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/crc.h"
41 #include "libavutil/dict.h"
42 #include "libavutil/intfloat.h"
43 #include "libavutil/intreadwrite.h"
44 #include "libavutil/lfg.h"
45 #include "libavutil/mastering_display_metadata.h"
46 #include "libavutil/mathematics.h"
47 #include "libavutil/opt.h"
48 #include "libavutil/parseutils.h"
49 #include "libavutil/random_seed.h"
50 #include "libavutil/rational.h"
51 #include "libavutil/samplefmt.h"
52 #include "libavutil/sha.h"
53 #include "libavutil/stereo3d.h"
55 #include "libavcodec/xiph.h"
56 #include "libavcodec/mpeg4audio.h"
57 #include "libavcodec/internal.h"
59 typedef struct ebml_master {
60 int64_t pos; ///< absolute offset in the file where the master's elements start
61 int sizebytes; ///< how many bytes were reserved for the size
64 typedef struct mkv_seekhead_entry {
65 unsigned int elementid;
69 typedef struct mkv_seekhead {
71 int64_t segment_offset; ///< the file offset to the beginning of the segment
72 int reserved_size; ///< -1 if appending to file
74 mkv_seekhead_entry *entries;
78 typedef struct mkv_cuepoint {
82 int64_t cluster_pos; ///< file offset of the cluster containing the block
83 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
84 int64_t duration; ///< duration of the block according to time base
87 typedef struct mkv_cues {
88 int64_t segment_offset;
89 mkv_cuepoint *entries;
93 typedef struct mkv_track {
99 typedef struct mkv_attachment {
104 typedef struct mkv_attachments {
105 mkv_attachment *entries;
109 #define MODE_MATROSKAv2 0x01
110 #define MODE_WEBM 0x02
112 /** Maximum number of tracks allowed in a Matroska file (with track numbers in
113 * range 1 to 126 (inclusive) */
114 #define MAX_TRACKS 126
116 typedef struct MatroskaMuxContext {
117 const AVClass *class;
120 AVIOContext *tags_bc;
122 AVIOContext *info_bc;
124 AVIOContext *tracks_bc;
125 ebml_master tracks_master;
127 int64_t segment_offset;
129 int64_t cluster_pos; ///< file offset of the current cluster
131 int64_t duration_offset;
133 mkv_seekhead *main_seekhead;
136 mkv_attachments *attachments;
138 AVPacket cur_audio_pkt;
140 int have_attachments;
143 int reserve_cues_space;
144 int cluster_size_limit;
146 int64_t cluster_time_limit;
148 int dash_track_number;
152 uint32_t chapter_id_offset;
155 int64_t last_track_timestamp[MAX_TRACKS];
157 int64_t* stream_durations;
158 int64_t* stream_duration_offsets;
161 } MatroskaMuxContext;
164 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
165 * offset, 4 bytes for target EBML ID */
166 #define MAX_SEEKENTRY_SIZE 21
168 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 4
170 #define MAX_CUETRACKPOS_SIZE 42
172 /** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */
173 #define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE * num_tracks
175 /** Seek preroll value for opus */
176 #define OPUS_SEEK_PREROLL 80000000
178 static int ebml_id_size(unsigned int id)
180 return (av_log2(id + 1) - 1) / 7 + 1;
183 static void put_ebml_id(AVIOContext *pb, unsigned int id)
185 int i = ebml_id_size(id);
187 avio_w8(pb, (uint8_t)(id >> (i * 8)));
191 * Write an EBML size meaning "unknown size".
193 * @param bytes The number of bytes the size should occupy (maximum: 8).
195 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
197 av_assert0(bytes <= 8);
198 avio_w8(pb, 0x1ff >> bytes);
199 ffio_fill(pb, 0xff, bytes - 1);
203 * Calculate how many bytes are needed to represent a given number in EBML.
205 static int ebml_num_size(uint64_t num)
208 while ((num + 1) >> bytes * 7)
214 * Write a number in EBML variable length format.
216 * @param bytes The number of bytes that need to be used to write the number.
217 * If zero, any number of bytes can be used.
219 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
221 int i, needed_bytes = ebml_num_size(num);
223 // sizes larger than this are currently undefined in EBML
224 av_assert0(num < (1ULL << 56) - 1);
227 // don't care how many bytes are used, so use the min
228 bytes = needed_bytes;
229 // the bytes needed to write the given size would exceed the bytes
230 // that we need to use, so write unknown size. This shouldn't happen.
231 av_assert0(bytes >= needed_bytes);
233 num |= 1ULL << bytes * 7;
234 for (i = bytes - 1; i >= 0; i--)
235 avio_w8(pb, (uint8_t)(num >> i * 8));
238 static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val)
245 put_ebml_id(pb, elementid);
246 put_ebml_num(pb, bytes, 0);
247 for (i = bytes - 1; i >= 0; i--)
248 avio_w8(pb, (uint8_t)(val >> i * 8));
251 static void put_ebml_sint(AVIOContext *pb, unsigned int elementid, int64_t val)
254 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
256 while (tmp>>=8) bytes++;
258 put_ebml_id(pb, elementid);
259 put_ebml_num(pb, bytes, 0);
260 for (i = bytes - 1; i >= 0; i--)
261 avio_w8(pb, (uint8_t)(val >> i * 8));
264 static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val)
266 put_ebml_id(pb, elementid);
267 put_ebml_num(pb, 8, 0);
268 avio_wb64(pb, av_double2int(val));
271 static void put_ebml_binary(AVIOContext *pb, unsigned int elementid,
272 const void *buf, int size)
274 put_ebml_id(pb, elementid);
275 put_ebml_num(pb, size, 0);
276 avio_write(pb, buf, size);
279 static void put_ebml_string(AVIOContext *pb, unsigned int elementid,
282 put_ebml_binary(pb, elementid, str, strlen(str));
286 * Write a void element of a given size. Useful for reserving space in
287 * the file to be written to later.
289 * @param size The number of bytes to reserve, which must be at least 2.
291 static void put_ebml_void(AVIOContext *pb, uint64_t size)
293 int64_t currentpos = avio_tell(pb);
295 av_assert0(size >= 2);
297 put_ebml_id(pb, EBML_ID_VOID);
298 // we need to subtract the length needed to store the size from the
299 // size we need to reserve so 2 cases, we use 8 bytes to store the
300 // size if possible, 1 byte otherwise
302 put_ebml_num(pb, size - 2, 0);
304 put_ebml_num(pb, size - 9, 8);
305 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
308 static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid,
309 uint64_t expectedsize)
311 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
312 put_ebml_id(pb, elementid);
313 put_ebml_size_unknown(pb, bytes);
314 return (ebml_master) {avio_tell(pb), bytes };
317 static void end_ebml_master(AVIOContext *pb, ebml_master master)
319 int64_t pos = avio_tell(pb);
321 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
323 put_ebml_num(pb, pos - master.pos, master.sizebytes);
324 avio_seek(pb, pos, SEEK_SET);
327 static int start_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
328 ebml_master *master, unsigned int elementid, uint64_t expectedsize)
332 if ((ret = avio_open_dyn_buf(dyn_cp)) < 0)
336 *master = start_ebml_master(pb, elementid, expectedsize);
337 if (mkv->write_crc && mkv->mode != MODE_WEBM)
338 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
340 *master = start_ebml_master(*dyn_cp, elementid, expectedsize);
345 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
348 uint8_t *buf, crc[4];
352 size = avio_close_dyn_buf(*dyn_cp, &buf);
353 if (mkv->write_crc && mkv->mode != MODE_WEBM) {
354 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
355 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
356 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
358 avio_write(pb, buf + skip, size - skip);
359 end_ebml_master(pb, master);
361 end_ebml_master(*dyn_cp, master);
362 size = avio_close_dyn_buf(*dyn_cp, &buf);
363 avio_write(pb, buf, size);
369 static void put_xiph_size(AVIOContext *pb, int size)
371 ffio_fill(pb, 255, size / 255);
372 avio_w8(pb, size % 255);
376 * Free the members allocated in the mux context.
