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;
68 typedef struct AdaptationSet {
70 enum AVMediaType media_type;
71 AVDictionary *metadata;
72 AVRational min_frame_rate, max_frame_rate;
73 int ambiguous_frame_rate;
76 typedef struct OutputStream {
78 int ctx_inited, as_idx;
82 int64_t init_start_pos, pos;
83 int init_range_length;
84 int nb_segments, segments_size, segment_index;
86 int64_t first_pts, start_pts, max_pts;
87 int64_t last_dts, last_pts;
89 SegmentType segment_type; /* segment type selected for this particular stream */
90 const char *format_name;
91 const char *single_file_name; /* file names selected for this particular stream */
92 const char *init_seg_name;
93 const char *media_seg_name;
100 double availability_time_offset;
105 typedef struct DASHContext {
106 const AVClass *class; /* Class for private options. */
107 char *adaptation_sets;
111 int extra_window_size;
112 #if FF_API_DASH_MIN_SEG_DURATION
113 int min_seg_duration;
115 int64_t seg_duration;
120 OutputStream *streams;
122 int64_t last_duration;
123 int64_t total_duration;
124 char availability_start_time[100];
126 const char *single_file_name; /* file names as specified in options */
127 const char *init_seg_name;
128 const char *media_seg_name;
129 const char *utc_timing_url;
131 const char *user_agent;
134 int master_playlist_created;
135 AVIOContext *mpd_out;
136 AVIOContext *m3u8_out;
139 int index_correction;
140 char *format_options_str;
141 SegmentType segment_type_option; /* segment type as specified in options */
142 int ignore_io_errors;
144 int master_publish_rate;
147 static struct codec_string {
151 { AV_CODEC_ID_VP8, "vp8" },
152 { AV_CODEC_ID_VP9, "vp9" },
153 { AV_CODEC_ID_VORBIS, "vorbis" },
154 { AV_CODEC_ID_OPUS, "opus" },
155 { AV_CODEC_ID_FLAC, "flac" },
159 static struct format_string {
160 SegmentType segment_type;
163 { SEGMENT_TYPE_AUTO, "auto" },
164 { SEGMENT_TYPE_MP4, "mp4" },
165 { SEGMENT_TYPE_WEBM, "webm" },
169 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
170 AVDictionary **options) {
171 DASHContext *c = s->priv_data;
172 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
173 int err = AVERROR_MUXER_NOT_FOUND;
174 if (!*pb || !http_base_proto || !c->http_persistent) {
175 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
176 #if CONFIG_HTTP_PROTOCOL
178 URLContext *http_url_context = ffio_geturlcontext(*pb);
179 av_assert0(http_url_context);
180 err = ff_http_do_new_request(http_url_context, filename);
182 ff_format_io_close(s, pb);
188 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
189 DASHContext *c = s->priv_data;
190 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
195 if (!http_base_proto || !c->http_persistent) {
196 ff_format_io_close(s, pb);
197 #if CONFIG_HTTP_PROTOCOL
199 URLContext *http_url_context = ffio_geturlcontext(*pb);
200 av_assert0(http_url_context);
202 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
207 static const char *get_format_str(SegmentType segment_type) {
209 for (i = 0; i < SEGMENT_TYPE_NB; i++)
210 if (formats[i].segment_type == segment_type)
211 return formats[i].str;
215 static int handle_io_open_error(AVFormatContext *s, int err, char *url) {
216 DASHContext *c = s->priv_data;
217 char errbuf[AV_ERROR_MAX_STRING_SIZE];
218 av_strerror(err, errbuf, sizeof(errbuf));
219 av_log(s, c->ignore_io_errors ? AV_LOG_WARNING : AV_LOG_ERROR,
220 "Unable to open %s for writing: %s\n", url, errbuf);
221 return c->ignore_io_errors ? 0 : err;
224 static inline SegmentType select_segment_type(SegmentType segment_type, enum AVCodecID codec_id)
226 if (segment_type == SEGMENT_TYPE_AUTO) {
227 if (codec_id == AV_CODEC_ID_OPUS || codec_id == AV_CODEC_ID_VORBIS ||
228 codec_id == AV_CODEC_ID_VP8 || codec_id == AV_CODEC_ID_VP9) {
229 segment_type = SEGMENT_TYPE_WEBM;
231 segment_type = SEGMENT_TYPE_MP4;
238 static int init_segment_types(AVFormatContext *s)
240 DASHContext *c = s->priv_data;
241 int has_mp4_streams = 0;
242 for (int i = 0; i < s->nb_streams; ++i) {
243 OutputStream *os = &c->streams[i];
244 SegmentType segment_type = select_segment_type(
245 c->segment_type_option, s->streams[i]->codecpar->codec_id);
246 os->segment_type = segment_type;
247 os->format_name = get_format_str(segment_type);
248 if (!os->format_name) {
249 av_log(s, AV_LOG_ERROR, "Could not select DASH segment type for stream %d\n", i);
250 return AVERROR_MUXER_NOT_FOUND;
252 has_mp4_streams |= segment_type == SEGMENT_TYPE_MP4;
255 if (c->hls_playlist && !has_mp4_streams) {
256 av_log(s, AV_LOG_WARNING, "No mp4 streams, disabling HLS manifest generation\n");
263 static int check_file_extension(const char *filename, const char *extension) {
265 if (!filename || !extension)
267 dot = strrchr(filename, '.');
268 if (dot && !strcmp(dot + 1, extension))
273 static void set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par,
274 AVRational *frame_rate, char *str, int size) {
276 int ret = ff_isom_get_vpcc_features(s, par, frame_rate, &vpcc);
278 av_strlcatf(str, size, "vp09.%02d.%02d.%02d",
279 vpcc.profile, vpcc.level, vpcc.bitdepth);
281 // Default to just vp9 in case of error while finding out profile or level
282 av_log(s, AV_LOG_WARNING, "Could not find VP9 profile and/or level\n");
283 av_strlcpy(str, "vp9", size);
288 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
289 AVRational *frame_rate, char *str, int size)
291 const AVCodecTag *tags[2] = { NULL, NULL };
295 // common Webm codecs are not part of RFC 6381
296 for (i = 0; codecs[i].id; i++)
297 if (codecs[i].id == par->codec_id) {
298 if (codecs[i].id == AV_CODEC_ID_VP9) {
299 set_vp9_codec_str(s, par, frame_rate, str, size);
301 av_strlcpy(str, codecs[i].str, size);
306 // for codecs part of RFC 6381
307 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
308 tags[0] = ff_codec_movvideo_tags;
309 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
310 tags[0] = ff_codec_movaudio_tags;
314 tag = par->codec_tag;
316 tag = av_codec_get_tag(tags, par->codec_id);
324 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
326 tags[0] = ff_mp4_obj_type;
327 oti = av_codec_get_tag(tags, par->codec_id);
329 av_strlcatf(str, size, ".%02"PRIx32, oti);
333 if (tag == MKTAG('m', 'p', '4', 'a')) {
