size)
296 const AVCodecTag *tags[2] = { NULL, NULL };
300 // common Webm codecs are not part of RFC 6381
301 for (i = 0; codecs[i].id; i++)
302 if (codecs[i].id == par->codec_id) {
303 if (codecs[i].id == AV_CODEC_ID_VP9) {
304 set_vp9_codec_str(s, par, frame_rate, str, size);
306 av_strlcpy(str, codecs[i].str, size);
311 // for codecs part of RFC 6381
312 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
313 tags[0] = ff_codec_movvideo_tags;
314 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
315 tags[0] = ff_codec_movaudio_tags;
319 tag = par->codec_tag;
321 tag = av_codec_get_tag(tags, par->codec_id);
329 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
331 tags[0] = ff_mp4_obj_type;
332 oti = av_codec_get_tag(tags, par->codec_id);
334 av_strlcatf(str, size, ".%02"PRIx32, oti);
338 if (tag == MKTAG('m', 'p', '4', 'a')) {
339 if (par->extradata_size >= 2) {
340 int aot = par->extradata[0] >> 3;
342 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
343 av_strlcatf(str, size, ".%d", aot);
345 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
346 // Unimplemented, should output ProfileLevelIndication as a decimal number
347 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
349 } else if (!strcmp(str, "avc1")) {
350 uint8_t *tmpbuf = NULL;
351 uint8_t *extradata = par->extradata;
352 int extradata_size = par->extradata_size;
355 if (extradata[0] != 1) {
357 if (avio_open_dyn_buf(&pb) < 0)
359 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
360 ffio_free_dyn_buf(&pb);
363 extradata_size = avio_close_dyn_buf(pb, &extradata);
367 if (extradata_size >= 4)
368 av_strlcatf(str, size, ".%02x%02x%02x",
369 extradata[1], extradata[2], extradata[3]);
374 static int flush_dynbuf(DASHContext *c, OutputStream *os, int *range_length)
379 return AVERROR(EINVAL);
383 av_write_frame(os->ctx, NULL);
384 avio_flush(os->ctx->pb);
386 if (!c->single_file) {
388 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
391 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
396 return avio_open_dyn_buf(&os->ctx->pb);
398 *range_length = avio_tell(os->ctx->pb) - os->pos;
403 static void set_http_options(AVDictionary **options, DASHContext *c)
406 av_dict_set(options, "method", c->method, 0);
408 av_dict_set(options, "user_agent", c->user_agent, 0);
409 if (c->http_persistent)
410 av_dict_set_int(options, "multiple_requests", 1, 0);
412 av_dict_set_int(options, "timeout", c->timeout, 0);
415 static void get_hls_playlist_name(char *playlist_name, int string_size,
416 const char *base_url, int id) {
418 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
420 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
423 static void get_start_index_number(OutputStream *os, DASHContext *c,
424 int *start_index, int *start_number) {
427 if (c->window_size) {
428 *start_index = FFMAX(os->nb_segments - c->window_size, 0);
429 *start_number = FFMAX(os->segment_index - c->window_size, 1);
433 static void write_hls_media_playlist(OutputStream *os, AVFormatContext *s,
434 int representation_id, int final,
435 char *prefetch_url) {
436 DASHContext *c = s->priv_data;
437 int timescale = os->ctx->streams[0]->time_base.den;
438 char temp_filename_hls[1024];
439 char filename_hls[1024];
440 AVDictionary *http_opts = NULL;
441 int target_duration = 0;
443 const char *proto = avio_find_protocol_name(c->dirname);
444 int use_rename = proto && !strcmp(proto, "file");
445 int i, start_index, start_number;
446 double prog_date_time = 0;
448 get_start_index_number(os, c, &start_index, &start_number);
450 if (!c->hls_playlist || start_index >= os->nb_segments ||
451 os->segment_type != SEGMENT_TYPE_MP4)
454 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
455 c->dirname, representation_id);
457 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
459 set_http_options(&http_opts, c);
460 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
461 av_dict_free(&http_opts);
463 handle_io_open_error(s, ret, temp_filename_hls);
466 for (i = start_index; i < os->nb_segments; i++) {
467 Segment *seg = os->segments[i];
468 double duration = (double) seg->duration / timescale;
469 if (target_duration <= duration)
470 target_duration = lrint(duration);
473 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
474 start_number, PLAYLIST_TYPE_NONE);
476 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
477 os->init_range_length, os->init_start_pos);
479 for (i = start_index; i < os->nb_segments; i++) {
480 Segment *seg = os->segments[i];
482 if (prog_date_time == 0) {
483 if (os->nb_segments == 1)
484 prog_date_time = c->start_time_s;
486 prog_date_time = seg->prog_date_time;
488 seg->prog_date_time = prog_date_time;
490 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
491 (double) seg->duration / timescale, 0,
492 seg->range_length, seg->start_pos, NULL,
493 c->single_file ? os->initfile : seg->file,
496 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
501 avio_printf(c->m3u8_out, "#EXT-X-PREFETCH:%s\n", prefetch_url);
504 ff_hls_write_end_list(c->m3u8_out);
506 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
509 if (avpriv_io_move(temp_filename_hls, filename_hls) < 0) {
510 av_log(os->ctx, AV_LOG_WARNING, "renaming file %s to %s failed\n\n", temp_filename_hls, filename_hls);
514 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
516 DASHContext *c = s->priv_data;
517 int ret, range_length;
519 ret = flush_dynbuf(c, os, &range_length);
523 os->pos = os->init_range_length = range_length;
524 if (!c->single_file) {
526 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
527 dashenc_io_close(s, &os->out, filename);
532 static void dash_free(AVFormatContext *s)
534 DASHContext *c = s->priv_data;
538 for (i = 0; i < c->nb_as; i++)
539 av_dict_free(&c->as[i].metadata);
546 for (i = 0; i < s->nb_streams; i++) {
547 OutputStream *os = &c->streams[i];
548 if (os->ctx && os->ctx->pb) {
550 ffio_free_dyn_buf(&os->ctx->pb);
552 avio_close(os->ctx->pb);
554 ff_format_io_close(s, &os->out);
556 avformat_free_context(os->ctx);
557 for (j = 0; j < os->nb_segments; j++)
558 av_free(os->segments[j]);
559 av_free(os->segments);
560 av_freep(&os->single_file_name);
