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 int first_segment_bit_rate;
119 SegmentType segment_type; /* segment type selected for this particular stream */
120 const char *format_name;
121 const char *extension_name;
122 const char *single_file_name; /* file names selected for this particular stream */
123 const char *init_seg_name;
124 const char *media_seg_name;
129 char full_path[1024];
130 char temp_path[1024];
131 double availability_time_offset;
132 AVProducerReferenceTime producer_reference_time;
133 char producer_reference_time_str[100];
135 int64_t total_pkt_duration;
140 int coding_dependency;
143 typedef struct DASHContext {
144 const AVClass *class; /* Class for private options. */
145 char *adaptation_sets;
149 int extra_window_size;
150 int64_t seg_duration;
151 int64_t frag_duration;
156 OutputStream *streams;
158 int64_t last_duration;
159 int64_t total_duration;
160 char availability_start_time[100];
162 int64_t presentation_time_offset;
164 const char *single_file_name; /* file names as specified in options */
165 const char *init_seg_name;
166 const char *media_seg_name;
167 const char *utc_timing_url;
169 const char *user_agent;
170 AVDictionary *http_opts;
172 const char *hls_master_name;
174 int master_playlist_created;
175 AVIOContext *mpd_out;
176 AVIOContext *m3u8_out;
179 int index_correction;
180 AVDictionary *format_options;
182 SegmentType segment_type_option; /* segment type as specified in options */
183 int ignore_io_errors;
186 int master_publish_rate;
187 int nr_of_streams_to_flush;
188 int nr_of_streams_flushed;
191 int64_t max_gop_size;
192 int64_t max_segment_duration;
194 int64_t target_latency;
195 int target_latency_refid;
196 AVRational min_playback_rate;
197 AVRational max_playback_rate;
198 int64_t update_period;
201 static struct codec_string {
205 { AV_CODEC_ID_VP8, "vp8" },
206 { AV_CODEC_ID_VP9, "vp9" },
207 { AV_CODEC_ID_VORBIS, "vorbis" },
208 { AV_CODEC_ID_OPUS, "opus" },
209 { AV_CODEC_ID_FLAC, "flac" },
213 static struct format_string {
214 SegmentType segment_type;
217 { SEGMENT_TYPE_AUTO, "auto" },
218 { SEGMENT_TYPE_MP4, "mp4" },
219 { SEGMENT_TYPE_WEBM, "webm" },
223 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
224 AVDictionary **options) {
225 DASHContext *c = s->priv_data;
226 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
227 int err = AVERROR_MUXER_NOT_FOUND;
228 if (!*pb || !http_base_proto || !c->http_persistent) {
229 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
230 #if CONFIG_HTTP_PROTOCOL
232 URLContext *http_url_context = ffio_geturlcontext(*pb);
233 av_assert0(http_url_context);
234 err = ff_http_do_new_request(http_url_context, filename);
236 ff_format_io_close(s, pb);
242 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
243 DASHContext *c = s->priv_data;
244 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
249 if (!http_base_proto || !c->http_persistent) {
250 ff_format_io_close(s, pb);
251 #if CONFIG_HTTP_PROTOCOL
253 URLContext *http_url_context = ffio_geturlcontext(*pb);
254 av_assert0(http_url_context);
256 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
261 static const char *get_format_str(SegmentType segment_type) {
263 for (i = 0; i < SEGMENT_TYPE_NB; i++)
264 if (formats[i].segment_type == segment_type)
265 return formats[i].str;
269 static const char *get_extension_str(SegmentType type, int single_file)
273 case SEGMENT_TYPE_MP4: return single_file ? "mp4" : "m4s";
274 case SEGMENT_TYPE_WEBM: return "webm";
275 default: return NULL;
279 static int handle_io_open_error(AVFormatContext *s, int err, char *url) {
280 DASHContext *c = s->priv_data;
281 char errbuf[AV_ERROR_MAX_STRING_SIZE];
282 av_strerror(err, errbuf, sizeof(errbuf));
283 av_log(s, c->ignore_io_errors ? AV_LOG_WARNING : AV_LOG_ERROR,
284 "Unable to open %s for writing: %s\n", url, errbuf);
285 return c->ignore_io_errors ? 0 : err;
288 static inline SegmentType select_segment_type(SegmentType segment_type, enum AVCodecID codec_id)
290 if (segment_type == SEGMENT_TYPE_AUTO) {
291 if (codec_id == AV_CODEC_ID_OPUS || codec_id == AV_CODEC_ID_VORBIS ||
292 codec_id == AV_CODEC_ID_VP8 || codec_id == AV_CODEC_ID_VP9) {
293 segment_type = SEGMENT_TYPE_WEBM;
295 segment_type = SEGMENT_TYPE_MP4;
302 static int init_segment_types(AVFormatContext *s)
304 DASHContext *c = s->priv_data;
305 int has_mp4_streams = 0;
306 for (int i = 0; i < s->nb_streams; ++i) {
307 OutputStream *os = &c->streams[i];
308 SegmentType segment_type = select_segment_type(
309 c->segment_type_option, s->streams[i]->codecpar->codec_id);
310 os->segment_type = segment_type;
311 os->format_name = get_format_str(segment_type);
312 if (!os->format_name) {
313 av_log(s, AV_LOG_ERROR, "Could not select DASH segment type for stream %d\n", i);
314 return AVERROR_MUXER_NOT_FOUND;
316 os->extension_name = get_extension_str(segment_type, c->single_file);
317 if (!os->extension_name) {
318 av_log(s, AV_LOG_ERROR, "Could not get extension type for stream %d\n", i);
319 return AVERROR_MUXER_NOT_FOUND;
322 has_mp4_streams |= segment_type == SEGMENT_TYPE_MP4;
325 if (c->hls_playlist && !has_mp4_streams) {
326 av_log(s, AV_LOG_WARNING, "No mp4 streams, disabling HLS manifest generation\n");
333 static int check_file_extension(const char *filename, const char *extension) {
335 if (!filename || !extension)
337 dot = strrchr(filename, '.');
338 if (dot && !strcmp(dot + 1, extension))
343 static void set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par,
344 AVRational *frame_rate, char *str, int size) {
346 int ret = ff_isom_get_vpcc_features(s, par, frame_rate, &vpcc);
348 av_strlcatf(str, size, "vp09.%02d.%02d.%02d",
349 vpcc.profile, vpcc.level, vpcc.bitdepth);
351 // Default to just vp9 in case of error while finding out profile or level
352 av_log(s, AV_LOG_WARNING, "Could not find VP9 profile and/or level\n");
353 av_strlcpy(str, "vp9", size);
358 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
359 AVRational *frame_rate, char *str, int size)
361 const AVCodecTag *tags[2] = { NULL, NULL };
365 // common Webm codecs are not part of RFC 6381
366 for (i = 0; codecs[i].id; i++)
367 if (codecs[i].id == par->codec_id) {
368 if (codecs[i].id == AV_CODEC_ID_VP9) {
369 set_vp9_codec_str(s, par, frame_rate, str, size);
371 av_strlcpy(str, codecs[i].str, size);
376 // for codecs part of RFC 6381
377 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
378 tags[0] = ff_codec_movvideo_tags;
379 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
380 tags[0] = ff_codec_movaudio_tags;
384 tag = par->codec_tag;
386 tag = av_codec_get_tag(tags, par->codec_id);
394 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
396 tags[0] = ff_mp4_obj_type;
397 oti = av_codec_get_tag(tags, par->codec_id);
399 av_strlcatf(str, size, ".%02"PRIx32, oti);
403 if (tag == MKTAG('m', 'p', '4', 'a')) {
404 if (par->extradata_size >= 2) {
405 int aot = par->extradata[0] >> 3;
407 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
408 av_strlcatf(str, size, ".%d", aot);
410 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
411 // Unimplemented, should output ProfileLevelIndication as a decimal number
412 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
414 } else if (!strcmp(str, "avc1")) {
415 uint8_t *tmpbuf = NULL;
416 uint8_t *extradata = par->extradata;
417 int extradata_size = par->extradata_size;
420 if (extradata[0] != 1) {
422 if (avio_open_dyn_buf(&pb) < 0)
424 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
425 ffio_free_dyn_buf(&pb);
428 extradata_size = avio_close_dyn_buf(pb, &extradata);
432 if (extradata_size >= 4)
433 av_strlcatf(str, size, ".%02x%02x%02x",
434 extradata[1], extradata[2], extradata[3]);
436 } else if (!strcmp(str, "av01")) {
437 AV1SequenceParameters seq;
438 if (!par->extradata_size)