378 static void mkv_free(MatroskaMuxContext *mkv) {
379 if (mkv->main_seekhead) {
380 av_freep(&mkv->main_seekhead->entries);
381 av_freep(&mkv->main_seekhead);
384 av_freep(&mkv->cues->entries);
385 av_freep(&mkv->cues);
387 if (mkv->attachments) {
388 av_freep(&mkv->attachments->entries);
389 av_freep(&mkv->attachments);
391 av_freep(&mkv->tracks);
392 av_freep(&mkv->stream_durations);
393 av_freep(&mkv->stream_duration_offsets);
397 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
398 * elements. If a maximum number of elements is specified, enough space
399 * will be reserved at the current file location to write a seek head of
402 * @param segment_offset The absolute offset to the position in the file
403 * where the segment begins.
404 * @param numelements The maximum number of elements that will be indexed
405 * by this seek head, 0 if unlimited.
407 static mkv_seekhead *mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset,
410 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
414 new_seekhead->segment_offset = segment_offset;
416 if (numelements > 0) {
417 new_seekhead->filepos = avio_tell(pb);
418 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
419 // and size, 6 bytes for a CRC32 element, and 3 bytes to guarantee
420 // that an EBML void element will fit afterwards
421 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 19;
422 new_seekhead->max_entries = numelements;
423 put_ebml_void(pb, new_seekhead->reserved_size);
428 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
430 mkv_seekhead_entry *entries = seekhead->entries;
432 // don't store more elements than we reserved space for
433 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
436 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
438 return AVERROR(ENOMEM);
439 seekhead->entries = entries;
441 seekhead->entries[seekhead->num_entries].elementid = elementid;
442 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
448 * Write the seek head to the file and free it. If a maximum number of
449 * elements was specified to mkv_start_seekhead(), the seek head will
450 * be written at the location reserved for it. Otherwise, it is written
451 * at the current location in the file.
453 * @return The file offset where the seekhead was written,
454 * -1 if an error occurred.
456 static int64_t mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv)
459 mkv_seekhead *seekhead = mkv->main_seekhead;
460 ebml_master metaseek, seekentry;
464 currentpos = avio_tell(pb);
466 if (seekhead->reserved_size > 0) {
467 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
473 if (start_ebml_master_crc32(pb, &dyn_cp, mkv, &metaseek, MATROSKA_ID_SEEKHEAD,
474 seekhead->reserved_size) < 0) {
479 for (i = 0; i < seekhead->num_entries; i++) {
480 mkv_seekhead_entry *entry = &seekhead->entries[i];
482 seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
484 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
485 put_ebml_num(dyn_cp, ebml_id_size(entry->elementid), 0);
486 put_ebml_id(dyn_cp, entry->elementid);
488 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
489 end_ebml_master(dyn_cp, seekentry);
491 end_ebml_master_crc32(pb, &dyn_cp, mkv, metaseek);
493 if (seekhead->reserved_size > 0) {
494 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
495 put_ebml_void(pb, remaining);
496 avio_seek(pb, currentpos, SEEK_SET);
498 currentpos = seekhead->filepos;
501 av_freep(&mkv->main_seekhead->entries);
502 av_freep(&mkv->main_seekhead);
507 static mkv_cues *mkv_start_cues(int64_t segment_offset)
509 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
513 cues->segment_offset = segment_offset;
517 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
518 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
520 mkv_cuepoint *entries = cues->entries;
525 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
527 return AVERROR(ENOMEM);
528 cues->entries = entries;
530 cues->entries[cues->num_entries].pts = ts;
531 cues->entries[cues->num_entries].stream_idx = stream;
532 cues->entries[cues->num_entries].tracknum = tracknum;
533 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
534 cues->entries[cues->num_entries].relative_pos = relative_pos;
535 cues->entries[cues->num_entries++].duration = duration;
540 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
542 MatroskaMuxContext *mkv = s->priv_data;
543 AVIOContext *dyn_cp, *pb = s->pb;
544 ebml_master cues_element;
548 currentpos = avio_tell(pb);
549 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, &cues_element, MATROSKA_ID_CUES, 0);
553 for (i = 0; i < cues->num_entries; i++) {
554 ebml_master cuepoint, track_positions;
555 mkv_cuepoint *entry = &cues->entries[i];
556 uint64_t pts = entry->pts;
559 // Calculate the number of entries, so we know the element size
560 for (j = 0; j < num_tracks; j++)
561 tracks[j].has_cue = 0;
562 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
563 int tracknum = entry[j].stream_idx;
564 av_assert0(tracknum>=0 && tracknum<num_tracks);
565 if (tracks[tracknum].has_cue && s->streams[tracknum]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
567 tracks[tracknum].has_cue = 1;
571 cuepoint = start_ebml_master(dyn_cp, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(ctp_nb));
572 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETIME, pts);
574 // put all the entries from different tracks that have the exact same
575 // timestamp into the same CuePoint
576 for (j = 0; j < num_tracks; j++)
577 tracks[j].has_cue = 0;
578 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
579 int tracknum = entry[j].stream_idx;
580 av_assert0(tracknum>=0 && tracknum<num_tracks);
581 if (tracks[tracknum].has_cue && s->streams[tracknum]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
583 tracks[tracknum].has_cue = 1;
584 track_positions = start_ebml_master(dyn_cp, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
585 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETRACK , entry[j].tracknum );
586 put_ebml_uint(dyn_cp, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
587 put_ebml_uint(dyn_cp, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
588 if (entry[j].duration != -1)
589 put_ebml_uint(dyn_cp, MATROSKA_ID_CUEDURATION , entry[j].duration);
590 end_ebml_master(dyn_cp, track_positions);
593 end_ebml_master(dyn_cp, cuepoint);
595 end_ebml_master_crc32(pb, &dyn_cp, mkv, cues_element);
600 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
602 const uint8_t *header_start[3];
604 int first_header_size;
607 if (par->codec_id == AV_CODEC_ID_VORBIS)
608 first_header_size = 30;
610 first_header_size = 42;
612 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
613 first_header_size, header_start, header_len) < 0) {
614 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
618 avio_w8(pb, 2); // number packets - 1
619 for (j = 0; j < 2; j++) {
620 put_xiph_size(pb, header_len[j]);
622 for (j = 0; j < 3; j++)
623 avio_write(pb, header_start[j], header_len[j]);
628 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
630 if (par->extradata && par->extradata_size == 2)
631 avio_write(pb, par->extradata, 2);
633 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
637 static int put_flac_codecpriv(AVFormatContext *s,
638 AVIOContext *pb, AVCodecParameters *par)
640 int write_comment = (par->channel_layout &&
641 !(par->channel_layout & ~0x3ffffULL) &&
642 !ff_flac_is_native_layout(par->channel_layout));
643 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
650 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
651 "Lavf" : LIBAVFORMAT_IDENT;
652 AVDictionary *dict = NULL;
653 uint8_t buf[32], *data, *p;
656 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
657 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
659 len = ff_vorbiscomment_length(dict, vendor);
660 if (len >= ((1<<24) - 4))
661 return AVERROR(EINVAL);
663 data = av_malloc(len + 4);
666 return AVERROR(ENOMEM);
670 AV_WB24(data + 1, len);
673 ff_vorbiscomment_write(&p, &dict, vendor);
675 avio_write(pb, data, len + 4);
684 static int get_aac_sample_rates(AVFormatContext *s, AVCodecParameters *par,
685 int *sample_rate, int *output_sample_rate)
687 MPEG4AudioConfig mp4ac;
689 if (avpriv_mpeg4audio_get_config(&mp4ac, par->extradata,
690 par->extradata_size * 8, 1) < 0) {
691 av_log(s, AV_LOG_ERROR,
692 "Error parsing AAC extradata, unable to determine samplerate.\n");
693 return AVERROR(EINVAL);
696 *sample_rate = mp4ac.sample_rate;
697 *output_sample_rate = mp4ac.ext_sample_rate;
701 static int mkv_write_native_codecprivate(AVFormatContext *s,
702 AVCodecParameters *par,
705 switch (par->codec_id) {
706 case AV_CODEC_ID_VORBIS:
707 case AV_CODEC_ID_THEORA:
708 return put_xiph_codecpriv(s, dyn_cp, par);
709 case AV_CODEC_ID_FLAC:
710 return put_flac_codecpriv(s, dyn_cp, par);
711 case AV_CODEC_ID_WAVPACK:
712 return put_wv_codecpriv(dyn_cp, par);
713 case AV_CODEC_ID_H264:
714 return ff_isom_write_avcc(dyn_cp, par->extradata,
715 par->extradata_size);
716 case AV_CODEC_ID_HEVC:
717 ff_isom_write_hvcc(dyn_cp, par->extradata,
718 par->extradata_size, 0);
720 case AV_CODEC_ID_ALAC:
721 if (par->extradata_size < 36) {
722 av_log(s, AV_LOG_ERROR,
723 "Invalid extradata found, ALAC expects a 36-byte "
725 return AVERROR_INVALIDDATA;
727 avio_write(dyn_cp, par->extradata + 12,
728 par->extradata_size - 12);
731 if (par->codec_id == AV_CODEC_ID_PRORES &&
732 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
733 avio_wl32(dyn_cp, par->codec_tag);
734 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
735 avio_write(dyn_cp, par->extradata, par->extradata_size);
