3 * Copyright (c) 2007 David Conrad
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 #include "avio_internal.h"
28 #include "avlanguage.h"
34 #include "subtitles.h"
35 #include "vorbiscomment.h"
38 #include "libavutil/avstring.h"
39 #include "libavutil/channel_layout.h"
40 #include "libavutil/dict.h"
41 #include "libavutil/intfloat.h"
42 #include "libavutil/intreadwrite.h"
43 #include "libavutil/lfg.h"
44 #include "libavutil/mastering_display_metadata.h"
45 #include "libavutil/mathematics.h"
46 #include "libavutil/opt.h"
47 #include "libavutil/random_seed.h"
48 #include "libavutil/rational.h"
49 #include "libavutil/samplefmt.h"
50 #include "libavutil/sha.h"
51 #include "libavutil/stereo3d.h"
53 #include "libavcodec/xiph.h"
54 #include "libavcodec/mpeg4audio.h"
55 #include "libavcodec/internal.h"
57 typedef struct ebml_master {
58 int64_t pos; ///< absolute offset in the file where the master's elements start
59 int sizebytes; ///< how many bytes were reserved for the size
62 typedef struct mkv_seekhead_entry {
63 unsigned int elementid;
67 typedef struct mkv_seekhead {
69 int64_t segment_offset; ///< the file offset to the beginning of the segment
70 int reserved_size; ///< -1 if appending to file
72 mkv_seekhead_entry *entries;
76 typedef struct mkv_cuepoint {
80 int64_t cluster_pos; ///< file offset of the cluster containing the block
81 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
82 int64_t duration; ///< duration of the block according to time base
85 typedef struct mkv_cues {
86 int64_t segment_offset;
87 mkv_cuepoint *entries;
91 typedef struct mkv_track {
97 #define MODE_MATROSKAv2 0x01
98 #define MODE_WEBM 0x02
100 /** Maximum number of tracks allowed in a Matroska file (with track numbers in
101 * range 1 to 126 (inclusive) */
102 #define MAX_TRACKS 126
104 typedef struct MatroskaMuxContext {
105 const AVClass *class;
109 int64_t segment_offset;
111 int64_t cluster_pos; ///< file offset of the current cluster
113 int64_t duration_offset;
115 mkv_seekhead *main_seekhead;
119 AVPacket cur_audio_pkt;
121 int have_attachments;
123 int reserve_cues_space;
124 int cluster_size_limit;
126 int64_t cluster_time_limit;
128 int dash_track_number;
131 uint32_t chapter_id_offset;
134 int64_t last_track_timestamp[MAX_TRACKS];
136 int64_t* stream_durations;
137 int64_t* stream_duration_offsets;
140 } MatroskaMuxContext;
143 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
144 * offset, 4 bytes for target EBML ID */
145 #define MAX_SEEKENTRY_SIZE 21
147 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 4
149 #define MAX_CUETRACKPOS_SIZE 42
151 /** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */
152 #define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE * num_tracks
154 /** Seek preroll value for opus */
155 #define OPUS_SEEK_PREROLL 80000000
157 static int ebml_id_size(unsigned int id)
159 return (av_log2(id + 1) - 1) / 7 + 1;
162 static void put_ebml_id(AVIOContext *pb, unsigned int id)
164 int i = ebml_id_size(id);
166 avio_w8(pb, (uint8_t)(id >> (i * 8)));
170 * Write an EBML size meaning "unknown size".
172 * @param bytes The number of bytes the size should occupy (maximum: 8).
174 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
176 av_assert0(bytes <= 8);
177 avio_w8(pb, 0x1ff >> bytes);
178 ffio_fill(pb, 0xff, bytes - 1);
182 * Calculate how many bytes are needed to represent a given number in EBML.
184 static int ebml_num_size(uint64_t num)
187 while ((num + 1) >> bytes * 7)
193 * Write a number in EBML variable length format.
195 * @param bytes The number of bytes that need to be used to write the number.
196 * If zero, any number of bytes can be used.
198 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
200 int i, needed_bytes = ebml_num_size(num);
202 // sizes larger than this are currently undefined in EBML
203 av_assert0(num < (1ULL << 56) - 1);
206 // don't care how many bytes are used, so use the min
207 bytes = needed_bytes;
208 // the bytes needed to write the given size would exceed the bytes
209 // that we need to use, so write unknown size. This shouldn't happen.
210 av_assert0(bytes >= needed_bytes);
212 num |= 1ULL << bytes * 7;
213 for (i = bytes - 1; i >= 0; i--)
214 avio_w8(pb, (uint8_t)(num >> i * 8));
217 static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val)
224 put_ebml_id(pb, elementid);
225 put_ebml_num(pb, bytes, 0);
226 for (i = bytes - 1; i >= 0; i--)
227 avio_w8(pb, (uint8_t)(val >> i * 8));
230 static void put_ebml_sint(AVIOContext *pb, unsigned int elementid, int64_t val)
233 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
235 while (tmp>>=8) bytes++;
237 put_ebml_id(pb, elementid);
238 put_ebml_num(pb, bytes, 0);
239 for (i = bytes - 1; i >= 0; i--)
240 avio_w8(pb, (uint8_t)(val >> i * 8));
243 static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val)
245 put_ebml_id(pb, elementid);
246 put_ebml_num(pb, 8, 0);
247 avio_wb64(pb, av_double2int(val));
250 static void put_ebml_binary(AVIOContext *pb, unsigned int elementid,
251 const void *buf, int size)
253 put_ebml_id(pb, elementid);
254 put_ebml_num(pb, size, 0);
255 avio_write(pb, buf, size);
258 static void put_ebml_string(AVIOContext *pb, unsigned int elementid,
261 put_ebml_binary(pb, elementid, str, strlen(str));
265 * Write a void element of a given size. Useful for reserving space in
266 * the file to be written to later.
268 * @param size The number of bytes to reserve, which must be at least 2.
270 static void put_ebml_void(AVIOContext *pb, uint64_t size)
272 int64_t currentpos = avio_tell(pb);
274 av_assert0(size >= 2);
276 put_ebml_id(pb, EBML_ID_VOID);
277 // we need to subtract the length needed to store the size from the
278 // size we need to reserve so 2 cases, we use 8 bytes to store the
279 // size if possible, 1 byte otherwise
281 put_ebml_num(pb, size - 1, 0);
283 put_ebml_num(pb, size - 9, 8);
284 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
287 static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid,
288 uint64_t expectedsize)
290 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
291 put_ebml_id(pb, elementid);
292 put_ebml_size_unknown(pb, bytes);
293 return (ebml_master) {avio_tell(pb), bytes };
296 static void end_ebml_master(AVIOContext *pb, ebml_master master)
298 int64_t pos = avio_tell(pb);
300 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
302 put_ebml_num(pb, pos - master.pos, master.sizebytes);
303 avio_seek(pb, pos, SEEK_SET);
306 static void put_xiph_size(AVIOContext *pb, int size)
308 ffio_fill(pb, 255, size / 255);
309 avio_w8(pb, size % 255);
313 * Free the members allocated in the mux context.
