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/parseutils.h"
35 #include "libavutil/rational.h"
36 #include "libavutil/time.h"
37 #include "libavutil/time_internal.h"
42 #include "avio_internal.h"
43 #include "hlsplaylist.h"
44 #if CONFIG_HTTP_PROTOCOL
49 #include "os_support.h"
55 SEGMENT_TYPE_AUTO = 0,
63 FRAG_TYPE_EVERY_FRAME,
69 #define MPD_PROFILE_DASH 1
70 #define MPD_PROFILE_DVB 2
72 typedef struct Segment {
75 int range_length, index_length;
77 double prog_date_time;
82 typedef struct AdaptationSet {
86 int64_t frag_duration;
88 enum AVMediaType media_type;
89 AVDictionary *metadata;
90 AVRational min_frame_rate, max_frame_rate;
91 int ambiguous_frame_rate;
92 int64_t max_frag_duration;
93 int max_width, max_height;
99 typedef struct OutputStream {
100 AVFormatContext *ctx;
101 int ctx_inited, as_idx;
103 AVCodecParserContext *parser;
104 AVCodecContext *parser_avctx;
107 int64_t init_start_pos, pos;
108 int init_range_length;
109 int nb_segments, segments_size, segment_index;
110 int64_t seg_duration;
111 int64_t frag_duration;
112 int64_t last_duration;
114 int64_t first_pts, start_pts, max_pts;
115 int64_t last_dts, last_pts;
118 SegmentType segment_type; /* segment type selected for this particular stream */
119 const char *format_name;
120 const char *extension_name;
121 const char *single_file_name; /* file names selected for this particular stream */
122 const char *init_seg_name;
123 const char *media_seg_name;
128 char full_path[1024];
129 char temp_path[1024];
130 double availability_time_offset;
131 AVProducerReferenceTime producer_reference_time;
132 char producer_reference_time_str[100];
134 int64_t total_pkt_duration;
139 int coding_dependency;
142 typedef struct DASHContext {
143 const AVClass *class; /* Class for private options. */
144 char *adaptation_sets;
148 int extra_window_size;
149 #if FF_API_DASH_MIN_SEG_DURATION
150 int min_seg_duration;
152 int64_t seg_duration;
153 int64_t frag_duration;
158 OutputStream *streams;
160 int64_t last_duration;
161 int64_t total_duration;
162 char availability_start_time[100];
164 int64_t presentation_time_offset;
166 const char *single_file_name; /* file names as specified in options */
167 const char *init_seg_name;
168 const char *media_seg_name;
169 const char *utc_timing_url;
171 const char *user_agent;
172 AVDictionary *http_opts;
174 const char *hls_master_name;
176 int master_playlist_created;
177 AVIOContext *mpd_out;
178 AVIOContext *m3u8_out;
181 int index_correction;
182 AVDictionary *format_options;
184 SegmentType segment_type_option; /* segment type as specified in options */
185 int ignore_io_errors;
188 int master_publish_rate;
189 int nr_of_streams_to_flush;
190 int nr_of_streams_flushed;
193 int64_t max_gop_size;
194 int64_t max_segment_duration;
196 int64_t target_latency;
197 int target_latency_refid;
198 AVRational min_playback_rate;
199 AVRational max_playback_rate;
202 static struct codec_string {
206 { AV_CODEC_ID_VP8, "vp8" },
207 { AV_CODEC_ID_VP9, "vp9" },
208 { AV_CODEC_ID_VORBIS, "vorbis" },
209 { AV_CODEC_ID_OPUS, "opus" },
210 { AV_CODEC_ID_FLAC, "flac" },
214 static struct format_string {
215 SegmentType segment_type;
218 { SEGMENT_TYPE_AUTO, "auto" },
219 { SEGMENT_TYPE_MP4, "mp4" },
220 { SEGMENT_TYPE_WEBM, "webm" },
224 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
225 AVDictionary **options) {
226 DASHContext *c = s->priv_data;
227 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
228 int err = AVERROR_MUXER_NOT_FOUND;
229 if (!*pb || !http_base_proto || !c->http_persistent) {
230 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
231 #if CONFIG_HTTP_PROTOCOL
233 URLContext *http_url_context = ffio_geturlcontext(*pb);
234 av_assert0(http_url_context);
235 err = ff_http_do_new_request(http_url_context, filename);
237 ff_format_io_close(s, pb);
243 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
244 DASHContext *c = s->priv_data;
245 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
250 if (!http_base_proto || !c->http_persistent) {
251 ff_format_io_close(s, pb);
252 #if CONFIG_HTTP_PROTOCOL
254 URLContext *http_url_context = ffio_geturlcontext(*pb);
255 av_assert0(http_url_context);
257 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
262 static const char *get_format_str(SegmentType segment_type) {
264 for (i = 0; i < SEGMENT_TYPE_NB; i++)
265 if (formats[i].segment_type == segment_type)
266 return formats[i].str;
270 static const char *get_extension_str(SegmentType type, int single_file)
274 case SEGMENT_TYPE_MP4: return single_file ? "mp4" : "m4s";
275 case SEGMENT_TYPE_WEBM: return "webm";
276 default: return NULL;
280 static int handle_io_open_error(AVFormatContext *s, int err, char *url) {
281 DASHContext *c = s->priv_data;
282 char errbuf[AV_ERROR_MAX_STRING_SIZE];
283 av_strerror(err, errbuf, sizeof(errbuf));
284 av_log(s, c->ignore_io_errors ? AV_LOG_WARNING : AV_LOG_ERROR,
285 "Unable to open %s for writing: %s\n", url, errbuf);
286 return c->ignore_io_errors ? 0 : err;
289 static inline SegmentType select_segment_type(SegmentType segment_type, enum AVCodecID codec_id)
291 if (segment_type == SEGMENT_TYPE_AUTO) {
292 if (codec_id == AV_CODEC_ID_OPUS || codec_id == AV_CODEC_ID_VORBIS ||
293 codec_id == AV_CODEC_ID_VP8 || codec_id == AV_CODEC_ID_VP9) {
294 segment_type = SEGMENT_TYPE_WEBM;
296 segment_type = SEGMENT_TYPE_MP4;
303 static int init_segment_types(AVFormatContext *s)
305 DASHContext *c = s->priv_data;
306 int has_mp4_streams = 0;
307 for (int i = 0; i < s->nb_streams; ++i) {
308 OutputStream *os = &c->streams[i];
309 SegmentType segment_type = select_segment_type(
310 c->segment_type_option, s->streams[i]->codecpar->codec_id);
311 os->segment_type = segment_type;
312 os->format_name = get_format_str(segment_type);
313 if (!os->format_name) {
314 av_log(s, AV_LOG_ERROR, "Could not select DASH segment type for stream %d\n", i);
315 return AVERROR_MUXER_NOT_FOUND;
317 os->extension_name = get_extension_str(segment_type, c->single_file);
318 if (!os->extension_name) {
319 av_log(s, AV_LOG_ERROR, "Could not get extension type for stream %d\n", i);
320 return AVERROR_MUXER_NOT_FOUND;
323 has_mp4_streams |= segment_type == SEGMENT_TYPE_MP4;
326 if (c->hls_playlist && !has_mp4_streams) {
327 av_log(s, AV_LOG_WARNING, "No mp4 streams, disabling HLS manifest generation\n");
334 static int check_file_extension(const char *filename, const char *extension) {
336 if (!filename || !extension)
338 dot = strrchr(filename, '.');
339 if (dot && !strcmp(dot + 1, extension))
344 static void set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par,
345 AVRational *frame_rate, char *str, int size) {
347 int ret = ff_isom_get_vpcc_features(s, par, frame_rate, &vpcc);
349 av_strlcatf(str, size, "vp09.%02d.%02d.%02d",
350 vpcc.profile, vpcc.level, vpcc.bitdepth);
352 // Default to just vp9 in case of error while finding out profile or level
353 av_log(s, AV_LOG_WARNING, "Could not find VP9 profile and/or level\n");
354 av_strlcpy(str, "vp9", size);
359 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
360 AVRational *frame_rate, char *str, int size)
362 const AVCodecTag *tags[2] = { NULL, NULL };
366 // common Webm codecs are not part of RFC 6381
367 for (i = 0; codecs[i].id; i++)
368 if (codecs[i].id == par->codec_id) {
369 if (codecs[i].id == AV_CODEC_ID_VP9) {
370 set_vp9_codec_str(s, par, frame_rate, str, size);
372 av_strlcpy(str, codecs[i].str, size);
377 // for codecs part of RFC 6381
378 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
379 tags[0] = ff_codec_movvideo_tags;
380 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
381 tags[0] = ff_codec_movaudio_tags;
385 tag = par->codec_tag;
387 tag = av_codec_get_tag(tags, par->codec_id);
395 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
397 tags[0] = ff_mp4_obj_type;
398 oti = av_codec_get_tag(tags, par->codec_id);
400 av_strlcatf(str, size, ".%02"PRIx32, oti);
404 if (tag == MKTAG('m', 'p', '4', 'a')) {
405 if (par->extradata_size >= 2) {
406 int aot = par->extradata[0] >> 3;
408 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
409 av_strlcatf(str, size, ".%d", aot);
