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_internal.h"
39 #include "avio_internal.h"
40 #include "hlsplaylist.h"
41 #if CONFIG_HTTP_PROTOCOL
46 #include "os_support.h"
52 SEGMENT_TYPE_AUTO = 0,
58 typedef struct Segment {
61 int range_length, index_length;
67 typedef struct AdaptationSet {
69 enum AVMediaType media_type;
70 AVDictionary *metadata;
71 AVRational min_frame_rate, max_frame_rate;
72 int ambiguous_frame_rate;
75 typedef struct OutputStream {
77 int ctx_inited, as_idx;
81 int64_t init_start_pos, pos;
82 int init_range_length;
83 int nb_segments, segments_size, segment_index;
85 int64_t first_pts, start_pts, max_pts;
86 int64_t last_dts, last_pts;
88 SegmentType segment_type; /* segment type selected for this particular stream */
89 const char *format_name;
90 const char *single_file_name; /* file names selected for this particular stream */
91 const char *init_seg_name;
92 const char *media_seg_name;
99 double availability_time_offset;
104 typedef struct DASHContext {
105 const AVClass *class; /* Class for private options. */
106 char *adaptation_sets;
110 int extra_window_size;
111 #if FF_API_DASH_MIN_SEG_DURATION
112 int min_seg_duration;
114 int64_t seg_duration;
119 OutputStream *streams;
121 int64_t last_duration;
122 int64_t total_duration;
123 char availability_start_time[100];
125 const char *single_file_name; /* file names as specified in options */
126 const char *init_seg_name;
127 const char *media_seg_name;
128 const char *utc_timing_url;
130 const char *user_agent;
133 int master_playlist_created;
134 AVIOContext *mpd_out;
135 AVIOContext *m3u8_out;
138 int index_correction;
139 char *format_options_str;
140 SegmentType segment_type_option; /* segment type as specified in options */
143 static struct codec_string {
147 { AV_CODEC_ID_VP8, "vp8" },
148 { AV_CODEC_ID_VP9, "vp9" },
149 { AV_CODEC_ID_VORBIS, "vorbis" },
150 { AV_CODEC_ID_OPUS, "opus" },
151 { AV_CODEC_ID_FLAC, "flac" },
155 static struct format_string {
156 SegmentType segment_type;
159 { SEGMENT_TYPE_AUTO, "auto" },
160 { SEGMENT_TYPE_MP4, "mp4" },
161 { SEGMENT_TYPE_WEBM, "webm" },
165 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
166 AVDictionary **options) {
167 DASHContext *c = s->priv_data;
168 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
169 int err = AVERROR_MUXER_NOT_FOUND;
170 if (!*pb || !http_base_proto || !c->http_persistent) {
171 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
172 #if CONFIG_HTTP_PROTOCOL
174 URLContext *http_url_context = ffio_geturlcontext(*pb);
175 av_assert0(http_url_context);
176 err = ff_http_do_new_request(http_url_context, filename);
178 ff_format_io_close(s, pb);
184 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
185 DASHContext *c = s->priv_data;
186 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
191 if (!http_base_proto || !c->http_persistent) {
192 ff_format_io_close(s, pb);
193 #if CONFIG_HTTP_PROTOCOL
195 URLContext *http_url_context = ffio_geturlcontext(*pb);
196 av_assert0(http_url_context);
198 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
203 static const char *get_format_str(SegmentType segment_type) {
205 for (i = 0; i < SEGMENT_TYPE_NB; i++)
206 if (formats[i].segment_type == segment_type)
207 return formats[i].str;
211 static inline SegmentType select_segment_type(SegmentType segment_type, enum AVCodecID codec_id)
213 if (segment_type == SEGMENT_TYPE_AUTO) {
214 if (codec_id == AV_CODEC_ID_OPUS || codec_id == AV_CODEC_ID_VORBIS ||
215 codec_id == AV_CODEC_ID_VP8 || codec_id == AV_CODEC_ID_VP9) {
216 segment_type = SEGMENT_TYPE_WEBM;
218 segment_type = SEGMENT_TYPE_MP4;
225 static int init_segment_types(AVFormatContext *s)
227 DASHContext *c = s->priv_data;
228 for (int i = 0; i < s->nb_streams; ++i) {
229 OutputStream *os = &c->streams[i];
230 SegmentType segment_type = select_segment_type(
231 c->segment_type_option, s->streams[i]->codecpar->codec_id);
232 os->segment_type = segment_type;
233 os->format_name = get_format_str(segment_type);
234 if (!os->format_name) {
235 av_log(s, AV_LOG_ERROR, "Could not select DASH segment type for stream %d\n", i);
236 return AVERROR_MUXER_NOT_FOUND;
243 static int check_file_extension(const char *filename, const char *extension) {
245 if (!filename || !extension)
247 dot = strrchr(filename, '.');
248 if (dot && !strcmp(dot + 1, extension))
253 static void set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par,
254 AVRational *frame_rate, char *str, int size) {
256 int ret = ff_isom_get_vpcc_features(s, par, frame_rate, &vpcc);
258 av_strlcatf(str, size, "vp09.%02d.%02d.%02d",
259 vpcc.profile, vpcc.level, vpcc.bitdepth);
261 // Default to just vp9 in case of error while finding out profile or level
262 av_log(s, AV_LOG_WARNING, "Could not find VP9 profile and/or level\n");
263 av_strlcpy(str, "vp9", size);
268 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
269 AVRational *frame_rate, char *str, int size)
271 const AVCodecTag *tags[2] = { NULL, NULL };
275 // common Webm codecs are not part of RFC 6381
276 for (i = 0; codecs[i].id; i++)
277 if (codecs[i].id == par->codec_id) {
278 if (codecs[i].id == AV_CODEC_ID_VP9) {
279 set_vp9_codec_str(s, par, frame_rate, str, size);
281 av_strlcpy(str, codecs[i].str, size);
286 // for codecs part of RFC 6381
287 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
288 tags[0] = ff_codec_movvideo_tags;
289 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
290 tags[0] = ff_codec_movaudio_tags;
294 tag = par->codec_tag;
296 tag = av_codec_get_tag(tags, par->codec_id);
304 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
306 tags[0] = ff_mp4_obj_type;
307 oti = av_codec_get_tag(tags, par->codec_id);
309 av_strlcatf(str, size, ".%02"PRIx32, oti);