315 static void mkv_free(MatroskaMuxContext *mkv) {
316 if (mkv->main_seekhead) {
317 av_freep(&mkv->main_seekhead->entries);
318 av_freep(&mkv->main_seekhead);
321 av_freep(&mkv->cues->entries);
322 av_freep(&mkv->cues);
324 av_freep(&mkv->tracks);
325 av_freep(&mkv->stream_durations);
326 av_freep(&mkv->stream_duration_offsets);
330 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
331 * elements. If a maximum number of elements is specified, enough space
332 * will be reserved at the current file location to write a seek head of
335 * @param segment_offset The absolute offset to the position in the file
336 * where the segment begins.
337 * @param numelements The maximum number of elements that will be indexed
338 * by this seek head, 0 if unlimited.
340 static mkv_seekhead *mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset,
343 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
347 new_seekhead->segment_offset = segment_offset;
349 if (numelements > 0) {
350 new_seekhead->filepos = avio_tell(pb);
351 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
352 // and size, and 3 bytes to guarantee that an EBML void element
353 // will fit afterwards
354 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 13;
355 new_seekhead->max_entries = numelements;
356 put_ebml_void(pb, new_seekhead->reserved_size);
361 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
363 mkv_seekhead_entry *entries = seekhead->entries;
365 // don't store more elements than we reserved space for
366 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
369 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
371 return AVERROR(ENOMEM);
372 seekhead->entries = entries;
374 seekhead->entries[seekhead->num_entries].elementid = elementid;
375 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
381 * Write the seek head to the file and free it. If a maximum number of
382 * elements was specified to mkv_start_seekhead(), the seek head will
383 * be written at the location reserved for it. Otherwise, it is written
384 * at the current location in the file.
386 * @return The file offset where the seekhead was written,
387 * -1 if an error occurred.
389 static int64_t mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv)
391 mkv_seekhead *seekhead = mkv->main_seekhead;
392 ebml_master metaseek, seekentry;
396 currentpos = avio_tell(pb);
398 if (seekhead->reserved_size > 0) {
399 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
405 metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size);
406 for (i = 0; i < seekhead->num_entries; i++) {
407 mkv_seekhead_entry *entry = &seekhead->entries[i];
409 seekentry = start_ebml_master(pb, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
411 put_ebml_id(pb, MATROSKA_ID_SEEKID);
412 put_ebml_num(pb, ebml_id_size(entry->elementid), 0);
413 put_ebml_id(pb, entry->elementid);
415 put_ebml_uint(pb, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
416 end_ebml_master(pb, seekentry);
418 end_ebml_master(pb, metaseek);
420 if (seekhead->reserved_size > 0) {
421 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
422 put_ebml_void(pb, remaining);
423 avio_seek(pb, currentpos, SEEK_SET);
425 currentpos = seekhead->filepos;
428 av_freep(&mkv->main_seekhead->entries);
429 av_freep(&mkv->main_seekhead);
434 static mkv_cues *mkv_start_cues(int64_t segment_offset)
436 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
440 cues->segment_offset = segment_offset;
444 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
445 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
447 mkv_cuepoint *entries = cues->entries;
452 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
454 return AVERROR(ENOMEM);
455 cues->entries = entries;
457 cues->entries[cues->num_entries].pts = ts;
458 cues->entries[cues->num_entries].stream_idx = stream;
459 cues->entries[cues->num_entries].tracknum = tracknum;
460 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
461 cues->entries[cues->num_entries].relative_pos = relative_pos;
462 cues->entries[cues->num_entries++].duration = duration;
467 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
469 AVIOContext *pb = s->pb;
470 ebml_master cues_element;
474 currentpos = avio_tell(pb);
475 cues_element = start_ebml_master(pb, MATROSKA_ID_CUES, 0);
477 for (i = 0; i < cues->num_entries; i++) {
478 ebml_master cuepoint, track_positions;
479 mkv_cuepoint *entry = &cues->entries[i];
480 uint64_t pts = entry->pts;
483 // Calculate the number of entries, so we know the element size
484 for (j = 0; j < num_tracks; j++)
485 tracks[j].has_cue = 0;
486 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
487 int tracknum = entry[j].stream_idx;
488 av_assert0(tracknum>=0 && tracknum<num_tracks);
489 if (tracks[tracknum].has_cue && s->streams[tracknum]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
491 tracks[tracknum].has_cue = 1;
495 cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(ctp_nb));
496 put_ebml_uint(pb, MATROSKA_ID_CUETIME, pts);
498 // put all the entries from different tracks that have the exact same
499 // timestamp into the same CuePoint
500 for (j = 0; j < num_tracks; j++)
501 tracks[j].has_cue = 0;
502 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
503 int tracknum = entry[j].stream_idx;
504 av_assert0(tracknum>=0 && tracknum<num_tracks);
505 if (tracks[tracknum].has_cue && s->streams[tracknum]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
507 tracks[tracknum].has_cue = 1;
508 track_positions = start_ebml_master(pb, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
509 put_ebml_uint(pb, MATROSKA_ID_CUETRACK , entry[j].tracknum );
510 put_ebml_uint(pb, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
511 put_ebml_uint(pb, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
512 if (entry[j].duration != -1)
513 put_ebml_uint(pb, MATROSKA_ID_CUEDURATION , entry[j].duration);
514 end_ebml_master(pb, track_positions);
517 end_ebml_master(pb, cuepoint);
519 end_ebml_master(pb, cues_element);
524 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
526 const uint8_t *header_start[3];
528 int first_header_size;
531 if (par->codec_id == AV_CODEC_ID_VORBIS)
532 first_header_size = 30;
534 first_header_size = 42;
536 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
537 first_header_size, header_start, header_len) < 0) {
538 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
542 avio_w8(pb, 2); // number packets - 1
543 for (j = 0; j < 2; j++) {
544 put_xiph_size(pb, header_len[j]);
546 for (j = 0; j < 3; j++)
547 avio_write(pb, header_start[j], header_len[j]);
552 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
554 if (par->extradata && par->extradata_size == 2)
555 avio_write(pb, par->extradata, 2);
557 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
561 static int put_flac_codecpriv(AVFormatContext *s,
562 AVIOContext *pb, AVCodecParameters *par)
564 int write_comment = (par->channel_layout &&
565 !(par->channel_layout & ~0x3ffffULL) &&
566 !ff_flac_is_native_layout(par->channel_layout));
567 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
574 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
575 "Lavf" : LIBAVFORMAT_IDENT;
576 AVDictionary *dict = NULL;
577 uint8_t buf[32], *data, *p;
580 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
581 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
583 len = ff_vorbiscomment_length(dict, vendor);
584 if (len >= ((1<<24) - 4))
585 return AVERROR(EINVAL);
587 data = av_malloc(len + 4);
590 return AVERROR(ENOMEM);
594 AV_WB24(data + 1, len);
597 ff_vorbiscomment_write(&p, &dict, vendor);
599 avio_write(pb, data, len + 4);
608 static int get_aac_sample_rates(AVFormatContext *s, AVCodecParameters *par,
609 int *sample_rate, int *output_sample_rate)
611 MPEG4AudioConfig mp4ac;
613 if (avpriv_mpeg4audio_get_config(&mp4ac, par->extradata,
614 par->extradata_size * 8, 1) < 0) {
615 av_log(s, AV_LOG_ERROR,
616 "Error parsing AAC extradata, unable to determine samplerate.\n");
617 return AVERROR(EINVAL);
620 *sample_rate = mp4ac.sample_rate;
621 *output_sample_rate = mp4ac.ext_sample_rate;
625 static int mkv_write_native_codecprivate(AVFormatContext *s,
626 AVCodecParameters *par,
629 switch (par->codec_id) {
630 case AV_CODEC_ID_VORBIS:
631 case AV_CODEC_ID_THEORA:
632 return put_xiph_codecpriv(s, dyn_cp, par);
633 case AV_CODEC_ID_FLAC:
634 return put_flac_codecpriv(s, dyn_cp, par);
635 case AV_CODEC_ID_WAVPACK:
636 return put_wv_codecpriv(dyn_cp, par);
637 case AV_CODEC_ID_H264:
638 return ff_isom_write_avcc(dyn_cp, par->extradata,
639 par->extradata_size);
640 case AV_CODEC_ID_HEVC:
641 ff_isom_write_hvcc(dyn_cp, par->extradata,
642 par->extradata_size, 0);
644 case AV_CODEC_ID_ALAC:
645 if (par->extradata_size < 36) {
646 av_log(s, AV_LOG_ERROR,
647 "Invalid extradata found, ALAC expects a 36-byte "
649 return AVERROR_INVALIDDATA;
651 avio_write(dyn_cp, par->extradata + 12,
652 par->extradata_size - 12);
655 if (par->codec_id == AV_CODEC_ID_PRORES &&
656 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
657 avio_wl32(dyn_cp, par->codec_tag);
658 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