411 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
412 // Unimplemented, should output ProfileLevelIndication as a decimal number
413 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
415 } else if (!strcmp(str, "avc1")) {
416 uint8_t *tmpbuf = NULL;
417 uint8_t *extradata = par->extradata;
418 int extradata_size = par->extradata_size;
421 if (extradata[0] != 1) {
423 if (avio_open_dyn_buf(&pb) < 0)
425 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
426 ffio_free_dyn_buf(&pb);
429 extradata_size = avio_close_dyn_buf(pb, &extradata);
433 if (extradata_size >= 4)
434 av_strlcatf(str, size, ".%02x%02x%02x",
435 extradata[1], extradata[2], extradata[3]);
437 } else if (!strcmp(str, "av01")) {
438 AV1SequenceParameters seq;
439 if (!par->extradata_size)
441 if (ff_av1_parse_seq_header(&seq, par->extradata, par->extradata_size) < 0)
444 av_strlcatf(str, size, ".%01u.%02u%s.%02u",
445 seq.profile, seq.level, seq.tier ? "H" : "M", seq.bitdepth);
446 if (seq.color_description_present_flag)
447 av_strlcatf(str, size, ".%01u.%01u%01u%01u.%02u.%02u.%02u.%01u",
449 seq.chroma_subsampling_x, seq.chroma_subsampling_y, seq.chroma_sample_position,
450 seq.color_primaries, seq.transfer_characteristics, seq.matrix_coefficients,
455 static int flush_dynbuf(DASHContext *c, OutputStream *os, int *range_length)
460 return AVERROR(EINVAL);
464 av_write_frame(os->ctx, NULL);
465 avio_flush(os->ctx->pb);
467 if (!c->single_file) {
469 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
472 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
477 return avio_open_dyn_buf(&os->ctx->pb);
479 *range_length = avio_tell(os->ctx->pb) - os->pos;
484 static void set_http_options(AVDictionary **options, DASHContext *c)
487 av_dict_set(options, "method", c->method, 0);
488 av_dict_copy(options, c->http_opts, 0);
490 av_dict_set(options, "user_agent", c->user_agent, 0);
491 if (c->http_persistent)
492 av_dict_set_int(options, "multiple_requests", 1, 0);
494 av_dict_set_int(options, "timeout", c->timeout, 0);
497 static void get_hls_playlist_name(char *playlist_name, int string_size,
498 const char *base_url, int id) {
500 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
502 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
505 static void get_start_index_number(OutputStream *os, DASHContext *c,
506 int *start_index, int *start_number) {
509 if (c->window_size) {
510 *start_index = FFMAX(os->nb_segments - c->window_size, 0);
511 *start_number = FFMAX(os->segment_index - c->window_size, 1);
515 static void write_hls_media_playlist(OutputStream *os, AVFormatContext *s,
516 int representation_id, int final,
517 char *prefetch_url) {
518 DASHContext *c = s->priv_data;
519 int timescale = os->ctx->streams[0]->time_base.den;
520 char temp_filename_hls[1024];
521 char filename_hls[1024];
522 AVDictionary *http_opts = NULL;
523 int target_duration = 0;
525 const char *proto = avio_find_protocol_name(c->dirname);
526 int use_rename = proto && !strcmp(proto, "file");
527 int i, start_index, start_number;
528 double prog_date_time = 0;
530 get_start_index_number(os, c, &start_index, &start_number);
532 if (!c->hls_playlist || start_index >= os->nb_segments ||
533 os->segment_type != SEGMENT_TYPE_MP4)
536 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
537 c->dirname, representation_id);
539 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
541 set_http_options(&http_opts, c);
542 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
543 av_dict_free(&http_opts);
545 handle_io_open_error(s, ret, temp_filename_hls);
548 for (i = start_index; i < os->nb_segments; i++) {
549 Segment *seg = os->segments[i];
550 double duration = (double) seg->duration / timescale;
551 if (target_duration <= duration)
552 target_duration = lrint(duration);
555 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
556 start_number, PLAYLIST_TYPE_NONE, 0);
558 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
559 os->init_range_length, os->init_start_pos);
561 for (i = start_index; i < os->nb_segments; i++) {
562 Segment *seg = os->segments[i];
564 if (prog_date_time == 0) {
565 if (os->nb_segments == 1)
566 prog_date_time = c->start_time_s;
568 prog_date_time = seg->prog_date_time;
570 seg->prog_date_time = prog_date_time;
572 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
573 (double) seg->duration / timescale, 0,
574 seg->range_length, seg->start_pos, NULL,
575 c->single_file ? os->initfile : seg->file,
576 &prog_date_time, 0, 0, 0);
578 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
583 avio_printf(c->m3u8_out, "#EXT-X-PREFETCH:%s\n", prefetch_url);
586 ff_hls_write_end_list(c->m3u8_out);
588 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
591 ff_rename(temp_filename_hls, filename_hls, os->ctx);
594 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
596 DASHContext *c = s->priv_data;
597 int ret, range_length;
599 ret = flush_dynbuf(c, os, &range_length);
603 os->pos = os->init_range_length = range_length;
604 if (!c->single_file) {
606 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
607 dashenc_io_close(s, &os->out, filename);
612 static void dash_free(AVFormatContext *s)
614 DASHContext *c = s->priv_data;
618 for (i = 0; i < c->nb_as; i++) {
619 av_dict_free(&c->as[i].metadata);
620 av_freep(&c->as[i].descriptor);
628 for (i = 0; i < s->nb_streams; i++) {
629 OutputStream *os = &c->streams[i];
630 if (os->ctx && os->ctx->pb) {
632 ffio_free_dyn_buf(&os->ctx->pb);
634 avio_close(os->ctx->pb);
636 ff_format_io_close(s, &os->out);
637 avformat_free_context(os->ctx);
638 avcodec_free_context(&os->parser_avctx);
639 av_parser_close(os->parser);
640 for (j = 0; j < os->nb_segments; j++)
641 av_free(os->segments[j]);
642 av_free(os->segments);
643 av_freep(&os->single_file_name);
644 av_freep(&os->init_seg_name);
645 av_freep(&os->media_seg_name);
647 av_freep(&c->streams);
649 ff_format_io_close(s, &c->mpd_out);
650 ff_format_io_close(s, &c->m3u8_out);
653 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
654 int representation_id, int final)
656 DASHContext *c = s->priv_data;
657 int i, start_index, start_number;
658 get_start_index_number(os, c, &start_index, &start_number);
660 if (c->use_template) {
661 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
662 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
663 if (!c->use_timeline) {
664 avio_printf(out, "duration=\"%"PRId64"\" ", os->seg_duration);
665 if (c->streaming && os->availability_time_offset)
666 avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
667 os->availability_time_offset);
669 if (c->streaming && os->availability_time_offset && !final)
670 avio_printf(out, "availabilityTimeComplete=\"false\" ");
672 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\"", os->init_seg_name, os->media_seg_name, c->use_timeline ? start_number : 1);
673 if (c->presentation_time_offset)
674 avio_printf(out, " presentationTimeOffset=\"%"PRId64"\"", c->presentation_time_offset);
675 avio_printf(out, ">\n");
676 if (c->use_timeline) {
677 int64_t cur_time = 0;
678 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
679 for (i = start_index; i < os->nb_segments; ) {
680 Segment *seg = os->segments[i];
682 avio_printf(out, "\t\t\t\t\t\t<S ");
683 if (i == start_index || seg->time != cur_time) {
684 cur_time = seg->time;
685 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
687 avio_printf(out, "d=\"%"PRId64"\" ", seg->duration);
688 while (i + repeat + 1 < os->nb_segments &&
689 os->segments[i + repeat + 1]->duration == seg->duration &&
690 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
693 avio_printf(out, "r=\"%d\" ", repeat);
694 avio_printf(out, "/>\n");
696 cur_time += (1 + repeat) * seg->duration;
698 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
700 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
701 } else if (c->single_file) {
702 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
703 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, FFMIN(os->seg_duration, os->last_duration), start_number);
704 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);