313 if (tag == MKTAG('m', 'p', '4', 'a')) {
314 if (par->extradata_size >= 2) {
315 int aot = par->extradata[0] >> 3;
317 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
318 av_strlcatf(str, size, ".%d", aot);
320 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
321 // Unimplemented, should output ProfileLevelIndication as a decimal number
322 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
324 } else if (!strcmp(str, "avc1")) {
325 uint8_t *tmpbuf = NULL;
326 uint8_t *extradata = par->extradata;
327 int extradata_size = par->extradata_size;
330 if (extradata[0] != 1) {
332 if (avio_open_dyn_buf(&pb) < 0)
334 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
335 ffio_free_dyn_buf(&pb);
338 extradata_size = avio_close_dyn_buf(pb, &extradata);
342 if (extradata_size >= 4)
343 av_strlcatf(str, size, ".%02x%02x%02x",
344 extradata[1], extradata[2], extradata[3]);
349 static int flush_dynbuf(OutputStream *os, int *range_length)
354 return AVERROR(EINVAL);
358 av_write_frame(os->ctx, NULL);
359 avio_flush(os->ctx->pb);
362 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
365 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
370 return avio_open_dyn_buf(&os->ctx->pb);
373 static void set_http_options(AVDictionary **options, DASHContext *c)
376 av_dict_set(options, "method", c->method, 0);
378 av_dict_set(options, "user_agent", c->user_agent, 0);
379 if (c->http_persistent)
380 av_dict_set_int(options, "multiple_requests", 1, 0);
382 av_dict_set_int(options, "timeout", c->timeout, 0);
385 static void get_hls_playlist_name(char *playlist_name, int string_size,
386 const char *base_url, int id) {
388 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
390 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
393 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
395 DASHContext *c = s->priv_data;
396 int ret, range_length;
398 ret = flush_dynbuf(os, &range_length);
402 os->pos = os->init_range_length = range_length;
403 if (!c->single_file) {
405 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
406 dashenc_io_close(s, &os->out, filename);
411 static void dash_free(AVFormatContext *s)
413 DASHContext *c = s->priv_data;
417 for (i = 0; i < c->nb_as; i++)
418 av_dict_free(&c->as[i].metadata);
425 for (i = 0; i < s->nb_streams; i++) {
426 OutputStream *os = &c->streams[i];
427 if (os->ctx && os->ctx_inited)
428 av_write_trailer(os->ctx);
429 if (os->ctx && os->ctx->pb)
430 ffio_free_dyn_buf(&os->ctx->pb);
431 ff_format_io_close(s, &os->out);
433 avformat_free_context(os->ctx);
434 for (j = 0; j < os->nb_segments; j++)
435 av_free(os->segments[j]);
436 av_free(os->segments);
437 av_freep(&os->single_file_name);
438 av_freep(&os->init_seg_name);
439 av_freep(&os->media_seg_name);
441 av_freep(&c->streams);
443 ff_format_io_close(s, &c->mpd_out);
444 ff_format_io_close(s, &c->m3u8_out);
447 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
448 int representation_id, int final)
450 DASHContext *c = s->priv_data;
451 int i, start_index = 0, start_number = 1;
452 if (c->window_size) {
453 start_index = FFMAX(os->nb_segments - c->window_size, 0);
454 start_number = FFMAX(os->segment_index - c->window_size, 1);
457 if (c->use_template) {
458 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
459 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
460 if (!c->use_timeline) {
461 avio_printf(out, "duration=\"%"PRId64"\" ", c->seg_duration);
462 if (c->streaming && os->availability_time_offset)
463 avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
464 os->availability_time_offset);
466 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", os->init_seg_name, os->media_seg_name, c->use_timeline ? start_number : 1);
467 if (c->use_timeline) {
468 int64_t cur_time = 0;
469 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
470 for (i = start_index; i < os->nb_segments; ) {
471 Segment *seg = os->segments[i];
473 avio_printf(out, "\t\t\t\t\t\t<S ");
474 if (i == start_index || seg->time != cur_time) {
475 cur_time = seg->time;
476 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
478 avio_printf(out, "d=\"%"PRId64"\" ", seg->duration);
479 while (i + repeat + 1 < os->nb_segments &&
480 os->segments[i + repeat + 1]->duration == seg->duration &&
481 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
484 avio_printf(out, "r=\"%d\" ", repeat);
485 avio_printf(out, "/>\n");
487 cur_time += (1 + repeat) * seg->duration;
489 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
491 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
492 } else if (c->single_file) {
493 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
494 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
495 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);
496 for (i = start_index; i < os->nb_segments; i++) {
497 Segment *seg = os->segments[i];
498 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
499 if (seg->index_length)
500 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
501 avio_printf(out, "/>\n");
503 avio_printf(out, "\t\t\t\t</SegmentList>\n");
505 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
506 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
507 for (i = start_index; i < os->nb_segments; i++) {
508 Segment *seg = os->segments[i];
509 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
511 avio_printf(out, "\t\t\t\t</SegmentList>\n");
513 if (c->hls_playlist && start_index < os->nb_segments)
515 int timescale = os->ctx->streams[0]->time_base.den;
516 char temp_filename_hls[1024];
517 char filename_hls[1024];
518 AVDictionary *http_opts = NULL;
519 int target_duration = 0;
521 const char *proto = avio_find_protocol_name(c->dirname);
522 int use_rename = proto && !strcmp(proto, "file");
