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;
125 int64_t segment_offset;
127 int64_t cluster_pos; ///< file offset of the current cluster
129 int64_t duration_offset;
131 mkv_seekhead *main_seekhead;
134 mkv_attachments *attachments;
136 AVPacket cur_audio_pkt;
138 int have_attachments;
141 int reserve_cues_space;
142 int cluster_size_limit;
144 int64_t cluster_time_limit;
146 int dash_track_number;
150 uint32_t chapter_id_offset;
153 int64_t last_track_timestamp[MAX_TRACKS];
155 int64_t* stream_durations;
156 int64_t* stream_duration_offsets;
159 } MatroskaMuxContext;
162 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
163 * offset, 4 bytes for target EBML ID */
164 #define MAX_SEEKENTRY_SIZE 21
166 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 4
168 #define MAX_CUETRACKPOS_SIZE 42
170 /** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */
171 #define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE * num_tracks
173 /** Seek preroll value for opus */
174 #define OPUS_SEEK_PREROLL 80000000
176 static int ebml_id_size(unsigned int id)
178 return (av_log2(id + 1) - 1) / 7 + 1;
181 static void put_ebml_id(AVIOContext *pb, unsigned int id)
183 int i = ebml_id_size(id);
185 avio_w8(pb, (uint8_t)(id >> (i * 8)));
189 * Write an EBML size meaning "unknown size".
191 * @param bytes The number of bytes the size should occupy (maximum: 8).
193 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
195 av_assert0(bytes <= 8);
196 avio_w8(pb, 0x1ff >> bytes);
197 ffio_fill(pb, 0xff, bytes - 1);
201 * Calculate how many bytes are needed to represent a given number in EBML.
203 static int ebml_num_size(uint64_t num)
206 while ((num + 1) >> bytes * 7)
212 * Write a number in EBML variable length format.
214 * @param bytes The number of bytes that need to be used to write the number.
215 * If zero, any number of bytes can be used.
217 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
219 int i, needed_bytes = ebml_num_size(num);
221 // sizes larger than this are currently undefined in EBML
222 av_assert0(num < (1ULL << 56) - 1);
225 // don't care how many bytes are used, so use the min
226 bytes = needed_bytes;
227 // the bytes needed to write the given size would exceed the bytes
228 // that we need to use, so write unknown size. This shouldn't happen.
229 av_assert0(bytes >= needed_bytes);
231 num |= 1ULL << bytes * 7;
232 for (i = bytes - 1; i >= 0; i--)
233 avio_w8(pb, (uint8_t)(num >> i * 8));
236 static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val)
243 put_ebml_id(pb, elementid);
244 put_ebml_num(pb, bytes, 0);
245 for (i = bytes - 1; i >= 0; i--)
246 avio_w8(pb, (uint8_t)(val >> i * 8));
249 static void put_ebml_sint(AVIOContext *pb, unsigned int elementid, int64_t val)
252 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
254 while (tmp>>=8) bytes++;
256 put_ebml_id(pb, elementid);
257 put_ebml_num(pb, bytes, 0);
258 for (i = bytes - 1; i >= 0; i--)
259 avio_w8(pb, (uint8_t)(val >> i * 8));
262 static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val)
264 put_ebml_id(pb, elementid);
265 put_ebml_num(pb, 8, 0);
266 avio_wb64(pb, av_double2int(val));
269 static void put_ebml_binary(AVIOContext *pb, unsigned int elementid,
270 const void *buf, int size)
272 put_ebml_id(pb, elementid);
273 put_ebml_num(pb, size, 0);
274 avio_write(pb, buf, size);
277 static void put_ebml_string(AVIOContext *pb, unsigned int elementid,
280 put_ebml_binary(pb, elementid, str, strlen(str));
284 * Write a void element of a given size. Useful for reserving space in
285 * the file to be written to later.
287 * @param size The number of bytes to reserve, which must be at least 2.