705 for (i = start_index; i < os->nb_segments; i++) {
706 Segment *seg = os->segments[i];
707 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
708 if (seg->index_length)
709 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
710 avio_printf(out, "/>\n");
712 avio_printf(out, "\t\t\t\t</SegmentList>\n");
714 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, FFMIN(os->seg_duration, os->last_duration), start_number);
715 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
716 for (i = start_index; i < os->nb_segments; i++) {
717 Segment *seg = os->segments[i];
718 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
720 avio_printf(out, "\t\t\t\t</SegmentList>\n");
722 if (!c->lhls || final) {
723 write_hls_media_playlist(os, s, representation_id, final, NULL);
728 static char *xmlescape(const char *str) {
729 int outlen = strlen(str)*3/2 + 6;
730 char *out = av_realloc(NULL, outlen + 1);
734 for (; *str; str++) {
735 if (pos + 6 > outlen) {
737 outlen = 2 * outlen + 6;
738 tmp = av_realloc(out, outlen + 1);
746 memcpy(&out[pos], "&", 5);
748 } else if (*str == '<') {
749 memcpy(&out[pos], "<", 4);
751 } else if (*str == '>') {
752 memcpy(&out[pos], ">", 4);
754 } else if (*str == '\'') {
755 memcpy(&out[pos], "'", 6);
757 } else if (*str == '\"') {
758 memcpy(&out[pos], """, 6);
768 static void write_time(AVIOContext *out, int64_t time)
770 int seconds = time / AV_TIME_BASE;
771 int fractions = time % AV_TIME_BASE;
772 int minutes = seconds / 60;
773 int hours = minutes / 60;
776 avio_printf(out, "PT");
778 avio_printf(out, "%dH", hours);
779 if (hours || minutes)
780 avio_printf(out, "%dM", minutes);
781 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
784 static void format_date(char *buf, int size, int64_t time_us)
786 struct tm *ptm, tmbuf;
787 int64_t time_ms = time_us / 1000;
788 const time_t time_s = time_ms / 1000;
789 int millisec = time_ms - (time_s * 1000);
790 ptm = gmtime_r(&time_s, &tmbuf);
793 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%S", ptm)) {
798 snprintf(buf + len, size - len, ".%03dZ", millisec);
802 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
805 DASHContext *c = s->priv_data;
806 AdaptationSet *as = &c->as[as_index];
807 AVDictionaryEntry *lang, *role;
810 avio_printf(out, "\t\t<AdaptationSet id=\"%d\" contentType=\"%s\" startWithSAP=\"1\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
811 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
812 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)
813 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
814 else 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))
815 avio_printf(out, " frameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
816 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
817 avio_printf(out, " maxWidth=\"%d\" maxHeight=\"%d\"", as->max_width, as->max_height);
818 avio_printf(out, " par=\"%d:%d\"", as->par.num, as->par.den);
820 lang = av_dict_get(as->metadata, "language", NULL, 0);
822 avio_printf(out, " lang=\"%s\"", lang->value);
823 avio_printf(out, ">\n");
825 if (!final && c->ldash && as->max_frag_duration && !(c->profile & MPD_PROFILE_DVB))
826 avio_printf(out, "\t\t\t<Resync dT=\"%"PRId64"\" type=\"0\"/>\n", as->max_frag_duration);
827 if (as->trick_idx >= 0)
828 avio_printf(out, "\t\t\t<EssentialProperty id=\"%d\" schemeIdUri=\"http://dashif.org/guidelines/trickmode\" value=\"%d\"/>\n", as->id, as->trick_idx);
829 role = av_dict_get(as->metadata, "role", NULL, 0);
831 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
833 avio_printf(out, "\t\t\t%s\n", as->descriptor);
834 for (i = 0; i < s->nb_streams; i++) {
835 AVStream *st = s->streams[i];
836 OutputStream *os = &c->streams[i];
837 char bandwidth_str[64] = {'\0'};
839 if (os->as_idx - 1 != as_index)
842 if (os->bit_rate > 0)
843 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"",
846 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
847 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
848 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
849 if (st->codecpar->field_order == AV_FIELD_UNKNOWN)
850 avio_printf(out, " scanType=\"unknown\"");
851 else if (st->codecpar->field_order != AV_FIELD_PROGRESSIVE)
852 avio_printf(out, " scanType=\"interlaced\"");
853 avio_printf(out, " sar=\"%d:%d\"", os->sar.num, os->sar.den);
854 if (st->avg_frame_rate.num && av_cmp_q(as->min_frame_rate, as->max_frame_rate) < 0)
855 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
856 if (as->trick_idx >= 0) {
857 AdaptationSet *tas = &c->as[as->trick_idx];
858 if (!as->ambiguous_frame_rate && !tas->ambiguous_frame_rate)
859 avio_printf(out, " maxPlayoutRate=\"%d\"", FFMAX((int)av_q2d(av_div_q(tas->min_frame_rate, as->min_frame_rate)), 1));
861 if (!os->coding_dependency)
862 avio_printf(out, " codingDependency=\"false\"");
863 avio_printf(out, ">\n");
865 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
866 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
867 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
868 s->streams[i]->codecpar->channels);
870 if (!final && c->write_prft && os->producer_reference_time_str[0]) {
871 avio_printf(out, "\t\t\t\t<ProducerReferenceTime id=\"%d\" inband=\"true\" type=\"%s\" wallClockTime=\"%s\" presentationTime=\"%"PRId64"\">\n",
872 i, os->producer_reference_time.flags ? "captured" : "encoder", os->producer_reference_time_str, c->presentation_time_offset);
873 avio_printf(out, "\t\t\t\t\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
874 avio_printf(out, "\t\t\t\t</ProducerReferenceTime>\n");
876 if (!final && c->ldash && os->gop_size && os->frag_type != FRAG_TYPE_NONE && !(c->profile & MPD_PROFILE_DVB) &&
877 (os->frag_type != FRAG_TYPE_DURATION || os->frag_duration != os->seg_duration))
878 avio_printf(out, "\t\t\t\t<Resync dT=\"%"PRId64"\" type=\"1\"/>\n", os->gop_size);
879 output_segment_list(os, out, s, i, final);
880 avio_printf(out, "\t\t\t</Representation>\n");
882 avio_printf(out, "\t\t</AdaptationSet>\n");
887 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
889 DASHContext *c = s->priv_data;
892 if (c->profile & MPD_PROFILE_DVB && (c->nb_as + 1) > 16) {
893 av_log(s, AV_LOG_ERROR, "DVB-DASH profile allows a max of 16 Adaptation Sets\n");
894 return AVERROR(EINVAL);
896 mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
898 return AVERROR(ENOMEM);
902 *as = &c->as[c->nb_as - 1];
903 memset(*as, 0, sizeof(**as));
904 (*as)->media_type = type;
905 (*as)->frag_type = -1;
906 (*as)->trick_idx = -1;
911 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
913 DASHContext *c = s->priv_data;
914 AdaptationSet *as = &c->as[as_idx - 1];
915 OutputStream *os = &c->streams[i];
917 if (as->media_type != s->streams[i]->codecpar->codec_type) {
918 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
919 return AVERROR(EINVAL);
920 } else if (os->as_idx) {
921 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
922 return AVERROR(EINVAL);
924 if (c->profile & MPD_PROFILE_DVB && (as->nb_streams + 1) > 16) {
925 av_log(s, AV_LOG_ERROR, "DVB-DASH profile allows a max of 16 Representations per Adaptation Set\n");
926 return AVERROR(EINVAL);
934 static int parse_adaptation_sets(AVFormatContext *s)
936 DASHContext *c = s->priv_data;
937 const char *p = c->adaptation_sets;
938 enum { new_set, parse_default, parsing_streams, parse_seg_duration, parse_frag_duration } state;
942 // default: one AdaptationSet for each stream
944 for (i = 0; i < s->nb_streams; i++) {
945 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
949 c->streams[i].as_idx = c->nb_as;
955 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
956 // option id=0,descriptor=descriptor_str,streams=0,1,2 and so on
957 // option id=0,seg_duration=2.5,frag_duration=0.5,streams=0,1,2
958 // id=1,trick_id=0,seg_duration=10,frag_type=none,streams=3 and so on
959 // descriptor is useful to the scheme defined by ISO/IEC 23009-1:2014/Amd.2:2015
960 // descriptor_str should be a self-closing xml tag.
961 // seg_duration and frag_duration have the same syntax as the global options of
962 // the same name, and the former have precedence over them if set.