440 if (ff_av1_parse_seq_header(&seq, par->extradata, par->extradata_size) < 0)
443 av_strlcatf(str, size, ".%01u.%02u%s.%02u",
444 seq.profile, seq.level, seq.tier ? "H" : "M", seq.bitdepth);
445 if (seq.color_description_present_flag)
446 av_strlcatf(str, size, ".%01u.%01u%01u%01u.%02u.%02u.%02u.%01u",
448 seq.chroma_subsampling_x, seq.chroma_subsampling_y, seq.chroma_sample_position,
449 seq.color_primaries, seq.transfer_characteristics, seq.matrix_coefficients,
454 static int flush_dynbuf(DASHContext *c, OutputStream *os, int *range_length)
459 return AVERROR(EINVAL);
463 av_write_frame(os->ctx, NULL);
464 avio_flush(os->ctx->pb);
466 if (!c->single_file) {
468 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
471 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
476 return avio_open_dyn_buf(&os->ctx->pb);
478 *range_length = avio_tell(os->ctx->pb) - os->pos;
483 static void set_http_options(AVDictionary **options, DASHContext *c)
486 av_dict_set(options, "method", c->method, 0);
487 av_dict_copy(options, c->http_opts, 0);
489 av_dict_set(options, "user_agent", c->user_agent, 0);
490 if (c->http_persistent)
491 av_dict_set_int(options, "multiple_requests", 1, 0);
493 av_dict_set_int(options, "timeout", c->timeout, 0);
496 static void get_hls_playlist_name(char *playlist_name, int string_size,
497 const char *base_url, int id) {
499 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
501 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
504 static void get_start_index_number(OutputStream *os, DASHContext *c,
505 int *start_index, int *start_number) {
508 if (c->window_size) {
509 *start_index = FFMAX(os->nb_segments - c->window_size, 0);
510 *start_number = FFMAX(os->segment_index - c->window_size, 1);
514 static void write_hls_media_playlist(OutputStream *os, AVFormatContext *s,
515 int representation_id, int final,
516 char *prefetch_url) {
517 DASHContext *c = s->priv_data;
518 int timescale = os->ctx->streams[0]->time_base.den;
519 char temp_filename_hls[1024];
520 char filename_hls[1024];
521 AVDictionary *http_opts = NULL;
522 int target_duration = 0;
524 const char *proto = avio_find_protocol_name(c->dirname);
525 int use_rename = proto && !strcmp(proto, "file");
526 int i, start_index, start_number;
527 double prog_date_time = 0;
529 get_start_index_number(os, c, &start_index, &start_number);
531 if (!c->hls_playlist || start_index >= os->nb_segments ||
532 os->segment_type != SEGMENT_TYPE_MP4)
535 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
536 c->dirname, representation_id);
538 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
540 set_http_options(&http_opts, c);
541 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
542 av_dict_free(&http_opts);
544 handle_io_open_error(s, ret, temp_filename_hls);
547 for (i = start_index; i < os->nb_segments; i++) {
548 Segment *seg = os->segments[i];
549 double duration = (double) seg->duration / timescale;
550 if (target_duration <= duration)
551 target_duration = lrint(duration);
554 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
555 start_number, PLAYLIST_TYPE_NONE, 0);
557 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
558 os->init_range_length, os->init_start_pos);
560 for (i = start_index; i < os->nb_segments; i++) {
561 Segment *seg = os->segments[i];
563 if (prog_date_time == 0) {
564 if (os->nb_segments == 1)
565 prog_date_time = c->start_time_s;
567 prog_date_time = seg->prog_date_time;
569 seg->prog_date_time = prog_date_time;
571 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
572 (double) seg->duration / timescale, 0,
573 seg->range_length, seg->start_pos, NULL,
574 c->single_file ? os->initfile : seg->file,
575 &prog_date_time, 0, 0, 0);
577 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
582 avio_printf(c->m3u8_out, "#EXT-X-PREFETCH:%s\n", prefetch_url);
585 ff_hls_write_end_list(c->m3u8_out);
587 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
590 ff_rename(temp_filename_hls, filename_hls, os->ctx);
593 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
595 DASHContext *c = s->priv_data;
596 int ret, range_length;
598 ret = flush_dynbuf(c, os, &range_length);
602 os->pos = os->init_range_length = range_length;
603 if (!c->single_file) {
605 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
606 dashenc_io_close(s, &os->out, filename);
611 static void dash_free(AVFormatContext *s)
613 DASHContext *c = s->priv_data;
617 for (i = 0; i < c->nb_as; i++) {
618 av_dict_free(&c->as[i].metadata);
619 av_freep(&c->as[i].descriptor);
627 for (i = 0; i < s->nb_streams; i++) {
628 OutputStream *os = &c->streams[i];
629 if (os->ctx && os->ctx->pb) {
631 ffio_free_dyn_buf(&os->ctx->pb);
633 avio_close(os->ctx->pb);
635 ff_format_io_close(s, &os->out);
636 avformat_free_context(os->ctx);
637 avcodec_free_context(&os->parser_avctx);
638 av_parser_close(os->parser);
639 for (j = 0; j < os->nb_segments; j++)
640 av_free(os->segments[j]);
641 av_free(os->segments);
642 av_freep(&os->single_file_name);
643 av_freep(&os->init_seg_name);
644 av_freep(&os->media_seg_name);
646 av_freep(&c->streams);
648 ff_format_io_close(s, &c->mpd_out);
649 ff_format_io_close(s, &c->m3u8_out);
652 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
653 int representation_id, int final)
655 DASHContext *c = s->priv_data;
656 int i, start_index, start_number;
657 get_start_index_number(os, c, &start_index, &start_number);
659 if (c->use_template) {
660 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
661 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
662 if (!c->use_timeline) {
663 avio_printf(out, "duration=\"%"PRId64"\" ", os->seg_duration);
664 if (c->streaming && os->availability_time_offset)
665 avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
666 os->availability_time_offset);
668 if (c->streaming && os->availability_time_offset && !final)
669 avio_printf(out, "availabilityTimeComplete=\"false\" ");
671 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\"", os->init_seg_name, os->media_seg_name, c->use_timeline ? start_number : 1);
672 if (c->presentation_time_offset)
673 avio_printf(out, " presentationTimeOffset=\"%"PRId64"\"", c->presentation_time_offset);
674 avio_printf(out, ">\n");
675 if (c->use_timeline) {
676 int64_t cur_time = 0;
677 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
678 for (i = start_index; i < os->nb_segments; ) {
679 Segment *seg = os->segments[i];
681 avio_printf(out, "\t\t\t\t\t\t<S ");
682 if (i == start_index || seg->time != cur_time) {
683 cur_time = seg->time;
684 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
686 avio_printf(out, "d=\"%"PRId64"\" ", seg->duration);
687 while (i + repeat + 1 < os->nb_segments &&
688 os->segments[i + repeat + 1]->duration == seg->duration &&
689 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
692 avio_printf(out, "r=\"%d\" ", repeat);
693 avio_printf(out, "/>\n");
695 cur_time += (1 + repeat) * seg->duration;
697 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
699 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
700 } else if (c->single_file) {
701 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
702 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);
703 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);
704 for (i = start_index; i < os->nb_segments; i++) {
705 Segment *seg = os->segments[i];
706 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
707 if (seg->index_length)
708 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
709 avio_printf(out, "/>\n");
711 avio_printf(out, "\t\t\t\t</SegmentList>\n");
713 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);
714 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
715 for (i = start_index; i < os->nb_segments; i++) {
716 Segment *seg = os->segments[i];
717 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