561 av_freep(&os->init_seg_name);
562 av_freep(&os->media_seg_name);
564 av_freep(&c->streams);
566 ff_format_io_close(s, &c->mpd_out);
567 ff_format_io_close(s, &c->m3u8_out);
570 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
571 int representation_id, int final)
573 DASHContext *c = s->priv_data;
574 int i, start_index, start_number;
575 get_start_index_number(os, c, &start_index, &start_number);
577 if (c->use_template) {
578 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
579 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
580 if (!c->use_timeline) {
581 avio_printf(out, "duration=\"%"PRId64"\" ", c->seg_duration);
582 if (c->streaming && os->availability_time_offset)
583 avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
584 os->availability_time_offset);
586 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", os->init_seg_name, os->media_seg_name, c->use_timeline ? start_number : 1);
587 if (c->use_timeline) {
588 int64_t cur_time = 0;
589 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
590 for (i = start_index; i < os->nb_segments; ) {
591 Segment *seg = os->segments[i];
593 avio_printf(out, "\t\t\t\t\t\t<S ");
594 if (i == start_index || seg->time != cur_time) {
595 cur_time = seg->time;
596 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
598 avio_printf(out, "d=\"%"PRId64"\" ", seg->duration);
599 while (i + repeat + 1 < os->nb_segments &&
600 os->segments[i + repeat + 1]->duration == seg->duration &&
601 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
604 avio_printf(out, "r=\"%d\" ", repeat);
605 avio_printf(out, "/>\n");
607 cur_time += (1 + repeat) * seg->duration;
609 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
611 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
612 } else if (c->single_file) {
613 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
614 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
615 avio_printf(out, "\t\t\t\t\t<Initialization range=\"%"PRId64"-%"PRId64"\" />\n", os->init_start_pos, os->init_start_pos + os->init_range_length - 1);
616 for (i = start_index; i < os->nb_segments; i++) {
617 Segment *seg = os->segments[i];
618 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
619 if (seg->index_length)
620 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
621 avio_printf(out, "/>\n");
623 avio_printf(out, "\t\t\t\t</SegmentList>\n");
625 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
626 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
627 for (i = start_index; i < os->nb_segments; i++) {
628 Segment *seg = os->segments[i];
629 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
631 avio_printf(out, "\t\t\t\t</SegmentList>\n");
633 if (!c->lhls || final) {
634 write_hls_media_playlist(os, s, representation_id, final, NULL);
639 static char *xmlescape(const char *str) {
640 int outlen = strlen(str)*3/2 + 6;
641 char *out = av_realloc(NULL, outlen + 1);
645 for (; *str; str++) {
646 if (pos + 6 > outlen) {
648 outlen = 2 * outlen + 6;
649 tmp = av_realloc(out, outlen + 1);
657 memcpy(&out[pos], "&", 5);
659 } else if (*str == '<') {
660 memcpy(&out[pos], "<", 4);
662 } else if (*str == '>') {
663 memcpy(&out[pos], ">", 4);
665 } else if (*str == '\'') {
666 memcpy(&out[pos], "'", 6);
668 } else if (*str == '\"') {
669 memcpy(&out[pos], """, 6);
679 static void write_time(AVIOContext *out, int64_t time)
681 int seconds = time / AV_TIME_BASE;
682 int fractions = time % AV_TIME_BASE;
683 int minutes = seconds / 60;
684 int hours = minutes / 60;
687 avio_printf(out, "PT");
689 avio_printf(out, "%dH", hours);
690 if (hours || minutes)
691 avio_printf(out, "%dM", minutes);
692 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
695 static void format_date_now(char *buf, int size)
697 struct tm *ptm, tmbuf;
698 int64_t time_us = av_gettime();
699 int64_t time_ms = time_us / 1000;
700 const time_t time_s = time_ms / 1000;
701 int millisec = time_ms - (time_s * 1000);
702 ptm = gmtime_r(&time_s, &tmbuf);
705 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%S", ptm)) {
710 snprintf(buf + len, size - len, ".%03dZ", millisec);
714 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
717 DASHContext *c = s->priv_data;
718 AdaptationSet *as = &c->as[as_index];
719 AVDictionaryEntry *lang, *role;
722 avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
723 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
724 if (as->media_type == AVMEDIA_TYPE_VIDEO && as->max_frame_rate.num && !as->ambiguous_frame_rate && av_cmp_q(as->min_frame_rate, as->max_frame_rate) < 0)
725 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
726 lang = av_dict_get(as->metadata, "language", NULL, 0);
728 avio_printf(out, " lang=\"%s\"", lang->value);
729 avio_printf(out, ">\n");
731 role = av_dict_get(as->metadata, "role", NULL, 0);
733 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
735 for (i = 0; i < s->nb_streams; i++) {
736 OutputStream *os = &c->streams[i];
737 char bandwidth_str[64] = {'\0'};
739 if (os->as_idx - 1 != as_index)
742 if (os->bit_rate > 0)
743 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"",
746 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
747 AVStream *st = s->streams[i];
748 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
749 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
750 if (st->avg_frame_rate.num)
751 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
752 avio_printf(out, ">\n");
754 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
755 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
756 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
757 s->streams[i]->codecpar->channels);
759 output_segment_list(os, out, s, i, final);
760 avio_printf(out, "\t\t\t</Representation>\n");
762 avio_printf(out, "\t\t</AdaptationSet>\n");
767 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
769 DASHContext *c = s->priv_data;
771 void *mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
773 return AVERROR(ENOMEM);
777 *as = &c->as[c->nb_as - 1];
778 memset(*as, 0, sizeof(**as));
779 (*as)->media_type = type;
784 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