289 static void put_ebml_void(AVIOContext *pb, uint64_t size)
291 int64_t currentpos = avio_tell(pb);
293 av_assert0(size >= 2);
295 put_ebml_id(pb, EBML_ID_VOID);
296 // we need to subtract the length needed to store the size from the
297 // size we need to reserve so 2 cases, we use 8 bytes to store the
298 // size if possible, 1 byte otherwise
300 put_ebml_num(pb, size - 2, 0);
302 put_ebml_num(pb, size - 9, 8);
303 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
306 static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid,
307 uint64_t expectedsize)
309 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
310 put_ebml_id(pb, elementid);
311 put_ebml_size_unknown(pb, bytes);
312 return (ebml_master) {avio_tell(pb), bytes };
315 static void end_ebml_master(AVIOContext *pb, ebml_master master)
317 int64_t pos = avio_tell(pb);
319 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
321 put_ebml_num(pb, pos - master.pos, master.sizebytes);
322 avio_seek(pb, pos, SEEK_SET);
325 static int start_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
326 ebml_master *master, unsigned int elementid, uint64_t expectedsize)
330 if ((ret = avio_open_dyn_buf(dyn_cp)) < 0)
334 *master = start_ebml_master(pb, elementid, expectedsize);
335 if (mkv->write_crc && mkv->mode != MODE_WEBM)
336 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
338 *master = start_ebml_master(*dyn_cp, elementid, expectedsize);
343 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
346 uint8_t *buf, crc[4];
350 size = avio_close_dyn_buf(*dyn_cp, &buf);
351 if (mkv->write_crc && mkv->mode != MODE_WEBM) {
352 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
353 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
354 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
356 avio_write(pb, buf + skip, size - skip);
357 end_ebml_master(pb, master);
359 end_ebml_master(*dyn_cp, master);
360 size = avio_close_dyn_buf(*dyn_cp, &buf);
361 avio_write(pb, buf, size);
367 static void put_xiph_size(AVIOContext *pb, int size)
369 ffio_fill(pb, 255, size / 255);
370 avio_w8(pb, size % 255);
374 * Free the members allocated in the mux context.
376 static void mkv_free(MatroskaMuxContext *mkv) {
377 if (mkv->main_seekhead) {
378 av_freep(&mkv->main_seekhead->entries);
379 av_freep(&mkv->main_seekhead);
382 av_freep(&mkv->cues->entries);
383 av_freep(&mkv->cues);
385 if (mkv->attachments) {
386 av_freep(&mkv->attachments->entries);
387 av_freep(&mkv->attachments);
389 av_freep(&mkv->tracks);
390 av_freep(&mkv->stream_durations);
391 av_freep(&mkv->stream_duration_offsets);
395 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
396 * elements. If a maximum number of elements is specified, enough space
397 * will be reserved at the current file location to write a seek head of
400 * @param segment_offset The absolute offset to the position in the file
401 * where the segment begins.
402 * @param numelements The maximum number of elements that will be indexed
403 * by this seek head, 0 if unlimited.
405 static mkv_seekhead *mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset,
408 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
412 new_seekhead->segment_offset = segment_offset;
414 if (numelements > 0) {
415 new_seekhead->filepos = avio_tell(pb);
416 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
417 // and size, 6 bytes for a CRC32 element, and 3 bytes to guarantee
418 // that an EBML void element will fit afterwards
419 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 19;
420 new_seekhead->max_entries = numelements;
421 put_ebml_void(pb, new_seekhead->reserved_size);
426 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
428 mkv_seekhead_entry *entries = seekhead->entries;
430 // don't store more elements than we reserved space for
431 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
434 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
436 return AVERROR(ENOMEM);
437 seekhead->entries = entries;
439 seekhead->entries[seekhead->num_entries].elementid = elementid;
440 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
446 * Write the seek head to the file and free it. If a maximum number of
447 * elements was specified to mkv_start_seekhead(), the seek head will
448 * be written at the location reserved for it. Otherwise, it is written
449 * at the current location in the file.
451 * @return The file offset where the seekhead was written,
452 * -1 if an error occurred.