524 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
525 c->dirname, representation_id);
527 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
529 set_http_options(&http_opts, c);
530 dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
531 av_dict_free(&http_opts);
532 for (i = start_index; i < os->nb_segments; i++) {
533 Segment *seg = os->segments[i];
534 double duration = (double) seg->duration / timescale;
535 if (target_duration <= duration)
536 target_duration = lrint(duration);
539 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
540 start_number, PLAYLIST_TYPE_NONE);
542 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
543 os->init_range_length, os->init_start_pos);
545 for (i = start_index; i < os->nb_segments; i++) {
546 Segment *seg = os->segments[i];
547 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
548 (double) seg->duration / timescale, 0,
549 seg->range_length, seg->start_pos, NULL,
550 c->single_file ? os->initfile : seg->file,
553 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
558 ff_hls_write_end_list(c->m3u8_out);
560 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
563 if (avpriv_io_move(temp_filename_hls, filename_hls) < 0) {
564 av_log(os->ctx, AV_LOG_WARNING, "renaming file %s to %s failed\n\n", temp_filename_hls, filename_hls);
570 static char *xmlescape(const char *str) {
571 int outlen = strlen(str)*3/2 + 6;
572 char *out = av_realloc(NULL, outlen + 1);
576 for (; *str; str++) {
577 if (pos + 6 > outlen) {
579 outlen = 2 * outlen + 6;
580 tmp = av_realloc(out, outlen + 1);
588 memcpy(&out[pos], "&", 5);
590 } else if (*str == '<') {
591 memcpy(&out[pos], "<", 4);
593 } else if (*str == '>') {
594 memcpy(&out[pos], ">", 4);
596 } else if (*str == '\'') {
597 memcpy(&out[pos], "'", 6);
599 } else if (*str == '\"') {
600 memcpy(&out[pos], """, 6);
610 static void write_time(AVIOContext *out, int64_t time)
612 int seconds = time / AV_TIME_BASE;
613 int fractions = time % AV_TIME_BASE;
614 int minutes = seconds / 60;
615 int hours = minutes / 60;
618 avio_printf(out, "PT");
620 avio_printf(out, "%dH", hours);
621 if (hours || minutes)
622 avio_printf(out, "%dM", minutes);
623 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
626 static void format_date_now(char *buf, int size)
628 time_t t = time(NULL);
629 struct tm *ptm, tmbuf;
630 ptm = gmtime_r(&t, &tmbuf);
632 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%SZ", ptm))
637 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
640 DASHContext *c = s->priv_data;
641 AdaptationSet *as = &c->as[as_index];
642 AVDictionaryEntry *lang, *role;
645 avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
646 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
647 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)
648 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
649 lang = av_dict_get(as->metadata, "language", NULL, 0);
651 avio_printf(out, " lang=\"%s\"", lang->value);
652 avio_printf(out, ">\n");
654 role = av_dict_get(as->metadata, "role", NULL, 0);
656 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
658 for (i = 0; i < s->nb_streams; i++) {
659 OutputStream *os = &c->streams[i];
660 char bandwidth_str[64] = {'\0'};
662 if (os->as_idx - 1 != as_index)
665 if (os->bit_rate > 0)
666 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"",
669 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
670 AVStream *st = s->streams[i];
671 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
672 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
673 if (st->avg_frame_rate.num)
674 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
675 avio_printf(out, ">\n");
677 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
678 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
679 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
680 s->streams[i]->codecpar->channels);
682 output_segment_list(os, out, s, i, final);
683 avio_printf(out, "\t\t\t</Representation>\n");
685 avio_printf(out, "\t\t</AdaptationSet>\n");
690 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
692 DASHContext *c = s->priv_data;
694 void *mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
696 return AVERROR(ENOMEM);
700 *as = &c->as[c->nb_as - 1];
701 memset(*as, 0, sizeof(**as));
702 (*as)->media_type = type;
707 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
709 DASHContext *c = s->priv_data;
710 AdaptationSet *as = &c->as[as_idx - 1];
711 OutputStream *os = &c->streams[i];
713 if (as->media_type != s->streams[i]->codecpar->codec_type) {
714 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
715 return AVERROR(EINVAL);
716 } else if (os->as_idx) {
717 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
718 return AVERROR(EINVAL);
725 static int parse_adaptation_sets(AVFormatContext *s)
727 DASHContext *c = s->priv_data;
728 const char *p = c->adaptation_sets;
729 enum { new_set, parse_id, parsing_streams } state;
733 // default: one AdaptationSet for each stream
735 for (i = 0; i < s->nb_streams; i++) {
736 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
738 snprintf(as->id, sizeof(as->id), "%d", i);
740 c->streams[i].as_idx = c->nb_as;
745 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
751 } else if (state == new_set && av_strstart(p, "id=", &p)) {
753 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
757 snprintf(as->id, sizeof(as->id), "%.*s", n, p);
763 } else if (state == parse_id && av_strstart(p, "streams=", &p)) {
764 state = parsing_streams;
765 } else if (state == parsing_streams) {
766 AdaptationSet *as = &c->as[c->nb_as - 1];
767 char idx_str[8], *end_str;
769 n = strcspn(p, " ,");
770 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
773 // if value is "a" or "v", map all streams of that type