786 DASHContext *c = s->priv_data;
787 AdaptationSet *as = &c->as[as_idx - 1];
788 OutputStream *os = &c->streams[i];
790 if (as->media_type != s->streams[i]->codecpar->codec_type) {
791 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
792 return AVERROR(EINVAL);
793 } else if (os->as_idx) {
794 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
795 return AVERROR(EINVAL);
802 static int parse_adaptation_sets(AVFormatContext *s)
804 DASHContext *c = s->priv_data;
805 const char *p = c->adaptation_sets;
806 enum { new_set, parse_id, parsing_streams } state;
810 // default: one AdaptationSet for each stream
812 for (i = 0; i < s->nb_streams; i++) {
813 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
815 snprintf(as->id, sizeof(as->id), "%d", i);
817 c->streams[i].as_idx = c->nb_as;
822 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
828 } else if (state == new_set && av_strstart(p, "id=", &p)) {
830 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
834 snprintf(as->id, sizeof(as->id), "%.*s", n, p);
840 } else if (state == parse_id && av_strstart(p, "streams=", &p)) {
841 state = parsing_streams;
842 } else if (state == parsing_streams) {
843 AdaptationSet *as = &c->as[c->nb_as - 1];
844 char idx_str[8], *end_str;
846 n = strcspn(p, " ,");
847 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
850 // if value is "a" or "v", map all streams of that type
851 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
852 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
853 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
855 for (i = 0; i < s->nb_streams; i++) {
856 if (s->streams[i]->codecpar->codec_type != type)
859 as->media_type = s->streams[i]->codecpar->codec_type;
861 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
864 } else { // select single stream
865 i = strtol(idx_str, &end_str, 10);
866 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
867 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
868 return AVERROR(EINVAL);
870 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
872 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
873 as->media_type = s->streams[i]->codecpar->codec_type;
876 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
885 return AVERROR(EINVAL);
890 // check for unassigned streams
891 for (i = 0; i < s->nb_streams; i++) {
892 OutputStream *os = &c->streams[i];
894 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
895 return AVERROR(EINVAL);
901 static int write_manifest(AVFormatContext *s, int final)
903 DASHContext *c = s->priv_data;
905 char temp_filename[1024];
907 const char *proto = avio_find_protocol_name(s->url);
908 int use_rename = proto && !strcmp(proto, "file");
909 static unsigned int warned_non_file = 0;
910 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
911 AVDictionary *opts = NULL;
913 if (!use_rename && !warned_non_file++)
914 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
916 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
917 set_http_options(&opts, c);
918 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
921 return handle_io_open_error(s, ret, temp_filename);
924 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
925 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
926 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
927 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
928 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
929 "\tprofiles=\"urn:mpeg:dash:profile:isoff-live:2011\"\n"
930 "\ttype=\"%s\"\n", final ? "static" : "dynamic");
932 avio_printf(out, "\tmediaPresentationDuration=\"");
933 write_time(out, c->total_duration);
934 avio_printf(out, "\"\n");
936 int64_t update_period = c->last_duration / AV_TIME_BASE;
938 if (c->use_template && !c->use_timeline)
940 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
941 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
942 if (c->availability_start_time[0])
943 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
944 format_date_now(now_str, sizeof(now_str));
946 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
947 if (c->window_size && c->use_template) {
948 avio_printf(out, "\ttimeShiftBufferDepth=\"");
949 write_time(out, c->last_duration * c->window_size);
950 avio_printf(out, "\"\n");
953 avio_printf(out, "\tminBufferTime=\"");
954 write_time(out, c->last_duration * 2);
955 avio_printf(out, "\">\n");
956 avio_printf(out, "\t<ProgramInformation>\n");
958 char *escaped = xmlescape(title->value);
959 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
962 avio_printf(out, "\t</ProgramInformation>\n");
964 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
965 OutputStream *os = &c->streams[0];
966 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
967 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
968 avio_printf(out, "\t<Period id=\"0\" start=\"");
969 write_time(out, start_time);
970 avio_printf(out, "\">\n");
972 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
975 for (i = 0; i < c->nb_as; i++) {
976 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
979 avio_printf(out, "\t</Period>\n");
981 if (c->utc_timing_url)
982 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
984 avio_printf(out, "</MPD>\n");
986 dashenc_io_close(s, &c->mpd_out, temp_filename);
989 if ((ret = avpriv_io_move(temp_filename, s->url)) < 0)
993 if (c->hls_playlist) {
994 char filename_hls[1024];
995 const char *audio_group = "A1";
996 char audio_codec_str[128] = "\0";
998 int max_audio_bitrate = 0;
1000 // Publish master playlist only the configured rate
1001 if (c->master_playlist_created && (!c->master_publish_rate ||
1002 c->streams[0].segment_index % c->master_publish_rate))
1006 snprintf(filename_hls, sizeof(filename_hls), "%smaster.m3u8", c->dirname);
1008 snprintf(filename_hls, sizeof(filename_hls), "master.m3u8");
1010 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
1012 set_http_options(&opts, c);
1013 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename, &opts);
1014 av_dict_free(&opts);
1016 return handle_io_open_error(s, ret, temp_filename);
1019 ff_hls_write_playlist_version(c->m3u8_out, 7);