741 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
742 AVCodecParameters *par,
743 int native_id, int qt_id)
747 int ret, codecpriv_size;
749 ret = avio_open_dyn_buf(&dyn_cp);
754 ret = mkv_write_native_codecprivate(s, par, dyn_cp);
755 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
758 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
760 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
761 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
764 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
765 avio_wl32(dyn_cp, par->codec_tag);
766 for(i = 0; i < 0x5a - 8; i++)
769 avio_write(dyn_cp, par->extradata, par->extradata_size);
771 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
772 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
773 avcodec_get_name(par->codec_id));
776 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
778 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
779 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
780 avcodec_get_name(par->codec_id));
781 ret = AVERROR(EINVAL);
784 ff_put_bmp_header(dyn_cp, par, ff_codec_bmp_tags, 0, 0);
786 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
788 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
790 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
791 avcodec_get_name(par->codec_id));
792 ret = AVERROR(EINVAL);
795 par->codec_tag = tag;
797 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
800 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
802 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
808 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
810 uint8_t *colorinfo_ptr;
811 int side_data_size = 0;
812 int ret, colorinfo_size;
813 const uint8_t *side_data = av_stream_get_side_data(
814 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA, &side_data_size);
816 ret = avio_open_dyn_buf(&dyn_cp);
820 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
821 par->color_trc < AVCOL_TRC_NB) {
822 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
825 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
826 par->color_space < AVCOL_SPC_NB) {
827 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
829 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
830 par->color_primaries < AVCOL_PRI_NB) {
831 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
833 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
834 par->color_range < AVCOL_RANGE_NB) {
835 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
837 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
838 par->chroma_location <= AVCHROMA_LOC_TOP) {
841 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
842 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
843 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
845 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
846 ebml_master meta_element = start_ebml_master(
847 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
848 const AVMasteringDisplayMetadata *metadata =
849 (const AVMasteringDisplayMetadata*)side_data;
850 if (metadata->has_primaries) {
851 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
852 av_q2d(metadata->display_primaries[0][0]));
853 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
854 av_q2d(metadata->display_primaries[0][1]));
855 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
856 av_q2d(metadata->display_primaries[1][0]));
857 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
858 av_q2d(metadata->display_primaries[1][1]));
859 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
860 av_q2d(metadata->display_primaries[2][0]));
861 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
862 av_q2d(metadata->display_primaries[2][1]));
863 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
864 av_q2d(metadata->white_point[0]));
865 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
866 av_q2d(metadata->white_point[1]));
868 if (metadata->has_luminance) {
869 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
870 av_q2d(metadata->max_luminance));
871 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
872 av_q2d(metadata->min_luminance));
874 end_ebml_master(dyn_cp, meta_element);
877 colorinfo_size = avio_close_dyn_buf(dyn_cp, &colorinfo_ptr);
878 if (colorinfo_size) {
879 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, 0);
880 avio_write(pb, colorinfo_ptr, colorinfo_size);
881 end_ebml_master(pb, colorinfo);
883 av_free(colorinfo_ptr);
887 static void mkv_write_field_order(AVIOContext *pb, int mode,
888 enum AVFieldOrder field_order)
890 switch (field_order) {
891 case AV_FIELD_UNKNOWN:
893 case AV_FIELD_PROGRESSIVE:
894 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
895 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
901 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
902 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
903 if (mode != MODE_WEBM) {
904 switch (field_order) {
906 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
907 MATROSKA_VIDEO_FIELDORDER_TT);
910 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
911 MATROSKA_VIDEO_FIELDORDER_BB);
914 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
915 MATROSKA_VIDEO_FIELDORDER_TB);
918 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
919 MATROSKA_VIDEO_FIELDORDER_BT);
926 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
927 AVStream *st, int mode, int *h_width, int *h_height)
931 AVDictionaryEntry *tag;
932 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
936 // convert metadata into proper side data and add it to the stream
937 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
938 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
939 int stereo_mode = atoi(tag->value);
941 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
942 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
947 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
948 stereo_mode != 10 && stereo_mode != 12) {
949 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
955 // iterate to find the stereo3d side data
956 for (i = 0; i < st->nb_side_data; i++) {
957 AVPacketSideData sd = st->side_data[i];
958 if (sd.type == AV_PKT_DATA_STEREO3D) {
959 AVStereo3D *stereo = (AVStereo3D *)sd.data;
961 switch (stereo->type) {
963 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
965 case AV_STEREO3D_SIDEBYSIDE:
966 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
967 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
968 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
971 case AV_STEREO3D_TOPBOTTOM:
972 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
973 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
977 case AV_STEREO3D_CHECKERBOARD:
978 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
979 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
982 case AV_STEREO3D_LINES:
983 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
984 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
988 case AV_STEREO3D_COLUMNS:
989 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
990 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
994 case AV_STEREO3D_FRAMESEQUENCE:
995 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
996 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1004 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1007 // if webm, do not write unsupported modes
1008 if ((mode == MODE_WEBM &&
1009 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1010 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1011 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1012 av_log(s, AV_LOG_ERROR,
1013 "The specified stereo mode is not valid.\n");
1014 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1015 return AVERROR(EINVAL);
1018 // write StereoMode if format is valid
1019 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1024 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1025 int i, AVIOContext *pb, int default_stream_exists)
1027 AVStream *st = s->streams[i];
1028 AVCodecParameters *par = st->codecpar;
1029 ebml_master subinfo, track;
1032 int bit_depth = av_get_bits_per_sample(par->codec_id);
1033 int sample_rate = par->sample_rate;
1034 int output_sample_rate = 0;
1035 int display_width_div = 1;
1036 int display_height_div = 1;
1038 AVDictionaryEntry *tag;
1040 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1041 mkv->have_attachments = 1;
1045 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
1046 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1047 if (par->bits_per_raw_sample)
1048 bit_depth = par->bits_per_raw_sample;
1050 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1053 bit_depth = par->bits_per_coded_sample;
1056 if (par->codec_id == AV_CODEC_ID_AAC) {
1057 ret = get_aac_sample_rates(s, par, &sample_rate, &output_sample_rate);
1062 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1063 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
1064 mkv->is_dash ? mkv->dash_track_number : i + 1);
1065 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
1066 mkv->is_dash ? mkv->dash_track_number : i + 1);
1067 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1069 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1070 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1071 tag = av_dict_get(st->metadata, "language", NULL, 0);
1072 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1073 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
1074 } else if (tag && tag->value) {
1075 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
1078 // The default value for TRACKFLAGDEFAULT is 1, so add element
1079 // if we need to clear it.