719 avio_printf(out, "\t\t\t\t</SegmentList>\n");
721 if (!c->lhls || final) {
722 write_hls_media_playlist(os, s, representation_id, final, NULL);
727 static char *xmlescape(const char *str) {
728 int outlen = strlen(str)*3/2 + 6;
729 char *out = av_realloc(NULL, outlen + 1);
733 for (; *str; str++) {
734 if (pos + 6 > outlen) {
736 outlen = 2 * outlen + 6;
737 tmp = av_realloc(out, outlen + 1);
745 memcpy(&out[pos], "&", 5);
747 } else if (*str == '<') {
748 memcpy(&out[pos], "<", 4);
750 } else if (*str == '>') {
751 memcpy(&out[pos], ">", 4);
753 } else if (*str == '\'') {
754 memcpy(&out[pos], "'", 6);
756 } else if (*str == '\"') {
757 memcpy(&out[pos], """, 6);
767 static void write_time(AVIOContext *out, int64_t time)
769 int seconds = time / AV_TIME_BASE;
770 int fractions = time % AV_TIME_BASE;
771 int minutes = seconds / 60;
772 int hours = minutes / 60;
775 avio_printf(out, "PT");
777 avio_printf(out, "%dH", hours);
778 if (hours || minutes)
779 avio_printf(out, "%dM", minutes);
780 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
783 static void format_date(char *buf, int size, int64_t time_us)
785 struct tm *ptm, tmbuf;
786 int64_t time_ms = time_us / 1000;
787 const time_t time_s = time_ms / 1000;
788 int millisec = time_ms - (time_s * 1000);
789 ptm = gmtime_r(&time_s, &tmbuf);
792 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%S", ptm)) {
797 snprintf(buf + len, size - len, ".%03dZ", millisec);
801 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
804 DASHContext *c = s->priv_data;
805 AdaptationSet *as = &c->as[as_index];
806 AVDictionaryEntry *lang, *role;
809 avio_printf(out, "\t\t<AdaptationSet id=\"%d\" contentType=\"%s\" startWithSAP=\"1\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
810 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
811 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)
812 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
813 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))
814 avio_printf(out, " frameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
815 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
816 avio_printf(out, " maxWidth=\"%d\" maxHeight=\"%d\"", as->max_width, as->max_height);
817 avio_printf(out, " par=\"%d:%d\"", as->par.num, as->par.den);
819 lang = av_dict_get(as->metadata, "language", NULL, 0);
821 avio_printf(out, " lang=\"%s\"", lang->value);
822 avio_printf(out, ">\n");
824 if (!final && c->ldash && as->max_frag_duration && !(c->profile & MPD_PROFILE_DVB))
825 avio_printf(out, "\t\t\t<Resync dT=\"%"PRId64"\" type=\"0\"/>\n", as->max_frag_duration);
826 if (as->trick_idx >= 0)
827 avio_printf(out, "\t\t\t<EssentialProperty id=\"%d\" schemeIdUri=\"http://dashif.org/guidelines/trickmode\" value=\"%d\"/>\n", as->id, as->trick_idx);
828 role = av_dict_get(as->metadata, "role", NULL, 0);
830 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
832 avio_printf(out, "\t\t\t%s\n", as->descriptor);
833 for (i = 0; i < s->nb_streams; i++) {
834 AVStream *st = s->streams[i];
835 OutputStream *os = &c->streams[i];
836 char bandwidth_str[64] = {'\0'};
838 if (os->as_idx - 1 != as_index)
841 if (os->bit_rate > 0)
842 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"", os->bit_rate);
844 int average_bit_rate = os->pos * 8 * AV_TIME_BASE / c->total_duration;
845 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"", average_bit_rate);
846 } else if (os->first_segment_bit_rate > 0)
847 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"", os->first_segment_bit_rate);
849 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
850 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
851 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
852 if (st->codecpar->field_order == AV_FIELD_UNKNOWN)
853 avio_printf(out, " scanType=\"unknown\"");
854 else if (st->codecpar->field_order != AV_FIELD_PROGRESSIVE)
855 avio_printf(out, " scanType=\"interlaced\"");
856 avio_printf(out, " sar=\"%d:%d\"", os->sar.num, os->sar.den);
857 if (st->avg_frame_rate.num && av_cmp_q(as->min_frame_rate, as->max_frame_rate) < 0)
858 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
859 if (as->trick_idx >= 0) {
860 AdaptationSet *tas = &c->as[as->trick_idx];
861 if (!as->ambiguous_frame_rate && !tas->ambiguous_frame_rate)
862 avio_printf(out, " maxPlayoutRate=\"%d\"", FFMAX((int)av_q2d(av_div_q(tas->min_frame_rate, as->min_frame_rate)), 1));
864 if (!os->coding_dependency)
865 avio_printf(out, " codingDependency=\"false\"");
866 avio_printf(out, ">\n");
868 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
869 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
870 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
871 s->streams[i]->codecpar->channels);
873 if (!final && c->write_prft && os->producer_reference_time_str[0]) {
874 avio_printf(out, "\t\t\t\t<ProducerReferenceTime id=\"%d\" inband=\"true\" type=\"%s\" wallClockTime=\"%s\" presentationTime=\"%"PRId64"\">\n",
875 i, os->producer_reference_time.flags ? "captured" : "encoder", os->producer_reference_time_str, c->presentation_time_offset);
876 avio_printf(out, "\t\t\t\t\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
877 avio_printf(out, "\t\t\t\t</ProducerReferenceTime>\n");
879 if (!final && c->ldash && os->gop_size && os->frag_type != FRAG_TYPE_NONE && !(c->profile & MPD_PROFILE_DVB) &&
880 (os->frag_type != FRAG_TYPE_DURATION || os->frag_duration != os->seg_duration))
881 avio_printf(out, "\t\t\t\t<Resync dT=\"%"PRId64"\" type=\"1\"/>\n", os->gop_size);
882 output_segment_list(os, out, s, i, final);
883 avio_printf(out, "\t\t\t</Representation>\n");
885 avio_printf(out, "\t\t</AdaptationSet>\n");
890 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
892 DASHContext *c = s->priv_data;
895 if (c->profile & MPD_PROFILE_DVB && (c->nb_as + 1) > 16) {
896 av_log(s, AV_LOG_ERROR, "DVB-DASH profile allows a max of 16 Adaptation Sets\n");
897 return AVERROR(EINVAL);
899 mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
901 return AVERROR(ENOMEM);
905 *as = &c->as[c->nb_as - 1];
906 memset(*as, 0, sizeof(**as));
907 (*as)->media_type = type;
908 (*as)->frag_type = -1;
909 (*as)->trick_idx = -1;
914 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
916 DASHContext *c = s->priv_data;
917 AdaptationSet *as = &c->as[as_idx - 1];
918 OutputStream *os = &c->streams[i];
920 if (as->media_type != s->streams[i]->codecpar->codec_type) {
921 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
922 return AVERROR(EINVAL);
923 } else if (os->as_idx) {
924 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
925 return AVERROR(EINVAL);
927 if (c->profile & MPD_PROFILE_DVB && (as->nb_streams + 1) > 16) {
928 av_log(s, AV_LOG_ERROR, "DVB-DASH profile allows a max of 16 Representations per Adaptation Set\n");
929 return AVERROR(EINVAL);
937 static int parse_adaptation_sets(AVFormatContext *s)
939 DASHContext *c = s->priv_data;
940 const char *p = c->adaptation_sets;
941 enum { new_set, parse_default, parsing_streams, parse_seg_duration, parse_frag_duration } state;
945 // default: one AdaptationSet for each stream
947 for (i = 0; i < s->nb_streams; i++) {
948 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
952 c->streams[i].as_idx = c->nb_as;
958 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
959 // option id=0,descriptor=descriptor_str,streams=0,1,2 and so on
960 // option id=0,seg_duration=2.5,frag_duration=0.5,streams=0,1,2
961 // id=1,trick_id=0,seg_duration=10,frag_type=none,streams=3 and so on
962 // descriptor is useful to the scheme defined by ISO/IEC 23009-1:2014/Amd.2:2015
963 // descriptor_str should be a self-closing xml tag.
964 // seg_duration and frag_duration have the same syntax as the global options of
965 // the same name, and the former have precedence over them if set.