334 if (par->extradata_size >= 2) {
335 int aot = par->extradata[0] >> 3;
337 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
338 av_strlcatf(str, size, ".%d", aot);
340 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
341 // Unimplemented, should output ProfileLevelIndication as a decimal number
342 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
344 } else if (!strcmp(str, "avc1")) {
345 uint8_t *tmpbuf = NULL;
346 uint8_t *extradata = par->extradata;
347 int extradata_size = par->extradata_size;
350 if (extradata[0] != 1) {
352 if (avio_open_dyn_buf(&pb) < 0)
354 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
355 ffio_free_dyn_buf(&pb);
358 extradata_size = avio_close_dyn_buf(pb, &extradata);
362 if (extradata_size >= 4)
363 av_strlcatf(str, size, ".%02x%02x%02x",
364 extradata[1], extradata[2], extradata[3]);
369 static int flush_dynbuf(OutputStream *os, int *range_length)
374 return AVERROR(EINVAL);
378 av_write_frame(os->ctx, NULL);
379 avio_flush(os->ctx->pb);
382 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
385 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
390 return avio_open_dyn_buf(&os->ctx->pb);
393 static void set_http_options(AVDictionary **options, DASHContext *c)
396 av_dict_set(options, "method", c->method, 0);
398 av_dict_set(options, "user_agent", c->user_agent, 0);
399 if (c->http_persistent)
400 av_dict_set_int(options, "multiple_requests", 1, 0);
402 av_dict_set_int(options, "timeout", c->timeout, 0);
405 static void get_hls_playlist_name(char *playlist_name, int string_size,
406 const char *base_url, int id) {
408 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
410 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
413 static void get_start_index_number(OutputStream *os, DASHContext *c,
414 int *start_index, int *start_number) {
417 if (c->window_size) {
418 *start_index = FFMAX(os->nb_segments - c->window_size, 0);
419 *start_number = FFMAX(os->segment_index - c->window_size, 1);
423 static void write_hls_media_playlist(OutputStream *os, AVFormatContext *s,
424 int representation_id, int final,
425 char *prefetch_url) {
426 DASHContext *c = s->priv_data;
427 int timescale = os->ctx->streams[0]->time_base.den;
428 char temp_filename_hls[1024];
429 char filename_hls[1024];
430 AVDictionary *http_opts = NULL;
431 int target_duration = 0;
433 const char *proto = avio_find_protocol_name(c->dirname);
434 int use_rename = proto && !strcmp(proto, "file");
435 int i, start_index, start_number;
437 get_start_index_number(os, c, &start_index, &start_number);
439 if (!c->hls_playlist || start_index >= os->nb_segments ||
440 os->segment_type != SEGMENT_TYPE_MP4)
443 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
444 c->dirname, representation_id);
446 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
448 set_http_options(&http_opts, c);
449 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
450 av_dict_free(&http_opts);
452 handle_io_open_error(s, ret, temp_filename_hls);
455 for (i = start_index; i < os->nb_segments; i++) {
456 Segment *seg = os->segments[i];
457 double duration = (double) seg->duration / timescale;
458 if (target_duration <= duration)
459 target_duration = lrint(duration);
462 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
463 start_number, PLAYLIST_TYPE_NONE);
465 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
466 os->init_range_length, os->init_start_pos);
468 for (i = start_index; i < os->nb_segments; i++) {
469 Segment *seg = os->segments[i];
470 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
471 (double) seg->duration / timescale, 0,
472 seg->range_length, seg->start_pos, NULL,
473 c->single_file ? os->initfile : seg->file,
476 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
481 avio_printf(c->m3u8_out, "#EXT-X-PREFETCH:%s\n", prefetch_url);
484 ff_hls_write_end_list(c->m3u8_out);
486 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
489 if (avpriv_io_move(temp_filename_hls, filename_hls) < 0) {
490 av_log(os->ctx, AV_LOG_WARNING, "renaming file %s to %s failed\n\n", temp_filename_hls, filename_hls);
494 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
496 DASHContext *c = s->priv_data;
497 int ret, range_length;
499 ret = flush_dynbuf(os, &range_length);
503 os->pos = os->init_range_length = range_length;
504 if (!c->single_file) {
506 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
507 dashenc_io_close(s, &os->out, filename);
512 static void dash_free(AVFormatContext *s)
514 DASHContext *c = s->priv_data;
518 for (i = 0; i < c->nb_as; i++)
519 av_dict_free(&c->as[i].metadata);
526 for (i = 0; i < s->nb_streams; i++) {
527 OutputStream *os = &c->streams[i];
528 if (os->ctx && os->ctx->pb)
529 ffio_free_dyn_buf(&os->ctx->pb);
530 ff_format_io_close(s, &os->out);
532 avformat_free_context(os->ctx);
533 for (j = 0; j < os->nb_segments; j++)
534 av_free(os->segments[j]);
535 av_free(os->segments);
536 av_freep(&os->single_file_name);
537 av_freep(&os->init_seg_name);
538 av_freep(&os->media_seg_name);
540 av_freep(&c->streams);
542 ff_format_io_close(s, &c->mpd_out);
543 ff_format_io_close(s, &c->m3u8_out);
546 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
547 int representation_id, int final)
549 DASHContext *c = s->priv_data;
550 int i, start_index, start_number;
551 get_start_index_number(os, c, &start_index, &start_number);
553 if (c->use_template) {
554 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
555 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
556 if (!c->use_timeline) {
557 avio_printf(out, "duration=\"%"PRId64"\" ", c->seg_duration);
558 if (c->streaming && os->availability_time_offset)
559 avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
560 os->availability_time_offset);
562 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", os->init_seg_name, os->media_seg_name, c->use_timeline ? start_number : 1);
563 if (c->use_timeline) {
564 int64_t cur_time = 0;
565 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
566 for (i = start_index; i < os->nb_segments; ) {
567 Segment *seg = os->segments[i];
569 avio_printf(out, "\t\t\t\t\t\t<S ");
570 if (i == start_index || seg->time != cur_time) {