659 avio_write(dyn_cp, par->extradata, par->extradata_size);
665 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
666 AVCodecParameters *par,
667 int native_id, int qt_id)
671 int ret, codecpriv_size;
673 ret = avio_open_dyn_buf(&dyn_cp);
678 ret = mkv_write_native_codecprivate(s, par, dyn_cp);
679 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
682 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
684 if (par->extradata_size) {
685 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
686 && ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id
689 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
690 avio_wl32(dyn_cp, par->codec_tag);
691 for(i = 0; i < 0x5a - 8; i++)
694 avio_write(dyn_cp, par->extradata, par->extradata_size);
697 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
698 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
699 avcodec_get_name(par->codec_id));
702 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
704 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
705 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
706 avcodec_get_name(par->codec_id));
707 ret = AVERROR(EINVAL);
710 ff_put_bmp_header(dyn_cp, par, ff_codec_bmp_tags, 0, 0);
712 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
714 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
716 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
717 avcodec_get_name(par->codec_id));
718 ret = AVERROR(EINVAL);
721 par->codec_tag = tag;
723 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
726 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
728 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
734 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
735 int side_data_size = 0;
736 const uint8_t *side_data = av_stream_get_side_data(
737 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA, &side_data_size);
738 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, 0);
740 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
741 par->color_trc < AVCOL_TRC_NB) {
742 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
745 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
746 par->color_space < AVCOL_SPC_NB) {
747 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
749 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
750 par->color_primaries < AVCOL_PRI_NB) {
751 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
753 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
754 par->color_range < AVCOL_RANGE_NB) {
755 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
757 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
758 ebml_master meta_element = start_ebml_master(
759 pb, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
760 const AVMasteringDisplayMetadata *metadata =
761 (const AVMasteringDisplayMetadata*)side_data;
762 if (metadata->has_primaries) {
763 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_RX,
764 av_q2d(metadata->display_primaries[0][0]));
765 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_RY,
766 av_q2d(metadata->display_primaries[0][1]));
767 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_GX,
768 av_q2d(metadata->display_primaries[1][0]));
769 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_GY,
770 av_q2d(metadata->display_primaries[1][1]));
771 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_BX,
772 av_q2d(metadata->display_primaries[2][0]));
773 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_BY,
774 av_q2d(metadata->display_primaries[2][1]));
775 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_WHITEX,
776 av_q2d(metadata->white_point[0]));
777 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_WHITEY,
778 av_q2d(metadata->white_point[1]));
780 if (metadata->has_luminance) {
781 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
782 av_q2d(metadata->max_luminance));
783 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
784 av_q2d(metadata->min_luminance));
786 end_ebml_master(pb, meta_element);
788 end_ebml_master(pb, colorinfo);
792 static void mkv_write_field_order(AVIOContext *pb,
793 enum AVFieldOrder field_order)
795 switch (field_order) {
796 case AV_FIELD_UNKNOWN:
797 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
798 MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED);
800 case AV_FIELD_PROGRESSIVE:
801 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
802 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
808 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
809 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
810 switch (field_order) {
812 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
813 MATROSKA_VIDEO_FIELDORDER_TT);
816 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
817 MATROSKA_VIDEO_FIELDORDER_BB);
820 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
821 MATROSKA_VIDEO_FIELDORDER_TB);
824 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
825 MATROSKA_VIDEO_FIELDORDER_BT);
831 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
832 AVStream *st, int mode, int *h_width, int *h_height)
836 AVDictionaryEntry *tag;
837 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
841 // convert metadata into proper side data and add it to the stream
842 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
843 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
844 int stereo_mode = atoi(tag->value);
846 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
847 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
852 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
853 stereo_mode != 10 && stereo_mode != 12) {
854 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
860 // iterate to find the stereo3d side data
861 for (i = 0; i < st->nb_side_data; i++) {
862 AVPacketSideData sd = st->side_data[i];
863 if (sd.type == AV_PKT_DATA_STEREO3D) {
864 AVStereo3D *stereo = (AVStereo3D *)sd.data;
866 switch (stereo->type) {
868 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
870 case AV_STEREO3D_SIDEBYSIDE:
871 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
872 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
873 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
876 case AV_STEREO3D_TOPBOTTOM:
877 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
878 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
882 case AV_STEREO3D_CHECKERBOARD:
883 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
884 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
887 case AV_STEREO3D_LINES:
888 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
889 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
893 case AV_STEREO3D_COLUMNS:
894 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
895 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
899 case AV_STEREO3D_FRAMESEQUENCE:
900 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
901 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
909 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
912 // if webm, do not write unsupported modes
913 if ((mode == MODE_WEBM &&
914 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
915 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
916 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
917 av_log(s, AV_LOG_ERROR,
918 "The specified stereo mode is not valid.\n");
919 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
920 return AVERROR(EINVAL);
923 // write StereoMode if format is valid
924 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
929 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
930 int i, AVIOContext *pb, int default_stream_exists)
932 AVStream *st = s->streams[i];
933 AVCodecParameters *par = st->codecpar;
934 ebml_master subinfo, track;
937 int bit_depth = av_get_bits_per_sample(par->codec_id);
938 int sample_rate = par->sample_rate;
939 int output_sample_rate = 0;
940 int display_width_div = 1;
941 int display_height_div = 1;
943 AVDictionaryEntry *tag;
945 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
946 mkv->have_attachments = 1;
950 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
951 if (par->bits_per_raw_sample)
952 bit_depth = par->bits_per_raw_sample;
954 bit_depth = av_get_bytes_per_sample(par->format) << 3;
957 bit_depth = par->bits_per_coded_sample;
959 if (par->codec_id == AV_CODEC_ID_AAC) {
960 ret = get_aac_sample_rates(s, par, &sample_rate, &output_sample_rate);
965 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
966 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
967 mkv->is_dash ? mkv->dash_track_number : i + 1);
968 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
969 mkv->is_dash ? mkv->dash_track_number : i + 1);
970 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
972 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
973 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
974 tag = av_dict_get(st->metadata, "language", NULL, 0);
975 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
976 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
977 } else if (tag && tag->value) {
978 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
981 // The default value for TRACKFLAGDEFAULT is 1, so add element
982 // if we need to clear it.