971 } else if (state == new_set && av_strstart(p, "id=", &p)) {
972 char id_str[10], *end_str;
975 snprintf(id_str, sizeof(id_str), "%.*s", n, p);
977 i = strtol(id_str, &end_str, 10);
978 if (id_str == end_str || i < 0 || i > c->nb_as) {
979 av_log(s, AV_LOG_ERROR, "\"%s\" is not a valid value for an AdaptationSet id\n", id_str);
980 return AVERROR(EINVAL);
983 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
990 state = parse_default;
991 } else if (state != new_set && av_strstart(p, "seg_duration=", &p)) {
992 state = parse_seg_duration;
993 } else if (state != new_set && av_strstart(p, "frag_duration=", &p)) {
994 state = parse_frag_duration;
995 } else if (state == parse_seg_duration || state == parse_frag_duration) {
1000 snprintf(str, sizeof(str), "%.*s", n, p);
1005 ret = av_parse_time(&usecs, str, 1);
1007 av_log(s, AV_LOG_ERROR, "Unable to parse option value \"%s\" as duration\n", str);
1011 if (state == parse_seg_duration)
1012 as->seg_duration = usecs;
1014 as->frag_duration = usecs;
1015 state = parse_default;
1016 } else if (state != new_set && av_strstart(p, "frag_type=", &p)) {
1019 n = strcspn(p, ",");
1020 snprintf(type_str, sizeof(type_str), "%.*s", n, p);
1025 if (!strcmp(type_str, "duration"))
1026 as->frag_type = FRAG_TYPE_DURATION;
1027 else if (!strcmp(type_str, "pframes"))
1028 as->frag_type = FRAG_TYPE_PFRAMES;
1029 else if (!strcmp(type_str, "every_frame"))
1030 as->frag_type = FRAG_TYPE_EVERY_FRAME;
1031 else if (!strcmp(type_str, "none"))
1032 as->frag_type = FRAG_TYPE_NONE;
1034 av_log(s, AV_LOG_ERROR, "Unable to parse option value \"%s\" as fragment type\n", type_str);
1037 state = parse_default;
1038 } else if (state != new_set && av_strstart(p, "descriptor=", &p)) {
1039 n = strcspn(p, ">") + 1; //followed by one comma, so plus 1
1040 if (n < strlen(p)) {
1041 as->descriptor = av_strndup(p, n);
1043 av_log(s, AV_LOG_ERROR, "Parse error, descriptor string should be a self-closing xml tag\n");
1044 return AVERROR(EINVAL);
1049 state = parse_default;
1050 } else if ((state != new_set) && av_strstart(p, "trick_id=", &p)) {
1051 char trick_id_str[10], *end_str;
1053 n = strcspn(p, ",");
1054 snprintf(trick_id_str, sizeof(trick_id_str), "%.*s", n, p);
1057 as->trick_idx = strtol(trick_id_str, &end_str, 10);
1058 if (trick_id_str == end_str || as->trick_idx < 0)
1059 return AVERROR(EINVAL);
1063 state = parse_default;
1064 } else if ((state != new_set) && av_strstart(p, "streams=", &p)) { //descriptor and durations are optional
1065 state = parsing_streams;
1066 } else if (state == parsing_streams) {
1067 AdaptationSet *as = &c->as[c->nb_as - 1];
1068 char idx_str[8], *end_str;
1070 n = strcspn(p, " ,");
1071 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
1074 // if value is "a" or "v", map all streams of that type
1075 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
1076 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
1077 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
1079 for (i = 0; i < s->nb_streams; i++) {
1080 if (s->streams[i]->codecpar->codec_type != type)
1083 as->media_type = s->streams[i]->codecpar->codec_type;
1085 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
1088 } else { // select single stream
1089 i = strtol(idx_str, &end_str, 10);
1090 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
1091 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
1092 return AVERROR(EINVAL);
1094 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
1096 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
1097 as->media_type = s->streams[i]->codecpar->codec_type;
1100 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
1109 return AVERROR(EINVAL);
1114 // check for unassigned streams
1115 for (i = 0; i < s->nb_streams; i++) {
1116 OutputStream *os = &c->streams[i];
1118 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
1119 return AVERROR(EINVAL);
1123 // check references for trick mode AdaptationSet
1124 for (i = 0; i < c->nb_as; i++) {
1126 if (as->trick_idx < 0)
1128 for (n = 0; n < c->nb_as; n++) {
1129 if (c->as[n].id == as->trick_idx)
1132 if (n >= c->nb_as) {
1133 av_log(s, AV_LOG_ERROR, "reference AdaptationSet id \"%d\" not found for trick mode AdaptationSet id \"%d\"\n", as->trick_idx, as->id);
1134 return AVERROR(EINVAL);
1141 static int write_manifest(AVFormatContext *s, int final)
1143 DASHContext *c = s->priv_data;
1145 char temp_filename[1024];
1147 const char *proto = avio_find_protocol_name(s->url);
1148 int use_rename = proto && !strcmp(proto, "file");
1149 static unsigned int warned_non_file = 0;
1150 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
1151 AVDictionary *opts = NULL;
1153 if (!use_rename && !warned_non_file++)
1154 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
1156 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
1157 set_http_options(&opts, c);
1158 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
1159 av_dict_free(&opts);
1161 return handle_io_open_error(s, ret, temp_filename);
1164 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
1165 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
1166 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
1167 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
1168 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
1170 if (c->profile & MPD_PROFILE_DASH)
1171 avio_printf(out, "%s%s", "urn:mpeg:dash:profile:isoff-live:2011", c->profile & MPD_PROFILE_DVB ? "," : "\"\n");
1172 if (c->profile & MPD_PROFILE_DVB)
1173 avio_printf(out, "%s", "urn:dvb:dash:profile:dvb-dash:2014\"\n");
1174 avio_printf(out, "\ttype=\"%s\"\n",
1175 final ? "static" : "dynamic");
1177 avio_printf(out, "\tmediaPresentationDuration=\"");
1178 write_time(out, c->total_duration);
1179 avio_printf(out, "\"\n");
1181 int64_t update_period = c->last_duration / AV_TIME_BASE;
1183 if (c->use_template && !c->use_timeline)
1184 update_period = 500;
1185 if (c->update_period)
1186 update_period = c->update_period;
1187 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
1189 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
1190 if (c->availability_start_time[0])
1191 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
1192 format_date(now_str, sizeof(now_str), av_gettime());
1194 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
1195 if (c->window_size && c->use_template) {
1196 avio_printf(out, "\ttimeShiftBufferDepth=\"");
1197 write_time(out, c->last_duration * c->window_size);
1198 avio_printf(out, "\"\n");
1201 avio_printf(out, "\tmaxSegmentDuration=\"");
1202 write_time(out, c->max_segment_duration);
1203 avio_printf(out, "\"\n");
1204 avio_printf(out, "\tminBufferTime=\"");
1205 write_time(out, c->ldash && c->max_gop_size ? c->max_gop_size : c->last_duration * 2);
1206 avio_printf(out, "\">\n");
1207 avio_printf(out, "\t<ProgramInformation>\n");
1209 char *escaped = xmlescape(title->value);
1210 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
1213 avio_printf(out, "\t</ProgramInformation>\n");
1215 avio_printf(out, "\t<ServiceDescription id=\"0\">\n");
1216 if (!final && c->target_latency && c->target_latency_refid >= 0) {
1217 avio_printf(out, "\t\t<Latency target=\"%"PRId64"\"", c->target_latency / 1000);
1218 if (s->nb_streams > 1)
1219 avio_printf(out, " referenceId=\"%d\"", c->target_latency_refid);
1220 avio_printf(out, "/>\n");
1222 if (av_cmp_q(c->min_playback_rate, (AVRational) {1, 1}) ||
1223 av_cmp_q(c->max_playback_rate, (AVRational) {1, 1}))
1224 avio_printf(out, "\t\t<PlaybackRate min=\"%.2f\" max=\"%.2f\"/>\n",
1225 av_q2d(c->min_playback_rate), av_q2d(c->max_playback_rate));
1226 avio_printf(out, "\t</ServiceDescription>\n");
1228 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
1229 OutputStream *os = &c->streams[0];
1230 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
1231 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
1232 avio_printf(out, "\t<Period id=\"0\" start=\"");
1233 write_time(out, start_time);
1234 avio_printf(out, "\">\n");