774 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
775 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
776 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
778 for (i = 0; i < s->nb_streams; i++) {
779 if (s->streams[i]->codecpar->codec_type != type)
782 as->media_type = s->streams[i]->codecpar->codec_type;
784 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
787 } else { // select single stream
788 i = strtol(idx_str, &end_str, 10);
789 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
790 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
791 return AVERROR(EINVAL);
793 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
795 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
796 as->media_type = s->streams[i]->codecpar->codec_type;
799 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
808 return AVERROR(EINVAL);
813 // check for unassigned streams
814 for (i = 0; i < s->nb_streams; i++) {
815 OutputStream *os = &c->streams[i];
817 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
818 return AVERROR(EINVAL);
824 static int write_manifest(AVFormatContext *s, int final)
826 DASHContext *c = s->priv_data;
828 char temp_filename[1024];
830 const char *proto = avio_find_protocol_name(s->url);
831 int use_rename = proto && !strcmp(proto, "file");
832 static unsigned int warned_non_file = 0;
833 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
834 AVDictionary *opts = NULL;
836 if (!use_rename && !warned_non_file++)
837 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
839 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
840 set_http_options(&opts, c);
841 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
844 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
848 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
849 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
850 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
851 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
852 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
853 "\tprofiles=\"urn:mpeg:dash:profile:isoff-live:2011\"\n"
854 "\ttype=\"%s\"\n", final ? "static" : "dynamic");
856 avio_printf(out, "\tmediaPresentationDuration=\"");
857 write_time(out, c->total_duration);
858 avio_printf(out, "\"\n");
860 int64_t update_period = c->last_duration / AV_TIME_BASE;
862 if (c->use_template && !c->use_timeline)
864 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
865 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
866 if (c->availability_start_time[0])
867 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
868 format_date_now(now_str, sizeof(now_str));
870 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
871 if (c->window_size && c->use_template) {
872 avio_printf(out, "\ttimeShiftBufferDepth=\"");
873 write_time(out, c->last_duration * c->window_size);
874 avio_printf(out, "\"\n");
877 avio_printf(out, "\tminBufferTime=\"");
878 write_time(out, c->last_duration * 2);
879 avio_printf(out, "\">\n");
880 avio_printf(out, "\t<ProgramInformation>\n");
882 char *escaped = xmlescape(title->value);
883 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
886 avio_printf(out, "\t</ProgramInformation>\n");
888 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
889 OutputStream *os = &c->streams[0];
890 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
891 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
892 avio_printf(out, "\t<Period id=\"0\" start=\"");
893 write_time(out, start_time);
894 avio_printf(out, "\">\n");
896 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
899 for (i = 0; i < c->nb_as; i++) {
900 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
903 avio_printf(out, "\t</Period>\n");
905 if (c->utc_timing_url)
906 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
908 avio_printf(out, "</MPD>\n");
910 dashenc_io_close(s, &c->mpd_out, temp_filename);
913 if ((ret = avpriv_io_move(temp_filename, s->url)) < 0)
917 if (c->hls_playlist && !c->master_playlist_created) {
918 char filename_hls[1024];
919 const char *audio_group = "A1";
920 char audio_codec_str[128] = "\0";
922 int max_audio_bitrate = 0;
925 snprintf(filename_hls, sizeof(filename_hls), "%smaster.m3u8", c->dirname);
927 snprintf(filename_hls, sizeof(filename_hls), "master.m3u8");
929 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
931 set_http_options(&opts, c);
932 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename, &opts);
935 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
939 ff_hls_write_playlist_version(c->m3u8_out, 7);
941 for (i = 0; i < s->nb_streams; i++) {
942 char playlist_file[64];
943 AVStream *st = s->streams[i];
944 OutputStream *os = &c->streams[i];
945 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
947 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
948 ff_hls_write_audio_rendition(c->m3u8_out, (char *)audio_group,
949 playlist_file, i, is_default);
950 max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
951 os->muxer_overhead, max_audio_bitrate);
952 if (!av_strnstr(audio_codec_str, os->codec_str, sizeof(audio_codec_str))) {
953 if (strlen(audio_codec_str))
954 av_strlcat(audio_codec_str, ",", sizeof(audio_codec_str));
955 av_strlcat(audio_codec_str, os->codec_str, sizeof(audio_codec_str));
960 for (i = 0; i < s->nb_streams; i++) {
961 char playlist_file[64];
963 AVStream *st = s->streams[i];
964 OutputStream *os = &c->streams[i];
966 char *codec_str_ptr = NULL;
967 int stream_bitrate = st->codecpar->bit_rate + os->muxer_overhead;
968 if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
970 av_strlcpy(codec_str, os->codec_str, sizeof(codec_str));
971 if (max_audio_bitrate) {
972 agroup = (char *)audio_group;
973 stream_bitrate += max_audio_bitrate;