1021 for (i = 0; i < s->nb_streams; i++) {
1022 char playlist_file[64];
1023 AVStream *st = s->streams[i];
1024 OutputStream *os = &c->streams[i];
1025 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1027 if (os->segment_type != SEGMENT_TYPE_MP4)
1029 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1030 ff_hls_write_audio_rendition(c->m3u8_out, (char *)audio_group,
1031 playlist_file, NULL, i, is_default);
1032 max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
1033 os->muxer_overhead, max_audio_bitrate);
1034 if (!av_strnstr(audio_codec_str, os->codec_str, sizeof(audio_codec_str))) {
1035 if (strlen(audio_codec_str))
1036 av_strlcat(audio_codec_str, ",", sizeof(audio_codec_str));
1037 av_strlcat(audio_codec_str, os->codec_str, sizeof(audio_codec_str));
1042 for (i = 0; i < s->nb_streams; i++) {
1043 char playlist_file[64];
1044 char codec_str[128];
1045 AVStream *st = s->streams[i];
1046 OutputStream *os = &c->streams[i];
1047 char *agroup = NULL;
1048 char *codec_str_ptr = NULL;
1049 int stream_bitrate = st->codecpar->bit_rate + os->muxer_overhead;
1050 if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1052 if (os->segment_type != SEGMENT_TYPE_MP4)
1054 av_strlcpy(codec_str, os->codec_str, sizeof(codec_str));
1055 if (max_audio_bitrate) {
1056 agroup = (char *)audio_group;
1057 stream_bitrate += max_audio_bitrate;
1058 av_strlcat(codec_str, ",", sizeof(codec_str));
1059 av_strlcat(codec_str, audio_codec_str, sizeof(codec_str));
1061 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC) {
1062 codec_str_ptr = codec_str;
1064 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1065 ff_hls_write_stream_info(st, c->m3u8_out, stream_bitrate,
1066 playlist_file, agroup,
1067 codec_str_ptr, NULL);
1069 dashenc_io_close(s, &c->m3u8_out, temp_filename);
1071 if ((ret = avpriv_io_move(temp_filename, filename_hls)) < 0)
1073 c->master_playlist_created = 1;
1079 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
1081 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
1083 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
1087 static int dash_init(AVFormatContext *s)
1089 DASHContext *c = s->priv_data;
1092 char basename[1024];
1094 c->nr_of_streams_to_flush = 0;
1095 if (c->single_file_name)
1098 c->use_template = 0;
1100 #if FF_API_DASH_MIN_SEG_DURATION
1101 if (c->min_seg_duration != 5000000) {
1102 av_log(s, AV_LOG_WARNING, "The min_seg_duration option is deprecated and will be removed. Please use the -seg_duration\n");
1103 c->seg_duration = c->min_seg_duration;
1106 if (c->lhls && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1107 av_log(s, AV_LOG_ERROR,
1108 "LHLS is experimental, Please set -strict experimental in order to enable it.\n");
1109 return AVERROR_EXPERIMENTAL;
1112 if (c->lhls && !c->streaming) {
1113 av_log(s, AV_LOG_WARNING, "LHLS option will be ignored as streaming is not enabled\n");
1117 if (c->lhls && !c->hls_playlist) {
1118 av_log(s, AV_LOG_WARNING, "LHLS option will be ignored as hls_playlist is not enabled\n");
1122 if (c->global_sidx && !c->single_file) {
1123 av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as single_file is not enabled\n");
1127 if (c->global_sidx && c->streaming) {
1128 av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as streaming is enabled\n");
1132 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
1133 ptr = strrchr(c->dirname, '/');
1135 av_strlcpy(basename, &ptr[1], sizeof(basename));
1138 c->dirname[0] = '\0';
1139 av_strlcpy(basename, s->url, sizeof(basename));
1142 ptr = strrchr(basename, '.');
1146 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
1148 return AVERROR(ENOMEM);
1150 if ((ret = parse_adaptation_sets(s)) < 0)
1153 if ((ret = init_segment_types(s)) < 0)
1156 for (i = 0; i < s->nb_streams; i++) {
1157 OutputStream *os = &c->streams[i];
1158 AdaptationSet *as = &c->as[os->as_idx - 1];
1159 AVFormatContext *ctx;
1161 AVDictionary *opts = NULL;
1162 char filename[1024];
1164 os->bit_rate = s->streams[i]->codecpar->bit_rate;
1165 if (!os->bit_rate) {
1166 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
1167 AV_LOG_ERROR : AV_LOG_WARNING;
1168 av_log(s, level, "No bit rate set for stream %d\n", i);
1169 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
1170 return AVERROR(EINVAL);
1173 // copy AdaptationSet language and role from stream metadata
1174 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
1175 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
1177 ctx = avformat_alloc_context();
1179 return AVERROR(ENOMEM);
1181 if (c->init_seg_name) {
1182 os->init_seg_name = av_strireplace(c->init_seg_name, "$ext$", os->format_name);
1183 if (!os->init_seg_name)
1184 return AVERROR(ENOMEM);
1186 if (c->media_seg_name) {
1187 os->media_seg_name = av_strireplace(c->media_seg_name, "$ext$", os->format_name);
1188 if (!os->media_seg_name)
1189 return AVERROR(ENOMEM);
1191 if (c->single_file_name) {
1192 os->single_file_name = av_strireplace(c->single_file_name, "$ext$", os->format_name);
1193 if (!os->single_file_name)
1194 return AVERROR(ENOMEM);
1197 if (os->segment_type == SEGMENT_TYPE_WEBM) {
1198 if ((!c->single_file && check_file_extension(os->init_seg_name, os->format_name) != 0) ||
1199 (!c->single_file && check_file_extension(os->media_seg_name, os->format_name) != 0) ||
1200 (c->single_file && check_file_extension(os->single_file_name, os->format_name) != 0)) {
1201 av_log(s, AV_LOG_WARNING,
1202 "One or many segment file names doesn't end with .webm. "
1203 "Override -init_seg_name and/or -media_seg_name and/or "
1204 "-single_file_name to end with the extension .webm\n");
1207 // Streaming not supported as matroskaenc buffers internally before writing the output
1208 av_log(s, AV_LOG_WARNING, "One or more streams in WebM output format. Streaming option will be ignored\n");
1213 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
1215 return AVERROR_MUXER_NOT_FOUND;
1217 ctx->interrupt_callback = s->interrupt_callback;
1218 ctx->opaque = s->opaque;
1219 ctx->io_close = s->io_close;
1220 ctx->io_open = s->io_open;
1221 ctx->strict_std_compliance = s->strict_std_compliance;
1223 if (!(st = avformat_new_stream(ctx, NULL)))