983 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
984 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
986 if (st->disposition & AV_DISPOSITION_FORCED)
987 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
989 if (mkv->mode == MODE_WEBM && par->codec_id == AV_CODEC_ID_WEBVTT) {
990 const char *codec_id;
991 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
992 codec_id = "D_WEBVTT/CAPTIONS";
993 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
994 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
995 codec_id = "D_WEBVTT/DESCRIPTIONS";
996 native_id = MATROSKA_TRACK_TYPE_METADATA;
997 } else if (st->disposition & AV_DISPOSITION_METADATA) {
998 codec_id = "D_WEBVTT/METADATA";
999 native_id = MATROSKA_TRACK_TYPE_METADATA;
1001 codec_id = "D_WEBVTT/SUBTITLES";
1002 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1004 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1006 // look for a codec ID string specific to mkv to use,
1007 // if none are found, use AVI codes
1008 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1009 if (ff_mkv_codec_tags[j].id == par->codec_id) {
1010 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1015 if (par->codec_id == AV_CODEC_ID_RAWVIDEO && !par->codec_tag) {
1016 if (mkv->allow_raw_vfw) {
1019 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1020 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1021 return AVERROR(EINVAL);
1026 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1027 int64_t codecdelay = av_rescale_q(par->initial_padding,
1028 (AVRational){ 1, 48000 },
1029 (AVRational){ 1, 1000000000 });
1030 if (codecdelay < 0) {
1031 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1032 return AVERROR(EINVAL);
1034 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1035 // (AVRational){ 1, par->sample_rate },
1038 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1040 if (par->codec_id == AV_CODEC_ID_OPUS) {
1041 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1044 if (mkv->mode == MODE_WEBM && !(par->codec_id == AV_CODEC_ID_VP8 ||
1045 par->codec_id == AV_CODEC_ID_VP9 ||
1046 par->codec_id == AV_CODEC_ID_OPUS ||
1047 par->codec_id == AV_CODEC_ID_VORBIS ||
1048 par->codec_id == AV_CODEC_ID_WEBVTT)) {
1049 av_log(s, AV_LOG_ERROR,
1050 "Only VP8 or VP9 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1051 return AVERROR(EINVAL);
1054 switch (par->codec_type) {
1055 case AVMEDIA_TYPE_VIDEO:
1056 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1058 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1059 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1060 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1062 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->time_base.num / st->time_base.den);
1065 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1066 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1067 par->codec_id == AV_CODEC_ID_SVQ1 ||
1068 par->codec_id == AV_CODEC_ID_SVQ3 ||
1069 par->codec_id == AV_CODEC_ID_CINEPAK))
1073 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1074 else if (!native_id) {
1075 // if there is no mkv-specific codec ID, use VFW mode
1076 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1077 mkv->tracks[i].write_dts = 1;
1078 s->internal->avoid_negative_ts_use_pts = 0;
1081 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1083 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1084 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1086 if (mkv->mode != MODE_WEBM)
1087 mkv_write_field_order(pb, par->field_order);
1089 // check both side data and metadata for stereo information,
1090 // write the result to the bitstream if any is found
1091 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1093 &display_height_div);
1097 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1098 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1099 (par->format == AV_PIX_FMT_YUVA420P)) {
1100 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1103 // write DisplayWidth and DisplayHeight, they contain the size of
1104 // a single source view and/or the display aspect ratio
1105 if (st->sample_aspect_ratio.num) {
1106 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1107 if (d_width > INT_MAX) {
1108 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1109 return AVERROR(EINVAL);
1111 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1112 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1113 } else if (display_width_div != 1 || display_height_div != 1) {
1114 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1115 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1118 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1119 uint32_t color_space = av_le2ne32(par->codec_tag);
1120 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1122 if (s->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
1123 mkv_write_video_color(pb, par, st);
1125 end_ebml_master(pb, subinfo);
1128 case AVMEDIA_TYPE_AUDIO:
1129 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1132 // no mkv-specific ID, use ACM mode
1133 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1135 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1136 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1137 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1138 if (output_sample_rate)
1139 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1141 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1142 end_ebml_master(pb, subinfo);
1145 case AVMEDIA_TYPE_SUBTITLE:
1147 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1148 return AVERROR(ENOSYS);
1151 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1152 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1154 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1157 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1158 return AVERROR(EINVAL);
1161 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1162 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1167 end_ebml_master(pb, track);
1172 static int mkv_write_tracks(AVFormatContext *s)
1174 MatroskaMuxContext *mkv = s->priv_data;
1175 AVIOContext *pb = s->pb;
1177 int i, ret, default_stream_exists = 0;
1179 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
1183 tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
1184 for (i = 0; i < s->nb_streams; i++) {
1185 AVStream *st = s->streams[i];
1186 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1188 for (i = 0; i < s->nb_streams; i++) {
1189 ret = mkv_write_track(s, mkv, i, pb, default_stream_exists);
1193 end_ebml_master(pb, tracks);
1197 static int mkv_write_chapters(AVFormatContext *s)
1199 MatroskaMuxContext *mkv = s->priv_data;
1200 AVIOContext *pb = s->pb;
1201 ebml_master chapters, editionentry;
1202 AVRational scale = {1, 1E9};
1205 if (!s->nb_chapters || mkv->wrote_chapters)
1208 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1209 if (ret < 0) return ret;
1211 chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
1212 editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
1213 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1214 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1215 for (i = 0; i < s->nb_chapters; i++) {
1216 ebml_master chapteratom, chapterdisplay;
1217 AVChapter *c = s->chapters[i];
1218 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1219 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1220 AVDictionaryEntry *t = NULL;
1221 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1222 av_log(s, AV_LOG_ERROR,
1223 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1224 chapterstart, chapterend);
1225 return AVERROR_INVALIDDATA;
1228 chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