1236 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
1239 for (i = 0; i < c->nb_as; i++) {
1240 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
1243 avio_printf(out, "\t</Period>\n");
1245 if (c->utc_timing_url)
1246 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
1248 avio_printf(out, "</MPD>\n");
1250 dashenc_io_close(s, &c->mpd_out, temp_filename);
1253 if ((ret = ff_rename(temp_filename, s->url, s)) < 0)
1257 if (c->hls_playlist) {
1258 char filename_hls[1024];
1259 const char *audio_group = "A1";
1260 char audio_codec_str[128] = "\0";
1262 int max_audio_bitrate = 0;
1264 // Publish master playlist only the configured rate
1265 if (c->master_playlist_created && (!c->master_publish_rate ||
1266 c->streams[0].segment_index % c->master_publish_rate))
1270 snprintf(filename_hls, sizeof(filename_hls), "%s%s", c->dirname, c->hls_master_name);
1272 snprintf(filename_hls, sizeof(filename_hls), "%s", c->hls_master_name);
1274 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
1276 set_http_options(&opts, c);
1277 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename, &opts);
1278 av_dict_free(&opts);
1280 return handle_io_open_error(s, ret, temp_filename);
1283 ff_hls_write_playlist_version(c->m3u8_out, 7);
1285 for (i = 0; i < s->nb_streams; i++) {
1286 char playlist_file[64];
1287 AVStream *st = s->streams[i];
1288 OutputStream *os = &c->streams[i];
1289 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1291 if (os->segment_type != SEGMENT_TYPE_MP4)
1293 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1294 ff_hls_write_audio_rendition(c->m3u8_out, (char *)audio_group,
1295 playlist_file, NULL, i, is_default);
1296 max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
1297 os->muxer_overhead, max_audio_bitrate);
1298 if (!av_strnstr(audio_codec_str, os->codec_str, sizeof(audio_codec_str))) {
1299 if (strlen(audio_codec_str))
1300 av_strlcat(audio_codec_str, ",", sizeof(audio_codec_str));
1301 av_strlcat(audio_codec_str, os->codec_str, sizeof(audio_codec_str));
1306 for (i = 0; i < s->nb_streams; i++) {
1307 char playlist_file[64];
1308 char codec_str[128];
1309 AVStream *st = s->streams[i];
1310 OutputStream *os = &c->streams[i];
1311 char *agroup = NULL;
1312 char *codec_str_ptr = NULL;
1313 int stream_bitrate = os->muxer_overhead;
1314 if (os->bit_rate > 0)
1315 stream_bitrate += os->bit_rate;
1317 stream_bitrate += os->pos * 8 * AV_TIME_BASE / c->total_duration;
1318 else if (os->first_segment_bit_rate > 0)
1319 stream_bitrate += os->first_segment_bit_rate;
1320 if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1322 if (os->segment_type != SEGMENT_TYPE_MP4)
1324 av_strlcpy(codec_str, os->codec_str, sizeof(codec_str));
1325 if (max_audio_bitrate) {
1326 agroup = (char *)audio_group;
1327 stream_bitrate += max_audio_bitrate;
1328 av_strlcat(codec_str, ",", sizeof(codec_str));
1329 av_strlcat(codec_str, audio_codec_str, sizeof(codec_str));
1331 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC) {
1332 codec_str_ptr = codec_str;
1334 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1335 ff_hls_write_stream_info(st, c->m3u8_out, stream_bitrate,
1336 playlist_file, agroup,
1337 codec_str_ptr, NULL, NULL);
1339 dashenc_io_close(s, &c->m3u8_out, temp_filename);
1341 if ((ret = ff_rename(temp_filename, filename_hls, s)) < 0)
1343 c->master_playlist_created = 1;
1349 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
1351 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
1353 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
1357 static int dash_init(AVFormatContext *s)
1359 DASHContext *c = s->priv_data;
1362 char basename[1024];
1364 c->nr_of_streams_to_flush = 0;
1365 if (c->single_file_name)
1368 c->use_template = 0;
1371 av_log(s, AV_LOG_ERROR, "At least one profile must be enabled.\n");
1372 return AVERROR(EINVAL);
1374 if (c->lhls && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1375 av_log(s, AV_LOG_ERROR,
1376 "LHLS is experimental, Please set -strict experimental in order to enable it.\n");
1377 return AVERROR_EXPERIMENTAL;
1380 if (c->lhls && !c->streaming) {
1381 av_log(s, AV_LOG_WARNING, "LHLS option will be ignored as streaming is not enabled\n");
1385 if (c->lhls && !c->hls_playlist) {
1386 av_log(s, AV_LOG_WARNING, "LHLS option will be ignored as hls_playlist is not enabled\n");
1390 if (c->ldash && !c->streaming) {
1391 av_log(s, AV_LOG_WARNING, "LDash option will be ignored as streaming is not enabled\n");
1395 if (c->target_latency && !c->streaming) {
1396 av_log(s, AV_LOG_WARNING, "Target latency option will be ignored as streaming is not enabled\n");
1397 c->target_latency = 0;
1400 if (c->global_sidx && !c->single_file) {
1401 av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as single_file is not enabled\n");
1405 if (c->global_sidx && c->streaming) {
1406 av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as streaming is enabled\n");
1409 if (c->frag_type == FRAG_TYPE_NONE && c->streaming) {
1410 av_log(s, AV_LOG_VERBOSE, "Changing frag_type from none to every_frame as streaming is enabled\n");
1411 c->frag_type = FRAG_TYPE_EVERY_FRAME;
1414 if (c->write_prft < 0) {
1415 c->write_prft = c->ldash;
1417 av_log(s, AV_LOG_VERBOSE, "Enabling Producer Reference Time element for Low Latency mode\n");
1420 if (c->write_prft && !c->utc_timing_url) {
1421 av_log(s, AV_LOG_WARNING, "Producer Reference Time element option will be ignored as utc_timing_url is not set\n");
1425 if (c->write_prft && !c->streaming) {
1426 av_log(s, AV_LOG_WARNING, "Producer Reference Time element option will be ignored as streaming is not enabled\n");
1430 if (c->ldash && !c->write_prft) {
1431 av_log(s, AV_LOG_WARNING, "Low Latency mode enabled without Producer Reference Time element option! Resulting manifest may not be complaint\n");
1434 if (c->target_latency && !c->write_prft) {
1435 av_log(s, AV_LOG_WARNING, "Target latency option will be ignored as Producer Reference Time element will not be written\n");
1436 c->target_latency = 0;
1439 if (av_cmp_q(c->max_playback_rate, c->min_playback_rate) < 0) {
1440 av_log(s, AV_LOG_WARNING, "Minimum playback rate value is higer than the Maximum. Both will be ignored\n");
1441 c->min_playback_rate = c->max_playback_rate = (AVRational) {1, 1};
1444 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
1445 ptr = strrchr(c->dirname, '/');
1447 av_strlcpy(basename, &ptr[1], sizeof(basename));
1450 c->dirname[0] = '\0';
1451 av_strlcpy(basename, s->url, sizeof(basename));
1454 ptr = strrchr(basename, '.');
1458 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
1460 return AVERROR(ENOMEM);
1462 if ((ret = parse_adaptation_sets(s)) < 0)
1465 if ((ret = init_segment_types(s)) < 0)
1468 for (i = 0; i < s->nb_streams; i++) {
1469 OutputStream *os = &c->streams[i];
1470 AdaptationSet *as = &c->as[os->as_idx - 1];
1471 AVFormatContext *ctx;
1473 AVDictionary *opts = NULL;
1474 char filename[1024];
1476 os->bit_rate = s->streams[i]->codecpar->bit_rate;
1477 if (!os->bit_rate) {
1478 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
1479 AV_LOG_ERROR : AV_LOG_WARNING;
1480 av_log(s, level, "No bit rate set for stream %d\n", i);
1481 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
1482 return AVERROR(EINVAL);
1485 // copy AdaptationSet language and role from stream metadata
1486 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
1487 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
1489 if (c->init_seg_name) {
1490 os->init_seg_name = av_strireplace(c->init_seg_name, "$ext$", os->extension_name);
1491 if (!os->init_seg_name)
1492 return AVERROR(ENOMEM);
1494 if (c->media_seg_name) {
1495 os->media_seg_name = av_strireplace(c->media_seg_name, "$ext$", os->extension_name);
1496 if (!os->media_seg_name)
1497 return AVERROR(ENOMEM);
1499 if (c->single_file_name) {
1500 os->single_file_name = av_strireplace(c->single_file_name, "$ext$", os->extension_name);
1501 if (!os->single_file_name)
1502 return AVERROR(ENOMEM);
1505 if (os->segment_type == SEGMENT_TYPE_WEBM) {