571 cur_time = seg->time;
572 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
574 avio_printf(out, "d=\"%"PRId64"\" ", seg->duration);
575 while (i + repeat + 1 < os->nb_segments &&
576 os->segments[i + repeat + 1]->duration == seg->duration &&
577 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
580 avio_printf(out, "r=\"%d\" ", repeat);
581 avio_printf(out, "/>\n");
583 cur_time += (1 + repeat) * seg->duration;
585 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
587 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
588 } else if (c->single_file) {
589 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
590 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
591 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);
592 for (i = start_index; i < os->nb_segments; i++) {
593 Segment *seg = os->segments[i];
594 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
595 if (seg->index_length)
596 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
597 avio_printf(out, "/>\n");
599 avio_printf(out, "\t\t\t\t</SegmentList>\n");
601 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
602 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
603 for (i = start_index; i < os->nb_segments; i++) {
604 Segment *seg = os->segments[i];
605 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
607 avio_printf(out, "\t\t\t\t</SegmentList>\n");
609 if (!c->lhls || final) {
610 write_hls_media_playlist(os, s, representation_id, final, NULL);
615 static char *xmlescape(const char *str) {
616 int outlen = strlen(str)*3/2 + 6;
617 char *out = av_realloc(NULL, outlen + 1);
621 for (; *str; str++) {
622 if (pos + 6 > outlen) {
624 outlen = 2 * outlen + 6;
625 tmp = av_realloc(out, outlen + 1);
633 memcpy(&out[pos], "&", 5);
635 } else if (*str == '<') {
636 memcpy(&out[pos], "<", 4);
638 } else if (*str == '>') {
639 memcpy(&out[pos], ">", 4);
641 } else if (*str == '\'') {
642 memcpy(&out[pos], "'", 6);
644 } else if (*str == '\"') {
645 memcpy(&out[pos], """, 6);
655 static void write_time(AVIOContext *out, int64_t time)
657 int seconds = time / AV_TIME_BASE;
658 int fractions = time % AV_TIME_BASE;
659 int minutes = seconds / 60;
660 int hours = minutes / 60;
663 avio_printf(out, "PT");
665 avio_printf(out, "%dH", hours);
666 if (hours || minutes)
667 avio_printf(out, "%dM", minutes);
668 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
671 static void format_date_now(char *buf, int size)
673 struct tm *ptm, tmbuf;
674 int64_t time_us = av_gettime();
675 int64_t time_ms = time_us / 1000;
676 const time_t time_s = time_ms / 1000;
677 int millisec = time_ms - (time_s * 1000);
678 ptm = gmtime_r(&time_s, &tmbuf);
681 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%S", ptm)) {
686 snprintf(buf + len, size - len, ".%03dZ", millisec);
690 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
693 DASHContext *c = s->priv_data;
694 AdaptationSet *as = &c->as[as_index];
695 AVDictionaryEntry *lang, *role;
698 avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
699 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
700 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)
701 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
702 lang = av_dict_get(as->metadata, "language", NULL, 0);
704 avio_printf(out, " lang=\"%s\"", lang->value);
705 avio_printf(out, ">\n");
707 role = av_dict_get(as->metadata, "role", NULL, 0);
709 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
711 for (i = 0; i < s->nb_streams; i++) {
712 OutputStream *os = &c->streams[i];
713 char bandwidth_str[64] = {'\0'};
715 if (os->as_idx - 1 != as_index)
718 if (os->bit_rate > 0)
719 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"",
722 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
723 AVStream *st = s->streams[i];
724 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
725 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
726 if (st->avg_frame_rate.num)
727 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
728 avio_printf(out, ">\n");
730 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
731 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
732 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
733 s->streams[i]->codecpar->channels);
735 output_segment_list(os, out, s, i, final);
736 avio_printf(out, "\t\t\t</Representation>\n");
738 avio_printf(out, "\t\t</AdaptationSet>\n");
743 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
745 DASHContext *c = s->priv_data;
747 void *mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
749 return AVERROR(ENOMEM);
753 *as = &c->as[c->nb_as - 1];
754 memset(*as, 0, sizeof(**as));
755 (*as)->media_type = type;
760 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
762 DASHContext *c = s->priv_data;
763 AdaptationSet *as = &c->as[as_idx - 1];
764 OutputStream *os = &c->streams[i];
766 if (as->media_type != s->streams[i]->codecpar->codec_type) {
767 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
768 return AVERROR(EINVAL);
769 } else if (os->as_idx) {
770 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
771 return AVERROR(EINVAL);
778 static int parse_adaptation_sets(AVFormatContext *s)
780 DASHContext *c = s->priv_data;
781 const char *p = c->adaptation_sets;
782 enum { new_set, parse_id, parsing_streams } state;
786 // default: one AdaptationSet for each stream
788 for (i = 0; i < s->nb_streams; i++) {
789 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
791 snprintf(as->id, sizeof(as->id), "%d", i);
793 c->streams[i].as_idx = c->nb_as;
798 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
804 } else if (state == new_set && av_strstart(p, "id=", &p)) {
806 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
810 snprintf(as->id, sizeof(as->id), "%.*s", n, p);
816 } else if (state == parse_id && av_strstart(p, "streams=", &p)) {
817 state = parsing_streams;
818 } else if (state == parsing_streams) {
819 AdaptationSet *as = &c->as[c->nb_as - 1];
820 char idx_str[8], *end_str;
822 n = strcspn(p, " ,");
823 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
826 // if value is "a" or "v", map all streams of that type
827 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