1229 put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1230 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1231 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1232 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1233 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1234 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1235 chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
1236 put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
1237 put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und");
1238 end_ebml_master(pb, chapterdisplay);
1240 end_ebml_master(pb, chapteratom);
1242 end_ebml_master(pb, editionentry);
1243 end_ebml_master(pb, chapters);
1245 mkv->wrote_chapters = 1;
1249 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1251 uint8_t *key = av_strdup(t->key);
1253 const uint8_t *lang = NULL;
1257 return AVERROR(ENOMEM);
1259 if ((p = strrchr(p, '-')) &&
1260 (lang = av_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1267 else if (*p >= 'a' && *p <= 'z')
1272 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1273 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1275 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1276 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1277 end_ebml_master(pb, tag);
1283 static int mkv_write_tag_targets(AVFormatContext *s,
1284 unsigned int elementid, unsigned int uid,
1285 ebml_master *tags, ebml_master* tag)
1287 MatroskaMuxContext *mkv = s->priv_data;
1288 ebml_master targets;
1292 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1293 if (ret < 0) return ret;
1295 *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
1298 *tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
1299 targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
1301 put_ebml_uint(s->pb, elementid, uid);
1302 end_ebml_master(s->pb, targets);
1306 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
1307 unsigned int uid, ebml_master *tags)
1311 AVDictionaryEntry *t = NULL;
1313 ret = mkv_write_tag_targets(s, elementid, uid, tags, &tag);
1317 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1318 if (av_strcasecmp(t->key, "title") &&
1319 av_strcasecmp(t->key, "stereo_mode") &&
1320 av_strcasecmp(t->key, "creation_time") &&
1321 av_strcasecmp(t->key, "encoding_tool") &&
1322 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1323 av_strcasecmp(t->key, "language"))) {
1324 ret = mkv_write_simpletag(s->pb, t);
1330 end_ebml_master(s->pb, tag);
1334 static int mkv_check_tag(AVDictionary *m)
1336 AVDictionaryEntry *t = NULL;
1338 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1339 if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode"))
1345 static int mkv_write_tags(AVFormatContext *s)
1347 MatroskaMuxContext *mkv = s->priv_data;
1348 ebml_master tags = {0};
1351 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1353 if (mkv_check_tag(s->metadata)) {
1354 ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
1355 if (ret < 0) return ret;
1358 for (i = 0; i < s->nb_streams; i++) {
1359 AVStream *st = s->streams[i];
1361 if (!mkv_check_tag(st->metadata))
1364 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
1365 if (ret < 0) return ret;
1368 if (!mkv->is_live) {
1369 for (i = 0; i < s->nb_streams; i++) {
1370 ebml_master tag_target;
1373 mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags, &tag_target);
1375 tag = start_ebml_master(s->pb, MATROSKA_ID_SIMPLETAG, 0);
1376 put_ebml_string(s->pb, MATROSKA_ID_TAGNAME, "DURATION");
1377 mkv->stream_duration_offsets[i] = avio_tell(s->pb);
1379 // Reserve space to write duration as a 20-byte string.
1380 // 2 (ebml id) + 1 (data size) + 20 (data)
1381 put_ebml_void(s->pb, 23);
1382 end_ebml_master(s->pb, tag);
1383 end_ebml_master(s->pb, tag_target);
1387 for (i = 0; i < s->nb_chapters; i++) {
1388 AVChapter *ch = s->chapters[i];
1390 if (!mkv_check_tag(ch->metadata))
1393 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &tags);
1394 if (ret < 0) return ret;
1398 end_ebml_master(s->pb, tags);
1402 static int mkv_write_attachments(AVFormatContext *s)
1404 MatroskaMuxContext *mkv = s->priv_data;
1405 AVIOContext *pb = s->pb;
1406 ebml_master attachments;
1410 if (!mkv->have_attachments)
1413 av_lfg_init(&c, av_get_random_seed());
1415 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1416 if (ret < 0) return ret;
1418 attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0);
1420 for (i = 0; i < s->nb_streams; i++) {
1421 AVStream *st = s->streams[i];
1422 ebml_master attached_file;
1423 AVDictionaryEntry *t;
1424 const char *mimetype = NULL;
1427 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1430 attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0);
1432 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1433 put_ebml_string(pb, MATROSKA_ID_FILEDESC, t->value);
1434 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1435 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1436 return AVERROR(EINVAL);
1438 put_ebml_string(pb, MATROSKA_ID_FILENAME, t->value);
1439 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1440 mimetype = t->value;
1441 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1443 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1444 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1445 mimetype = ff_mkv_mime_tags[i].str;
1448 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1449 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1450 mimetype = ff_mkv_image_mime_tags[i].str;
1455 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1456 "it cannot be deduced from the codec id.\n", i);
1457 return AVERROR(EINVAL);
1460 if (s->flags & AVFMT_FLAG_BITEXACT) {
1461 struct AVSHA *sha = av_sha_alloc();
1464 return AVERROR(ENOMEM);
1465 av_sha_init(sha, 160);
1466 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1467 av_sha_final(sha, digest);
1469 fileuid = AV_RL64(digest);
1471 fileuid = av_lfg_get(&c);
1473 av_log(s, AV_LOG_VERBOSE, "Using %.16"PRIx64" for attachment %d\n",
1476 put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype);
1477 put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1478 put_ebml_uint(pb, MATROSKA_ID_FILEUID, fileuid);
1479 end_ebml_master(pb, attached_file);
1481 end_ebml_master(pb, attachments);
1486 static int mkv_write_header(AVFormatContext *s)
1488 MatroskaMuxContext *mkv = s->priv_data;
1489 AVIOContext *pb = s->pb;
1490 ebml_master ebml_header, segment_info;
1491 AVDictionaryEntry *tag;
1492 int ret, i, version = 2;
1493 int64_t creation_time;
1495 if (!strcmp(s->oformat->name, "webm"))
1496 mkv->mode = MODE_WEBM;
1498 mkv->mode = MODE_MATROSKAv2;
1500 if (mkv->mode != MODE_WEBM ||
1501 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1502 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1505 for (i = 0; i < s->nb_streams; i++) {
1506 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
1507 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
1508 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
1509 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
1510 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
1511 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
1512 av_log(s, AV_LOG_ERROR,
1513 "The Matroska muxer does not yet support muxing %s\n",
1514 avcodec_get_name(s->streams[i]->codecpar->codec_id));
1515 return AVERROR_PATCHWELCOME;
1517 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1518 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1519 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1523 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1525 ret = AVERROR(ENOMEM);
1528 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1529 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1530 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1531 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1532 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1533 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1534 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1535 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1536 end_ebml_master(pb, ebml_header);