1224 return AVERROR(ENOMEM);
1225 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
1226 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
1227 st->time_base = s->streams[i]->time_base;
1228 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
1229 ctx->avoid_negative_ts = s->avoid_negative_ts;
1230 ctx->flags = s->flags;
1232 if (c->single_file) {
1233 if (os->single_file_name)
1234 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->single_file_name, i, 0, os->bit_rate, 0);
1236 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.%s", basename, i, os->format_name);
1238 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->init_seg_name, i, 0, os->bit_rate, 0);
1240 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1241 set_http_options(&opts, c);
1242 if (!c->single_file) {
1243 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
1245 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
1247 ctx->url = av_strdup(filename);
1248 ret = avio_open2(&ctx->pb, filename, AVIO_FLAG_WRITE, NULL, &opts);
1250 av_dict_free(&opts);
1253 os->init_start_pos = 0;
1255 if (c->format_options_str) {
1256 ret = av_dict_parse_string(&opts, c->format_options_str, "=", ":", 0);
1261 if (os->segment_type == SEGMENT_TYPE_MP4) {
1263 // frag_every_frame : Allows lower latency streaming
1264 // skip_sidx : Reduce bitrate overhead
1265 // skip_trailer : Avoids growing memory usage with time
1266 av_dict_set(&opts, "movflags", "frag_every_frame+dash+delay_moov+skip_sidx+skip_trailer", 0);
1269 av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov+global_sidx+skip_trailer", 0);
1271 av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov+skip_trailer", 0);
1274 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
1275 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
1276 av_dict_set_int(&opts, "dash", 1, 0);
1277 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
1278 av_dict_set_int(&opts, "live", 1, 0);
1280 ret = avformat_init_output(ctx, &opts);
1281 av_dict_free(&opts);
1285 avio_flush(ctx->pb);
1287 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1289 s->streams[i]->time_base = st->time_base;
1290 // If the muxer wants to shift timestamps, request to have them shifted
1291 // already before being handed to this muxer, so we don't have mismatches
1292 // between the MPD and the actual segments.
1293 s->avoid_negative_ts = ctx->avoid_negative_ts;
1294 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1295 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1296 if (avg_frame_rate.num > 0) {
1297 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1298 as->min_frame_rate = avg_frame_rate;
1299 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1300 as->max_frame_rate = avg_frame_rate;
1302 as->ambiguous_frame_rate = 1;
1307 set_codec_str(s, st->codecpar, &st->avg_frame_rate, os->codec_str,
1308 sizeof(os->codec_str));
1309 os->first_pts = AV_NOPTS_VALUE;
1310 os->max_pts = AV_NOPTS_VALUE;
1311 os->last_dts = AV_NOPTS_VALUE;
1312 os->segment_index = 1;
1314 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1315 c->nr_of_streams_to_flush++;
1318 if (!c->has_video && c->seg_duration <= 0) {
1319 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1320 return AVERROR(EINVAL);
1323 c->nr_of_streams_flushed = 0;
1328 static int dash_write_header(AVFormatContext *s)
1330 DASHContext *c = s->priv_data;
1332 for (i = 0; i < s->nb_streams; i++) {
1333 OutputStream *os = &c->streams[i];
1334 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1337 // Flush init segment
1338 // Only for WebM segment, since for mp4 delay_moov is set and
1339 // the init segment is thus flushed after the first packets.
1340 if (os->segment_type == SEGMENT_TYPE_WEBM &&
1341 (ret = flush_init_segment(s, os)) < 0)
1347 static int add_segment(OutputStream *os, const char *file,
1348 int64_t time, int64_t duration,
1349 int64_t start_pos, int64_t range_length,
1350 int64_t index_length, int next_exp_index)
1354 if (os->nb_segments >= os->segments_size) {
1355 os->segments_size = (os->segments_size + 1) * 2;
1356 if ((err = av_reallocp(&os->segments, sizeof(*os->segments) *
1357 os->segments_size)) < 0) {
1358 os->segments_size = 0;
1359 os->nb_segments = 0;
1363 seg = av_mallocz(sizeof(*seg));
1365 return AVERROR(ENOMEM);
1366 av_strlcpy(seg->file, file, sizeof(seg->file));
1368 seg->duration = duration;
1369 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1370 seg->duration += seg->time;
1373 seg->start_pos = start_pos;
1374 seg->range_length = range_length;
1375 seg->index_length = index_length;
1376 os->segments[os->nb_segments++] = seg;
1377 os->segment_index++;
1378 //correcting the segment index if it has fallen behind the expected value
1379 if (os->segment_index < next_exp_index) {
1380 av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n",
1381 file, os->segment_index, next_exp_index);
1382 os->segment_index = next_exp_index;
1387 static void write_styp(AVIOContext *pb)
1390 ffio_wfourcc(pb, "styp");
1391 ffio_wfourcc(pb, "msdh");
1392 avio_wb32(pb, 0); /* minor */
1393 ffio_wfourcc(pb, "msdh");
1394 ffio_wfourcc(pb, "msix");
1397 static void find_index_range(AVFormatContext *s, const char *full_path,
1398 int64_t pos, int *index_length)
1404 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1407 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1408 ff_format_io_close(s, &pb);
1411 ret = avio_read(pb, buf, 8);
1412 ff_format_io_close(s, &pb);
1415 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1417 *index_length = AV_RB32(&buf[0]);
1420 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1421 AVCodecParameters *par,
1422 AVRational *frame_rate)
1426 if (os->ctx->streams[0]->codecpar->extradata_size || !par->extradata_size)
1429 extradata = av_malloc(par->extradata_size);
1432 return AVERROR(ENOMEM);
1434 memcpy(extradata, par->extradata, par->extradata_size);
1436 os->ctx->streams[0]->codecpar->extradata = extradata;
1437 os->ctx->streams[0]->codecpar->extradata_size = par->extradata_size;
1439 set_codec_str(s, par, frame_rate, os->codec_str, sizeof(os->codec_str));