1506 if ((!c->single_file && check_file_extension(os->init_seg_name, os->format_name) != 0) ||
1507 (!c->single_file && check_file_extension(os->media_seg_name, os->format_name) != 0) ||
1508 (c->single_file && check_file_extension(os->single_file_name, os->format_name) != 0)) {
1509 av_log(s, AV_LOG_WARNING,
1510 "One or many segment file names doesn't end with .webm. "
1511 "Override -init_seg_name and/or -media_seg_name and/or "
1512 "-single_file_name to end with the extension .webm\n");
1515 // Streaming not supported as matroskaenc buffers internally before writing the output
1516 av_log(s, AV_LOG_WARNING, "One or more streams in WebM output format. Streaming option will be ignored\n");
1521 os->ctx = ctx = avformat_alloc_context();
1523 return AVERROR(ENOMEM);
1525 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
1527 return AVERROR_MUXER_NOT_FOUND;
1528 ctx->interrupt_callback = s->interrupt_callback;
1529 ctx->opaque = s->opaque;
1530 ctx->io_close = s->io_close;
1531 ctx->io_open = s->io_open;
1532 ctx->strict_std_compliance = s->strict_std_compliance;
1534 if (!(st = avformat_new_stream(ctx, NULL)))
1535 return AVERROR(ENOMEM);
1536 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
1537 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
1538 st->time_base = s->streams[i]->time_base;
1539 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
1540 ctx->avoid_negative_ts = s->avoid_negative_ts;
1541 ctx->flags = s->flags;
1543 os->parser = av_parser_init(st->codecpar->codec_id);
1545 os->parser_avctx = avcodec_alloc_context3(NULL);
1546 if (!os->parser_avctx)
1547 return AVERROR(ENOMEM);
1548 ret = avcodec_parameters_to_context(os->parser_avctx, st->codecpar);
1551 // We only want to parse frame headers
1552 os->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1555 if (c->single_file) {
1556 if (os->single_file_name)
1557 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->single_file_name, i, 0, os->bit_rate, 0);
1559 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.%s", basename, i, os->format_name);
1561 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->init_seg_name, i, 0, os->bit_rate, 0);
1563 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1564 set_http_options(&opts, c);
1565 if (!c->single_file) {
1566 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
1568 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
1570 ctx->url = av_strdup(filename);
1571 ret = avio_open2(&ctx->pb, filename, AVIO_FLAG_WRITE, NULL, &opts);
1573 av_dict_free(&opts);
1576 os->init_start_pos = 0;
1578 av_dict_copy(&opts, c->format_options, 0);
1579 if (!as->seg_duration)
1580 as->seg_duration = c->seg_duration;
1581 if (!as->frag_duration)
1582 as->frag_duration = c->frag_duration;
1583 if (as->frag_type < 0)
1584 as->frag_type = c->frag_type;
1585 os->seg_duration = as->seg_duration;
1586 os->frag_duration = as->frag_duration;
1587 os->frag_type = as->frag_type;
1589 c->max_segment_duration = FFMAX(c->max_segment_duration, as->seg_duration);
1591 if (c->profile & MPD_PROFILE_DVB && (os->seg_duration > 15000000 || os->seg_duration < 960000)) {
1592 av_log(s, AV_LOG_ERROR, "Segment duration %"PRId64" is outside the allowed range for DVB-DASH profile\n", os->seg_duration);
1593 return AVERROR(EINVAL);
1596 if (os->frag_type == FRAG_TYPE_DURATION && !os->frag_duration) {
1597 av_log(s, AV_LOG_WARNING, "frag_type set to duration for stream %d but no frag_duration set\n", i);
1598 os->frag_type = c->streaming ? FRAG_TYPE_EVERY_FRAME : FRAG_TYPE_NONE;
1600 if (os->frag_type == FRAG_TYPE_DURATION && os->frag_duration > os->seg_duration) {
1601 av_log(s, AV_LOG_ERROR, "Fragment duration %"PRId64" is longer than Segment duration %"PRId64"\n", os->frag_duration, os->seg_duration);
1602 return AVERROR(EINVAL);
1604 if (os->frag_type == FRAG_TYPE_PFRAMES && (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO || !os->parser)) {
1605 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && !os->parser)
1606 av_log(s, AV_LOG_WARNING, "frag_type set to P-Frame reordering, but no parser found for stream %d\n", i);
1607 os->frag_type = c->streaming ? FRAG_TYPE_EVERY_FRAME : FRAG_TYPE_NONE;
1609 if (os->frag_type != FRAG_TYPE_PFRAMES && as->trick_idx < 0)
1610 // Set this now if a parser isn't used
1611 os->coding_dependency = 1;
1613 if (os->segment_type == SEGMENT_TYPE_MP4) {
1615 // skip_sidx : Reduce bitrate overhead
1616 // skip_trailer : Avoids growing memory usage with time
1617 av_dict_set(&opts, "movflags", "+dash+delay_moov+skip_sidx+skip_trailer", AV_DICT_APPEND);
1620 av_dict_set(&opts, "movflags", "+dash+delay_moov+global_sidx+skip_trailer", AV_DICT_APPEND);
1622 av_dict_set(&opts, "movflags", "+dash+delay_moov+skip_trailer", AV_DICT_APPEND);
1624 if (os->frag_type == FRAG_TYPE_EVERY_FRAME)
1625 av_dict_set(&opts, "movflags", "+frag_every_frame", AV_DICT_APPEND);
1627 av_dict_set(&opts, "movflags", "+frag_custom", AV_DICT_APPEND);
1628 if (os->frag_type == FRAG_TYPE_DURATION)
1629 av_dict_set_int(&opts, "frag_duration", os->frag_duration, 0);
1631 av_dict_set(&opts, "write_prft", "wallclock", 0);
1633 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
1634 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
1635 av_dict_set_int(&opts, "dash", 1, 0);
1636 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
1637 av_dict_set_int(&opts, "live", 1, 0);
1639 ret = avformat_init_output(ctx, &opts);
1640 av_dict_free(&opts);
1644 avio_flush(ctx->pb);
1646 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1648 s->streams[i]->time_base = st->time_base;
1649 // If the muxer wants to shift timestamps, request to have them shifted
1650 // already before being handed to this muxer, so we don't have mismatches
1651 // between the MPD and the actual segments.
1652 s->avoid_negative_ts = ctx->avoid_negative_ts;
1653 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1654 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1656 if (avg_frame_rate.num > 0) {
1657 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1658 as->min_frame_rate = avg_frame_rate;
1659 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1660 as->max_frame_rate = avg_frame_rate;
1662 as->ambiguous_frame_rate = 1;
1665 if (st->codecpar->width > as->max_width)
1666 as->max_width = st->codecpar->width;
1667 if (st->codecpar->height > as->max_height)
1668 as->max_height = st->codecpar->height;
1670 if (st->sample_aspect_ratio.num)
1671 os->sar = st->sample_aspect_ratio;
1673 os->sar = (AVRational){1,1};
1674 av_reduce(&par.num, &par.den,
1675 st->codecpar->width * (int64_t)os->sar.num,
1676 st->codecpar->height * (int64_t)os->sar.den,
1679 if (as->par.num && av_cmp_q(par, as->par)) {
1680 av_log(s, AV_LOG_ERROR, "Conflicting stream aspect ratios values in Adaptation Set %d. Please ensure all adaptation sets have the same aspect ratio\n", os->as_idx);
1681 return AVERROR(EINVAL);
1688 set_codec_str(s, st->codecpar, &st->avg_frame_rate, os->codec_str,
1689 sizeof(os->codec_str));
1690 os->first_pts = AV_NOPTS_VALUE;
1691 os->max_pts = AV_NOPTS_VALUE;
1692 os->last_dts = AV_NOPTS_VALUE;
1693 os->segment_index = 1;
1695 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1696 c->nr_of_streams_to_flush++;
1699 if (!c->has_video && c->seg_duration <= 0) {
1700 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1701 return AVERROR(EINVAL);
1703 if (!c->has_video && c->frag_type == FRAG_TYPE_PFRAMES)
1704 av_log(s, AV_LOG_WARNING, "no video stream and P-frame fragmentation set\n");
1706 c->nr_of_streams_flushed = 0;
1707 c->target_latency_refid = -1;
1712 static int dash_write_header(AVFormatContext *s)
1714 DASHContext *c = s->priv_data;
1716 for (i = 0; i < s->nb_streams; i++) {
1717 OutputStream *os = &c->streams[i];
1718 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1721 // Flush init segment
1722 // Only for WebM segment, since for mp4 delay_moov is set and
1723 // the init segment is thus flushed after the first packets.