828 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
829 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
831 for (i = 0; i < s->nb_streams; i++) {
832 if (s->streams[i]->codecpar->codec_type != type)
835 as->media_type = s->streams[i]->codecpar->codec_type;
837 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
840 } else { // select single stream
841 i = strtol(idx_str, &end_str, 10);
842 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
843 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
844 return AVERROR(EINVAL);
846 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
848 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
849 as->media_type = s->streams[i]->codecpar->codec_type;
852 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
861 return AVERROR(EINVAL);
866 // check for unassigned streams
867 for (i = 0; i < s->nb_streams; i++) {
868 OutputStream *os = &c->streams[i];
870 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
871 return AVERROR(EINVAL);
877 static int write_manifest(AVFormatContext *s, int final)
879 DASHContext *c = s->priv_data;
881 char temp_filename[1024];
883 const char *proto = avio_find_protocol_name(s->url);
884 int use_rename = proto && !strcmp(proto, "file");
885 static unsigned int warned_non_file = 0;
886 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
887 AVDictionary *opts = NULL;
889 if (!use_rename && !warned_non_file++)
890 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
892 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
893 set_http_options(&opts, c);
894 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
897 return handle_io_open_error(s, ret, temp_filename);
900 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
901 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
902 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
903 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
904 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
905 "\tprofiles=\"urn:mpeg:dash:profile:isoff-live:2011\"\n"
906 "\ttype=\"%s\"\n", final ? "static" : "dynamic");
908 avio_printf(out, "\tmediaPresentationDuration=\"");
909 write_time(out, c->total_duration);
910 avio_printf(out, "\"\n");
912 int64_t update_period = c->last_duration / AV_TIME_BASE;
914 if (c->use_template && !c->use_timeline)
916 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
917 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
918 if (c->availability_start_time[0])
919 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
920 format_date_now(now_str, sizeof(now_str));
922 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
923 if (c->window_size && c->use_template) {
924 avio_printf(out, "\ttimeShiftBufferDepth=\"");
925 write_time(out, c->last_duration * c->window_size);
926 avio_printf(out, "\"\n");
929 avio_printf(out, "\tminBufferTime=\"");
930 write_time(out, c->last_duration * 2);
931 avio_printf(out, "\">\n");
932 avio_printf(out, "\t<ProgramInformation>\n");
934 char *escaped = xmlescape(title->value);
935 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
938 avio_printf(out, "\t</ProgramInformation>\n");
940 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
941 OutputStream *os = &c->streams[0];
942 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
943 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
944 avio_printf(out, "\t<Period id=\"0\" start=\"");
945 write_time(out, start_time);
946 avio_printf(out, "\">\n");
948 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
951 for (i = 0; i < c->nb_as; i++) {
952 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
955 avio_printf(out, "\t</Period>\n");
957 if (c->utc_timing_url)
958 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
960 avio_printf(out, "</MPD>\n");
962 dashenc_io_close(s, &c->mpd_out, temp_filename);
965 if ((ret = avpriv_io_move(temp_filename, s->url)) < 0)
969 if (c->hls_playlist) {
970 char filename_hls[1024];
971 const char *audio_group = "A1";
972 char audio_codec_str[128] = "\0";
974 int max_audio_bitrate = 0;
976 // Publish master playlist only the configured rate
977 if (c->master_playlist_created && (!c->master_publish_rate ||
978 c->streams[0].segment_index % c->master_publish_rate))
982 snprintf(filename_hls, sizeof(filename_hls), "%smaster.m3u8", c->dirname);
984 snprintf(filename_hls, sizeof(filename_hls), "master.m3u8");
986 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
988 set_http_options(&opts, c);
989 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename, &opts);
992 return handle_io_open_error(s, ret, temp_filename);
995 ff_hls_write_playlist_version(c->m3u8_out, 7);
997 for (i = 0; i < s->nb_streams; i++) {
998 char playlist_file[64];
999 AVStream *st = s->streams[i];
1000 OutputStream *os = &c->streams[i];
1001 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1003 if (os->segment_type != SEGMENT_TYPE_MP4)
1005 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1006 ff_hls_write_audio_rendition(c->m3u8_out, (char *)audio_group,
1007 playlist_file, NULL, i, is_default);
1008 max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
1009 os->muxer_overhead, max_audio_bitrate);
1010 if (!av_strnstr(audio_codec_str, os->codec_str, sizeof(audio_codec_str))) {
1011 if (strlen(audio_codec_str))
1012 av_strlcat(audio_codec_str, ",", sizeof(audio_codec_str));
1013 av_strlcat(audio_codec_str, os->codec_str, sizeof(audio_codec_str));
1018 for (i = 0; i < s->nb_streams; i++) {
1019 char playlist_file[64];
1020 char codec_str[128];
1021 AVStream *st = s->streams[i];
1022 OutputStream *os = &c->streams[i];
1023 char *agroup = NULL;
1024 char *codec_str_ptr = NULL;
1025 int stream_bitrate = st->codecpar->bit_rate + os->muxer_overhead;
1026 if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1028 if (os->segment_type != SEGMENT_TYPE_MP4)
1030 av_strlcpy(codec_str, os->codec_str, sizeof(codec_str));
1031 if (max_audio_bitrate) {
1032 agroup = (char *)audio_group;
1033 stream_bitrate += max_audio_bitrate;
1034 av_strlcat(codec_str, ",", sizeof(codec_str));
1035 av_strlcat(codec_str, audio_codec_str, sizeof(codec_str));
1037 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC) {
1038 codec_str_ptr = codec_str;