968 } else if (state == new_set && av_strstart(p, "id=", &p)) {
969 char id_str[10], *end_str;
972 snprintf(id_str, sizeof(id_str), "%.*s", n, p);
974 i = strtol(id_str, &end_str, 10);
975 if (id_str == end_str || i < 0 || i > c->nb_as) {
976 av_log(s, AV_LOG_ERROR, "\"%s\" is not a valid value for an AdaptationSet id\n", id_str);
977 return AVERROR(EINVAL);
980 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
987 state = parse_default;
988 } else if (state != new_set && av_strstart(p, "seg_duration=", &p)) {
989 state = parse_seg_duration;
990 } else if (state != new_set && av_strstart(p, "frag_duration=", &p)) {
991 state = parse_frag_duration;
992 } else if (state == parse_seg_duration || state == parse_frag_duration) {
997 snprintf(str, sizeof(str), "%.*s", n, p);
1002 ret = av_parse_time(&usecs, str, 1);
1004 av_log(s, AV_LOG_ERROR, "Unable to parse option value \"%s\" as duration\n", str);
1008 if (state == parse_seg_duration)
1009 as->seg_duration = usecs;
1011 as->frag_duration = usecs;
1012 state = parse_default;
1013 } else if (state != new_set && av_strstart(p, "frag_type=", &p)) {
1016 n = strcspn(p, ",");
1017 snprintf(type_str, sizeof(type_str), "%.*s", n, p);
1022 if (!strcmp(type_str, "duration"))
1023 as->frag_type = FRAG_TYPE_DURATION;
1024 else if (!strcmp(type_str, "pframes"))
1025 as->frag_type = FRAG_TYPE_PFRAMES;
1026 else if (!strcmp(type_str, "every_frame"))
1027 as->frag_type = FRAG_TYPE_EVERY_FRAME;
1028 else if (!strcmp(type_str, "none"))
1029 as->frag_type = FRAG_TYPE_NONE;
1031 av_log(s, AV_LOG_ERROR, "Unable to parse option value \"%s\" as fragment type\n", type_str);
1034 state = parse_default;
1035 } else if (state != new_set && av_strstart(p, "descriptor=", &p)) {
1036 n = strcspn(p, ">") + 1; //followed by one comma, so plus 1
1037 if (n < strlen(p)) {
1038 as->descriptor = av_strndup(p, n);
1040 av_log(s, AV_LOG_ERROR, "Parse error, descriptor string should be a self-closing xml tag\n");
1041 return AVERROR(EINVAL);
1046 state = parse_default;
1047 } else if ((state != new_set) && av_strstart(p, "trick_id=", &p)) {
1048 char trick_id_str[10], *end_str;
1050 n = strcspn(p, ",");
1051 snprintf(trick_id_str, sizeof(trick_id_str), "%.*s", n, p);
1054 as->trick_idx = strtol(trick_id_str, &end_str, 10);
1055 if (trick_id_str == end_str || as->trick_idx < 0)
1056 return AVERROR(EINVAL);
1060 state = parse_default;
1061 } else if ((state != new_set) && av_strstart(p, "streams=", &p)) { //descriptor and durations are optional
1062 state = parsing_streams;
1063 } else if (state == parsing_streams) {
1064 AdaptationSet *as = &c->as[c->nb_as - 1];
1065 char idx_str[8], *end_str;
1067 n = strcspn(p, " ,");
1068 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
1071 // if value is "a" or "v", map all streams of that type
1072 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
1073 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
1074 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
1076 for (i = 0; i < s->nb_streams; i++) {
1077 if (s->streams[i]->codecpar->codec_type != type)
1080 as->media_type = s->streams[i]->codecpar->codec_type;
1082 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
1085 } else { // select single stream
1086 i = strtol(idx_str, &end_str, 10);
1087 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
1088 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
1089 return AVERROR(EINVAL);
1091 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
1093 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
1094 as->media_type = s->streams[i]->codecpar->codec_type;
1097 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
1106 return AVERROR(EINVAL);
1111 // check for unassigned streams
1112 for (i = 0; i < s->nb_streams; i++) {
1113 OutputStream *os = &c->streams[i];
1115 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
1116 return AVERROR(EINVAL);
1120 // check references for trick mode AdaptationSet
1121 for (i = 0; i < c->nb_as; i++) {
1123 if (as->trick_idx < 0)
1125 for (n = 0; n < c->nb_as; n++) {
1126 if (c->as[n].id == as->trick_idx)
1129 if (n >= c->nb_as) {
1130 av_log(s, AV_LOG_ERROR, "reference AdaptationSet id \"%d\" not found for trick mode AdaptationSet id \"%d\"\n", as->trick_idx, as->id);
1131 return AVERROR(EINVAL);
1138 static int write_manifest(AVFormatContext *s, int final)
1140 DASHContext *c = s->priv_data;
1142 char temp_filename[1024];
1144 const char *proto = avio_find_protocol_name(s->url);
1145 int use_rename = proto && !strcmp(proto, "file");
1146 static unsigned int warned_non_file = 0;
1147 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
1148 AVDictionary *opts = NULL;
1150 if (!use_rename && !warned_non_file++)
1151 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
1153 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
1154 set_http_options(&opts, c);
1155 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
1156 av_dict_free(&opts);
1158 return handle_io_open_error(s, ret, temp_filename);
1161 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
1162 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
1163 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
1164 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
1165 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
1167 if (c->profile & MPD_PROFILE_DASH)
1168 avio_printf(out, "%s%s", "urn:mpeg:dash:profile:isoff-live:2011", c->profile & MPD_PROFILE_DVB ? "," : "\"\n");
1169 if (c->profile & MPD_PROFILE_DVB)
1170 avio_printf(out, "%s", "urn:dvb:dash:profile:dvb-dash:2014\"\n");
1171 avio_printf(out, "\ttype=\"%s\"\n",
1172 final ? "static" : "dynamic");
1174 avio_printf(out, "\tmediaPresentationDuration=\"");
1175 write_time(out, c->total_duration);
1176 avio_printf(out, "\"\n");
1178 int64_t update_period = c->last_duration / AV_TIME_BASE;
1180 if (c->use_template && !c->use_timeline)
1181 update_period = 500;
1182 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
1184 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
1185 if (c->availability_start_time[0])
1186 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
1187 format_date(now_str, sizeof(now_str), av_gettime());
1189 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
1190 if (c->window_size && c->use_template) {
1191 avio_printf(out, "\ttimeShiftBufferDepth=\"");
1192 write_time(out, c->last_duration * c->window_size);
1193 avio_printf(out, "\"\n");
1196 avio_printf(out, "\tmaxSegmentDuration=\"");
1197 write_time(out, c->max_segment_duration);
1198 avio_printf(out, "\"\n");
1199 avio_printf(out, "\tminBufferTime=\"");
1200 write_time(out, c->ldash && c->max_gop_size ? c->max_gop_size : c->last_duration * 2);
1201 avio_printf(out, "\">\n");
1202 avio_printf(out, "\t<ProgramInformation>\n");
1204 char *escaped = xmlescape(title->value);
1205 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
1208 avio_printf(out, "\t</ProgramInformation>\n");
1210 avio_printf(out, "\t<ServiceDescription id=\"0\">\n");
1211 if (!final && c->target_latency && c->target_latency_refid >= 0) {
1212 avio_printf(out, "\t\t<Latency target=\"%"PRId64"\"", c->target_latency / 1000);
1213 if (s->nb_streams > 1)
1214 avio_printf(out, " referenceId=\"%d\"", c->target_latency_refid);
1215 avio_printf(out, "/>\n");
1217 if (av_cmp_q(c->min_playback_rate, (AVRational) {1, 1}) ||
1218 av_cmp_q(c->max_playback_rate, (AVRational) {1, 1}))
1219 avio_printf(out, "\t\t<PlaybackRate min=\"%.2f\" max=\"%.2f\"/>\n",
1220 av_q2d(c->min_playback_rate), av_q2d(c->max_playback_rate));
1221 avio_printf(out, "\t</ServiceDescription>\n");
1223 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
1224 OutputStream *os = &c->streams[0];
1225 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
1226 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
1227 avio_printf(out, "\t<Period id=\"0\" start=\"");
1228 write_time(out, start_time);
1229 avio_printf(out, "\">\n");
1231 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
1234 for (i = 0; i < c->nb_as; i++) {
1235 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
1238 avio_printf(out, "\t</Period>\n");
1240 if (c->utc_timing_url)
1241 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
1243 avio_printf(out, "</MPD>\n");
1245 dashenc_io_close(s, &c->mpd_out, temp_filename);
1248 if ((ret = ff_rename(temp_filename, s->url, s)) < 0)
1252 if (c->hls_playlist) {
1253 char filename_hls[1024];
1254 const char *audio_group = "A1";
1255 char audio_codec_str[128] = "\0";
1257 int max_audio_bitrate = 0;
1259 // Publish master playlist only the configured rate
1260 if (c->master_playlist_created && (!c->master_publish_rate ||
1261 c->streams[0].segment_index % c->master_publish_rate))
1265 snprintf(filename_hls, sizeof(filename_hls), "%s%s", c->dirname, c->hls_master_name);
1267 snprintf(filename_hls, sizeof(filename_hls), "%s", c->hls_master_name);
1269 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
1271 set_http_options(&opts, c);
1272 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename, &opts);
1273 av_dict_free(&opts);
1275 return handle_io_open_error(s, ret, temp_filename);
1278 ff_hls_write_playlist_version(c->m3u8_out, 7);
1280 for (i = 0; i < s->nb_streams; i++) {
1281 char playlist_file[64];
1282 AVStream *st = s->streams[i];
1283 OutputStream *os = &c->streams[i];
1284 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1286 if (os->segment_type != SEGMENT_TYPE_MP4)
1288 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1289 ff_hls_write_audio_rendition(c->m3u8_out, (char *)audio_group,
1290 playlist_file, NULL, i, is_default);
1291 max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
1292 os->muxer_overhead, max_audio_bitrate);
1293 if (!av_strnstr(audio_codec_str, os->codec_str, sizeof(audio_codec_str))) {
1294 if (strlen(audio_codec_str))
1295 av_strlcat(audio_codec_str, ",", sizeof(audio_codec_str));
1296 av_strlcat(audio_codec_str, os->codec_str, sizeof(audio_codec_str));
1301 for (i = 0; i < s->nb_streams; i++) {
1302 char playlist_file[64];
1303 char codec_str[128];
1304 AVStream *st = s->streams[i];
1305 OutputStream *os = &c->streams[i];
1306 char *agroup = NULL;
1307 char *codec_str_ptr = NULL;
1308 int stream_bitrate = st->codecpar->bit_rate + os->muxer_overhead;
1309 if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1311 if (os->segment_type != SEGMENT_TYPE_MP4)
1313 av_strlcpy(codec_str, os->codec_str, sizeof(codec_str));
1314 if (max_audio_bitrate) {
1315 agroup = (char *)audio_group;
1316 stream_bitrate += max_audio_bitrate;
1317 av_strlcat(codec_str, ",", sizeof(codec_str));
1318 av_strlcat(codec_str, audio_codec_str, sizeof(codec_str));
1320 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC) {
1321 codec_str_ptr = codec_str;
1323 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1324 ff_hls_write_stream_info(st, c->m3u8_out, stream_bitrate,
1325 playlist_file, agroup,