1080 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1081 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1083 if (st->disposition & AV_DISPOSITION_FORCED)
1084 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1086 if (mkv->mode == MODE_WEBM && par->codec_id == AV_CODEC_ID_WEBVTT) {
1087 const char *codec_id;
1088 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1089 codec_id = "D_WEBVTT/CAPTIONS";
1090 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1091 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1092 codec_id = "D_WEBVTT/DESCRIPTIONS";
1093 native_id = MATROSKA_TRACK_TYPE_METADATA;
1094 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1095 codec_id = "D_WEBVTT/METADATA";
1096 native_id = MATROSKA_TRACK_TYPE_METADATA;
1098 codec_id = "D_WEBVTT/SUBTITLES";
1099 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1101 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1103 // look for a codec ID string specific to mkv to use,
1104 // if none are found, use AVI codes
1105 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1106 if (ff_mkv_codec_tags[j].id == par->codec_id) {
1107 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1112 if (par->codec_id == AV_CODEC_ID_RAWVIDEO && !par->codec_tag) {
1113 if (mkv->allow_raw_vfw) {
1116 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1117 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1118 return AVERROR(EINVAL);
1123 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1124 int64_t codecdelay = av_rescale_q(par->initial_padding,
1125 (AVRational){ 1, 48000 },
1126 (AVRational){ 1, 1000000000 });
1127 if (codecdelay < 0) {
1128 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1129 return AVERROR(EINVAL);
1131 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1132 // (AVRational){ 1, par->sample_rate },
1135 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1137 if (par->codec_id == AV_CODEC_ID_OPUS) {
1138 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1141 if (mkv->mode == MODE_WEBM && !(par->codec_id == AV_CODEC_ID_VP8 ||
1142 par->codec_id == AV_CODEC_ID_VP9 ||
1143 par->codec_id == AV_CODEC_ID_OPUS ||
1144 par->codec_id == AV_CODEC_ID_VORBIS ||
1145 par->codec_id == AV_CODEC_ID_WEBVTT)) {
1146 av_log(s, AV_LOG_ERROR,
1147 "Only VP8 or VP9 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1148 return AVERROR(EINVAL);
1151 switch (par->codec_type) {
1152 case AVMEDIA_TYPE_VIDEO:
1153 mkv->have_video = 1;
1154 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1156 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1157 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1158 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1160 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->time_base.num / st->time_base.den);
1163 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1164 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1165 par->codec_id == AV_CODEC_ID_SVQ1 ||
1166 par->codec_id == AV_CODEC_ID_SVQ3 ||
1167 par->codec_id == AV_CODEC_ID_CINEPAK))
1171 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1172 else if (!native_id) {
1173 // if there is no mkv-specific codec ID, use VFW mode
1174 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1175 mkv->tracks[i].write_dts = 1;
1176 s->internal->avoid_negative_ts_use_pts = 0;
1179 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1181 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1182 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1184 mkv_write_field_order(pb, mkv->mode, par->field_order);
1186 // check both side data and metadata for stereo information,
1187 // write the result to the bitstream if any is found
1188 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1190 &display_height_div);
1194 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1195 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1196 (par->format == AV_PIX_FMT_YUVA420P)) {
1197 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1200 // write DisplayWidth and DisplayHeight, they contain the size of
1201 // a single source view and/or the display aspect ratio
1202 if (st->sample_aspect_ratio.num) {
1203 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1204 if (d_width > INT_MAX) {
1205 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1206 return AVERROR(EINVAL);
1208 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1209 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1210 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1211 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1213 AVRational display_aspect_ratio;
1214 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1215 par->width * (int64_t)st->sample_aspect_ratio.num,
1216 par->height * (int64_t)st->sample_aspect_ratio.den,
1218 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1219 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1220 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1223 } else if (display_width_div != 1 || display_height_div != 1) {
1224 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1225 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1227 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1229 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1230 uint32_t color_space = av_le2ne32(par->codec_tag);
1231 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1233 if (s->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
1234 ret = mkv_write_video_color(pb, par, st);
1238 end_ebml_master(pb, subinfo);
1241 case AVMEDIA_TYPE_AUDIO:
1242 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1245 // no mkv-specific ID, use ACM mode
1246 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1248 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1249 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1250 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1251 if (output_sample_rate)
1252 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1254 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1255 end_ebml_master(pb, subinfo);
1258 case AVMEDIA_TYPE_SUBTITLE:
1260 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1261 return AVERROR(ENOSYS);
1264 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1265 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1267 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1270 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1271 return AVERROR(EINVAL);
1274 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1275 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1280 end_ebml_master(pb, track);
1285 static int mkv_write_tracks(AVFormatContext *s)
1287 MatroskaMuxContext *mkv = s->priv_data;
1288 AVIOContext *pb = s->pb;
1289 int i, ret, default_stream_exists = 0;
1291 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
1295 ret = start_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, &mkv->tracks_master, MATROSKA_ID_TRACKS, 0);
1299 for (i = 0; i < s->nb_streams; i++) {
1300 AVStream *st = s->streams[i];
1301 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1303 for (i = 0; i < s->nb_streams; i++) {
1304 ret = mkv_write_track(s, mkv, i, mkv->tracks_bc, default_stream_exists);
1309 if (pb->seekable && !mkv->is_live)
1310 put_ebml_void(pb, avio_tell(mkv->tracks_bc));
1312 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, mkv->tracks_master);
1317 static int mkv_write_chapters(AVFormatContext *s)
1319 MatroskaMuxContext *mkv = s->priv_data;
1320 AVIOContext *dyn_cp, *pb = s->pb;
1321 ebml_master chapters, editionentry;
1322 AVRational scale = {1, 1E9};
1325 if (!s->nb_chapters || mkv->wrote_chapters)
1328 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1329 if (ret < 0) return ret;
1331 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, &chapters, MATROSKA_ID_CHAPTERS, 0);
1332 if (ret < 0) return ret;
1334 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1335 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1336 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1337 for (i = 0; i < s->nb_chapters; i++) {