1040 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1041 ff_hls_write_stream_info(st, c->m3u8_out, stream_bitrate,
1042 playlist_file, agroup,
1043 codec_str_ptr, NULL);
1045 dashenc_io_close(s, &c->m3u8_out, temp_filename);
1047 if ((ret = avpriv_io_move(temp_filename, filename_hls)) < 0)
1049 c->master_playlist_created = 1;
1055 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
1057 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
1059 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
1063 static int dash_init(AVFormatContext *s)
1065 DASHContext *c = s->priv_data;
1068 char basename[1024];
1070 if (c->single_file_name)
1073 c->use_template = 0;
1075 #if FF_API_DASH_MIN_SEG_DURATION
1076 if (c->min_seg_duration != 5000000) {
1077 av_log(s, AV_LOG_WARNING, "The min_seg_duration option is deprecated and will be removed. Please use the -seg_duration\n");
1078 c->seg_duration = c->min_seg_duration;
1081 if (c->lhls && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1082 av_log(s, AV_LOG_ERROR,
1083 "LHLS is experimental, Please set -strict experimental in order to enable it.\n");
1084 return AVERROR_EXPERIMENTAL;
1087 if (c->lhls && !c->streaming) {
1088 av_log(s, AV_LOG_WARNING, "LHLS option will be ignored as streaming is not enabled\n");
1092 if (c->lhls && !c->hls_playlist) {
1093 av_log(s, AV_LOG_WARNING, "LHLS option will be ignored as hls_playlist is not enabled\n");
1097 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
1098 ptr = strrchr(c->dirname, '/');
1100 av_strlcpy(basename, &ptr[1], sizeof(basename));
1103 c->dirname[0] = '\0';
1104 av_strlcpy(basename, s->url, sizeof(basename));
1107 ptr = strrchr(basename, '.');
1111 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
1113 return AVERROR(ENOMEM);
1115 if ((ret = parse_adaptation_sets(s)) < 0)
1118 if ((ret = init_segment_types(s)) < 0)
1121 for (i = 0; i < s->nb_streams; i++) {
1122 OutputStream *os = &c->streams[i];
1123 AdaptationSet *as = &c->as[os->as_idx - 1];
1124 AVFormatContext *ctx;
1126 AVDictionary *opts = NULL;
1127 char filename[1024];
1129 os->bit_rate = s->streams[i]->codecpar->bit_rate;
1130 if (!os->bit_rate) {
1131 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
1132 AV_LOG_ERROR : AV_LOG_WARNING;
1133 av_log(s, level, "No bit rate set for stream %d\n", i);
1134 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
1135 return AVERROR(EINVAL);
1138 // copy AdaptationSet language and role from stream metadata
1139 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
1140 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
1142 ctx = avformat_alloc_context();
1144 return AVERROR(ENOMEM);
1146 if (c->init_seg_name) {
1147 os->init_seg_name = av_strireplace(c->init_seg_name, "$ext$", os->format_name);
1148 if (!os->init_seg_name)
1149 return AVERROR(ENOMEM);
1151 if (c->media_seg_name) {
1152 os->media_seg_name = av_strireplace(c->media_seg_name, "$ext$", os->format_name);
1153 if (!os->media_seg_name)
1154 return AVERROR(ENOMEM);
1156 if (c->single_file_name) {
1157 os->single_file_name = av_strireplace(c->single_file_name, "$ext$", os->format_name);
1158 if (!os->single_file_name)
1159 return AVERROR(ENOMEM);
1162 if (os->segment_type == SEGMENT_TYPE_WEBM) {
1163 if ((!c->single_file && check_file_extension(os->init_seg_name, os->format_name) != 0) ||
1164 (!c->single_file && check_file_extension(os->media_seg_name, os->format_name) != 0) ||
1165 (c->single_file && check_file_extension(os->single_file_name, os->format_name) != 0)) {
1166 av_log(s, AV_LOG_WARNING,
1167 "One or many segment file names doesn't end with .webm. "
1168 "Override -init_seg_name and/or -media_seg_name and/or "
1169 "-single_file_name to end with the extension .webm\n");
1173 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
1175 return AVERROR_MUXER_NOT_FOUND;
1177 ctx->interrupt_callback = s->interrupt_callback;
1178 ctx->opaque = s->opaque;
1179 ctx->io_close = s->io_close;
1180 ctx->io_open = s->io_open;
1181 ctx->strict_std_compliance = s->strict_std_compliance;
1183 if (!(st = avformat_new_stream(ctx, NULL)))
1184 return AVERROR(ENOMEM);
1185 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
1186 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
1187 st->time_base = s->streams[i]->time_base;
1188 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
1189 ctx->avoid_negative_ts = s->avoid_negative_ts;
1190 ctx->flags = s->flags;
1192 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
1195 if (c->single_file) {
1196 if (os->single_file_name)
1197 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->single_file_name, i, 0, os->bit_rate, 0);
1199 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.%s", basename, i, os->format_name);
1201 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->init_seg_name, i, 0, os->bit_rate, 0);
1203 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1204 set_http_options(&opts, c);
1205 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
1206 av_dict_free(&opts);
1209 os->init_start_pos = 0;
1211 if (c->format_options_str) {
1212 ret = av_dict_parse_string(&opts, c->format_options_str, "=", ":", 0);
1217 if (os->segment_type == SEGMENT_TYPE_MP4) {
1219 // frag_every_frame : Allows lower latency streaming
1220 // skip_sidx : Reduce bitrate overhead
1221 // skip_trailer : Avoids growing memory usage with time
1222 av_dict_set(&opts, "movflags", "frag_every_frame+dash+delay_moov+skip_sidx+skip_trailer", 0);
1224 av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov", 0);
1226 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
1227 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
1228 av_dict_set_int(&opts, "dash", 1, 0);
1229 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
1230 av_dict_set_int(&opts, "live", 1, 0);
1232 ret = avformat_init_output(ctx, &opts);
1233 av_dict_free(&opts);
1237 avio_flush(ctx->pb);
1239 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1241 s->streams[i]->time_base = st->time_base;
1242 // If the muxer wants to shift timestamps, request to have them shifted
1243 // already before being handed to this muxer, so we don't have mismatches
1244 // between the MPD and the actual segments.