454 static int64_t mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv)
457 mkv_seekhead *seekhead = mkv->main_seekhead;
458 ebml_master metaseek, seekentry;
462 currentpos = avio_tell(pb);
464 if (seekhead->reserved_size > 0) {
465 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
471 if (start_ebml_master_crc32(pb, &dyn_cp, mkv, &metaseek, MATROSKA_ID_SEEKHEAD,
472 seekhead->reserved_size) < 0) {
477 for (i = 0; i < seekhead->num_entries; i++) {
478 mkv_seekhead_entry *entry = &seekhead->entries[i];
480 seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
482 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
483 put_ebml_num(dyn_cp, ebml_id_size(entry->elementid), 0);
484 put_ebml_id(dyn_cp, entry->elementid);
486 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
487 end_ebml_master(dyn_cp, seekentry);
489 end_ebml_master_crc32(pb, &dyn_cp, mkv, metaseek);
491 if (seekhead->reserved_size > 0) {
492 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
493 put_ebml_void(pb, remaining);
494 avio_seek(pb, currentpos, SEEK_SET);
496 currentpos = seekhead->filepos;
499 av_freep(&mkv->main_seekhead->entries);
500 av_freep(&mkv->main_seekhead);
505 static mkv_cues *mkv_start_cues(int64_t segment_offset)
507 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
511 cues->segment_offset = segment_offset;
515 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
516 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
518 mkv_cuepoint *entries = cues->entries;
523 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
525 return AVERROR(ENOMEM);
526 cues->entries = entries;
528 cues->entries[cues->num_entries].pts = ts;
529 cues->entries[cues->num_entries].stream_idx = stream;
530 cues->entries[cues->num_entries].tracknum = tracknum;
531 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
532 cues->entries[cues->num_entries].relative_pos = relative_pos;
533 cues->entries[cues->num_entries++].duration = duration;
538 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
540 MatroskaMuxContext *mkv = s->priv_data;
541 AVIOContext *dyn_cp, *pb = s->pb;
542 ebml_master cues_element;
546 currentpos = avio_tell(pb);
547 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, &cues_element, MATROSKA_ID_CUES, 0);
551 for (i = 0; i < cues->num_entries; i++) {
552 ebml_master cuepoint, track_positions;
553 mkv_cuepoint *entry = &cues->entries[i];
554 uint64_t pts = entry->pts;
557 // Calculate the number of entries, so we know the element size
558 for (j = 0; j < num_tracks; j++)
559 tracks[j].has_cue = 0;
560 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
561 int tracknum = entry[j].stream_idx;
562 av_assert0(tracknum>=0 && tracknum<num_tracks);
563 if (tracks[tracknum].has_cue && s->streams[tracknum]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
565 tracks[tracknum].has_cue = 1;
569 cuepoint = start_ebml_master(dyn_cp, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(ctp_nb));
570 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETIME, pts);
572 // put all the entries from different tracks that have the exact same
573 // timestamp into the same CuePoint
574 for (j = 0; j < num_tracks; j++)
575 tracks[j].has_cue = 0;
576 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
577 int tracknum = entry[j].stream_idx;
578 av_assert0(tracknum>=0 && tracknum<num_tracks);
579 if (tracks[tracknum].has_cue && s->streams[tracknum]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
581 tracks[tracknum].has_cue = 1;
582 track_positions = start_ebml_master(dyn_cp, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
583 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETRACK , entry[j].tracknum );
584 put_ebml_uint(dyn_cp, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
585 put_ebml_uint(dyn_cp, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
586 if (entry[j].duration != -1)
587 put_ebml_uint(dyn_cp, MATROSKA_ID_CUEDURATION , entry[j].duration);
588 end_ebml_master(dyn_cp, track_positions);
591 end_ebml_master(dyn_cp, cuepoint);
593 end_ebml_master_crc32(pb, &dyn_cp, mkv, cues_element);
598 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
600 const uint8_t *header_start[3];
602 int first_header_size;
605 if (par->codec_id == AV_CODEC_ID_VORBIS)
606 first_header_size = 30;
608 first_header_size = 42;
610 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
611 first_header_size, header_start, header_len) < 0) {
612 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
616 avio_w8(pb, 2); // number packets - 1
617 for (j = 0; j < 2; j++) {
618 put_xiph_size(pb, header_len[j]);
620 for (j = 0; j < 3; j++)
621 avio_write(pb, header_start[j], header_len[j]);
626 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
628 if (par->extradata && par->extradata_size == 2)
629 avio_write(pb, par->extradata, 2);
631 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
635 static int put_flac_codecpriv(AVFormatContext *s,
636 AVIOContext *pb, AVCodecParameters *par)
638 int write_comment = (par->channel_layout &&
639 !(par->channel_layout & ~0x3ffffULL) &&
640 !ff_flac_is_native_layout(par->channel_layout));
641 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
648 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
649 "Lavf" : LIBAVFORMAT_IDENT;
650 AVDictionary *dict = NULL;
651 uint8_t buf[32], *data, *p;
654 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
655 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
657 len = ff_vorbiscomment_length(dict, vendor);
658 if (len >= ((1<<24) - 4))
659 return AVERROR(EINVAL);
661 data = av_malloc(len + 4);
664 return AVERROR(ENOMEM);
668 AV_WB24(data + 1, len);