974 av_strlcat(codec_str, ",", sizeof(codec_str));
975 av_strlcat(codec_str, audio_codec_str, sizeof(codec_str));
977 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC) {
978 codec_str_ptr = codec_str;
980 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
981 ff_hls_write_stream_info(st, c->m3u8_out, stream_bitrate,
982 playlist_file, agroup,
983 codec_str_ptr, NULL);
985 dashenc_io_close(s, &c->m3u8_out, temp_filename);
987 if ((ret = avpriv_io_move(temp_filename, filename_hls)) < 0)
989 c->master_playlist_created = 1;
995 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
997 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
999 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
1003 static int dash_init(AVFormatContext *s)
1005 DASHContext *c = s->priv_data;
1008 char basename[1024];
1010 if (c->single_file_name)
1013 c->use_template = 0;
1015 #if FF_API_DASH_MIN_SEG_DURATION
1016 if (c->min_seg_duration != 5000000) {
1017 av_log(s, AV_LOG_WARNING, "The min_seg_duration option is deprecated and will be removed. Please use the -seg_duration\n");
1018 c->seg_duration = c->min_seg_duration;
1022 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
1023 ptr = strrchr(c->dirname, '/');
1025 av_strlcpy(basename, &ptr[1], sizeof(basename));
1028 c->dirname[0] = '\0';
1029 av_strlcpy(basename, s->url, sizeof(basename));
1032 ptr = strrchr(basename, '.');
1036 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
1038 return AVERROR(ENOMEM);
1040 if ((ret = parse_adaptation_sets(s)) < 0)
1043 if ((ret = init_segment_types(s)) < 0)
1046 for (i = 0; i < s->nb_streams; i++) {
1047 OutputStream *os = &c->streams[i];
1048 AdaptationSet *as = &c->as[os->as_idx - 1];
1049 AVFormatContext *ctx;
1051 AVDictionary *opts = NULL;
1052 char filename[1024];
1054 os->bit_rate = s->streams[i]->codecpar->bit_rate;
1055 if (!os->bit_rate) {
1056 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
1057 AV_LOG_ERROR : AV_LOG_WARNING;
1058 av_log(s, level, "No bit rate set for stream %d\n", i);
1059 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
1060 return AVERROR(EINVAL);
1063 // copy AdaptationSet language and role from stream metadata
1064 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
1065 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
1067 ctx = avformat_alloc_context();
1069 return AVERROR(ENOMEM);
1071 if (c->init_seg_name) {
1072 os->init_seg_name = av_strireplace(c->init_seg_name, "$ext$", os->format_name);
1073 if (!os->init_seg_name)
1074 return AVERROR(ENOMEM);
1076 if (c->media_seg_name) {
1077 os->media_seg_name = av_strireplace(c->media_seg_name, "$ext$", os->format_name);
1078 if (!os->media_seg_name)
1079 return AVERROR(ENOMEM);
1081 if (c->single_file_name) {
1082 os->single_file_name = av_strireplace(c->single_file_name, "$ext$", os->format_name);
1083 if (!os->single_file_name)
1084 return AVERROR(ENOMEM);
1087 if (os->segment_type == SEGMENT_TYPE_WEBM) {
1088 if ((!c->single_file && check_file_extension(os->init_seg_name, os->format_name) != 0) ||
1089 (!c->single_file && check_file_extension(os->media_seg_name, os->format_name) != 0) ||
1090 (c->single_file && check_file_extension(os->single_file_name, os->format_name) != 0)) {
1091 av_log(s, AV_LOG_WARNING,
1092 "One or many segment file names doesn't end with .webm. "
1093 "Override -init_seg_name and/or -media_seg_name and/or "
1094 "-single_file_name to end with the extension .webm\n");
1098 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
1100 return AVERROR_MUXER_NOT_FOUND;
1102 ctx->interrupt_callback = s->interrupt_callback;
1103 ctx->opaque = s->opaque;
1104 ctx->io_close = s->io_close;
1105 ctx->io_open = s->io_open;
1106 ctx->strict_std_compliance = s->strict_std_compliance;
1108 if (!(st = avformat_new_stream(ctx, NULL)))
1109 return AVERROR(ENOMEM);
1110 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
1111 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
1112 st->time_base = s->streams[i]->time_base;
1113 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
1114 ctx->avoid_negative_ts = s->avoid_negative_ts;
1115 ctx->flags = s->flags;
1117 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
1120 if (c->single_file) {
1121 if (os->single_file_name)
1122 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->single_file_name, i, 0, os->bit_rate, 0);
1124 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.%s", basename, i, os->format_name);
1126 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->init_seg_name, i, 0, os->bit_rate, 0);
1128 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1129 set_http_options(&opts, c);
1130 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
1131 av_dict_free(&opts);
1134 os->init_start_pos = 0;
1136 if (c->format_options_str) {
1137 ret = av_dict_parse_string(&opts, c->format_options_str, "=", ":", 0);
1142 if (os->segment_type == SEGMENT_TYPE_MP4) {
1144 av_dict_set(&opts, "movflags", "frag_every_frame+dash+delay_moov+global_sidx", 0);
1146 av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov", 0);
1148 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
1149 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
1150 av_dict_set_int(&opts, "dash", 1, 0);
1151 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
1152 av_dict_set_int(&opts, "live", 1, 0);
1154 ret = avformat_init_output(ctx, &opts);
1155 av_dict_free(&opts);
1159 avio_flush(ctx->pb);
1161 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1163 s->streams[i]->time_base = st->time_base;
1164 // If the muxer wants to shift timestamps, request to have them shifted
1165 // already before being handed to this muxer, so we don't have mismatches
1166 // between the MPD and the actual segments.