1538 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1539 mkv->segment_offset = avio_tell(pb);
1541 // we write 2 seek heads - one at the end of the file to point to each
1542 // cluster, and one at the beginning to point to all other level one
1543 // elements (including the seek head at the end of the file), which
1544 // isn't more than 10 elements if we only write one of each other
1545 // currently defined level 1 element
1546 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1547 if (!mkv->main_seekhead) {
1548 ret = AVERROR(ENOMEM);
1552 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1553 if (ret < 0) goto fail;
1555 segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
1556 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1557 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1558 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1559 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1560 uint32_t segment_uid[4];
1563 av_lfg_init(&lfg, av_get_random_seed());
1565 for (i = 0; i < 4; i++)
1566 segment_uid[i] = av_lfg_get(&lfg);
1568 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1569 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1570 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1572 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1573 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1575 const char *ident = "Lavf";
1576 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1577 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1580 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1581 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1582 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1583 uint8_t date_utc_buf[8];
1584 AV_WB64(date_utc_buf, date_utc);
1585 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1588 // reserve space for the duration
1590 mkv->duration_offset = avio_tell(pb);
1591 if (!mkv->is_live) {
1592 put_ebml_void(pb, 11); // assumes double-precision float to be written
1594 end_ebml_master(pb, segment_info);
1596 // initialize stream_duration fields
1597 mkv->stream_durations = av_mallocz(s->nb_streams * sizeof(int64_t));
1598 mkv->stream_duration_offsets = av_mallocz(s->nb_streams * sizeof(int64_t));
1600 ret = mkv_write_tracks(s);
1604 for (i = 0; i < s->nb_chapters; i++)
1605 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1607 if (mkv->mode != MODE_WEBM) {
1608 ret = mkv_write_chapters(s);
1612 ret = mkv_write_tags(s);
1616 ret = mkv_write_attachments(s);
1621 if (!s->pb->seekable && !mkv->is_live)
1622 mkv_write_seekhead(pb, mkv);
1624 mkv->cues = mkv_start_cues(mkv->segment_offset);
1626 ret = AVERROR(ENOMEM);
1629 if (pb->seekable && mkv->reserve_cues_space) {
1630 mkv->cues_pos = avio_tell(pb);
1631 put_ebml_void(pb, mkv->reserve_cues_space);
1634 av_init_packet(&mkv->cur_audio_pkt);
1635 mkv->cur_audio_pkt.size = 0;
1636 mkv->cluster_pos = -1;
1640 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1641 // after 4k and on a keyframe
1643 if (mkv->cluster_time_limit < 0)
1644 mkv->cluster_time_limit = 5000;
1645 if (mkv->cluster_size_limit < 0)
1646 mkv->cluster_size_limit = 5 * 1024 * 1024;
1648 if (mkv->cluster_time_limit < 0)
1649 mkv->cluster_time_limit = 1000;
1650 if (mkv->cluster_size_limit < 0)
1651 mkv->cluster_size_limit = 32 * 1024;
1660 static int mkv_blockgroup_size(int pkt_size)
1662 int size = pkt_size + 4;
1663 size += ebml_num_size(size);
1664 size += 2; // EBML ID for block and block duration
1665 size += 8; // max size of block duration
1666 size += ebml_num_size(size);
1667 size += 1; // blockgroup EBML ID
1671 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1678 dst = av_malloc(srclen);
1680 return AVERROR(ENOMEM);
1682 while (srclen >= WV_HEADER_SIZE) {
1685 ret = ff_wv_parse_header(&header, src);
1688 src += WV_HEADER_SIZE;
1689 srclen -= WV_HEADER_SIZE;
1691 if (srclen < header.blocksize) {
1692 ret = AVERROR_INVALIDDATA;
1696 if (header.initial) {
1697 AV_WL32(dst + offset, header.samples);
1700 AV_WL32(dst + offset, header.flags);
1701 AV_WL32(dst + offset + 4, header.crc);
1704 if (!(header.initial && header.final)) {
1705 AV_WL32(dst + offset, header.blocksize);
1709 memcpy(dst + offset, src, header.blocksize);
1710 src += header.blocksize;
1711 srclen -= header.blocksize;
1712 offset += header.blocksize;
1724 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1725 unsigned int blockid, AVPacket *pkt, int keyframe)
1727 MatroskaMuxContext *mkv = s->priv_data;
1728 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1729 uint8_t *data = NULL, *side_data = NULL;
1730 int offset = 0, size = pkt->size, side_data_size = 0;
1731 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1732 uint64_t additional_id = 0;
1733 int64_t discard_padding = 0;
1734 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
1735 ebml_master block_group, block_additions, block_more;
1737 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1738 "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", keyframe %d\n",
1739 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration,
1741 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
1742 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
1743 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1744 else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
1745 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
1746 /* extradata is Annex B, assume the bitstream is too and convert it */
1747 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1748 else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
1749 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
1751 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
1757 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
1758 /* Matroska specification requires to remove the first QuickTime atom
1764 side_data = av_packet_get_side_data(pkt,
1765 AV_PKT_DATA_SKIP_SAMPLES,
1768 if (side_data && side_data_size >= 10) {
1769 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
1770 (AVRational){1, par->sample_rate},
1771 (AVRational){1, 1000000000});
1774 side_data = av_packet_get_side_data(pkt,
1775 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
1778 additional_id = AV_RB64(side_data);
1780 side_data_size -= 8;
1783 if ((side_data_size && additional_id == 1) || discard_padding) {
1784 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
1785 blockid = MATROSKA_ID_BLOCK;
1788 put_ebml_id(pb, blockid);
1789 put_ebml_num(pb, size + 4, 0);
1790 // this assumes stream_index is less than 126
1791 avio_w8(pb, 0x80 | track_number);
1792 avio_wb16(pb, ts - mkv->cluster_pts);
1793 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
1794 avio_write(pb, data + offset, size);
1795 if (data != pkt->data)
1798 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
1799 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE,
1800 mkv->last_track_timestamp[track_number - 1]);
1802 mkv->last_track_timestamp[track_number - 1] = ts - mkv->cluster_pts;
1804 if (discard_padding) {
1805 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
1808 if (side_data_size && additional_id == 1) {
1809 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
1810 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
1811 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
1812 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
1813 put_ebml_num(pb, side_data_size, 0);
1814 avio_write(pb, side_data, side_data_size);
1815 end_ebml_master(pb, block_more);
1816 end_ebml_master(pb, block_additions);
1818 if ((side_data_size && additional_id == 1) || discard_padding) {
1819 end_ebml_master(pb, block_group);
1823 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1825 MatroskaMuxContext *mkv = s->priv_data;
1826 ebml_master blockgroup;
1827 int id_size, settings_size, size;
1828 uint8_t *id, *settings;