1338 ebml_master chapteratom, chapterdisplay;
1339 AVChapter *c = s->chapters[i];
1340 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1341 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1342 AVDictionaryEntry *t = NULL;
1343 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1344 av_log(s, AV_LOG_ERROR,
1345 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1346 chapterstart, chapterend);
1347 return AVERROR_INVALIDDATA;
1350 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1351 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1352 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1353 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1354 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1355 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1356 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1357 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1358 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1359 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1360 end_ebml_master(dyn_cp, chapterdisplay);
1362 end_ebml_master(dyn_cp, chapteratom);
1364 end_ebml_master(dyn_cp, editionentry);
1365 end_ebml_master_crc32(pb, &dyn_cp, mkv, chapters);
1367 mkv->wrote_chapters = 1;
1371 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1373 uint8_t *key = av_strdup(t->key);
1375 const uint8_t *lang = NULL;
1379 return AVERROR(ENOMEM);
1381 if ((p = strrchr(p, '-')) &&
1382 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1389 else if (*p >= 'a' && *p <= 'z')
1394 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1395 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1397 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1398 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1399 end_ebml_master(pb, tag);
1405 static int mkv_write_tag_targets(AVFormatContext *s,
1406 unsigned int elementid, unsigned int uid,
1407 ebml_master *tags, ebml_master* tag)
1410 MatroskaMuxContext *mkv = s->priv_data;
1411 ebml_master targets;
1415 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1416 if (ret < 0) return ret;
1418 start_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, tags, MATROSKA_ID_TAGS, 0);
1422 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1423 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1425 put_ebml_uint(pb, elementid, uid);
1426 end_ebml_master(pb, targets);
1430 static int mkv_check_tag_name(const char *name, unsigned int elementid)
1432 return av_strcasecmp(name, "title") &&
1433 av_strcasecmp(name, "stereo_mode") &&
1434 av_strcasecmp(name, "creation_time") &&
1435 av_strcasecmp(name, "encoding_tool") &&
1436 av_strcasecmp(name, "duration") &&
1437 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1438 av_strcasecmp(name, "language")) &&
1439 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1440 (av_strcasecmp(name, "filename") &&
1441 av_strcasecmp(name, "mimetype")));
1444 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
1445 unsigned int uid, ebml_master *tags)
1447 MatroskaMuxContext *mkv = s->priv_data;
1450 AVDictionaryEntry *t = NULL;
1452 ret = mkv_write_tag_targets(s, elementid, uid, tags, &tag);
1456 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1457 if (mkv_check_tag_name(t->key, elementid)) {
1458 ret = mkv_write_simpletag(mkv->tags_bc, t);
1464 end_ebml_master(mkv->tags_bc, tag);
1468 static int mkv_check_tag(AVDictionary *m, unsigned int elementid)
1470 AVDictionaryEntry *t = NULL;
1472 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1473 if (mkv_check_tag_name(t->key, elementid))
1479 static int mkv_write_tags(AVFormatContext *s)
1481 MatroskaMuxContext *mkv = s->priv_data;
1484 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1486 if (mkv_check_tag(s->metadata, 0)) {
1487 ret = mkv_write_tag(s, s->metadata, 0, 0, &mkv->tags);
1488 if (ret < 0) return ret;
1491 for (i = 0; i < s->nb_streams; i++) {
1492 AVStream *st = s->streams[i];
1494 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1497 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1500 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &mkv->tags);
1501 if (ret < 0) return ret;
1504 if (s->pb->seekable && !mkv->is_live) {
1505 for (i = 0; i < s->nb_streams; i++) {
1507 AVStream *st = s->streams[i];
1508 ebml_master tag_target;
1511 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1514 mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &mkv->tags, &tag_target);
1517 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1518 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1519 mkv->stream_duration_offsets[i] = avio_tell(pb);
1521 // Reserve space to write duration as a 20-byte string.
1522 // 2 (ebml id) + 1 (data size) + 20 (data)
1523 put_ebml_void(pb, 23);
1524 end_ebml_master(pb, tag);
1525 end_ebml_master(pb, tag_target);
1529 for (i = 0; i < s->nb_chapters; i++) {
1530 AVChapter *ch = s->chapters[i];
1532 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1535 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &mkv->tags);
1536 if (ret < 0) return ret;
1539 if (mkv->have_attachments) {
1540 for (i = 0; i < mkv->attachments->num_entries; i++) {
1541 mkv_attachment *attachment = &mkv->attachments->entries[i];
1542 AVStream *st = s->streams[attachment->stream_idx];
1544 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1547 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID, attachment->fileuid, &mkv->tags);
1553 if (mkv->tags.pos) {
1554 if (s->pb->seekable && !mkv->is_live)
1555 put_ebml_void(s->pb, avio_tell(mkv->tags_bc));
1557 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, mkv->tags);
1562 static int mkv_write_attachments(AVFormatContext *s)
1564 MatroskaMuxContext *mkv = s->priv_data;
1565 AVIOContext *dyn_cp, *pb = s->pb;
1566 ebml_master attachments;
1570 if (!mkv->have_attachments)
1573 mkv->attachments = av_mallocz(sizeof(*mkv->attachments));
1574 if (!mkv->attachments)
1575 return AVERROR(ENOMEM);
1577 av_lfg_init(&c, av_get_random_seed());
1579 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1580 if (ret < 0) return ret;
1582 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, &attachments, MATROSKA_ID_ATTACHMENTS, 0);
1583 if (ret < 0) return ret;
1585 for (i = 0; i < s->nb_streams; i++) {
1586 AVStream *st = s->streams[i];
1587 ebml_master attached_file;
1588 mkv_attachment *attachment = mkv->attachments->entries;
1589 AVDictionaryEntry *t;
1590 const char *mimetype = NULL;
1593 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1596 attachment = av_realloc_array(attachment, mkv->attachments->num_entries + 1, sizeof(mkv_attachment));
1598 return AVERROR(ENOMEM);
1599 mkv->attachments->entries = attachment;
1601 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1603 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1604 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1605 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1606 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1607 return AVERROR(EINVAL);
1609 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1610 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1611 mimetype = t->value;
1612 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1614 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1615 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1616 mimetype = ff_mkv_mime_tags[i].str;
1619 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1620 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1621 mimetype = ff_mkv_image_mime_tags[i].str;
1626 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1627 "it cannot be deduced from the codec id.\n", i);
1628 return AVERROR(EINVAL);
1631 if (s->flags & AVFMT_FLAG_BITEXACT) {
1632 struct AVSHA *sha = av_sha_alloc();
1635 return AVERROR(ENOMEM);
1636 av_sha_init(sha, 160);
1637 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1638 av_sha_final(sha, digest);
1640 fileuid = AV_RL32(digest);
1642 fileuid = av_lfg_get(&c);
1644 av_log(s, AV_LOG_VERBOSE, "Using %.8"PRIx32" for attachment %d\n",
1645 fileuid, mkv->attachments->num_entries);