1724 if (os->segment_type == SEGMENT_TYPE_WEBM &&
1725 (ret = flush_init_segment(s, os)) < 0)
1731 static int add_segment(OutputStream *os, const char *file,
1732 int64_t time, int64_t duration,
1733 int64_t start_pos, int64_t range_length,
1734 int64_t index_length, int next_exp_index)
1738 if (os->nb_segments >= os->segments_size) {
1739 os->segments_size = (os->segments_size + 1) * 2;
1740 if ((err = av_reallocp_array(&os->segments, sizeof(*os->segments),
1741 os->segments_size)) < 0) {
1742 os->segments_size = 0;
1743 os->nb_segments = 0;
1747 seg = av_mallocz(sizeof(*seg));
1749 return AVERROR(ENOMEM);
1750 av_strlcpy(seg->file, file, sizeof(seg->file));
1752 seg->duration = duration;
1753 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1754 seg->duration += seg->time;
1757 seg->start_pos = start_pos;
1758 seg->range_length = range_length;
1759 seg->index_length = index_length;
1760 os->segments[os->nb_segments++] = seg;
1761 os->segment_index++;
1762 //correcting the segment index if it has fallen behind the expected value
1763 if (os->segment_index < next_exp_index) {
1764 av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n",
1765 file, os->segment_index, next_exp_index);
1766 os->segment_index = next_exp_index;
1771 static void write_styp(AVIOContext *pb)
1774 ffio_wfourcc(pb, "styp");
1775 ffio_wfourcc(pb, "msdh");
1776 avio_wb32(pb, 0); /* minor */
1777 ffio_wfourcc(pb, "msdh");
1778 ffio_wfourcc(pb, "msix");
1781 static void find_index_range(AVFormatContext *s, const char *full_path,
1782 int64_t pos, int *index_length)
1788 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1791 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1792 ff_format_io_close(s, &pb);
1795 ret = avio_read(pb, buf, 8);
1796 ff_format_io_close(s, &pb);
1799 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1801 *index_length = AV_RB32(&buf[0]);
1804 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1805 AVPacket *pkt, AVRational *frame_rate)
1807 AVCodecParameters *par = os->ctx->streams[0]->codecpar;
1809 size_t extradata_size;
1812 if (par->extradata_size)
1815 extradata = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &extradata_size);
1816 if (!extradata_size)
1819 ret = ff_alloc_extradata(par, extradata_size);
1823 memcpy(par->extradata, extradata, extradata_size);
1825 set_codec_str(s, par, frame_rate, os->codec_str, sizeof(os->codec_str));
1830 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1831 DASHContext *c = s->priv_data;
1832 int http_base_proto = ff_is_http_proto(filename);
1834 if (http_base_proto) {
1835 AVIOContext *out = NULL;
1836 AVDictionary *http_opts = NULL;
1838 set_http_options(&http_opts, c);
1839 av_dict_set(&http_opts, "method", "DELETE", 0);
1841 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1842 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1845 av_dict_free(&http_opts);
1846 ff_format_io_close(s, &out);
1848 int res = avpriv_io_delete(filename);
1850 char errbuf[AV_ERROR_MAX_STRING_SIZE];
1851 av_strerror(res, errbuf, sizeof(errbuf));
1852 av_log(s, (res == AVERROR(ENOENT) ? AV_LOG_WARNING : AV_LOG_ERROR), "failed to delete %s: %s\n", filename, errbuf);
1857 static int dashenc_delete_segment_file(AVFormatContext *s, const char* file)
1859 DASHContext *c = s->priv_data;
1862 av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
1864 av_bprintf(&buf, "%s%s", c->dirname, file);
1865 if (!av_bprint_is_complete(&buf)) {
1866 av_bprint_finalize(&buf, NULL);
1867 av_log(s, AV_LOG_WARNING, "Out of memory for filename\n");
1868 return AVERROR(ENOMEM);
1871 dashenc_delete_file(s, buf.str);
1873 av_bprint_finalize(&buf, NULL);
1877 static inline void dashenc_delete_media_segments(AVFormatContext *s, OutputStream *os, int remove_count)
1879 for (int i = 0; i < remove_count; ++i) {
1880 dashenc_delete_segment_file(s, os->segments[i]->file);
1882 // Delete the segment regardless of whether the file was successfully deleted
1883 av_free(os->segments[i]);
1886 os->nb_segments -= remove_count;
1887 memmove(os->segments, os->segments + remove_count, os->nb_segments * sizeof(*os->segments));
1890 static int dash_flush(AVFormatContext *s, int final, int stream)
1892 DASHContext *c = s->priv_data;
1895 const char *proto = avio_find_protocol_name(s->url);
1896 int use_rename = proto && !strcmp(proto, "file");
1898 int cur_flush_segment_index = 0, next_exp_index = -1;
1900 cur_flush_segment_index = c->streams[stream].segment_index;
1902 //finding the next segment's expected index, based on the current pts value
1903 if (c->use_template && !c->use_timeline && c->index_correction &&
1904 c->streams[stream].last_pts != AV_NOPTS_VALUE &&
1905 c->streams[stream].first_pts != AV_NOPTS_VALUE) {
1906 int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts -
1907 c->streams[stream].first_pts,
1908 s->streams[stream]->time_base,
1910 next_exp_index = (pts_diff / c->streams[stream].seg_duration) + 1;
1914 for (i = 0; i < s->nb_streams; i++) {
1915 OutputStream *os = &c->streams[i];
1916 AVStream *st = s->streams[i];
1917 int range_length, index_length = 0;
1920 if (!os->packets_written)
1923 // Flush the single stream that got a keyframe right now.
1924 // Flush all audio streams as well, in sync with video keyframes,
1925 // but not the other video streams.
1926 if (stream >= 0 && i != stream) {
1927 if (s->streams[stream]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO &&
1928 s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1930 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1932 // Make sure we don't flush audio streams multiple times, when
1933 // all video streams are flushed one at a time.
1934 if (c->has_video && os->segment_index > cur_flush_segment_index)
1939 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1941 ret = flush_dynbuf(c, os, &range_length);
1944 os->packets_written = 0;
1946 if (c->single_file) {
1947 find_index_range(s, os->full_path, os->pos, &index_length);
1949 dashenc_io_close(s, &os->out, os->temp_path);
1952 ret = ff_rename(os->temp_path, os->full_path, os->ctx);
1958 duration = av_rescale_q(os->max_pts - os->start_pts, st->time_base, AV_TIME_BASE_Q);
1959 os->last_duration = FFMAX(os->last_duration, duration);
1961 if (!os->muxer_overhead && os->max_pts > os->start_pts)
1962 os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1963 8 * AV_TIME_BASE) / duration;
1964 os->total_pkt_size = 0;
1965 os->total_pkt_duration = 0;
1967 if (!os->bit_rate && !os->first_segment_bit_rate) {
1968 os->first_segment_bit_rate = (int64_t) range_length * 8 * AV_TIME_BASE / duration;
1970 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index);
1971 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1973 os->pos += range_length;
1976 if (c->window_size) {
1977 for (i = 0; i < s->nb_streams; i++) {
1978 OutputStream *os = &c->streams[i];
1979 int remove_count = os->nb_segments - c->window_size - c->extra_window_size;
1980 if (remove_count > 0)
1981 dashenc_delete_media_segments(s, os, remove_count);
1986 for (i = 0; i < s->nb_streams; i++) {
1987 OutputStream *os = &c->streams[i];
1988 if (os->ctx && os->ctx_inited) {
1989 int64_t file_size = avio_tell(os->ctx->pb);
1990 av_write_trailer(os->ctx);
1991 if (c->global_sidx) {
1992 int j, start_index, start_number;
1993 int64_t sidx_size = avio_tell(os->ctx->pb) - file_size;
1994 get_start_index_number(os, c, &start_index, &start_number);
1995 if (start_index >= os->nb_segments ||
1996 os->segment_type != SEGMENT_TYPE_MP4)
1998 os->init_range_length += sidx_size;
1999 for (j = start_index; j < os->nb_segments; j++) {
2000 Segment *seg = os->segments[j];
2001 seg->start_pos += sidx_size;
2009 if (c->has_video && !final) {
2010 c->nr_of_streams_flushed++;
2011 if (c->nr_of_streams_flushed != c->nr_of_streams_to_flush)
2014 c->nr_of_streams_flushed = 0;
2016 ret = write_manifest(s, final);
2021 static int dash_parse_prft(DASHContext *c, AVPacket *pkt)
2023 OutputStream *os = &c->streams[pkt->stream_index];
2024 AVProducerReferenceTime *prft;
2025 size_t side_data_size;
2027 prft = (AVProducerReferenceTime *)av_packet_get_side_data(pkt, AV_PKT_DATA_PRFT, &side_data_size);
2028 if (!prft || side_data_size != sizeof(AVProducerReferenceTime) || (prft->flags && prft->flags != 24)) {
2029 // No encoder generated or user provided capture time AVProducerReferenceTime side data. Instead
2030 // of letting the mov muxer generate one, do it here so we can also use it for the manifest.
2031 prft = (AVProducerReferenceTime *)av_packet_new_side_data(pkt, AV_PKT_DATA_PRFT,
2032 sizeof(AVProducerReferenceTime));
2034 return AVERROR(ENOMEM);
2035 prft->wallclock = av_gettime();
2038 if (os->first_pts == AV_NOPTS_VALUE) {
2039 os->producer_reference_time = *prft;
2040 if (c->target_latency_refid < 0)
2041 c->target_latency_refid = pkt->stream_index;
2047 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
2049 DASHContext *c = s->priv_data;
2050 AVStream *st = s->streams[pkt->stream_index];
2051 OutputStream *os = &c->streams[pkt->stream_index];
2052 AdaptationSet *as = &c->as[os->as_idx - 1];
2053 int64_t seg_end_duration, elapsed_duration;
2056 ret = update_stream_extradata(s, os, pkt, &st->avg_frame_rate);
2060 // Fill in a heuristic guess of the packet duration, if none is available.
2061 // The mp4 muxer will do something similar (for the last packet in a fragment)
2062 // if nothing is set (setting it for the other packets doesn't hurt).
2063 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
2064 // invoke its heuristic (this doesn't have to be identical to that algorithm),
2065 // so that we know the exact timestamps of fragments.