1829 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1830 const int flags = 0;
1833 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
1837 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
1840 size = id_size + 1 + settings_size + 1 + pkt->size;
1842 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1843 "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", flags %d\n",
1844 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
1846 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1848 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1849 put_ebml_num(pb, size + 4, 0);
1850 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1851 avio_wb16(pb, ts - mkv->cluster_pts);
1853 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
1855 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
1856 end_ebml_master(pb, blockgroup);
1858 return pkt->duration;
1861 static void mkv_flush_dynbuf(AVFormatContext *s)
1863 MatroskaMuxContext *mkv = s->priv_data;
1870 bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
1871 avio_write(s->pb, dyn_buf, bufsize);
1876 static void mkv_start_new_cluster(AVFormatContext *s, AVPacket *pkt)
1878 MatroskaMuxContext *mkv = s->priv_data;
1881 if (s->pb->seekable) {
1887 av_log(s, AV_LOG_DEBUG,
1888 "Starting new cluster at offset %" PRIu64 " bytes, "
1889 "pts %" PRIu64 "dts %" PRIu64 "\n",
1890 avio_tell(pb), pkt->pts, pkt->dts);
1891 end_ebml_master(pb, mkv->cluster);
1892 mkv->cluster_pos = -1;
1894 mkv_flush_dynbuf(s);
1898 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
1900 MatroskaMuxContext *mkv = s->priv_data;
1901 AVIOContext *pb = s->pb;
1902 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1903 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1904 int duration = pkt->duration;
1906 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1907 int64_t relative_packet_pos;
1908 int dash_tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
1910 if (ts == AV_NOPTS_VALUE) {
1911 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
1912 return AVERROR(EINVAL);
1914 ts += mkv->tracks[pkt->stream_index].ts_offset;
1916 if (mkv->cluster_pos != -1) {
1917 int64_t cluster_time = ts - mkv->cluster_pts + mkv->tracks[pkt->stream_index].ts_offset;
1918 if ((int16_t)cluster_time != cluster_time) {
1919 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
1920 mkv_start_new_cluster(s, pkt);
1924 if (!s->pb->seekable) {
1926 ret = avio_open_dyn_buf(&mkv->dyn_bc);
1928 av_log(s, AV_LOG_ERROR, "Failed to open dynamic buffer\n");
1935 if (mkv->cluster_pos == -1) {
1936 mkv->cluster_pos = avio_tell(s->pb);
1937 mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
1938 put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
1939 mkv->cluster_pts = FFMAX(0, ts);
1942 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1944 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1945 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
1946 if (s->pb->seekable && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
1947 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
1948 if (ret < 0) return ret;
1951 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1952 duration = mkv_write_vtt_blocks(s, pb, pkt);
1954 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1955 mkv_blockgroup_size(pkt->size));
1957 #if FF_API_CONVERGENCE_DURATION
1958 FF_DISABLE_DEPRECATION_WARNINGS
1959 /* For backward compatibility, prefer convergence_duration. */
1960 if (pkt->convergence_duration > 0) {
1961 duration = pkt->convergence_duration;
1963 FF_ENABLE_DEPRECATION_WARNINGS
1965 /* All subtitle blocks are considered to be keyframes. */
1966 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
1967 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1968 end_ebml_master(pb, blockgroup);
1971 if (s->pb->seekable) {
1972 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts,
1973 mkv->cluster_pos, relative_packet_pos, duration);
1979 mkv->duration = FFMAX(mkv->duration, ts + duration);
1981 if (mkv->stream_durations)
1982 mkv->stream_durations[pkt->stream_index] =
1983 FFMAX(mkv->stream_durations[pkt->stream_index], ts + duration);
1988 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
1990 MatroskaMuxContext *mkv = s->priv_data;
1991 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
1992 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1994 int64_t cluster_time;
1996 int start_new_cluster;
1998 if (mkv->tracks[pkt->stream_index].write_dts)
1999 cluster_time = pkt->dts - mkv->cluster_pts;
2001 cluster_time = pkt->pts - mkv->cluster_pts;
2002 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2004 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
2005 // after 4k and on a keyframe
2006 if (s->pb->seekable) {
2007 cluster_size = avio_tell(s->pb) - mkv->cluster_pos;
2009 cluster_size = avio_tell(mkv->dyn_bc);
2012 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2013 // WebM DASH specification states that the first block of every cluster
2014 // has to be a key frame. So for DASH video, we only create a cluster
2015 // on seeing key frames.
2016 start_new_cluster = keyframe;
2017 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2018 (mkv->cluster_pos == -1 ||
2019 cluster_time > mkv->cluster_time_limit)) {
2020 // For DASH audio, we create a Cluster based on cluster_time_limit
2021 start_new_cluster = 1;
2022 } else if (!mkv->is_dash &&
2023 (cluster_size > mkv->cluster_size_limit ||
2024 cluster_time > mkv->cluster_time_limit ||
2025 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2026 cluster_size > 4 * 1024))) {
2027 start_new_cluster = 1;
2029 start_new_cluster = 0;
2032 if (mkv->cluster_pos != -1 && start_new_cluster) {
2033 mkv_start_new_cluster(s, pkt);
2036 // check if we have an audio packet cached
2037 if (mkv->cur_audio_pkt.size > 0) {
2038 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2039 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2040 mkv->is_dash ? start_new_cluster : 0);
2041 av_packet_unref(&mkv->cur_audio_pkt);
2043 av_log(s, AV_LOG_ERROR,
2044 "Could not write cached audio packet ret:%d\n", ret);
2049 // buffer an audio packet to ensure the packet containing the video
2050 // keyframe's timecode is contained in the same cluster for WebM
2051 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2052 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2054 ret = mkv_write_packet_internal(s, pkt, 0);
2058 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2060 MatroskaMuxContext *mkv = s->priv_data;
2062 if (s->pb->seekable)
2067 if (mkv->cluster_pos != -1) {
2068 av_log(s, AV_LOG_DEBUG,
2069 "Flushing cluster at offset %" PRIu64 " bytes\n",
2071 end_ebml_master(pb, mkv->cluster);
2072 mkv->cluster_pos = -1;
2074 mkv_flush_dynbuf(s);
2079 return mkv_write_packet(s, pkt);
2082 static int mkv_write_trailer(AVFormatContext *s)
2084 MatroskaMuxContext *mkv = s->priv_data;
2085 AVIOContext *pb = s->pb;
2086 int64_t currentpos, cuespos;
2089 // check if we have an audio packet cached
2090 if (mkv->cur_audio_pkt.size > 0) {
2091 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2092 av_packet_unref(&mkv->cur_audio_pkt);
2094 av_log(s, AV_LOG_ERROR,
2095 "Could not write cached audio packet ret:%d\n", ret);
2101 end_ebml_master(mkv->dyn_bc, mkv->cluster);
2102 mkv_flush_dynbuf(s);
2103 } else if (mkv->cluster_pos != -1) {
2104 end_ebml_master(pb, mkv->cluster);
2107 if (mkv->mode != MODE_WEBM) {
2108 ret = mkv_write_chapters(s);
2114 if (mkv->cues->num_entries) {
2115 if (mkv->reserve_cues_space) {
2118 currentpos = avio_tell(pb);
2119 avio_seek(pb, mkv->cues_pos, SEEK_SET);
2121 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2122 cues_end = avio_tell(pb);
2123 if (cues_end > cuespos + mkv->reserve_cues_space) {
2124 av_log(s, AV_LOG_ERROR,
2125 "Insufficient space reserved for cues: %d "
2126 "(needed: %" PRId64 ").\n",
2127 mkv->reserve_cues_space, cues_end - cuespos);