1326 codec_str_ptr, NULL, NULL);
1328 dashenc_io_close(s, &c->m3u8_out, temp_filename);
1330 if ((ret = ff_rename(temp_filename, filename_hls, s)) < 0)
1332 c->master_playlist_created = 1;
1338 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
1340 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
1342 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
1346 static int dash_init(AVFormatContext *s)
1348 DASHContext *c = s->priv_data;
1351 char basename[1024];
1353 c->nr_of_streams_to_flush = 0;
1354 if (c->single_file_name)
1357 c->use_template = 0;
1360 av_log(s, AV_LOG_ERROR, "At least one profile must be enabled.\n");
1361 return AVERROR(EINVAL);
1363 #if FF_API_DASH_MIN_SEG_DURATION
1364 if (c->min_seg_duration != 5000000) {
1365 av_log(s, AV_LOG_WARNING, "The min_seg_duration option is deprecated and will be removed. Please use the -seg_duration\n");
1366 c->seg_duration = c->min_seg_duration;
1369 if (c->lhls && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1370 av_log(s, AV_LOG_ERROR,
1371 "LHLS is experimental, Please set -strict experimental in order to enable it.\n");
1372 return AVERROR_EXPERIMENTAL;
1375 if (c->lhls && !c->streaming) {
1376 av_log(s, AV_LOG_WARNING, "LHLS option will be ignored as streaming is not enabled\n");
1380 if (c->lhls && !c->hls_playlist) {
1381 av_log(s, AV_LOG_WARNING, "LHLS option will be ignored as hls_playlist is not enabled\n");
1385 if (c->ldash && !c->streaming) {
1386 av_log(s, AV_LOG_WARNING, "LDash option will be ignored as streaming is not enabled\n");
1390 if (c->target_latency && !c->streaming) {
1391 av_log(s, AV_LOG_WARNING, "Target latency option will be ignored as streaming is not enabled\n");
1392 c->target_latency = 0;
1395 if (c->global_sidx && !c->single_file) {
1396 av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as single_file is not enabled\n");
1400 if (c->global_sidx && c->streaming) {
1401 av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as streaming is enabled\n");
1404 if (c->frag_type == FRAG_TYPE_NONE && c->streaming) {
1405 av_log(s, AV_LOG_VERBOSE, "Changing frag_type from none to every_frame as streaming is enabled\n");
1406 c->frag_type = FRAG_TYPE_EVERY_FRAME;
1409 if (c->write_prft < 0) {
1410 c->write_prft = c->ldash;
1412 av_log(s, AV_LOG_VERBOSE, "Enabling Producer Reference Time element for Low Latency mode\n");
1415 if (c->write_prft && !c->utc_timing_url) {
1416 av_log(s, AV_LOG_WARNING, "Producer Reference Time element option will be ignored as utc_timing_url is not set\n");
1420 if (c->write_prft && !c->streaming) {
1421 av_log(s, AV_LOG_WARNING, "Producer Reference Time element option will be ignored as streaming is not enabled\n");
1425 if (c->ldash && !c->write_prft) {
1426 av_log(s, AV_LOG_WARNING, "Low Latency mode enabled without Producer Reference Time element option! Resulting manifest may not be complaint\n");
1429 if (c->target_latency && !c->write_prft) {
1430 av_log(s, AV_LOG_WARNING, "Target latency option will be ignored as Producer Reference Time element will not be written\n");
1431 c->target_latency = 0;
1434 if (av_cmp_q(c->max_playback_rate, c->min_playback_rate) < 0) {
1435 av_log(s, AV_LOG_WARNING, "Minimum playback rate value is higer than the Maximum. Both will be ignored\n");
1436 c->min_playback_rate = c->max_playback_rate = (AVRational) {1, 1};
1439 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
1440 ptr = strrchr(c->dirname, '/');
1442 av_strlcpy(basename, &ptr[1], sizeof(basename));
1445 c->dirname[0] = '\0';
1446 av_strlcpy(basename, s->url, sizeof(basename));
1449 ptr = strrchr(basename, '.');
1453 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
1455 return AVERROR(ENOMEM);
1457 if ((ret = parse_adaptation_sets(s)) < 0)
1460 if ((ret = init_segment_types(s)) < 0)
1463 for (i = 0; i < s->nb_streams; i++) {
1464 OutputStream *os = &c->streams[i];
1465 AdaptationSet *as = &c->as[os->as_idx - 1];
1466 AVFormatContext *ctx;
1468 AVDictionary *opts = NULL;
1469 char filename[1024];
1471 os->bit_rate = s->streams[i]->codecpar->bit_rate;
1472 if (!os->bit_rate) {
1473 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
1474 AV_LOG_ERROR : AV_LOG_WARNING;
1475 av_log(s, level, "No bit rate set for stream %d\n", i);
1476 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
1477 return AVERROR(EINVAL);
1480 // copy AdaptationSet language and role from stream metadata
1481 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
1482 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
1484 if (c->init_seg_name) {
1485 os->init_seg_name = av_strireplace(c->init_seg_name, "$ext$", os->extension_name);
1486 if (!os->init_seg_name)
1487 return AVERROR(ENOMEM);
1489 if (c->media_seg_name) {
1490 os->media_seg_name = av_strireplace(c->media_seg_name, "$ext$", os->extension_name);
1491 if (!os->media_seg_name)
1492 return AVERROR(ENOMEM);
1494 if (c->single_file_name) {
1495 os->single_file_name = av_strireplace(c->single_file_name, "$ext$", os->extension_name);
1496 if (!os->single_file_name)
1497 return AVERROR(ENOMEM);
1500 if (os->segment_type == SEGMENT_TYPE_WEBM) {
1501 if ((!c->single_file && check_file_extension(os->init_seg_name, os->format_name) != 0) ||
1502 (!c->single_file && check_file_extension(os->media_seg_name, os->format_name) != 0) ||
1503 (c->single_file && check_file_extension(os->single_file_name, os->format_name) != 0)) {
1504 av_log(s, AV_LOG_WARNING,
1505 "One or many segment file names doesn't end with .webm. "
1506 "Override -init_seg_name and/or -media_seg_name and/or "
1507 "-single_file_name to end with the extension .webm\n");
1510 // Streaming not supported as matroskaenc buffers internally before writing the output
1511 av_log(s, AV_LOG_WARNING, "One or more streams in WebM output format. Streaming option will be ignored\n");
1516 os->ctx = ctx = avformat_alloc_context();
1518 return AVERROR(ENOMEM);
1520 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
1522 return AVERROR_MUXER_NOT_FOUND;
1523 ctx->interrupt_callback = s->interrupt_callback;
1524 ctx->opaque = s->opaque;
1525 ctx->io_close = s->io_close;
1526 ctx->io_open = s->io_open;
1527 ctx->strict_std_compliance = s->strict_std_compliance;
1529 if (!(st = avformat_new_stream(ctx, NULL)))
1530 return AVERROR(ENOMEM);
1531 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
1532 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
1533 st->time_base = s->streams[i]->time_base;
1534 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
1535 ctx->avoid_negative_ts = s->avoid_negative_ts;
1536 ctx->flags = s->flags;
1538 os->parser = av_parser_init(st->codecpar->codec_id);
1540 os->parser_avctx = avcodec_alloc_context3(NULL);
1541 if (!os->parser_avctx)
1542 return AVERROR(ENOMEM);
1543 ret = avcodec_parameters_to_context(os->parser_avctx, st->codecpar);
1546 // We only want to parse frame headers
1547 os->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1550 if (c->single_file) {
1551 if (os->single_file_name)
1552 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->single_file_name, i, 0, os->bit_rate, 0);
1554 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.%s", basename, i, os->format_name);
1556 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->init_seg_name, i, 0, os->bit_rate, 0);
1558 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1559 set_http_options(&opts, c);
1560 if (!c->single_file) {
1561 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
1563 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
1565 ctx->url = av_strdup(filename);
1566 ret = avio_open2(&ctx->pb, filename, AVIO_FLAG_WRITE, NULL, &opts);
1568 av_dict_free(&opts);
1571 os->init_start_pos = 0;
1573 av_dict_copy(&opts, c->format_options, 0);
1574 if (!as->seg_duration)
1575 as->seg_duration = c->seg_duration;
1576 if (!as->frag_duration)
1577 as->frag_duration = c->frag_duration;
1578 if (as->frag_type < 0)
1579 as->frag_type = c->frag_type;
1580 os->seg_duration = as->seg_duration;
1581 os->frag_duration = as->frag_duration;
1582 os->frag_type = as->frag_type;
1584 c->max_segment_duration = FFMAX(c->max_segment_duration, as->seg_duration);
1586 if (c->profile & MPD_PROFILE_DVB && (os->seg_duration > 15000000 || os->seg_duration < 960000)) {
1587 av_log(s, AV_LOG_ERROR, "Segment duration %"PRId64" is outside the allowed range for DVB-DASH profile\n", os->seg_duration);
1588 return AVERROR(EINVAL);
1591 if (os->frag_type == FRAG_TYPE_DURATION && !os->frag_duration) {
1592 av_log(s, AV_LOG_WARNING, "frag_type set to duration for stream %d but no frag_duration set\n", i);
1593 os->frag_type = c->streaming ? FRAG_TYPE_EVERY_FRAME : FRAG_TYPE_NONE;
1595 if (os->frag_type == FRAG_TYPE_DURATION && os->frag_duration > os->seg_duration) {
1596 av_log(s, AV_LOG_ERROR, "Fragment duration %"PRId64" is longer than Segment duration %"PRId64"\n", os->frag_duration, os->seg_duration);
1597 return AVERROR(EINVAL);
1599 if (os->frag_type == FRAG_TYPE_PFRAMES && (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO || !os->parser)) {
1600 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && !os->parser)
1601 av_log(s, AV_LOG_WARNING, "frag_type set to P-Frame reordering, but no parser found for stream %d\n", i);
1602 os->frag_type = c->streaming ? FRAG_TYPE_EVERY_FRAME : FRAG_TYPE_NONE;
1604 if (os->frag_type != FRAG_TYPE_PFRAMES && as->trick_idx < 0)
1605 // Set this now if a parser isn't used
1606 os->coding_dependency = 1;
1608 if (os->segment_type == SEGMENT_TYPE_MP4) {
1610 // skip_sidx : Reduce bitrate overhead
1611 // skip_trailer : Avoids growing memory usage with time
1612 av_dict_set(&opts, "movflags", "+dash+delay_moov+skip_sidx+skip_trailer", AV_DICT_APPEND);
1615 av_dict_set(&opts, "movflags", "+dash+delay_moov+global_sidx+skip_trailer", AV_DICT_APPEND);
1617 av_dict_set(&opts, "movflags", "+dash+delay_moov+skip_trailer", AV_DICT_APPEND);
1619 if (os->frag_type == FRAG_TYPE_EVERY_FRAME)
1620 av_dict_set(&opts, "movflags", "+frag_every_frame", AV_DICT_APPEND);
1622 av_dict_set(&opts, "movflags", "+frag_custom", AV_DICT_APPEND);
1623 if (os->frag_type == FRAG_TYPE_DURATION)
1624 av_dict_set_int(&opts, "frag_duration", os->frag_duration, 0);
1626 av_dict_set(&opts, "write_prft", "wallclock", 0);
1628 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
1629 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
1630 av_dict_set_int(&opts, "dash", 1, 0);
1631 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
1632 av_dict_set_int(&opts, "live", 1, 0);
1634 ret = avformat_init_output(ctx, &opts);
1635 av_dict_free(&opts);
1639 avio_flush(ctx->pb);
1641 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1643 s->streams[i]->time_base = st->time_base;
1644 // If the muxer wants to shift timestamps, request to have them shifted
1645 // already before being handed to this muxer, so we don't have mismatches
1646 // between the MPD and the actual segments.