671 ff_vorbiscomment_write(&p, &dict, vendor);
673 avio_write(pb, data, len + 4);
682 static int get_aac_sample_rates(AVFormatContext *s, AVCodecParameters *par,
683 int *sample_rate, int *output_sample_rate)
685 MPEG4AudioConfig mp4ac;
687 if (avpriv_mpeg4audio_get_config(&mp4ac, par->extradata,
688 par->extradata_size * 8, 1) < 0) {
689 av_log(s, AV_LOG_ERROR,
690 "Error parsing AAC extradata, unable to determine samplerate.\n");
691 return AVERROR(EINVAL);
694 *sample_rate = mp4ac.sample_rate;
695 *output_sample_rate = mp4ac.ext_sample_rate;
699 static int mkv_write_native_codecprivate(AVFormatContext *s,
700 AVCodecParameters *par,
703 switch (par->codec_id) {
704 case AV_CODEC_ID_VORBIS:
705 case AV_CODEC_ID_THEORA:
706 return put_xiph_codecpriv(s, dyn_cp, par);
707 case AV_CODEC_ID_FLAC:
708 return put_flac_codecpriv(s, dyn_cp, par);
709 case AV_CODEC_ID_WAVPACK:
710 return put_wv_codecpriv(dyn_cp, par);
711 case AV_CODEC_ID_H264:
712 return ff_isom_write_avcc(dyn_cp, par->extradata,
713 par->extradata_size);
714 case AV_CODEC_ID_HEVC:
715 ff_isom_write_hvcc(dyn_cp, par->extradata,
716 par->extradata_size, 0);
718 case AV_CODEC_ID_ALAC:
719 if (par->extradata_size < 36) {
720 av_log(s, AV_LOG_ERROR,
721 "Invalid extradata found, ALAC expects a 36-byte "
723 return AVERROR_INVALIDDATA;
725 avio_write(dyn_cp, par->extradata + 12,
726 par->extradata_size - 12);
729 if (par->codec_id == AV_CODEC_ID_PRORES &&
730 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
731 avio_wl32(dyn_cp, par->codec_tag);
732 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
733 avio_write(dyn_cp, par->extradata, par->extradata_size);
739 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
740 AVCodecParameters *par,
741 int native_id, int qt_id)
745 int ret, codecpriv_size;
747 ret = avio_open_dyn_buf(&dyn_cp);
752 ret = mkv_write_native_codecprivate(s, par, dyn_cp);
753 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
756 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
758 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
759 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
762 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
763 avio_wl32(dyn_cp, par->codec_tag);
764 for(i = 0; i < 0x5a - 8; i++)
767 avio_write(dyn_cp, par->extradata, par->extradata_size);
769 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
770 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
771 avcodec_get_name(par->codec_id));
774 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
776 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
777 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
778 avcodec_get_name(par->codec_id));
779 ret = AVERROR(EINVAL);
782 ff_put_bmp_header(dyn_cp, par, ff_codec_bmp_tags, 0, 0);
784 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
786 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
788 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
789 avcodec_get_name(par->codec_id));
790 ret = AVERROR(EINVAL);
793 par->codec_tag = tag;
795 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
798 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
800 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
806 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
808 uint8_t *colorinfo_ptr;
809 int side_data_size = 0;
810 int ret, colorinfo_size;
811 const uint8_t *side_data = av_stream_get_side_data(
812 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA, &side_data_size);
814 ret = avio_open_dyn_buf(&dyn_cp);
818 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
819 par->color_trc < AVCOL_TRC_NB) {
820 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
823 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
824 par->color_space < AVCOL_SPC_NB) {
825 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
827 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
828 par->color_primaries < AVCOL_PRI_NB) {
829 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
831 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
832 par->color_range < AVCOL_RANGE_NB) {
833 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
835 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
836 par->chroma_location <= AVCHROMA_LOC_TOP) {
839 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
840 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
841 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
843 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
844 ebml_master meta_element = start_ebml_master(
845 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
846 const AVMasteringDisplayMetadata *metadata =
847 (const AVMasteringDisplayMetadata*)side_data;
848 if (metadata->has_primaries) {
849 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
850 av_q2d(metadata->display_primaries[0][0]));
851 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
852 av_q2d(metadata->display_primaries[0][1]));
853 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
854 av_q2d(metadata->display_primaries[1][0]));
855 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
856 av_q2d(metadata->display_primaries[1][1]));
857 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
858 av_q2d(metadata->display_primaries[2][0]));
859 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
860 av_q2d(metadata->display_primaries[2][1]));
861 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
862 av_q2d(metadata->white_point[0]));
863 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
864 av_q2d(metadata->white_point[1]));
866 if (metadata->has_luminance) {
867 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