1647 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1648 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1649 put_ebml_uint(dyn_cp, MATROSKA_ID_FILEUID, fileuid);
1650 end_ebml_master(dyn_cp, attached_file);
1652 mkv->attachments->entries[mkv->attachments->num_entries].stream_idx = i;
1653 mkv->attachments->entries[mkv->attachments->num_entries++].fileuid = fileuid;
1655 end_ebml_master_crc32(pb, &dyn_cp, mkv, attachments);
1660 static int64_t get_metadata_duration(AVFormatContext *s)
1666 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1667 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1668 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1672 for (i = 0; i < s->nb_streams; i++) {
1674 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1676 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1677 max = FFMAX(max, us);
1680 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1684 static int mkv_write_header(AVFormatContext *s)
1686 MatroskaMuxContext *mkv = s->priv_data;
1687 AVIOContext *pb = s->pb;
1688 ebml_master ebml_header;
1689 AVDictionaryEntry *tag;
1690 int ret, i, version = 2;
1691 int64_t creation_time;
1693 if (!strcmp(s->oformat->name, "webm"))
1694 mkv->mode = MODE_WEBM;
1696 mkv->mode = MODE_MATROSKAv2;
1698 if (mkv->mode != MODE_WEBM ||
1699 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1700 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1703 for (i = 0; i < s->nb_streams; i++) {
1704 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
1705 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
1706 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
1707 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
1708 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
1709 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
1710 av_log(s, AV_LOG_ERROR,
1711 "The Matroska muxer does not yet support muxing %s\n",
1712 avcodec_get_name(s->streams[i]->codecpar->codec_id));
1713 return AVERROR_PATCHWELCOME;
1715 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1716 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1717 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1721 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1723 ret = AVERROR(ENOMEM);
1726 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1727 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1728 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1729 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1730 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1731 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1732 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1733 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1734 end_ebml_master(pb, ebml_header);
1736 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1737 mkv->segment_offset = avio_tell(pb);
1739 // we write 2 seek heads - one at the end of the file to point to each
1740 // cluster, and one at the beginning to point to all other level one
1741 // elements (including the seek head at the end of the file), which
1742 // isn't more than 10 elements if we only write one of each other
1743 // currently defined level 1 element
1744 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1745 if (!mkv->main_seekhead) {
1746 ret = AVERROR(ENOMEM);
1750 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1751 if (ret < 0) goto fail;
1753 ret = start_ebml_master_crc32(pb, &mkv->info_bc, mkv, &mkv->info, MATROSKA_ID_INFO, 0);
1758 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1759 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1760 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1761 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1762 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1763 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1764 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1766 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1768 if (mkv->mode != MODE_WEBM) {
1769 uint32_t segment_uid[4];
1772 av_lfg_init(&lfg, av_get_random_seed());
1774 for (i = 0; i < 4; i++)
1775 segment_uid[i] = av_lfg_get(&lfg);
1777 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1780 const char *ident = "Lavf";
1781 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1782 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1785 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1786 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1787 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1788 uint8_t date_utc_buf[8];
1789 AV_WB64(date_utc_buf, date_utc);
1790 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1793 // reserve space for the duration
1795 mkv->duration_offset = avio_tell(pb);
1796 if (!mkv->is_live) {
1797 int64_t metadata_duration = get_metadata_duration(s);
1799 if (s->duration > 0) {
1800 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1801 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1802 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1803 } else if (metadata_duration > 0) {
1804 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1805 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1806 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1808 put_ebml_void(pb, 11); // assumes double-precision float to be written
1811 if (s->pb->seekable && !mkv->is_live)
1812 put_ebml_void(s->pb, avio_tell(pb));
1814 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv, mkv->info);
1817 // initialize stream_duration fields
1818 mkv->stream_durations = av_mallocz(s->nb_streams * sizeof(int64_t));
1819 mkv->stream_duration_offsets = av_mallocz(s->nb_streams * sizeof(int64_t));
1821 ret = mkv_write_tracks(s);
1825 for (i = 0; i < s->nb_chapters; i++)
1826 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1828 if (mkv->mode != MODE_WEBM) {
1829 ret = mkv_write_chapters(s);
1833 ret = mkv_write_attachments(s);
1837 ret = mkv_write_tags(s);
1842 if (!s->pb->seekable && !mkv->is_live)
1843 mkv_write_seekhead(pb, mkv);
1845 mkv->cues = mkv_start_cues(mkv->segment_offset);
1847 ret = AVERROR(ENOMEM);
1850 if (pb->seekable && mkv->reserve_cues_space) {
1851 mkv->cues_pos = avio_tell(pb);
1852 put_ebml_void(pb, mkv->reserve_cues_space);
1855 av_init_packet(&mkv->cur_audio_pkt);
1856 mkv->cur_audio_pkt.size = 0;
1857 mkv->cluster_pos = -1;
1861 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1862 // after 4k and on a keyframe
1864 if (mkv->cluster_time_limit < 0)
1865 mkv->cluster_time_limit = 5000;
1866 if (mkv->cluster_size_limit < 0)
1867 mkv->cluster_size_limit = 5 * 1024 * 1024;
1869 if (mkv->cluster_time_limit < 0)
1870 mkv->cluster_time_limit = 1000;
1871 if (mkv->cluster_size_limit < 0)
1872 mkv->cluster_size_limit = 32 * 1024;
1881 static int mkv_blockgroup_size(int pkt_size)
1883 int size = pkt_size + 4;
1884 size += ebml_num_size(size);
1885 size += 2; // EBML ID for block and block duration
1886 size += 8; // max size of block duration
1887 size += ebml_num_size(size);
1888 size += 1; // blockgroup EBML ID
1892 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1899 dst = av_malloc(srclen);
1901 return AVERROR(ENOMEM);
1903 while (srclen >= WV_HEADER_SIZE) {
1906 ret = ff_wv_parse_header(&header, src);
1909 src += WV_HEADER_SIZE;
1910 srclen -= WV_HEADER_SIZE;
1912 if (srclen < header.blocksize) {
1913 ret = AVERROR_INVALIDDATA;
1917 if (header.initial) {
1918 AV_WL32(dst + offset, header.samples);
1921 AV_WL32(dst + offset, header.flags);
1922 AV_WL32(dst + offset + 4, header.crc);
1925 if (!(header.initial && header.final)) {
1926 AV_WL32(dst + offset, header.blocksize);
1930 memcpy(dst + offset, src, header.blocksize);
1931 src += header.blocksize;
1932 srclen -= header.blocksize;
1933 offset += header.blocksize;
1945 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1946 unsigned int blockid, AVPacket *pkt, int keyframe)
1948 MatroskaMuxContext *mkv = s->priv_data;
1949 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1950 uint8_t *data = NULL, *side_data = NULL;
1951 int offset = 0, size = pkt->size, side_data_size = 0;