1647 s->avoid_negative_ts = ctx->avoid_negative_ts;
1648 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1649 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1651 if (avg_frame_rate.num > 0) {
1652 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1653 as->min_frame_rate = avg_frame_rate;
1654 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1655 as->max_frame_rate = avg_frame_rate;
1657 as->ambiguous_frame_rate = 1;
1660 if (st->codecpar->width > as->max_width)
1661 as->max_width = st->codecpar->width;
1662 if (st->codecpar->height > as->max_height)
1663 as->max_height = st->codecpar->height;
1665 if (st->sample_aspect_ratio.num)
1666 os->sar = st->sample_aspect_ratio;
1668 os->sar = (AVRational){1,1};
1669 av_reduce(&par.num, &par.den,
1670 st->codecpar->width * (int64_t)os->sar.num,
1671 st->codecpar->height * (int64_t)os->sar.den,
1674 if (as->par.num && av_cmp_q(par, as->par)) {
1675 av_log(s, AV_LOG_ERROR, "Conflicting stream par values in Adaptation Set %d\n", os->as_idx);
1676 return AVERROR(EINVAL);
1683 set_codec_str(s, st->codecpar, &st->avg_frame_rate, os->codec_str,
1684 sizeof(os->codec_str));
1685 os->first_pts = AV_NOPTS_VALUE;
1686 os->max_pts = AV_NOPTS_VALUE;
1687 os->last_dts = AV_NOPTS_VALUE;
1688 os->segment_index = 1;
1690 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1691 c->nr_of_streams_to_flush++;
1694 if (!c->has_video && c->seg_duration <= 0) {
1695 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1696 return AVERROR(EINVAL);
1698 if (!c->has_video && c->frag_type == FRAG_TYPE_PFRAMES)
1699 av_log(s, AV_LOG_WARNING, "no video stream and P-frame fragmentation set\n");
1701 c->nr_of_streams_flushed = 0;
1702 c->target_latency_refid = -1;
1707 static int dash_write_header(AVFormatContext *s)
1709 DASHContext *c = s->priv_data;
1711 for (i = 0; i < s->nb_streams; i++) {
1712 OutputStream *os = &c->streams[i];
1713 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1716 // Flush init segment
1717 // Only for WebM segment, since for mp4 delay_moov is set and
1718 // the init segment is thus flushed after the first packets.
1719 if (os->segment_type == SEGMENT_TYPE_WEBM &&
1720 (ret = flush_init_segment(s, os)) < 0)
1726 static int add_segment(OutputStream *os, const char *file,
1727 int64_t time, int64_t duration,
1728 int64_t start_pos, int64_t range_length,
1729 int64_t index_length, int next_exp_index)
1733 if (os->nb_segments >= os->segments_size) {
1734 os->segments_size = (os->segments_size + 1) * 2;
1735 if ((err = av_reallocp_array(&os->segments, sizeof(*os->segments),
1736 os->segments_size)) < 0) {
1737 os->segments_size = 0;
1738 os->nb_segments = 0;
1742 seg = av_mallocz(sizeof(*seg));
1744 return AVERROR(ENOMEM);
1745 av_strlcpy(seg->file, file, sizeof(seg->file));
1747 seg->duration = duration;
1748 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1749 seg->duration += seg->time;
1752 seg->start_pos = start_pos;
1753 seg->range_length = range_length;
1754 seg->index_length = index_length;
1755 os->segments[os->nb_segments++] = seg;
1756 os->segment_index++;
1757 //correcting the segment index if it has fallen behind the expected value
1758 if (os->segment_index < next_exp_index) {
1759 av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n",
1760 file, os->segment_index, next_exp_index);
1761 os->segment_index = next_exp_index;
1766 static void write_styp(AVIOContext *pb)
1769 ffio_wfourcc(pb, "styp");
1770 ffio_wfourcc(pb, "msdh");
1771 avio_wb32(pb, 0); /* minor */
1772 ffio_wfourcc(pb, "msdh");
1773 ffio_wfourcc(pb, "msix");
1776 static void find_index_range(AVFormatContext *s, const char *full_path,
1777 int64_t pos, int *index_length)
1783 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1786 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1787 ff_format_io_close(s, &pb);
1790 ret = avio_read(pb, buf, 8);
1791 ff_format_io_close(s, &pb);
1794 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1796 *index_length = AV_RB32(&buf[0]);
1799 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1800 AVPacket *pkt, AVRational *frame_rate)
1802 AVCodecParameters *par = os->ctx->streams[0]->codecpar;
1804 int ret, extradata_size;
1806 if (par->extradata_size)
1809 extradata = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &extradata_size);
1810 if (!extradata_size)
1813 ret = ff_alloc_extradata(par, extradata_size);
1817 memcpy(par->extradata, extradata, extradata_size);
1819 set_codec_str(s, par, frame_rate, os->codec_str, sizeof(os->codec_str));
1824 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1825 DASHContext *c = s->priv_data;
1826 int http_base_proto = ff_is_http_proto(filename);
1828 if (http_base_proto) {
1829 AVIOContext *out = NULL;
1830 AVDictionary *http_opts = NULL;
1832 set_http_options(&http_opts, c);
1833 av_dict_set(&http_opts, "method", "DELETE", 0);
1835 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1836 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1839 av_dict_free(&http_opts);
1840 ff_format_io_close(s, &out);
1842 int res = avpriv_io_delete(filename);
1844 char errbuf[AV_ERROR_MAX_STRING_SIZE];
1845 av_strerror(res, errbuf, sizeof(errbuf));
1846 av_log(s, (res == AVERROR(ENOENT) ? AV_LOG_WARNING : AV_LOG_ERROR), "failed to delete %s: %s\n", filename, errbuf);
1851 static int dashenc_delete_segment_file(AVFormatContext *s, const char* file)
1853 DASHContext *c = s->priv_data;
1856 av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
1858 av_bprintf(&buf, "%s%s", c->dirname, file);
1859 if (!av_bprint_is_complete(&buf)) {
1860 av_bprint_finalize(&buf, NULL);
1861 av_log(s, AV_LOG_WARNING, "Out of memory for filename\n");
1862 return AVERROR(ENOMEM);
1865 dashenc_delete_file(s, buf.str);
1867 av_bprint_finalize(&buf, NULL);
1871 static inline void dashenc_delete_media_segments(AVFormatContext *s, OutputStream *os, int remove_count)
1873 for (int i = 0; i < remove_count; ++i) {
1874 dashenc_delete_segment_file(s, os->segments[i]->file);
1876 // Delete the segment regardless of whether the file was successfully deleted
1877 av_free(os->segments[i]);
1880 os->nb_segments -= remove_count;
1881 memmove(os->segments, os->segments + remove_count, os->nb_segments * sizeof(*os->segments));
1884 static int dash_flush(AVFormatContext *s, int final, int stream)
1886 DASHContext *c = s->priv_data;
1889 const char *proto = avio_find_protocol_name(s->url);
1890 int use_rename = proto && !strcmp(proto, "file");
1892 int cur_flush_segment_index = 0, next_exp_index = -1;
1894 cur_flush_segment_index = c->streams[stream].segment_index;
1896 //finding the next segment's expected index, based on the current pts value
1897 if (c->use_template && !c->use_timeline && c->index_correction &&
1898 c->streams[stream].last_pts != AV_NOPTS_VALUE &&
1899 c->streams[stream].first_pts != AV_NOPTS_VALUE) {
1900 int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts -
1901 c->streams[stream].first_pts,
1902 s->streams[stream]->time_base,
1904 next_exp_index = (pts_diff / c->streams[stream].seg_duration) + 1;
1908 for (i = 0; i < s->nb_streams; i++) {
1909 OutputStream *os = &c->streams[i];
1910 AVStream *st = s->streams[i];
1911 int range_length, index_length = 0;
1914 if (!os->packets_written)
1917 // Flush the single stream that got a keyframe right now.