1444 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1445 DASHContext *c = s->priv_data;
1446 int http_base_proto = ff_is_http_proto(filename);
1448 if (http_base_proto) {
1449 AVIOContext *out = NULL;
1450 AVDictionary *http_opts = NULL;
1452 set_http_options(&http_opts, c);
1453 av_dict_set(&http_opts, "method", "DELETE", 0);
1455 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1456 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1459 av_dict_free(&http_opts);
1460 ff_format_io_close(s, &out);
1462 int res = avpriv_io_delete(filename);
1464 char errbuf[AV_ERROR_MAX_STRING_SIZE];
1465 av_strerror(res, errbuf, sizeof(errbuf));
1466 av_log(s, (res == AVERROR(ENOENT) ? AV_LOG_WARNING : AV_LOG_ERROR), "failed to delete %s: %s\n", filename, errbuf);
1471 static int dashenc_delete_segment_file(AVFormatContext *s, const char* file)
1473 DASHContext *c = s->priv_data;
1474 size_t dirname_len, file_len;
1475 char filename[1024];
1477 dirname_len = strlen(c->dirname);
1478 if (dirname_len >= sizeof(filename)) {
1479 av_log(s, AV_LOG_WARNING, "Cannot delete segments as the directory path is too long: %"PRIu64" characters: %s\n",
1480 (uint64_t)dirname_len, c->dirname);
1481 return AVERROR(ENAMETOOLONG);
1484 memcpy(filename, c->dirname, dirname_len);
1486 file_len = strlen(file);
1487 if ((dirname_len + file_len) >= sizeof(filename)) {
1488 av_log(s, AV_LOG_WARNING, "Cannot delete segments as the path is too long: %"PRIu64" characters: %s%s\n",
1489 (uint64_t)(dirname_len + file_len), c->dirname, file);
1490 return AVERROR(ENAMETOOLONG);
1493 memcpy(filename + dirname_len, file, file_len + 1); // include the terminating zero
1494 dashenc_delete_file(s, filename);
1499 static inline void dashenc_delete_media_segments(AVFormatContext *s, OutputStream *os, int remove_count)
1501 for (int i = 0; i < remove_count; ++i) {
1502 dashenc_delete_segment_file(s, os->segments[i]->file);
1504 // Delete the segment regardless of whether the file was successfully deleted
1505 av_free(os->segments[i]);
1508 os->nb_segments -= remove_count;
1509 memmove(os->segments, os->segments + remove_count, os->nb_segments * sizeof(*os->segments));
1512 static int dash_flush(AVFormatContext *s, int final, int stream)
1514 DASHContext *c = s->priv_data;
1517 const char *proto = avio_find_protocol_name(s->url);
1518 int use_rename = proto && !strcmp(proto, "file");
1520 int cur_flush_segment_index = 0, next_exp_index = -1;
1522 cur_flush_segment_index = c->streams[stream].segment_index;
1524 //finding the next segment's expected index, based on the current pts value
1525 if (c->use_template && !c->use_timeline && c->index_correction &&
1526 c->streams[stream].last_pts != AV_NOPTS_VALUE &&
1527 c->streams[stream].first_pts != AV_NOPTS_VALUE) {
1528 int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts -
1529 c->streams[stream].first_pts,
1530 s->streams[stream]->time_base,
1532 next_exp_index = (pts_diff / c->seg_duration) + 1;
1536 for (i = 0; i < s->nb_streams; i++) {
1537 OutputStream *os = &c->streams[i];
1538 AVStream *st = s->streams[i];
1539 int range_length, index_length = 0;
1541 if (!os->packets_written)
1544 // Flush the single stream that got a keyframe right now.
1545 // Flush all audio streams as well, in sync with video keyframes,
1546 // but not the other video streams.
1547 if (stream >= 0 && i != stream) {
1548 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1550 // Make sure we don't flush audio streams multiple times, when
1551 // all video streams are flushed one at a time.
1552 if (c->has_video && os->segment_index > cur_flush_segment_index)
1556 if (!c->single_file) {
1557 if (os->segment_type == SEGMENT_TYPE_MP4 && !os->written_len)
1558 write_styp(os->ctx->pb);
1560 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1563 ret = flush_dynbuf(c, os, &range_length);
1566 os->packets_written = 0;
1568 if (c->single_file) {
1569 find_index_range(s, os->full_path, os->pos, &index_length);
1571 dashenc_io_close(s, &os->out, os->temp_path);
1574 ret = avpriv_io_move(os->temp_path, os->full_path);
1580 if (!os->muxer_overhead)
1581 os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1583 av_rescale_q(os->max_pts - os->start_pts,
1584 st->time_base, AV_TIME_BASE_Q);
1585 os->total_pkt_size = 0;
1587 if (!os->bit_rate) {
1588 // calculate average bitrate of first segment
1589 int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / av_rescale_q(os->max_pts - os->start_pts,
1593 os->bit_rate = bitrate;
1595 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index);
1596 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1598 os->pos += range_length;
1601 if (c->window_size) {
1602 for (i = 0; i < s->nb_streams; i++) {
1603 OutputStream *os = &c->streams[i];
1604 int remove_count = os->nb_segments - c->window_size - c->extra_window_size;
1605 if (remove_count > 0)
1606 dashenc_delete_media_segments(s, os, remove_count);
1611 for (i = 0; i < s->nb_streams; i++) {
1612 OutputStream *os = &c->streams[i];
1613 if (os->ctx && os->ctx_inited) {
1614 int file_size = avio_tell(os->ctx->pb);
1615 av_write_trailer(os->ctx);
1616 if (c->global_sidx) {
1617 int j, start_index, start_number;
1618 int sidx_size = avio_tell(os->ctx->pb) - file_size;
1619 get_start_index_number(os, c, &start_index, &start_number);
1620 if (start_index >= os->nb_segments ||
1621 os->segment_type != SEGMENT_TYPE_MP4)
1623 os->init_range_length += sidx_size;
1624 for (j = start_index; j < os->nb_segments; j++) {
1625 Segment *seg = os->segments[j];
1626 seg->start_pos += sidx_size;
1634 if (c->has_video && !final) {
1635 c->nr_of_streams_flushed++;
1636 if (c->nr_of_streams_flushed != c->nr_of_streams_to_flush)
1639 c->nr_of_streams_flushed = 0;
1641 ret = write_manifest(s, final);
1646 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
1648 DASHContext *c = s->priv_data;
1649 AVStream *st = s->streams[pkt->stream_index];
1650 OutputStream *os = &c->streams[pkt->stream_index];
1651 int64_t seg_end_duration, elapsed_duration;
1654 ret = update_stream_extradata(s, os, st->codecpar, &st->avg_frame_rate);
1658 // Fill in a heuristic guess of the packet duration, if none is available.