1952 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1953 uint64_t additional_id = 0;
1954 int64_t discard_padding = 0;
1955 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
1956 ebml_master block_group, block_additions, block_more;
1958 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1959 "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", keyframe %d\n",
1960 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration,
1962 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
1963 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
1964 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1965 else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
1966 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
1967 /* extradata is Annex B, assume the bitstream is too and convert it */
1968 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1969 else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
1970 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
1972 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
1978 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
1979 /* Matroska specification requires to remove the first QuickTime atom
1985 side_data = av_packet_get_side_data(pkt,
1986 AV_PKT_DATA_SKIP_SAMPLES,
1989 if (side_data && side_data_size >= 10) {
1990 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
1991 (AVRational){1, par->sample_rate},
1992 (AVRational){1, 1000000000});
1995 side_data = av_packet_get_side_data(pkt,
1996 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
1999 additional_id = AV_RB64(side_data);
2001 side_data_size -= 8;
2004 if ((side_data_size && additional_id == 1) || discard_padding) {
2005 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2006 blockid = MATROSKA_ID_BLOCK;
2009 put_ebml_id(pb, blockid);
2010 put_ebml_num(pb, size + 4, 0);
2011 // this assumes stream_index is less than 126
2012 avio_w8(pb, 0x80 | track_number);
2013 avio_wb16(pb, ts - mkv->cluster_pts);
2014 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2015 avio_write(pb, data + offset, size);
2016 if (data != pkt->data)
2019 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2020 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE,
2021 mkv->last_track_timestamp[track_number - 1]);
2023 mkv->last_track_timestamp[track_number - 1] = ts - mkv->cluster_pts;
2025 if (discard_padding) {
2026 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2029 if (side_data_size && additional_id == 1) {
2030 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2031 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2032 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
2033 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
2034 put_ebml_num(pb, side_data_size, 0);
2035 avio_write(pb, side_data, side_data_size);
2036 end_ebml_master(pb, block_more);
2037 end_ebml_master(pb, block_additions);
2039 if ((side_data_size && additional_id == 1) || discard_padding) {
2040 end_ebml_master(pb, block_group);
2044 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2046 MatroskaMuxContext *mkv = s->priv_data;
2047 ebml_master blockgroup;
2048 int id_size, settings_size, size;
2049 uint8_t *id, *settings;
2050 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2051 const int flags = 0;
2054 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2058 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2061 size = id_size + 1 + settings_size + 1 + pkt->size;
2063 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
2064 "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", flags %d\n",
2065 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
2067 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2069 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2070 put_ebml_num(pb, size + 4, 0);
2071 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
2072 avio_wb16(pb, ts - mkv->cluster_pts);
2074 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2076 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2077 end_ebml_master(pb, blockgroup);
2079 return pkt->duration;
2082 static void mkv_start_new_cluster(AVFormatContext *s, AVPacket *pkt)
2084 MatroskaMuxContext *mkv = s->priv_data;
2086 end_ebml_master_crc32(s->pb, &mkv->dyn_bc, mkv, mkv->cluster);
2087 mkv->cluster_pos = -1;
2088 if (s->pb->seekable)
2089 av_log(s, AV_LOG_DEBUG,
2090 "Starting new cluster at offset %" PRIu64 " bytes, "
2091 "pts %" PRIu64 "dts %" PRIu64 "\n",
2092 avio_tell(s->pb), pkt->pts, pkt->dts);
2094 av_log(s, AV_LOG_DEBUG, "Starting new cluster, "
2095 "pts %" PRIu64 "dts %" PRIu64 "\n",
2096 pkt->pts, pkt->dts);
2100 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2102 MatroskaMuxContext *mkv = s->priv_data;
2103 AVIOContext *pb = s->pb;
2104 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2105 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2106 int duration = pkt->duration;
2108 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2109 int64_t relative_packet_pos;
2110 int dash_tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
2112 if (ts == AV_NOPTS_VALUE) {
2113 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2114 return AVERROR(EINVAL);
2116 ts += mkv->tracks[pkt->stream_index].ts_offset;
2118 if (mkv->cluster_pos != -1) {
2119 int64_t cluster_time = ts - mkv->cluster_pts + mkv->tracks[pkt->stream_index].ts_offset;
2120 if ((int16_t)cluster_time != cluster_time) {
2121 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2122 mkv_start_new_cluster(s, pkt);
2126 if (mkv->cluster_pos == -1) {
2127 mkv->cluster_pos = avio_tell(s->pb);
2128 ret = start_ebml_master_crc32(s->pb, &mkv->dyn_bc, mkv, &mkv->cluster, MATROSKA_ID_CLUSTER, 0);
2131 put_ebml_uint(mkv->dyn_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2132 mkv->cluster_pts = FFMAX(0, ts);
2136 relative_packet_pos = avio_tell(pb);
2138 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2139 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2140 if (s->pb->seekable && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2141 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
2142 if (ret < 0) return ret;
2145 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2146 duration = mkv_write_vtt_blocks(s, pb, pkt);
2148 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2149 mkv_blockgroup_size(pkt->size));
2151 #if FF_API_CONVERGENCE_DURATION
2152 FF_DISABLE_DEPRECATION_WARNINGS
2153 /* For backward compatibility, prefer convergence_duration. */
2154 if (pkt->convergence_duration > 0) {
2155 duration = pkt->convergence_duration;
2157 FF_ENABLE_DEPRECATION_WARNINGS
2159 /* All subtitle blocks are considered to be keyframes. */
2160 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2161 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2162 end_ebml_master(pb, blockgroup);
2165 if (s->pb->seekable) {
2166 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts,
2167 mkv->cluster_pos, relative_packet_pos, duration);
2173 mkv->duration = FFMAX(mkv->duration, ts + duration);
2175 if (mkv->stream_durations)
2176 mkv->stream_durations[pkt->stream_index] =
2177 FFMAX(mkv->stream_durations[pkt->stream_index], ts + duration);
2182 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2184 MatroskaMuxContext *mkv = s->priv_data;
2185 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2186 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2188 int64_t cluster_time;
2190 int start_new_cluster;
2192 if (mkv->tracks[pkt->stream_index].write_dts)
2193 cluster_time = pkt->dts - mkv->cluster_pts;
2195 cluster_time = pkt->pts - mkv->cluster_pts;
2196 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2198 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
2199 // after 4k and on a keyframe
2200 cluster_size = avio_tell(mkv->dyn_bc);
2202 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2203 // WebM DASH specification states that the first block of every cluster
2204 // has to be a key frame. So for DASH video, we only create a cluster
2205 // on seeing key frames.