1918 // Flush all audio streams as well, in sync with video keyframes,
1919 // but not the other video streams.
1920 if (stream >= 0 && i != stream) {
1921 if (s->streams[stream]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO &&
1922 s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1924 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1926 // Make sure we don't flush audio streams multiple times, when
1927 // all video streams are flushed one at a time.
1928 if (c->has_video && os->segment_index > cur_flush_segment_index)
1933 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1935 ret = flush_dynbuf(c, os, &range_length);
1938 os->packets_written = 0;
1940 if (c->single_file) {
1941 find_index_range(s, os->full_path, os->pos, &index_length);
1943 dashenc_io_close(s, &os->out, os->temp_path);
1946 ret = ff_rename(os->temp_path, os->full_path, os->ctx);
1952 duration = av_rescale_q(os->max_pts - os->start_pts, st->time_base, AV_TIME_BASE_Q);
1953 os->last_duration = FFMAX(os->last_duration, duration);
1955 if (!os->muxer_overhead && os->max_pts > os->start_pts)
1956 os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1957 8 * AV_TIME_BASE) / duration;
1958 os->total_pkt_size = 0;
1959 os->total_pkt_duration = 0;
1961 if (!os->bit_rate) {
1962 // calculate average bitrate of first segment
1963 int64_t bitrate = (int64_t) range_length * 8 * (c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE) / duration;
1965 os->bit_rate = bitrate;
1967 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index);
1968 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1970 os->pos += range_length;
1973 if (c->window_size) {
1974 for (i = 0; i < s->nb_streams; i++) {
1975 OutputStream *os = &c->streams[i];
1976 int remove_count = os->nb_segments - c->window_size - c->extra_window_size;
1977 if (remove_count > 0)
1978 dashenc_delete_media_segments(s, os, remove_count);
1983 for (i = 0; i < s->nb_streams; i++) {
1984 OutputStream *os = &c->streams[i];
1985 if (os->ctx && os->ctx_inited) {
1986 int64_t file_size = avio_tell(os->ctx->pb);
1987 av_write_trailer(os->ctx);
1988 if (c->global_sidx) {
1989 int j, start_index, start_number;
1990 int64_t sidx_size = avio_tell(os->ctx->pb) - file_size;
1991 get_start_index_number(os, c, &start_index, &start_number);
1992 if (start_index >= os->nb_segments ||
1993 os->segment_type != SEGMENT_TYPE_MP4)
1995 os->init_range_length += sidx_size;
1996 for (j = start_index; j < os->nb_segments; j++) {
1997 Segment *seg = os->segments[j];
1998 seg->start_pos += sidx_size;
2006 if (c->has_video && !final) {
2007 c->nr_of_streams_flushed++;
2008 if (c->nr_of_streams_flushed != c->nr_of_streams_to_flush)
2011 c->nr_of_streams_flushed = 0;
2013 ret = write_manifest(s, final);
2018 static int dash_parse_prft(DASHContext *c, AVPacket *pkt)
2020 OutputStream *os = &c->streams[pkt->stream_index];
2021 AVProducerReferenceTime *prft;
2024 prft = (AVProducerReferenceTime *)av_packet_get_side_data(pkt, AV_PKT_DATA_PRFT, &side_data_size);
2025 if (!prft || side_data_size != sizeof(AVProducerReferenceTime) || (prft->flags && prft->flags != 24)) {
2026 // No encoder generated or user provided capture time AVProducerReferenceTime side data. Instead
2027 // of letting the mov muxer generate one, do it here so we can also use it for the manifest.
2028 prft = (AVProducerReferenceTime *)av_packet_new_side_data(pkt, AV_PKT_DATA_PRFT,
2029 sizeof(AVProducerReferenceTime));
2031 return AVERROR(ENOMEM);
2032 prft->wallclock = av_gettime();
2035 if (os->first_pts == AV_NOPTS_VALUE) {
2036 os->producer_reference_time = *prft;
2037 if (c->target_latency_refid < 0)
2038 c->target_latency_refid = pkt->stream_index;
2044 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
2046 DASHContext *c = s->priv_data;
2047 AVStream *st = s->streams[pkt->stream_index];
2048 OutputStream *os = &c->streams[pkt->stream_index];
2049 AdaptationSet *as = &c->as[os->as_idx - 1];
2050 int64_t seg_end_duration, elapsed_duration;
2053 ret = update_stream_extradata(s, os, pkt, &st->avg_frame_rate);
2057 // Fill in a heuristic guess of the packet duration, if none is available.
2058 // The mp4 muxer will do something similar (for the last packet in a fragment)
2059 // if nothing is set (setting it for the other packets doesn't hurt).
2060 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
2061 // invoke its heuristic (this doesn't have to be identical to that algorithm),
2062 // so that we know the exact timestamps of fragments.
2063 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
2064 pkt->duration = pkt->dts - os->last_dts;
2065 os->last_dts = pkt->dts;
2067 // If forcing the stream to start at 0, the mp4 muxer will set the start
2068 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
2069 if (os->first_pts == AV_NOPTS_VALUE &&
2070 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
2071 pkt->pts -= pkt->dts;
2075 if (c->write_prft) {
2076 ret = dash_parse_prft(c, pkt);
2081 if (os->first_pts == AV_NOPTS_VALUE) {
2082 os->first_pts = pkt->pts;
2084 os->last_pts = pkt->pts;
2086 if (!c->availability_start_time[0]) {
2087 int64_t start_time_us = av_gettime();
2088 c->start_time_s = start_time_us / 1000000;
2089 format_date(c->availability_start_time,
2090 sizeof(c->availability_start_time), start_time_us);
2093 if (!os->packets_written)
2094 os->availability_time_offset = 0;
2096 if (!os->availability_time_offset &&
2097 ((os->frag_type == FRAG_TYPE_DURATION && os->seg_duration != os->frag_duration) ||
2098 (os->frag_type == FRAG_TYPE_EVERY_FRAME && pkt->duration))) {
2099 AdaptationSet *as = &c->as[os->as_idx - 1];
2100 int64_t frame_duration = 0;
2102 switch (os->frag_type) {
2103 case FRAG_TYPE_DURATION:
2104 frame_duration = os->frag_duration;
2106 case FRAG_TYPE_EVERY_FRAME:
2107 frame_duration = av_rescale_q(pkt->duration, st->time_base, AV_TIME_BASE_Q);
2111 os->availability_time_offset = ((double) os->seg_duration -
2112 frame_duration) / AV_TIME_BASE;
2113 as->max_frag_duration = FFMAX(frame_duration, as->max_frag_duration);
2116 if (c->use_template && !c->use_timeline) {
2117 elapsed_duration = pkt->pts - os->first_pts;
2118 seg_end_duration = (int64_t) os->segment_index * os->seg_duration;
2120 elapsed_duration = pkt->pts - os->start_pts;
2121 seg_end_duration = os->seg_duration;
2125 (os->frag_type == FRAG_TYPE_PFRAMES ||
2126 as->trick_idx >= 0)) {
2127 // Parse the packets only in scenarios where it's needed
2130 av_parser_parse2(os->parser, os->parser_avctx,
2131 &data, &size, pkt->data, pkt->size,
2132 pkt->pts, pkt->dts, pkt->pos);
2134 os->coding_dependency |= os->parser->pict_type != AV_PICTURE_TYPE_I;
2137 if (pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
2138 av_compare_ts(elapsed_duration, st->time_base,
2139 seg_end_duration, AV_TIME_BASE_Q) >= 0) {
2140 if (!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
2141 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
2144 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
2148 if ((!c->use_timeline || !c->use_template) && os->last_duration) {
2149 if (c->last_duration < os->last_duration*9/10 ||
2150 c->last_duration > os->last_duration*11/10) {
2151 av_log(s, AV_LOG_WARNING,
2152 "Segment durations differ too much, enable use_timeline "
2153 "and use_template, or keep a stricter keyframe interval\n");
2158 if (c->write_prft && os->producer_reference_time.wallclock && !os->producer_reference_time_str[0])
2159 format_date(os->producer_reference_time_str,
2160 sizeof(os->producer_reference_time_str),
2161 os->producer_reference_time.wallclock);
2163 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
2167 if (!os->packets_written) {
2168 // If we wrote a previous segment, adjust the start time of the segment
2169 // to the end of the previous one (which is the same as the mp4 muxer
2170 // does). This avoids gaps in the timeline.