2128 return AVERROR(EINVAL);
2131 if (cues_end < cuespos + mkv->reserve_cues_space)
2132 put_ebml_void(pb, mkv->reserve_cues_space -
2133 (cues_end - cuespos));
2135 avio_seek(pb, currentpos, SEEK_SET);
2137 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2140 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES,
2146 mkv_write_seekhead(pb, mkv);
2148 // update the duration
2149 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2150 currentpos = avio_tell(pb);
2151 avio_seek(pb, mkv->duration_offset, SEEK_SET);
2152 put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
2154 // update stream durations
2155 if (mkv->stream_durations) {
2157 for (i = 0; i < s->nb_streams; ++i) {
2158 AVStream *st = s->streams[i];
2159 double duration_sec = mkv->stream_durations[i] * av_q2d(st->time_base);
2160 char duration_string[20] = "";
2162 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2163 mkv->stream_durations[i]);
2165 if (!mkv->is_live && mkv->stream_duration_offsets[i] > 0) {
2166 avio_seek(pb, mkv->stream_duration_offsets[i], SEEK_SET);
2168 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2169 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2170 fmod(duration_sec, 60));
2172 put_ebml_binary(pb, MATROSKA_ID_TAGSTRING, duration_string, 20);
2177 avio_seek(pb, currentpos, SEEK_SET);
2180 if (!mkv->is_live) {
2181 end_ebml_master(pb, mkv->segment);
2188 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2191 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2192 if (ff_mkv_codec_tags[i].id == codec_id)
2195 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2196 enum AVMediaType type = avcodec_get_type(codec_id);
2197 // mkv theoretically supports any video/audio through VFW/ACM
2198 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2205 static int mkv_init(struct AVFormatContext *s)
2209 if (s->avoid_negative_ts < 0) {
2210 s->avoid_negative_ts = 1;
2211 s->internal->avoid_negative_ts_use_pts = 1;
2214 for (i = 0; i < s->nb_streams; i++) {
2215 // ms precision is the de-facto standard timescale for mkv files
2216 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2222 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2225 AVStream *st = s->streams[pkt->stream_index];
2227 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2228 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2229 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2230 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2231 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2237 static const AVCodecTag additional_audio_tags[] = {
2238 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2239 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
2240 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2241 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2242 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2243 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2244 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2245 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2246 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2247 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2248 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2249 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2250 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2253 static const AVCodecTag additional_video_tags[] = {
2254 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2255 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2256 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2257 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
2258 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
2259 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2262 static const AVCodecTag additional_subtitle_tags[] = {
2263 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2264 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2265 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2268 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2269 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2270 static const AVOption options[] = {
2271 { "reserve_index_space", "Reserve a given amount of space (in bytes) at the beginning of the file for the index (cues).", OFFSET(reserve_cues_space), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
2272 { "cluster_size_limit", "Store at most the provided amount of bytes in a cluster. ", OFFSET(cluster_size_limit), AV_OPT_TYPE_INT , { .i64 = -1 }, -1, INT_MAX, FLAGS },
2273 { "cluster_time_limit", "Store at most the provided number of milliseconds in a cluster.", OFFSET(cluster_time_limit), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, FLAGS },
2274 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2275 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2276 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2277 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2281 #if CONFIG_MATROSKA_MUXER
2282 static const AVClass matroska_class = {
2283 .class_name = "matroska muxer",
2284 .item_name = av_default_item_name,
2286 .version = LIBAVUTIL_VERSION_INT,
2289 AVOutputFormat ff_matroska_muxer = {
2291 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2292 .mime_type = "video/x-matroska",
2293 .extensions = "mkv",
2294 .priv_data_size = sizeof(MatroskaMuxContext),
2295 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2296 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2297 .video_codec = CONFIG_LIBX264_ENCODER ?
2298 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2300 .write_header = mkv_write_header,
2301 .write_packet = mkv_write_flush_packet,
2302 .write_trailer = mkv_write_trailer,
2303 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2304 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2305 .codec_tag = (const AVCodecTag* const []){
2306 ff_codec_bmp_tags, ff_codec_wav_tags,
2307 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2309 .subtitle_codec = AV_CODEC_ID_ASS,
2310 .query_codec = mkv_query_codec,
2311 .check_bitstream = mkv_check_bitstream,
2312 .priv_class = &matroska_class,
2316 #if CONFIG_WEBM_MUXER
2317 static const AVClass webm_class = {
2318 .class_name = "webm muxer",
2319 .item_name = av_default_item_name,
2321 .version = LIBAVUTIL_VERSION_INT,
2324 AVOutputFormat ff_webm_muxer = {
2326 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2327 .mime_type = "video/webm",
2328 .extensions = "webm",
2329 .priv_data_size = sizeof(MatroskaMuxContext),
2330 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2331 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2332 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2334 .write_header = mkv_write_header,
2335 .write_packet = mkv_write_flush_packet,
2336 .write_trailer = mkv_write_trailer,
2337 .check_bitstream = mkv_check_bitstream,
2338 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2339 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2340 .priv_class = &webm_class,
2344 #if CONFIG_MATROSKA_AUDIO_MUXER
2345 static const AVClass mka_class = {
2346 .class_name = "matroska audio muxer",
2347 .item_name = av_default_item_name,
2349 .version = LIBAVUTIL_VERSION_INT,
2351 AVOutputFormat ff_matroska_audio_muxer = {
2353 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2354 .mime_type = "audio/x-matroska",
2355 .extensions = "mka",
2356 .priv_data_size = sizeof(MatroskaMuxContext),
2357 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2358 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2359 .video_codec = AV_CODEC_ID_NONE,
2361 .write_header = mkv_write_header,
2362 .write_packet = mkv_write_flush_packet,
2363 .write_trailer = mkv_write_trailer,
2364 .check_bitstream = mkv_check_bitstream,
2365 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2367 .codec_tag = (const AVCodecTag* const []){
2368 ff_codec_wav_tags, additional_audio_tags, 0
2370 .priv_class = &mka_class,