1245 s->avoid_negative_ts = ctx->avoid_negative_ts;
1246 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1247 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1248 if (avg_frame_rate.num > 0) {
1249 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1250 as->min_frame_rate = avg_frame_rate;
1251 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1252 as->max_frame_rate = avg_frame_rate;
1254 as->ambiguous_frame_rate = 1;
1259 set_codec_str(s, st->codecpar, &st->avg_frame_rate, os->codec_str,
1260 sizeof(os->codec_str));
1261 os->first_pts = AV_NOPTS_VALUE;
1262 os->max_pts = AV_NOPTS_VALUE;
1263 os->last_dts = AV_NOPTS_VALUE;
1264 os->segment_index = 1;
1267 if (!c->has_video && c->seg_duration <= 0) {
1268 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1269 return AVERROR(EINVAL);
1274 static int dash_write_header(AVFormatContext *s)
1276 DASHContext *c = s->priv_data;
1278 for (i = 0; i < s->nb_streams; i++) {
1279 OutputStream *os = &c->streams[i];
1280 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1283 // Flush init segment
1284 // Only for WebM segment, since for mp4 delay_moov is set and
1285 // the init segment is thus flushed after the first packets.
1286 if (os->segment_type == SEGMENT_TYPE_WEBM &&
1287 (ret = flush_init_segment(s, os)) < 0)
1293 static int add_segment(OutputStream *os, const char *file,
1294 int64_t time, int64_t duration,
1295 int64_t start_pos, int64_t range_length,
1296 int64_t index_length, int next_exp_index)
1300 if (os->nb_segments >= os->segments_size) {
1301 os->segments_size = (os->segments_size + 1) * 2;
1302 if ((err = av_reallocp(&os->segments, sizeof(*os->segments) *
1303 os->segments_size)) < 0) {
1304 os->segments_size = 0;
1305 os->nb_segments = 0;
1309 seg = av_mallocz(sizeof(*seg));
1311 return AVERROR(ENOMEM);
1312 av_strlcpy(seg->file, file, sizeof(seg->file));
1314 seg->duration = duration;
1315 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1316 seg->duration += seg->time;
1319 seg->start_pos = start_pos;
1320 seg->range_length = range_length;
1321 seg->index_length = index_length;
1322 os->segments[os->nb_segments++] = seg;
1323 os->segment_index++;
1324 //correcting the segment index if it has fallen behind the expected value
1325 if (os->segment_index < next_exp_index) {
1326 av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n",
1327 file, os->segment_index, next_exp_index);
1328 os->segment_index = next_exp_index;
1333 static void write_styp(AVIOContext *pb)
1336 ffio_wfourcc(pb, "styp");
1337 ffio_wfourcc(pb, "msdh");
1338 avio_wb32(pb, 0); /* minor */
1339 ffio_wfourcc(pb, "msdh");
1340 ffio_wfourcc(pb, "msix");
1343 static void find_index_range(AVFormatContext *s, const char *full_path,
1344 int64_t pos, int *index_length)
1350 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1353 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1354 ff_format_io_close(s, &pb);
1357 ret = avio_read(pb, buf, 8);
1358 ff_format_io_close(s, &pb);
1361 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1363 *index_length = AV_RB32(&buf[0]);
1366 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1367 AVCodecParameters *par,
1368 AVRational *frame_rate)
1372 if (os->ctx->streams[0]->codecpar->extradata_size || !par->extradata_size)
1375 extradata = av_malloc(par->extradata_size);
1378 return AVERROR(ENOMEM);
1380 memcpy(extradata, par->extradata, par->extradata_size);
1382 os->ctx->streams[0]->codecpar->extradata = extradata;
1383 os->ctx->streams[0]->codecpar->extradata_size = par->extradata_size;
1385 set_codec_str(s, par, frame_rate, os->codec_str, sizeof(os->codec_str));
1390 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1391 DASHContext *c = s->priv_data;
1392 int http_base_proto = ff_is_http_proto(filename);
1394 if (http_base_proto) {
1395 AVIOContext *out = NULL;
1396 AVDictionary *http_opts = NULL;
1398 set_http_options(&http_opts, c);
1399 av_dict_set(&http_opts, "method", "DELETE", 0);
1401 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1402 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1405 av_dict_free(&http_opts);
1406 ff_format_io_close(s, &out);
1408 int res = avpriv_io_delete(filename);
1410 char errbuf[AV_ERROR_MAX_STRING_SIZE];
1411 av_strerror(res, errbuf, sizeof(errbuf));
1412 av_log(s, (res == AVERROR(ENOENT) ? AV_LOG_WARNING : AV_LOG_ERROR), "failed to delete %s: %s\n", filename, errbuf);
1417 static int dashenc_delete_segment_file(AVFormatContext *s, const char* file)
1419 DASHContext *c = s->priv_data;
1420 size_t dirname_len, file_len;
1421 char filename[1024];
1423 dirname_len = strlen(c->dirname);
1424 if (dirname_len >= sizeof(filename)) {
1425 av_log(s, AV_LOG_WARNING, "Cannot delete segments as the directory path is too long: %"PRIu64" characters: %s\n",
1426 (uint64_t)dirname_len, c->dirname);
1427 return AVERROR(ENAMETOOLONG);
1430 memcpy(filename, c->dirname, dirname_len);
1432 file_len = strlen(file);
1433 if ((dirname_len + file_len) >= sizeof(filename)) {
1434 av_log(s, AV_LOG_WARNING, "Cannot delete segments as the path is too long: %"PRIu64" characters: %s%s\n",
1435 (uint64_t)(dirname_len + file_len), c->dirname, file);
1436 return AVERROR(ENAMETOOLONG);
1439 memcpy(filename + dirname_len, file, file_len + 1); // include the terminating zero
1440 dashenc_delete_file(s, filename);
1445 static inline void dashenc_delete_media_segments(AVFormatContext *s, OutputStream *os, int remove_count)
1447 for (int i = 0; i < remove_count; ++i) {
1448 dashenc_delete_segment_file(s, os->segments[i]->file);
1450 // Delete the segment regardless of whether the file was successfully deleted
1451 av_free(os->segments[i]);
1454 os->nb_segments -= remove_count;
1455 memmove(os->segments, os->segments + remove_count, os->nb_segments * sizeof(*os->segments));
1458 static int dash_flush(AVFormatContext *s, int final, int stream)
1460 DASHContext *c = s->priv_data;
1463 const char *proto = avio_find_protocol_name(s->url);
1464 int use_rename = proto && !strcmp(proto, "file");
1466 int cur_flush_segment_index = 0, next_exp_index = -1;
1468 cur_flush_segment_index = c->streams[stream].segment_index;
1470 //finding the next segment's expected index, based on the current pts value
1471 if (c->use_template && !c->use_timeline && c->index_correction &&
1472 c->streams[stream].last_pts != AV_NOPTS_VALUE &&
1473 c->streams[stream].first_pts != AV_NOPTS_VALUE) {
1474 int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts -
1475 c->streams[stream].first_pts,
1476 s->streams[stream]->time_base,
1478 next_exp_index = (pts_diff / c->seg_duration) + 1;
1482 for (i = 0; i < s->nb_streams; i++) {
1483 OutputStream *os = &c->streams[i];
1484 AVStream *st = s->streams[i];
1485 int range_length, index_length = 0;
1487 if (!os->packets_written)
1490 // Flush the single stream that got a keyframe right now.