2171 if (os->max_pts != AV_NOPTS_VALUE)
2172 os->start_pts = os->max_pts;
2174 os->start_pts = pkt->pts;
2176 if (os->max_pts == AV_NOPTS_VALUE)
2177 os->max_pts = pkt->pts + pkt->duration;
2179 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
2181 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
2182 os->frag_type == FRAG_TYPE_PFRAMES &&
2183 os->packets_written) {
2184 av_assert0(os->parser);
2185 if ((os->parser->pict_type == AV_PICTURE_TYPE_P &&
2186 st->codecpar->video_delay &&
2187 !(os->last_flags & AV_PKT_FLAG_KEY)) ||
2188 pkt->flags & AV_PKT_FLAG_KEY) {
2189 ret = av_write_frame(os->ctx, NULL);
2193 if (!os->availability_time_offset) {
2194 int64_t frag_duration = av_rescale_q(os->total_pkt_duration, st->time_base,
2196 os->availability_time_offset = ((double) os->seg_duration -
2197 frag_duration) / AV_TIME_BASE;
2198 as->max_frag_duration = FFMAX(frag_duration, as->max_frag_duration);
2203 if (pkt->flags & AV_PKT_FLAG_KEY && (os->packets_written || os->nb_segments) && !os->gop_size && as->trick_idx < 0) {
2204 os->gop_size = os->last_duration + av_rescale_q(os->total_pkt_duration, st->time_base, AV_TIME_BASE_Q);
2205 c->max_gop_size = FFMAX(c->max_gop_size, os->gop_size);
2208 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
2211 os->packets_written++;
2212 os->total_pkt_size += pkt->size;
2213 os->total_pkt_duration += pkt->duration;
2214 os->last_flags = pkt->flags;
2216 if (!os->init_range_length)
2217 flush_init_segment(s, os);
2219 //open the output context when the first frame of a segment is ready
2220 if (!c->single_file && os->packets_written == 1) {
2221 AVDictionary *opts = NULL;
2222 const char *proto = avio_find_protocol_name(s->url);
2223 int use_rename = proto && !strcmp(proto, "file");
2224 if (os->segment_type == SEGMENT_TYPE_MP4)
2225 write_styp(os->ctx->pb);
2226 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
2227 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
2228 os->media_seg_name, pkt->stream_index,
2229 os->segment_index, os->bit_rate, os->start_pts);
2230 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
2232 snprintf(os->temp_path, sizeof(os->temp_path),
2233 use_rename ? "%s.tmp" : "%s", os->full_path);
2234 set_http_options(&opts, c);
2235 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
2236 av_dict_free(&opts);
2238 return handle_io_open_error(s, ret, os->temp_path);
2241 char *prefetch_url = use_rename ? NULL : os->filename;
2242 write_hls_media_playlist(os, s, pkt->stream_index, 0, prefetch_url);
2246 //write out the data immediately in streaming mode
2247 if (c->streaming && os->segment_type == SEGMENT_TYPE_MP4) {
2249 uint8_t *buf = NULL;
2250 avio_flush(os->ctx->pb);
2251 len = avio_get_dyn_buf (os->ctx->pb, &buf);
2253 avio_write(os->out, buf + os->written_len, len - os->written_len);
2254 avio_flush(os->out);
2256 os->written_len = len;
2262 static int dash_write_trailer(AVFormatContext *s)
2264 DASHContext *c = s->priv_data;
2267 if (s->nb_streams > 0) {
2268 OutputStream *os = &c->streams[0];
2269 // If no segments have been written so far, try to do a crude
2270 // guess of the segment duration
2271 if (!c->last_duration)
2272 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
2273 s->streams[0]->time_base,
2275 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
2276 s->streams[0]->time_base,
2279 dash_flush(s, 1, -1);
2281 if (c->remove_at_exit) {
2282 for (i = 0; i < s->nb_streams; ++i) {
2283 OutputStream *os = &c->streams[i];
2284 dashenc_delete_media_segments(s, os, os->nb_segments);
2285 dashenc_delete_segment_file(s, os->initfile);
2286 if (c->hls_playlist && os->segment_type == SEGMENT_TYPE_MP4) {
2287 char filename[1024];
2288 get_hls_playlist_name(filename, sizeof(filename), c->dirname, i);
2289 dashenc_delete_file(s, filename);
2292 dashenc_delete_file(s, s->url);
2294 if (c->hls_playlist && c->master_playlist_created) {
2295 char filename[1024];
2296 snprintf(filename, sizeof(filename), "%s%s", c->dirname, c->hls_master_name);
2297 dashenc_delete_file(s, filename);
2304 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
2306 DASHContext *c = s->priv_data;
2307 OutputStream *os = &c->streams[avpkt->stream_index];
2308 AVFormatContext *oc = os->ctx;
2309 if (oc->oformat->check_bitstream) {
2311 AVPacket pkt = *avpkt;
2312 pkt.stream_index = 0;
2313 ret = oc->oformat->check_bitstream(oc, &pkt);
2315 AVStream *st = s->streams[avpkt->stream_index];
2316 AVStream *ost = oc->streams[0];
2317 st->internal->bsfc = ost->internal->bsfc;
2318 ost->internal->bsfc = NULL;
2325 #define OFFSET(x) offsetof(DASHContext, x)
2326 #define E AV_OPT_FLAG_ENCODING_PARAM
2327 static const AVOption options[] = {
2328 { "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 },
2329 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
2330 { "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 },
2331 #if FF_API_DASH_MIN_SEG_DURATION
2332 { "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 },
2334 { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
2335 { "frag_duration", "fragment duration (in seconds, fractional value can be set)", OFFSET(frag_duration), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT_MAX, E },
2336 { "frag_type", "set type of interval for fragments", OFFSET(frag_type), AV_OPT_TYPE_INT, {.i64 = FRAG_TYPE_NONE }, 0, FRAG_TYPE_NB - 1, E, "frag_type"},
2337 { "none", "one fragment per segment", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_NONE }, 0, UINT_MAX, E, "frag_type"},
2338 { "every_frame", "fragment at every frame", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_EVERY_FRAME }, 0, UINT_MAX, E, "frag_type"},
2339 { "duration", "fragment at specific time intervals", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_DURATION }, 0, UINT_MAX, E, "frag_type"},
2340 { "pframes", "fragment at keyframes and following P-Frame reordering (Video only, experimental)", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_PFRAMES }, 0, UINT_MAX, E, "frag_type"},
2341 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2342 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
2343 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
2344 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2345 { "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 },
2346 { "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 },
2347 { "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 },
2348 { "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 },
2349 { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
2350 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
2351 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
2352 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2353 { "hls_master_name", "HLS master playlist name", OFFSET(hls_master_name), AV_OPT_TYPE_STRING, {.str = "master.m3u8"}, 0, 0, E },
2354 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2355 { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
2356 { "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2357 { "format_options","set list of options for the container format (mp4/webm) used for dash", OFFSET(format_options), AV_OPT_TYPE_DICT, {.str = NULL}, 0, 0, E},
2358 { "global_sidx", "Write global SIDX atom. Applicable only for single file, mp4 output, non-streaming mode", OFFSET(global_sidx), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2359 { "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"},
2360 { "auto", "select segment file format based on codec", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_AUTO }, 0, UINT_MAX, E, "segment_type"},
2361 { "mp4", "make segment file in ISOBMFF format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MP4 }, 0, UINT_MAX, E, "segment_type"},
2362 { "webm", "make segment file in WebM format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_WEBM }, 0, UINT_MAX, E, "segment_type"},
2363 { "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 },
2364 { "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 },
2365 { "ldash", "Enable Low-latency dash. Constrains the value of a few elements", OFFSET(ldash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2366 { "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},
2367 { "write_prft", "Write producer reference time element", OFFSET(write_prft), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, E},
2368 { "mpd_profile", "Set profiles. Elements and values used in the manifest may be constrained by them", OFFSET(profile), AV_OPT_TYPE_FLAGS, {.i64 = MPD_PROFILE_DASH }, 0, UINT_MAX, E, "mpd_profile"},
2369 { "dash", "MPEG-DASH ISO Base media file format live profile", 0, AV_OPT_TYPE_CONST, {.i64 = MPD_PROFILE_DASH }, 0, UINT_MAX, E, "mpd_profile"},
2370 { "dvb_dash", "DVB-DASH profile", 0, AV_OPT_TYPE_CONST, {.i64 = MPD_PROFILE_DVB }, 0, UINT_MAX, E, "mpd_profile"},
2371 { "http_opts", "HTTP protocol options", OFFSET(http_opts), AV_OPT_TYPE_DICT, { .str = NULL }, 0, 0, E },
2372 { "target_latency", "Set desired target latency for Low-latency dash", OFFSET(target_latency), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT_MAX, E },
2373 { "min_playback_rate", "Set desired minimum playback rate", OFFSET(min_playback_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 1.0 }, 0.5, 1.5, E },
2374 { "max_playback_rate", "Set desired maximum playback rate", OFFSET(max_playback_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 1.0 }, 0.5, 1.5, E },
2378 static const AVClass dash_class = {
2379 .class_name = "dash muxer",
2380 .item_name = av_default_item_name,
2382 .version = LIBAVUTIL_VERSION_INT,
2385 AVOutputFormat ff_dash_muxer = {
2387 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
2388 .extensions = "mpd",
2389 .priv_data_size = sizeof(DASHContext),
2390 .audio_codec = AV_CODEC_ID_AAC,
2391 .video_codec = AV_CODEC_ID_H264,
2392 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
2394 .write_header = dash_write_header,
2395 .write_packet = dash_write_packet,
2396 .write_trailer = dash_write_trailer,
2397 .deinit = dash_free,
2398 .check_bitstream = dash_check_bitstream,
2399 .priv_class = &dash_class,