1659 // The mp4 muxer will do something similar (for the last packet in a fragment)
1660 // if nothing is set (setting it for the other packets doesn't hurt).
1661 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
1662 // invoke its heuristic (this doesn't have to be identical to that algorithm),
1663 // so that we know the exact timestamps of fragments.
1664 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
1665 pkt->duration = pkt->dts - os->last_dts;
1666 os->last_dts = pkt->dts;
1668 // If forcing the stream to start at 0, the mp4 muxer will set the start
1669 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
1670 if (os->first_pts == AV_NOPTS_VALUE &&
1671 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
1672 pkt->pts -= pkt->dts;
1676 if (os->first_pts == AV_NOPTS_VALUE)
1677 os->first_pts = pkt->pts;
1678 os->last_pts = pkt->pts;
1680 if (!c->availability_start_time[0]) {
1681 int64_t start_time_us = av_gettime();
1682 c->start_time_s = start_time_us / 1000000;
1683 format_date_now(c->availability_start_time,
1684 sizeof(c->availability_start_time));
1687 if (!os->availability_time_offset && pkt->duration) {
1688 int64_t frame_duration = av_rescale_q(pkt->duration, st->time_base,
1690 os->availability_time_offset = ((double) c->seg_duration -
1691 frame_duration) / AV_TIME_BASE;
1694 if (c->use_template && !c->use_timeline) {
1695 elapsed_duration = pkt->pts - os->first_pts;
1696 seg_end_duration = (int64_t) os->segment_index * c->seg_duration;
1698 elapsed_duration = pkt->pts - os->start_pts;
1699 seg_end_duration = c->seg_duration;
1702 if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1703 pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
1704 av_compare_ts(elapsed_duration, st->time_base,
1705 seg_end_duration, AV_TIME_BASE_Q) >= 0) {
1706 int64_t prev_duration = c->last_duration;
1708 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
1711 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
1715 if ((!c->use_timeline || !c->use_template) && prev_duration) {
1716 if (c->last_duration < prev_duration*9/10 ||
1717 c->last_duration > prev_duration*11/10) {
1718 av_log(s, AV_LOG_WARNING,
1719 "Segment durations differ too much, enable use_timeline "
1720 "and use_template, or keep a stricter keyframe interval\n");
1724 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
1728 if (!os->packets_written) {
1729 // If we wrote a previous segment, adjust the start time of the segment
1730 // to the end of the previous one (which is the same as the mp4 muxer
1731 // does). This avoids gaps in the timeline.
1732 if (os->max_pts != AV_NOPTS_VALUE)
1733 os->start_pts = os->max_pts;
1735 os->start_pts = pkt->pts;
1737 if (os->max_pts == AV_NOPTS_VALUE)
1738 os->max_pts = pkt->pts + pkt->duration;
1740 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
1741 os->packets_written++;
1742 os->total_pkt_size += pkt->size;
1743 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
1746 if (!os->init_range_length)
1747 flush_init_segment(s, os);
1749 //open the output context when the first frame of a segment is ready
1750 if (!c->single_file && os->packets_written == 1) {
1751 AVDictionary *opts = NULL;
1752 const char *proto = avio_find_protocol_name(s->url);
1753 int use_rename = proto && !strcmp(proto, "file");
1754 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
1755 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
1756 os->media_seg_name, pkt->stream_index,
1757 os->segment_index, os->bit_rate, os->start_pts);
1758 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
1760 snprintf(os->temp_path, sizeof(os->temp_path),
1761 use_rename ? "%s.tmp" : "%s", os->full_path);
1762 set_http_options(&opts, c);
1763 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
1764 av_dict_free(&opts);
1766 return handle_io_open_error(s, ret, os->temp_path);
1769 char *prefetch_url = use_rename ? NULL : os->filename;
1770 write_hls_media_playlist(os, s, pkt->stream_index, 0, prefetch_url);
1774 //write out the data immediately in streaming mode
1775 if (c->streaming && os->segment_type == SEGMENT_TYPE_MP4) {
1777 uint8_t *buf = NULL;
1778 if (!os->written_len)
1779 write_styp(os->ctx->pb);
1780 avio_flush(os->ctx->pb);
1781 len = avio_get_dyn_buf (os->ctx->pb, &buf);
1783 avio_write(os->out, buf + os->written_len, len - os->written_len);
1784 avio_flush(os->out);
1786 os->written_len = len;
1792 static int dash_write_trailer(AVFormatContext *s)
1794 DASHContext *c = s->priv_data;
1797 if (s->nb_streams > 0) {
1798 OutputStream *os = &c->streams[0];
1799 // If no segments have been written so far, try to do a crude
1800 // guess of the segment duration
1801 if (!c->last_duration)
1802 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
1803 s->streams[0]->time_base,
1805 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
1806 s->streams[0]->time_base,
1809 dash_flush(s, 1, -1);
1811 if (c->remove_at_exit) {
1812 for (i = 0; i < s->nb_streams; ++i) {
1813 OutputStream *os = &c->streams[i];
1814 dashenc_delete_media_segments(s, os, os->nb_segments);
1815 dashenc_delete_segment_file(s, os->initfile);
1816 if (c->hls_playlist && os->segment_type == SEGMENT_TYPE_MP4) {
1817 char filename[1024];
1818 get_hls_playlist_name(filename, sizeof(filename), c->dirname, i);