2206 start_new_cluster = keyframe;
2207 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2208 (mkv->cluster_pos == -1 ||
2209 cluster_time > mkv->cluster_time_limit)) {
2210 // For DASH audio, we create a Cluster based on cluster_time_limit
2211 start_new_cluster = 1;
2212 } else if (!mkv->is_dash &&
2213 (cluster_size > mkv->cluster_size_limit ||
2214 cluster_time > mkv->cluster_time_limit ||
2215 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2216 cluster_size > 4 * 1024))) {
2217 start_new_cluster = 1;
2219 start_new_cluster = 0;
2222 if (mkv->cluster_pos != -1 && start_new_cluster) {
2223 mkv_start_new_cluster(s, pkt);
2226 if (!mkv->cluster_pos)
2227 avio_write_marker(s->pb,
2228 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2229 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2231 // check if we have an audio packet cached
2232 if (mkv->cur_audio_pkt.size > 0) {
2233 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2234 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2235 mkv->is_dash ? start_new_cluster : 0);
2236 av_packet_unref(&mkv->cur_audio_pkt);
2238 av_log(s, AV_LOG_ERROR,
2239 "Could not write cached audio packet ret:%d\n", ret);
2244 // buffer an audio packet to ensure the packet containing the video
2245 // keyframe's timecode is contained in the same cluster for WebM
2246 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2247 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2249 ret = mkv_write_packet_internal(s, pkt, 0);
2253 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2255 MatroskaMuxContext *mkv = s->priv_data;
2258 if (mkv->cluster_pos != -1) {
2259 end_ebml_master_crc32(s->pb, &mkv->dyn_bc, mkv, mkv->cluster);
2260 mkv->cluster_pos = -1;
2261 if (s->pb->seekable)
2262 av_log(s, AV_LOG_DEBUG,
2263 "Flushing cluster at offset %" PRIu64 " bytes\n",
2266 av_log(s, AV_LOG_DEBUG, "Flushing cluster\n");
2271 return mkv_write_packet(s, pkt);
2274 static int mkv_write_trailer(AVFormatContext *s)
2276 MatroskaMuxContext *mkv = s->priv_data;
2277 AVIOContext *pb = s->pb;
2278 int64_t currentpos, cuespos;
2281 // check if we have an audio packet cached
2282 if (mkv->cur_audio_pkt.size > 0) {
2283 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2284 av_packet_unref(&mkv->cur_audio_pkt);
2286 av_log(s, AV_LOG_ERROR,
2287 "Could not write cached audio packet ret:%d\n", ret);
2293 end_ebml_master_crc32(pb, &mkv->dyn_bc, mkv, mkv->cluster);
2296 if (mkv->mode != MODE_WEBM) {
2297 ret = mkv_write_chapters(s);
2302 if (pb->seekable && !mkv->is_live) {
2303 if (mkv->cues->num_entries) {
2304 if (mkv->reserve_cues_space) {
2307 currentpos = avio_tell(pb);
2308 avio_seek(pb, mkv->cues_pos, SEEK_SET);
2310 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2311 cues_end = avio_tell(pb);
2312 if (cues_end > cuespos + mkv->reserve_cues_space) {
2313 av_log(s, AV_LOG_ERROR,
2314 "Insufficient space reserved for cues: %d "
2315 "(needed: %" PRId64 ").\n",
2316 mkv->reserve_cues_space, cues_end - cuespos);
2317 return AVERROR(EINVAL);
2320 if (cues_end < cuespos + mkv->reserve_cues_space)
2321 put_ebml_void(pb, mkv->reserve_cues_space -
2322 (cues_end - cuespos));
2324 avio_seek(pb, currentpos, SEEK_SET);
2326 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2329 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES,
2335 mkv_write_seekhead(pb, mkv);
2337 // update the duration
2338 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2339 currentpos = avio_tell(pb);
2340 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2341 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2342 avio_seek(pb, mkv->info.pos, SEEK_SET);
2343 end_ebml_master_crc32(pb, &mkv->info_bc, mkv, mkv->info);
2345 // write tracks master
2346 avio_seek(pb, mkv->tracks_master.pos, SEEK_SET);
2347 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, mkv->tracks_master);
2349 // update stream durations
2350 if (!mkv->is_live && mkv->stream_durations) {
2352 int64_t curr = avio_tell(mkv->tags_bc);
2353 for (i = 0; i < s->nb_streams; ++i) {
2354 AVStream *st = s->streams[i];
2356 if (mkv->stream_duration_offsets[i] > 0) {
2357 double duration_sec = mkv->stream_durations[i] * av_q2d(st->time_base);
2358 char duration_string[20] = "";
2360 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2361 mkv->stream_durations[i]);
2363 avio_seek(mkv->tags_bc, mkv->stream_duration_offsets[i], SEEK_SET);
2365 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2366 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2367 fmod(duration_sec, 60));
2369 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2372 avio_seek(mkv->tags_bc, curr, SEEK_SET);
2374 if (mkv->tags.pos && !mkv->is_live) {
2375 avio_seek(pb, mkv->tags.pos, SEEK_SET);
2376 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv, mkv->tags);
2379 avio_seek(pb, currentpos, SEEK_SET);
2382 if (!mkv->is_live) {
2383 end_ebml_master(pb, mkv->segment);
2390 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2393 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2394 if (ff_mkv_codec_tags[i].id == codec_id)
2397 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2398 enum AVMediaType type = avcodec_get_type(codec_id);
2399 // mkv theoretically supports any video/audio through VFW/ACM
2400 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2407 static int mkv_init(struct AVFormatContext *s)
2411 if (s->avoid_negative_ts < 0) {
2412 s->avoid_negative_ts = 1;
2413 s->internal->avoid_negative_ts_use_pts = 1;
2416 for (i = 0; i < s->nb_streams; i++) {
2417 // ms precision is the de-facto standard timescale for mkv files
2418 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2424 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2427 AVStream *st = s->streams[pkt->stream_index];
2429 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2430 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2431 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2432 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2433 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2439 static const AVCodecTag additional_audio_tags[] = {
2440 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2441 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
2442 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2443 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2444 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2445 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2446 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2447 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2448 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2449 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2450 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2451 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2452 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2455 static const AVCodecTag additional_video_tags[] = {
2456 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2457 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2458 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2459 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
2460 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
2461 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2464 static const AVCodecTag additional_subtitle_tags[] = {
2465 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2466 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2467 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2470 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2471 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2472 static const AVOption options[] = {
2473 { "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 },
2474 { "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 },
2475 { "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 },
2476 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2477 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2478 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2479 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2480 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2484 #if CONFIG_MATROSKA_MUXER
2485 static const AVClass matroska_class = {
2486 .class_name = "matroska muxer",
2487 .item_name = av_default_item_name,
2489 .version = LIBAVUTIL_VERSION_INT,
2492 AVOutputFormat ff_matroska_muxer = {
2494 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2495 .mime_type = "video/x-matroska",
2496 .extensions = "mkv",
2497 .priv_data_size = sizeof(MatroskaMuxContext),
2498 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2499 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2500 .video_codec = CONFIG_LIBX264_ENCODER ?
2501 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2503 .write_header = mkv_write_header,
2504 .write_packet = mkv_write_flush_packet,
2505 .write_trailer = mkv_write_trailer,
2506 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2507 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2508 .codec_tag = (const AVCodecTag* const []){
2509 ff_codec_bmp_tags, ff_codec_wav_tags,
2510 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2512 .subtitle_codec = AV_CODEC_ID_ASS,
2513 .query_codec = mkv_query_codec,
2514 .check_bitstream = mkv_check_bitstream,
2515 .priv_class = &matroska_class,
2519 #if CONFIG_WEBM_MUXER
2520 static const AVClass webm_class = {
2521 .class_name = "webm muxer",
2522 .item_name = av_default_item_name,
2524 .version = LIBAVUTIL_VERSION_INT,
2527 AVOutputFormat ff_webm_muxer = {
2529 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2530 .mime_type = "video/webm",
2531 .extensions = "webm",
2532 .priv_data_size = sizeof(MatroskaMuxContext),
2533 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2534 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2535 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2537 .write_header = mkv_write_header,
2538 .write_packet = mkv_write_flush_packet,
2539 .write_trailer = mkv_write_trailer,
2540 .check_bitstream = mkv_check_bitstream,
2541 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2542 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2543 .priv_class = &webm_class,
2547 #if CONFIG_MATROSKA_AUDIO_MUXER
2548 static const AVClass mka_class = {
2549 .class_name = "matroska audio muxer",
2550 .item_name = av_default_item_name,
2552 .version = LIBAVUTIL_VERSION_INT,
2554 AVOutputFormat ff_matroska_audio_muxer = {
2556 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2557 .mime_type = "audio/x-matroska",
2558 .extensions = "mka",
2559 .priv_data_size = sizeof(MatroskaMuxContext),
2560 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2561 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2562 .video_codec = AV_CODEC_ID_NONE,
2564 .write_header = mkv_write_header,
2565 .write_packet = mkv_write_flush_packet,
2566 .write_trailer = mkv_write_trailer,
2567 .check_bitstream = mkv_check_bitstream,
2568 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2570 .codec_tag = (const AVCodecTag* const []){
2571 ff_codec_wav_tags, additional_audio_tags, 0
2573 .priv_class = &mka_class,