2066 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
2067 pkt->duration = pkt->dts - os->last_dts;
2068 os->last_dts = pkt->dts;
2070 // If forcing the stream to start at 0, the mp4 muxer will set the start
2071 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
2072 if (os->first_pts == AV_NOPTS_VALUE &&
2073 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
2074 pkt->pts -= pkt->dts;
2078 if (c->write_prft) {
2079 ret = dash_parse_prft(c, pkt);
2084 if (os->first_pts == AV_NOPTS_VALUE) {
2085 os->first_pts = pkt->pts;
2087 os->last_pts = pkt->pts;
2089 if (!c->availability_start_time[0]) {
2090 int64_t start_time_us = av_gettime();
2091 c->start_time_s = start_time_us / 1000000;
2092 format_date(c->availability_start_time,
2093 sizeof(c->availability_start_time), start_time_us);
2096 if (!os->packets_written)
2097 os->availability_time_offset = 0;
2099 if (!os->availability_time_offset &&
2100 ((os->frag_type == FRAG_TYPE_DURATION && os->seg_duration != os->frag_duration) ||
2101 (os->frag_type == FRAG_TYPE_EVERY_FRAME && pkt->duration))) {
2102 AdaptationSet *as = &c->as[os->as_idx - 1];
2103 int64_t frame_duration = 0;
2105 switch (os->frag_type) {
2106 case FRAG_TYPE_DURATION:
2107 frame_duration = os->frag_duration;
2109 case FRAG_TYPE_EVERY_FRAME:
2110 frame_duration = av_rescale_q(pkt->duration, st->time_base, AV_TIME_BASE_Q);
2114 os->availability_time_offset = ((double) os->seg_duration -
2115 frame_duration) / AV_TIME_BASE;
2116 as->max_frag_duration = FFMAX(frame_duration, as->max_frag_duration);
2119 if (c->use_template && !c->use_timeline) {
2120 elapsed_duration = pkt->pts - os->first_pts;
2121 seg_end_duration = (int64_t) os->segment_index * os->seg_duration;
2123 elapsed_duration = pkt->pts - os->start_pts;
2124 seg_end_duration = os->seg_duration;
2128 (os->frag_type == FRAG_TYPE_PFRAMES ||
2129 as->trick_idx >= 0)) {
2130 // Parse the packets only in scenarios where it's needed
2133 av_parser_parse2(os->parser, os->parser_avctx,
2134 &data, &size, pkt->data, pkt->size,
2135 pkt->pts, pkt->dts, pkt->pos);
2137 os->coding_dependency |= os->parser->pict_type != AV_PICTURE_TYPE_I;
2140 if (pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
2141 av_compare_ts(elapsed_duration, st->time_base,
2142 seg_end_duration, AV_TIME_BASE_Q) >= 0) {
2143 if (!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
2144 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
2147 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
2151 if ((!c->use_timeline || !c->use_template) && os->last_duration) {
2152 if (c->last_duration < os->last_duration*9/10 ||
2153 c->last_duration > os->last_duration*11/10) {
2154 av_log(s, AV_LOG_WARNING,
2155 "Segment durations differ too much, enable use_timeline "
2156 "and use_template, or keep a stricter keyframe interval\n");
2161 if (c->write_prft && os->producer_reference_time.wallclock && !os->producer_reference_time_str[0])
2162 format_date(os->producer_reference_time_str,
2163 sizeof(os->producer_reference_time_str),
2164 os->producer_reference_time.wallclock);
2166 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
2170 if (!os->packets_written) {
2171 // If we wrote a previous segment, adjust the start time of the segment
2172 // to the end of the previous one (which is the same as the mp4 muxer
2173 // does). This avoids gaps in the timeline.
2174 if (os->max_pts != AV_NOPTS_VALUE)
2175 os->start_pts = os->max_pts;
2177 os->start_pts = pkt->pts;
2179 if (os->max_pts == AV_NOPTS_VALUE)
2180 os->max_pts = pkt->pts + pkt->duration;
2182 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
2184 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
2185 os->frag_type == FRAG_TYPE_PFRAMES &&
2186 os->packets_written) {
2187 av_assert0(os->parser);
2188 if ((os->parser->pict_type == AV_PICTURE_TYPE_P &&
2189 st->codecpar->video_delay &&
2190 !(os->last_flags & AV_PKT_FLAG_KEY)) ||
2191 pkt->flags & AV_PKT_FLAG_KEY) {
2192 ret = av_write_frame(os->ctx, NULL);
2196 if (!os->availability_time_offset) {
2197 int64_t frag_duration = av_rescale_q(os->total_pkt_duration, st->time_base,
2199 os->availability_time_offset = ((double) os->seg_duration -
2200 frag_duration) / AV_TIME_BASE;
2201 as->max_frag_duration = FFMAX(frag_duration, as->max_frag_duration);
2206 if (pkt->flags & AV_PKT_FLAG_KEY && (os->packets_written || os->nb_segments) && !os->gop_size && as->trick_idx < 0) {
2207 os->gop_size = os->last_duration + av_rescale_q(os->total_pkt_duration, st->time_base, AV_TIME_BASE_Q);
2208 c->max_gop_size = FFMAX(c->max_gop_size, os->gop_size);
2211 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
2214 os->packets_written++;
2215 os->total_pkt_size += pkt->size;
2216 os->total_pkt_duration += pkt->duration;
2217 os->last_flags = pkt->flags;
2219 if (!os->init_range_length)
2220 flush_init_segment(s, os);
2222 //open the output context when the first frame of a segment is ready
2223 if (!c->single_file && os->packets_written == 1) {
2224 AVDictionary *opts = NULL;
2225 const char *proto = avio_find_protocol_name(s->url);
2226 int use_rename = proto && !strcmp(proto, "file");
2227 if (os->segment_type == SEGMENT_TYPE_MP4)
2228 write_styp(os->ctx->pb);
2229 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
2230 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
2231 os->media_seg_name, pkt->stream_index,
2232 os->segment_index, os->bit_rate, os->start_pts);
2233 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
2235 snprintf(os->temp_path, sizeof(os->temp_path),
2236 use_rename ? "%s.tmp" : "%s", os->full_path);
2237 set_http_options(&opts, c);
2238 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
2239 av_dict_free(&opts);
2241 return handle_io_open_error(s, ret, os->temp_path);
2244 char *prefetch_url = use_rename ? NULL : os->filename;
2245 write_hls_media_playlist(os, s, pkt->stream_index, 0, prefetch_url);
2249 //write out the data immediately in streaming mode
2250 if (c->streaming && os->segment_type == SEGMENT_TYPE_MP4) {
2252 uint8_t *buf = NULL;
2253 avio_flush(os->ctx->pb);
2254 len = avio_get_dyn_buf (os->ctx->pb, &buf);
2256 avio_write(os->out, buf + os->written_len, len - os->written_len);
2257 avio_flush(os->out);
2259 os->written_len = len;
2265 static int dash_write_trailer(AVFormatContext *s)
2267 DASHContext *c = s->priv_data;
2270 if (s->nb_streams > 0) {
2271 OutputStream *os = &c->streams[0];
2272 // If no segments have been written so far, try to do a crude
2273 // guess of the segment duration
2274 if (!c->last_duration)
2275 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
2276 s->streams[0]->time_base,
2278 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
2279 s->streams[0]->time_base,
2282 dash_flush(s, 1, -1);
2284 if (c->remove_at_exit) {
2285 for (i = 0; i < s->nb_streams; ++i) {
2286 OutputStream *os = &c->streams[i];
2287 dashenc_delete_media_segments(s, os, os->nb_segments);
2288 dashenc_delete_segment_file(s, os->initfile);
2289 if (c->hls_playlist && os->segment_type == SEGMENT_TYPE_MP4) {
2290 char filename[1024];
2291 get_hls_playlist_name(filename, sizeof(filename), c->dirname, i);
2292 dashenc_delete_file(s, filename);
2295 dashenc_delete_file(s, s->url);
2297 if (c->hls_playlist && c->master_playlist_created) {
2298 char filename[1024];
2299 snprintf(filename, sizeof(filename), "%s%s", c->dirname, c->hls_master_name);
2300 dashenc_delete_file(s, filename);
2307 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
2309 DASHContext *c = s->priv_data;
2310 OutputStream *os = &c->streams[avpkt->stream_index];
2311 AVFormatContext *oc = os->ctx;
2312 if (oc->oformat->check_bitstream) {
2314 AVPacket pkt = *avpkt;
2315 pkt.stream_index = 0;
2316 ret = oc->oformat->check_bitstream(oc, &pkt);
2318 AVStream *st = s->streams[avpkt->stream_index];
2319 AVStream *ost = oc->streams[0];
2320 st->internal->bsfc = ost->internal->bsfc;
2321 ost->internal->bsfc = NULL;
2328 #define OFFSET(x) offsetof(DASHContext, x)
2329 #define E AV_OPT_FLAG_ENCODING_PARAM
2330 static const AVOption options[] = {
2331 { "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 },
2332 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
2333 { "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 },
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 },
2375 { "update_period", "Set the mpd update interval", OFFSET(update_period), AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
2379 static const AVClass dash_class = {
2380 .class_name = "dash muxer",
2381 .item_name = av_default_item_name,
2383 .version = LIBAVUTIL_VERSION_INT,
2386 AVOutputFormat ff_dash_muxer = {
2388 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
2389 .extensions = "mpd",
2390 .priv_data_size = sizeof(DASHContext),
2391 .audio_codec = AV_CODEC_ID_AAC,
2392 .video_codec = AV_CODEC_ID_H264,
2393 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
2395 .write_header = dash_write_header,
2396 .write_packet = dash_write_packet,
2397 .write_trailer = dash_write_trailer,
2398 .deinit = dash_free,
2399 .check_bitstream = dash_check_bitstream,
2400 .priv_class = &dash_class,