1491 // Flush all audio streams as well, in sync with video keyframes,
1492 // but not the other video streams.
1493 if (stream >= 0 && i != stream) {
1494 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1496 // Make sure we don't flush audio streams multiple times, when
1497 // all video streams are flushed one at a time.
1498 if (c->has_video && os->segment_index > cur_flush_segment_index)
1502 if (!c->single_file) {
1503 if (os->segment_type == SEGMENT_TYPE_MP4 && !os->written_len)
1504 write_styp(os->ctx->pb);
1506 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1509 ret = flush_dynbuf(os, &range_length);
1512 os->packets_written = 0;
1514 if (c->single_file) {
1515 find_index_range(s, os->full_path, os->pos, &index_length);
1517 dashenc_io_close(s, &os->out, os->temp_path);
1520 ret = avpriv_io_move(os->temp_path, os->full_path);
1526 if (!os->muxer_overhead)
1527 os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1529 av_rescale_q(os->max_pts - os->start_pts,
1530 st->time_base, AV_TIME_BASE_Q);
1531 os->total_pkt_size = 0;
1533 if (!os->bit_rate) {
1534 // calculate average bitrate of first segment
1535 int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / av_rescale_q(os->max_pts - os->start_pts,
1539 os->bit_rate = bitrate;
1541 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index);
1542 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1544 os->pos += range_length;
1547 if (c->window_size) {
1548 for (i = 0; i < s->nb_streams; i++) {
1549 OutputStream *os = &c->streams[i];
1550 int remove_count = os->nb_segments - c->window_size - c->extra_window_size;
1551 if (remove_count > 0)
1552 dashenc_delete_media_segments(s, os, remove_count);
1557 ret = write_manifest(s, final);
1561 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
1563 DASHContext *c = s->priv_data;
1564 AVStream *st = s->streams[pkt->stream_index];
1565 OutputStream *os = &c->streams[pkt->stream_index];
1566 int64_t seg_end_duration, elapsed_duration;
1569 ret = update_stream_extradata(s, os, st->codecpar, &st->avg_frame_rate);
1573 // Fill in a heuristic guess of the packet duration, if none is available.
1574 // The mp4 muxer will do something similar (for the last packet in a fragment)
1575 // if nothing is set (setting it for the other packets doesn't hurt).
1576 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
1577 // invoke its heuristic (this doesn't have to be identical to that algorithm),
1578 // so that we know the exact timestamps of fragments.
1579 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
1580 pkt->duration = pkt->dts - os->last_dts;
1581 os->last_dts = pkt->dts;
1583 // If forcing the stream to start at 0, the mp4 muxer will set the start
1584 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
1585 if (os->first_pts == AV_NOPTS_VALUE &&
1586 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
1587 pkt->pts -= pkt->dts;
1591 if (os->first_pts == AV_NOPTS_VALUE)
1592 os->first_pts = pkt->pts;
1593 os->last_pts = pkt->pts;
1595 if (!c->availability_start_time[0])
1596 format_date_now(c->availability_start_time,
1597 sizeof(c->availability_start_time));
1599 if (!os->availability_time_offset && pkt->duration) {
1600 int64_t frame_duration = av_rescale_q(pkt->duration, st->time_base,
1602 os->availability_time_offset = ((double) c->seg_duration -
1603 frame_duration) / AV_TIME_BASE;
1606 if (c->use_template && !c->use_timeline) {
1607 elapsed_duration = pkt->pts - os->first_pts;
1608 seg_end_duration = (int64_t) os->segment_index * c->seg_duration;
1610 elapsed_duration = pkt->pts - os->start_pts;
1611 seg_end_duration = c->seg_duration;
1614 if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1615 pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
1616 av_compare_ts(elapsed_duration, st->time_base,
1617 seg_end_duration, AV_TIME_BASE_Q) >= 0) {
1618 int64_t prev_duration = c->last_duration;
1620 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
1623 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
1627 if ((!c->use_timeline || !c->use_template) && prev_duration) {
1628 if (c->last_duration < prev_duration*9/10 ||
1629 c->last_duration > prev_duration*11/10) {
1630 av_log(s, AV_LOG_WARNING,
1631 "Segment durations differ too much, enable use_timeline "
1632 "and use_template, or keep a stricter keyframe interval\n");
1636 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
1640 if (!os->packets_written) {
1641 // If we wrote a previous segment, adjust the start time of the segment
1642 // to the end of the previous one (which is the same as the mp4 muxer
1643 // does). This avoids gaps in the timeline.