1167 s->avoid_negative_ts = ctx->avoid_negative_ts;
1168 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1169 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1170 if (avg_frame_rate.num > 0) {
1171 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1172 as->min_frame_rate = avg_frame_rate;
1173 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1174 as->max_frame_rate = avg_frame_rate;
1176 as->ambiguous_frame_rate = 1;
1181 set_codec_str(s, st->codecpar, &st->avg_frame_rate, os->codec_str,
1182 sizeof(os->codec_str));
1183 os->first_pts = AV_NOPTS_VALUE;
1184 os->max_pts = AV_NOPTS_VALUE;
1185 os->last_dts = AV_NOPTS_VALUE;
1186 os->segment_index = 1;
1189 if (!c->has_video && c->seg_duration <= 0) {
1190 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1191 return AVERROR(EINVAL);
1196 static int dash_write_header(AVFormatContext *s)
1198 DASHContext *c = s->priv_data;
1200 for (i = 0; i < s->nb_streams; i++) {
1201 OutputStream *os = &c->streams[i];
1202 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1205 // Flush init segment
1206 // Only for WebM segment, since for mp4 delay_moov is set and
1207 // the init segment is thus flushed after the first packets.
1208 if (os->segment_type == SEGMENT_TYPE_WEBM &&
1209 (ret = flush_init_segment(s, os)) < 0)
1215 static int add_segment(OutputStream *os, const char *file,
1216 int64_t time, int64_t duration,
1217 int64_t start_pos, int64_t range_length,
1218 int64_t index_length, int next_exp_index)
1222 if (os->nb_segments >= os->segments_size) {
1223 os->segments_size = (os->segments_size + 1) * 2;
1224 if ((err = av_reallocp(&os->segments, sizeof(*os->segments) *
1225 os->segments_size)) < 0) {
1226 os->segments_size = 0;
1227 os->nb_segments = 0;
1231 seg = av_mallocz(sizeof(*seg));
1233 return AVERROR(ENOMEM);
1234 av_strlcpy(seg->file, file, sizeof(seg->file));
1236 seg->duration = duration;
1237 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1238 seg->duration += seg->time;
1241 seg->start_pos = start_pos;
1242 seg->range_length = range_length;
1243 seg->index_length = index_length;
1244 os->segments[os->nb_segments++] = seg;
1245 os->segment_index++;
1246 //correcting the segment index if it has fallen behind the expected value
1247 if (os->segment_index < next_exp_index) {
1248 av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n",
1249 file, os->segment_index, next_exp_index);
1250 os->segment_index = next_exp_index;
1255 static void write_styp(AVIOContext *pb)
1258 ffio_wfourcc(pb, "styp");
1259 ffio_wfourcc(pb, "msdh");
1260 avio_wb32(pb, 0); /* minor */
1261 ffio_wfourcc(pb, "msdh");
1262 ffio_wfourcc(pb, "msix");
1265 static void find_index_range(AVFormatContext *s, const char *full_path,
1266 int64_t pos, int *index_length)
1272 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1275 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1276 ff_format_io_close(s, &pb);
1279 ret = avio_read(pb, buf, 8);
1280 ff_format_io_close(s, &pb);
1283 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1285 *index_length = AV_RB32(&buf[0]);
1288 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1289 AVCodecParameters *par,
1290 AVRational *frame_rate)
1294 if (os->ctx->streams[0]->codecpar->extradata_size || !par->extradata_size)
1297 extradata = av_malloc(par->extradata_size);
1300 return AVERROR(ENOMEM);
1302 memcpy(extradata, par->extradata, par->extradata_size);
1304 os->ctx->streams[0]->codecpar->extradata = extradata;
1305 os->ctx->streams[0]->codecpar->extradata_size = par->extradata_size;
1307 set_codec_str(s, par, frame_rate, os->codec_str, sizeof(os->codec_str));
1312 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1313 DASHContext *c = s->priv_data;
1314 int http_base_proto = ff_is_http_proto(filename);
1316 if (http_base_proto) {
1317 AVIOContext *out = NULL;
1318 AVDictionary *http_opts = NULL;
1320 set_http_options(&http_opts, c);
1321 av_dict_set(&http_opts, "method", "DELETE", 0);
1323 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1324 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1327 av_dict_free(&http_opts);
1328 ff_format_io_close(s, &out);
1329 } else if (unlink(filename) < 0) {
1330 av_log(s, AV_LOG_ERROR, "failed to delete %s: %s\n", filename, strerror(errno));
1334 static int dash_flush(AVFormatContext *s, int final, int stream)
1336 DASHContext *c = s->priv_data;
1339 const char *proto = avio_find_protocol_name(s->url);
1340 int use_rename = proto && !strcmp(proto, "file");
1342 int cur_flush_segment_index = 0, next_exp_index = -1;
1344 cur_flush_segment_index = c->streams[stream].segment_index;
1346 //finding the next segment's expected index, based on the current pts value
1347 if (c->use_template && !c->use_timeline && c->index_correction &&
1348 c->streams[stream].last_pts != AV_NOPTS_VALUE &&
1349 c->streams[stream].first_pts != AV_NOPTS_VALUE) {
1350 int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts -
1351 c->streams[stream].first_pts,
1352 s->streams[stream]->time_base,
1354 next_exp_index = (pts_diff / c->seg_duration) + 1;
1358 for (i = 0; i < s->nb_streams; i++) {
1359 OutputStream *os = &c->streams[i];
1360 AVStream *st = s->streams[i];
1361 int range_length, index_length = 0;
1363 if (!os->packets_written)
1366 // Flush the single stream that got a keyframe right now.