1819 dashenc_delete_file(s, filename);
1822 dashenc_delete_file(s, s->url);
1824 if (c->hls_playlist && c->master_playlist_created) {
1825 char filename[1024];
1826 snprintf(filename, sizeof(filename), "%smaster.m3u8", c->dirname);
1827 dashenc_delete_file(s, filename);
1834 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
1836 DASHContext *c = s->priv_data;
1837 OutputStream *os = &c->streams[avpkt->stream_index];
1838 AVFormatContext *oc = os->ctx;
1839 if (oc->oformat->check_bitstream) {
1841 AVPacket pkt = *avpkt;
1842 pkt.stream_index = 0;
1843 ret = oc->oformat->check_bitstream(oc, &pkt);
1845 AVStream *st = s->streams[avpkt->stream_index];
1846 AVStream *ost = oc->streams[0];
1847 st->internal->bsfcs = ost->internal->bsfcs;
1848 st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1849 ost->internal->bsfcs = NULL;
1850 ost->internal->nb_bsfcs = 0;
1857 #define OFFSET(x) offsetof(DASHContext, x)
1858 #define E AV_OPT_FLAG_ENCODING_PARAM
1859 static const AVOption options[] = {
1860 { "adaptation_sets", "Adaptation sets. Syntax: id=0,streams=0,1,2 id=1,streams=3,4 and so on", OFFSET(adaptation_sets), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
1861 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
1862 { "extra_window_size", "number of segments kept outside of the manifest before removing from disk", OFFSET(extra_window_size), AV_OPT_TYPE_INT, { .i64 = 5 }, 0, INT_MAX, E },
1863 #if FF_API_DASH_MIN_SEG_DURATION
1864 { "min_seg_duration", "minimum segment duration (in microseconds) (will be deprecated)", OFFSET(min_seg_duration), AV_OPT_TYPE_INT, { .i64 = 5000000 }, 0, INT_MAX, E },
1866 { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
1867 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1868 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1869 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1870 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1871 { "single_file_name", "DASH-templated name to be used for baseURL. Implies storing all segments in one file, accessed using byte ranges", OFFSET(single_file_name), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
1872 { "init_seg_name", "DASH-templated name to used for the initialization segment", OFFSET(init_seg_name), AV_OPT_TYPE_STRING, {.str = "init-stream$RepresentationID$.$ext$"}, 0, 0, E },
1873 { "media_seg_name", "DASH-templated name to used for the media segments", OFFSET(media_seg_name), AV_OPT_TYPE_STRING, {.str = "chunk-stream$RepresentationID$-$Number%05d$.$ext$"}, 0, 0, E },
1874 { "utc_timing_url", "URL of the page that will return the UTC timestamp in ISO format", OFFSET(utc_timing_url), AV_OPT_TYPE_STRING, { 0 }, 0, 0, E },
1875 { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1876 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1877 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1878 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1879 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1880 { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
1881 { "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1882 { "format_options","set list of options for the container format (mp4/webm) used for dash", OFFSET(format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1883 { "global_sidx", "Write global SIDX atom. Applicable only for single file, mp4 output, non-streaming mode", OFFSET(global_sidx), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1884 { "dash_segment_type", "set dash segment files type", OFFSET(segment_type_option), AV_OPT_TYPE_INT, {.i64 = SEGMENT_TYPE_AUTO }, 0, SEGMENT_TYPE_NB - 1, E, "segment_type"},
1885 { "auto", "select segment file format based on codec", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_AUTO }, 0, UINT_MAX, E, "segment_type"},
1886 { "mp4", "make segment file in ISOBMFF format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MP4 }, 0, UINT_MAX, E, "segment_type"},
1887 { "webm", "make segment file in WebM format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_WEBM }, 0, UINT_MAX, E, "segment_type"},
1888 { "ignore_io_errors", "Ignore IO errors during open and write. Useful for long-duration runs with network output", OFFSET(ignore_io_errors), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1889 { "lhls", "Enable Low-latency HLS(Experimental). Adds #EXT-X-PREFETCH tag with current segment's URI", OFFSET(lhls), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1890 { "master_m3u8_publish_rate", "Publish master playlist every after this many segment intervals", OFFSET(master_publish_rate), AV_OPT_TYPE_INT, {.i64 = 0}, 0, UINT_MAX, E},
1894 static const AVClass dash_class = {
1895 .class_name = "dash muxer",
1896 .item_name = av_default_item_name,
1898 .version = LIBAVUTIL_VERSION_INT,
1901 AVOutputFormat ff_dash_muxer = {
1903 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
1904 .extensions = "mpd",
1905 .priv_data_size = sizeof(DASHContext),
1906 .audio_codec = AV_CODEC_ID_AAC,
1907 .video_codec = AV_CODEC_ID_H264,
1908 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
1910 .write_header = dash_write_header,
1911 .write_packet = dash_write_packet,
1912 .write_trailer = dash_write_trailer,
1913 .deinit = dash_free,
1914 .check_bitstream = dash_check_bitstream,
1915 .priv_class = &dash_class,