1644 if (os->max_pts != AV_NOPTS_VALUE)
1645 os->start_pts = os->max_pts;
1647 os->start_pts = pkt->pts;
1649 if (os->max_pts == AV_NOPTS_VALUE)
1650 os->max_pts = pkt->pts + pkt->duration;
1652 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
1653 os->packets_written++;
1654 os->total_pkt_size += pkt->size;
1655 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
1658 if (!os->init_range_length)
1659 flush_init_segment(s, os);
1661 //open the output context when the first frame of a segment is ready
1662 if (!c->single_file && os->packets_written == 1) {
1663 AVDictionary *opts = NULL;
1664 const char *proto = avio_find_protocol_name(s->url);
1665 int use_rename = proto && !strcmp(proto, "file");
1666 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
1667 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
1668 os->media_seg_name, pkt->stream_index,
1669 os->segment_index, os->bit_rate, os->start_pts);
1670 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
1672 snprintf(os->temp_path, sizeof(os->temp_path),
1673 use_rename ? "%s.tmp" : "%s", os->full_path);
1674 set_http_options(&opts, c);
1675 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
1676 av_dict_free(&opts);
1678 return handle_io_open_error(s, ret, os->temp_path);
1681 char *prefetch_url = use_rename ? NULL : os->filename;
1682 write_hls_media_playlist(os, s, pkt->stream_index, 0, prefetch_url);
1686 //write out the data immediately in streaming mode
1687 if (c->streaming && os->segment_type == SEGMENT_TYPE_MP4) {
1689 uint8_t *buf = NULL;
1690 if (!os->written_len)
1691 write_styp(os->ctx->pb);
1692 avio_flush(os->ctx->pb);
1693 len = avio_get_dyn_buf (os->ctx->pb, &buf);
1695 avio_write(os->out, buf + os->written_len, len - os->written_len);
1696 avio_flush(os->out);
1698 os->written_len = len;
1704 static int dash_write_trailer(AVFormatContext *s)
1706 DASHContext *c = s->priv_data;
1709 if (s->nb_streams > 0) {
1710 OutputStream *os = &c->streams[0];
1711 // If no segments have been written so far, try to do a crude
1712 // guess of the segment duration
1713 if (!c->last_duration)
1714 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
1715 s->streams[0]->time_base,
1717 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
1718 s->streams[0]->time_base,
1721 dash_flush(s, 1, -1);
1723 for (i = 0; i < s->nb_streams; ++i) {
1724 OutputStream *os = &c->streams[i];
1725 if (os->ctx && os->ctx_inited) {
1726 av_write_trailer(os->ctx);
1729 if (c->remove_at_exit) {
1730 dashenc_delete_media_segments(s, os, os->nb_segments);
1731 dashenc_delete_segment_file(s, os->initfile);
1735 if (c->remove_at_exit) {
1736 dashenc_delete_file(s, s->url);
1738 if (c->hls_playlist && c->master_playlist_created) {
1739 char filename[1024];
1740 for (i = 0; i < s->nb_streams; ++i) {
1741 OutputStream *os = &c->streams[i];
1742 if (os->segment_type == SEGMENT_TYPE_MP4) {
1743 get_hls_playlist_name(filename, sizeof(filename), c->dirname, i);
1744 dashenc_delete_file(s, filename);
1747 snprintf(filename, sizeof(filename), "%smaster.m3u8", c->dirname);
1748 dashenc_delete_file(s, filename);
1755 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
1757 DASHContext *c = s->priv_data;
1758 OutputStream *os = &c->streams[avpkt->stream_index];
1759 AVFormatContext *oc = os->ctx;
1760 if (oc->oformat->check_bitstream) {
1762 AVPacket pkt = *avpkt;
1763 pkt.stream_index = 0;
1764 ret = oc->oformat->check_bitstream(oc, &pkt);
1766 AVStream *st = s->streams[avpkt->stream_index];
1767 AVStream *ost = oc->streams[0];
1768 st->internal->bsfcs = ost->internal->bsfcs;
1769 st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1770 ost->internal->bsfcs = NULL;
1771 ost->internal->nb_bsfcs = 0;
1778 #define OFFSET(x) offsetof(DASHContext, x)
1779 #define E AV_OPT_FLAG_ENCODING_PARAM
1780 static const AVOption options[] = {
1781 { "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 },
1782 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
1783 { "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 },
1784 #if FF_API_DASH_MIN_SEG_DURATION
1785 { "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 },
1787 { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
1788 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1789 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1790 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1791 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1792 { "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 },
1793 { "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 },
1794 { "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 },
1795 { "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 },
1796 { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1797 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1798 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1799 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1800 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1801 { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
1802 { "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1803 { "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},
1804 { "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"},
1805 { "auto", "select segment file format based on codec", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_AUTO }, 0, UINT_MAX, E, "segment_type"},
1806 { "mp4", "make segment file in ISOBMFF format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MP4 }, 0, UINT_MAX, E, "segment_type"},
1807 { "webm", "make segment file in WebM format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_WEBM }, 0, UINT_MAX, E, "segment_type"},
1808 { "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 },
1809 { "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 },
1810 { "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},
1814 static const AVClass dash_class = {
1815 .class_name = "dash muxer",
1816 .item_name = av_default_item_name,
1818 .version = LIBAVUTIL_VERSION_INT,
1821 AVOutputFormat ff_dash_muxer = {
1823 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
1824 .extensions = "mpd",
1825 .priv_data_size = sizeof(DASHContext),
1826 .audio_codec = AV_CODEC_ID_AAC,
1827 .video_codec = AV_CODEC_ID_H264,
1828 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
1830 .write_header = dash_write_header,
1831 .write_packet = dash_write_packet,
1832 .write_trailer = dash_write_trailer,
1833 .deinit = dash_free,
1834 .check_bitstream = dash_check_bitstream,
1835 .priv_class = &dash_class,