1367 // Flush all audio streams as well, in sync with video keyframes,
1368 // but not the other video streams.
1369 if (stream >= 0 && i != stream) {
1370 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1372 // Make sure we don't flush audio streams multiple times, when
1373 // all video streams are flushed one at a time.
1374 if (c->has_video && os->segment_index > cur_flush_segment_index)
1378 if (!c->single_file) {
1379 if (os->segment_type == SEGMENT_TYPE_MP4 && !os->written_len)
1380 write_styp(os->ctx->pb);
1382 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1385 ret = flush_dynbuf(os, &range_length);
1388 os->packets_written = 0;
1390 if (c->single_file) {
1391 find_index_range(s, os->full_path, os->pos, &index_length);
1393 dashenc_io_close(s, &os->out, os->temp_path);
1396 ret = avpriv_io_move(os->temp_path, os->full_path);
1402 if (!os->muxer_overhead)
1403 os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1405 av_rescale_q(os->max_pts - os->start_pts,
1406 st->time_base, AV_TIME_BASE_Q);
1407 os->total_pkt_size = 0;
1409 if (!os->bit_rate) {
1410 // calculate average bitrate of first segment
1411 int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / av_rescale_q(os->max_pts - os->start_pts,
1415 os->bit_rate = bitrate;
1417 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index);
1418 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1420 os->pos += range_length;
1423 if (c->window_size || (final && c->remove_at_exit)) {
1424 for (i = 0; i < s->nb_streams; i++) {
1425 OutputStream *os = &c->streams[i];
1427 int remove = os->nb_segments - c->window_size - c->extra_window_size;
1428 if (final && c->remove_at_exit)
1429 remove = os->nb_segments;
1431 for (j = 0; j < remove; j++) {
1432 char filename[1024];
1433 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->segments[j]->file);
1434 dashenc_delete_file(s, filename);
1435 av_free(os->segments[j]);
1437 os->nb_segments -= remove;
1438 memmove(os->segments, os->segments + remove, os->nb_segments * sizeof(*os->segments));
1444 ret = write_manifest(s, final);
1448 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
1450 DASHContext *c = s->priv_data;
1451 AVStream *st = s->streams[pkt->stream_index];
1452 OutputStream *os = &c->streams[pkt->stream_index];
1453 int64_t seg_end_duration, elapsed_duration;
1456 ret = update_stream_extradata(s, os, st->codecpar, &st->avg_frame_rate);
1460 // Fill in a heuristic guess of the packet duration, if none is available.
1461 // The mp4 muxer will do something similar (for the last packet in a fragment)
1462 // if nothing is set (setting it for the other packets doesn't hurt).
1463 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
1464 // invoke its heuristic (this doesn't have to be identical to that algorithm),
1465 // so that we know the exact timestamps of fragments.
1466 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
1467 pkt->duration = pkt->dts - os->last_dts;
1468 os->last_dts = pkt->dts;
1470 // If forcing the stream to start at 0, the mp4 muxer will set the start
1471 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
1472 if (os->first_pts == AV_NOPTS_VALUE &&
1473 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
1474 pkt->pts -= pkt->dts;
1478 if (os->first_pts == AV_NOPTS_VALUE)
1479 os->first_pts = pkt->pts;
1480 os->last_pts = pkt->pts;
1482 if (!c->availability_start_time[0])
1483 format_date_now(c->availability_start_time,
1484 sizeof(c->availability_start_time));
1486 if (!os->availability_time_offset && pkt->duration) {
1487 int64_t frame_duration = av_rescale_q(pkt->duration, st->time_base,
1489 os->availability_time_offset = ((double) c->seg_duration -
1490 frame_duration) / AV_TIME_BASE;
1493 if (c->use_template && !c->use_timeline) {
1494 elapsed_duration = pkt->pts - os->first_pts;
1495 seg_end_duration = (int64_t) os->segment_index * c->seg_duration;
1497 elapsed_duration = pkt->pts - os->start_pts;
1498 seg_end_duration = c->seg_duration;
1501 if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1502 pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
1503 av_compare_ts(elapsed_duration, st->time_base,
1504 seg_end_duration, AV_TIME_BASE_Q) >= 0) {
1505 int64_t prev_duration = c->last_duration;
1507 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
1510 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
1514 if ((!c->use_timeline || !c->use_template) && prev_duration) {
1515 if (c->last_duration < prev_duration*9/10 ||
1516 c->last_duration > prev_duration*11/10) {
1517 av_log(s, AV_LOG_WARNING,
1518 "Segment durations differ too much, enable use_timeline "
1519 "and use_template, or keep a stricter keyframe interval\n");
1523 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
1527 if (!os->packets_written) {
1528 // If we wrote a previous segment, adjust the start time of the segment
1529 // to the end of the previous one (which is the same as the mp4 muxer
1530 // does). This avoids gaps in the timeline.