868 av_q2d(metadata->max_luminance));
869 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
870 av_q2d(metadata->min_luminance));
872 end_ebml_master(dyn_cp, meta_element);
875 colorinfo_size = avio_close_dyn_buf(dyn_cp, &colorinfo_ptr);
876 if (colorinfo_size) {
877 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, 0);
878 avio_write(pb, colorinfo_ptr, colorinfo_size);
879 end_ebml_master(pb, colorinfo);
881 av_free(colorinfo_ptr);
885 static void mkv_write_field_order(AVIOContext *pb, int mode,
886 enum AVFieldOrder field_order)
888 switch (field_order) {
889 case AV_FIELD_UNKNOWN:
891 case AV_FIELD_PROGRESSIVE:
892 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
893 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
899 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
900 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
901 if (mode != MODE_WEBM) {
902 switch (field_order) {
904 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
905 MATROSKA_VIDEO_FIELDORDER_TT);
908 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
909 MATROSKA_VIDEO_FIELDORDER_BB);
912 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
913 MATROSKA_VIDEO_FIELDORDER_TB);
916 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
917 MATROSKA_VIDEO_FIELDORDER_BT);
924 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
925 AVStream *st, int mode, int *h_width, int *h_height)
929 AVDictionaryEntry *tag;
930 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
934 // convert metadata into proper side data and add it to the stream
935 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
936 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
937 int stereo_mode = atoi(tag->value);
939 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
940 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
945 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
946 stereo_mode != 10 && stereo_mode != 12) {
947 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
953 // iterate to find the stereo3d side data
954 for (i = 0; i < st->nb_side_data; i++) {
955 AVPacketSideData sd = st->side_data[i];
956 if (sd.type == AV_PKT_DATA_STEREO3D) {
957 AVStereo3D *stereo = (AVStereo3D *)sd.data;
959 switch (stereo->type) {
961 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
963 case AV_STEREO3D_SIDEBYSIDE:
964 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
965 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
966 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
969 case AV_STEREO3D_TOPBOTTOM:
970 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
971 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
975 case AV_STEREO3D_CHECKERBOARD:
976 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
977 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
980 case AV_STEREO3D_LINES:
981 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
982 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
986 case AV_STEREO3D_COLUMNS:
987 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
988 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
992 case AV_STEREO3D_FRAMESEQUENCE:
993 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
994 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1002 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1005 // if webm, do not write unsupported modes
1006 if ((mode == MODE_WEBM &&
1007 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1008 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1009 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1010 av_log(s, AV_LOG_ERROR,
1011 "The specified stereo mode is not valid.\n");
1012 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1013 return AVERROR(EINVAL);
1016 // write StereoMode if format is valid
1017 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1022 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1023 int i, AVIOContext *pb, int default_stream_exists)
1025 AVStream *st = s->streams[i];
1026 AVCodecParameters *par = st->codecpar;
1027 ebml_master subinfo, track;
1030 int bit_depth = av_get_bits_per_sample(par->codec_id);
1031 int sample_rate = par->sample_rate;
1032 int output_sample_rate = 0;
1033 int display_width_div = 1;
1034 int display_height_div = 1;
1036 AVDictionaryEntry *tag;
1038 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1039 mkv->have_attachments = 1;
1043 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
1044 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1045 if (par->bits_per_raw_sample)
1046 bit_depth = par->bits_per_raw_sample;
1048 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1051 bit_depth = par->bits_per_coded_sample;
1054 if (par->codec_id == AV_CODEC_ID_AAC) {
1055 ret = get_aac_sample_rates(s, par, &sample_rate, &output_sample_rate);
1060 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1061 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
1062 mkv->is_dash ? mkv->dash_track_number : i + 1);
1063 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
1064 mkv->is_dash ? mkv->dash_track_number : i + 1);
1065 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1067 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1068 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1069 tag = av_dict_get(st->metadata, "language", NULL, 0);
1070 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1071 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
1072 } else if (tag && tag->value) {
1073 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
1076 // The default value for TRACKFLAGDEFAULT is 1, so add element
1077 // if we need to clear it.