1531 if (os->max_pts != AV_NOPTS_VALUE)
1532 os->start_pts = os->max_pts;
1534 os->start_pts = pkt->pts;
1536 if (os->max_pts == AV_NOPTS_VALUE)
1537 os->max_pts = pkt->pts + pkt->duration;
1539 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
1540 os->packets_written++;
1541 os->total_pkt_size += pkt->size;
1542 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
1545 if (!os->init_range_length)
1546 flush_init_segment(s, os);
1548 //open the output context when the first frame of a segment is ready
1549 if (!c->single_file && os->packets_written == 1) {
1550 AVDictionary *opts = NULL;
1551 const char *proto = avio_find_protocol_name(s->url);
1552 int use_rename = proto && !strcmp(proto, "file");
1553 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
1554 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
1555 os->media_seg_name, pkt->stream_index,
1556 os->segment_index, os->bit_rate, os->start_pts);
1557 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
1559 snprintf(os->temp_path, sizeof(os->temp_path),
1560 use_rename ? "%s.tmp" : "%s", os->full_path);
1561 set_http_options(&opts, c);
1562 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
1563 av_dict_free(&opts);
1568 //write out the data immediately in streaming mode
1569 if (c->streaming && os->segment_type == SEGMENT_TYPE_MP4) {
1571 uint8_t *buf = NULL;
1572 if (!os->written_len)
1573 write_styp(os->ctx->pb);
1574 avio_flush(os->ctx->pb);
1575 len = avio_get_dyn_buf (os->ctx->pb, &buf);
1576 avio_write(os->out, buf + os->written_len, len - os->written_len);
1577 os->written_len = len;
1578 avio_flush(os->out);
1584 static int dash_write_trailer(AVFormatContext *s)
1586 DASHContext *c = s->priv_data;
1588 if (s->nb_streams > 0) {
1589 OutputStream *os = &c->streams[0];
1590 // If no segments have been written so far, try to do a crude
1591 // guess of the segment duration
1592 if (!c->last_duration)
1593 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
1594 s->streams[0]->time_base,
1596 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
1597 s->streams[0]->time_base,
1600 dash_flush(s, 1, -1);
1602 if (c->remove_at_exit) {
1603 char filename[1024];
1605 for (i = 0; i < s->nb_streams; i++) {
1606 OutputStream *os = &c->streams[i];
1607 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1608 dashenc_delete_file(s, filename);
1610 dashenc_delete_file(s, s->url);
1616 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
1618 DASHContext *c = s->priv_data;
1619 OutputStream *os = &c->streams[avpkt->stream_index];
1620 AVFormatContext *oc = os->ctx;
1621 if (oc->oformat->check_bitstream) {
1623 AVPacket pkt = *avpkt;
1624 pkt.stream_index = 0;
1625 ret = oc->oformat->check_bitstream(oc, &pkt);
1627 AVStream *st = s->streams[avpkt->stream_index];
1628 AVStream *ost = oc->streams[0];
1629 st->internal->bsfcs = ost->internal->bsfcs;
1630 st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1631 ost->internal->bsfcs = NULL;
1632 ost->internal->nb_bsfcs = 0;
1639 #define OFFSET(x) offsetof(DASHContext, x)
1640 #define E AV_OPT_FLAG_ENCODING_PARAM
1641 static const AVOption options[] = {
1642 { "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 },
1643 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
1644 { "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 },
1645 #if FF_API_DASH_MIN_SEG_DURATION
1646 { "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 },
1648 { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
1649 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1650 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1651 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1652 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1653 { "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 },
1654 { "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 },
1655 { "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 },
1656 { "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 },
1657 { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1658 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1659 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1660 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1661 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1662 { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
1663 { "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1664 { "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},
1665 { "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"},
1666 { "auto", "select segment file format based on codec", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_AUTO }, 0, UINT_MAX, E, "segment_type"},
1667 { "mp4", "make segment file in ISOBMFF format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MP4 }, 0, UINT_MAX, E, "segment_type"},
1668 { "webm", "make segment file in WebM format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_WEBM }, 0, UINT_MAX, E, "segment_type"},
1672 static const AVClass dash_class = {
1673 .class_name = "dash muxer",
1674 .item_name = av_default_item_name,
1676 .version = LIBAVUTIL_VERSION_INT,
1679 AVOutputFormat ff_dash_muxer = {
1681 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
1682 .extensions = "mpd",
1683 .priv_data_size = sizeof(DASHContext),
1684 .audio_codec = AV_CODEC_ID_AAC,
1685 .video_codec = AV_CODEC_ID_H264,
1686 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
1688 .write_header = dash_write_header,
1689 .write_packet = dash_write_packet,
1690 .write_trailer = dash_write_trailer,
1691 .deinit = dash_free,
1692 .check_bitstream = dash_check_bitstream,
1693 .priv_class = &dash_class,