1078 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1079 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1081 if (st->disposition & AV_DISPOSITION_FORCED)
1082 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1084 if (mkv->mode == MODE_WEBM && par->codec_id == AV_CODEC_ID_WEBVTT) {
1085 const char *codec_id;
1086 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1087 codec_id = "D_WEBVTT/CAPTIONS";
1088 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1089 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1090 codec_id = "D_WEBVTT/DESCRIPTIONS";
1091 native_id = MATROSKA_TRACK_TYPE_METADATA;
1092 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1093 codec_id = "D_WEBVTT/METADATA";
1094 native_id = MATROSKA_TRACK_TYPE_METADATA;
1096 codec_id = "D_WEBVTT/SUBTITLES";
1097 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1099 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1101 // look for a codec ID string specific to mkv to use,
1102 // if none are found, use AVI codes
1103 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1104 if (ff_mkv_codec_tags[j].id == par->codec_id) {
1105 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1110 if (par->codec_id == AV_CODEC_ID_RAWVIDEO && !par->codec_tag) {
1111 if (mkv->allow_raw_vfw) {
1114 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1115 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1116 return AVERROR(EINVAL);
1121 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1122 int64_t codecdelay = av_rescale_q(par->initial_padding,
1123 (AVRational){ 1, 48000 },
1124 (AVRational){ 1, 1000000000 });
1125 if (codecdelay < 0) {
1126 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1127 return AVERROR(EINVAL);
1129 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1130 // (AVRational){ 1, par->sample_rate },
1133 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1135 if (par->codec_id == AV_CODEC_ID_OPUS) {
1136 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1139 if (mkv->mode == MODE_WEBM && !(par->codec_id == AV_CODEC_ID_VP8 ||
1140 par->codec_id == AV_CODEC_ID_VP9 ||
1141 par->codec_id == AV_CODEC_ID_OPUS ||
1142 par->codec_id == AV_CODEC_ID_VORBIS ||
1143 par->codec_id == AV_CODEC_ID_WEBVTT)) {
1144 av_log(s, AV_LOG_ERROR,
1145 "Only VP8 or VP9 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1146 return AVERROR(EINVAL);
1149 switch (par->codec_type) {
1150 case AVMEDIA_TYPE_VIDEO:
1151 mkv->have_video = 1;
1152 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1154 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1155 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1156 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1158 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->time_base.num / st->time_base.den);
1161 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1162 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1163 par->codec_id == AV_CODEC_ID_SVQ1 ||
1164 par->codec_id == AV_CODEC_ID_SVQ3 ||
1165 par->codec_id == AV_CODEC_ID_CINEPAK))
1169 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1170 else if (!native_id) {
1171 // if there is no mkv-specific codec ID, use VFW mode
1172 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1173 mkv->tracks[i].write_dts = 1;
1174 s->internal->avoid_negative_ts_use_pts = 0;
1177 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1179 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1180 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1182 mkv_write_field_order(pb, mkv->mode, par->field_order);
1184 // check both side data and metadata for stereo information,
1185 // write the result to the bitstream if any is found
1186 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1188 &display_height_div);
1192 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1193 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1194 (par->format == AV_PIX_FMT_YUVA420P)) {
1195 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1198 // write DisplayWidth and DisplayHeight, they contain the size of
1199 // a single source view and/or the display aspect ratio
1200 if (st->sample_aspect_ratio.num) {
1201 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1202 if (d_width > INT_MAX) {
1203 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1204 return AVERROR(EINVAL);
1206 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1207 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1208 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1209 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1211 AVRational display_aspect_ratio;
1212 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1213 par->width * (int64_t)st->sample_aspect_ratio.num,
1214 par->height * (int64_t)st->sample_aspect_ratio.den,
1216 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1217 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1218 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1221 } else if (display_width_div != 1 || display_height_div != 1) {
1222 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1223 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1225 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1227 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1228 uint32_t color_space = av_le2ne32(par->codec_tag);
1229 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1231 if (s->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
1232 ret = mkv_write_video_color(pb, par, st);
1236 end_ebml_master(pb, subinfo);
1239 case AVMEDIA_TYPE_AUDIO:
1240 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1243 // no mkv-specific ID, use ACM mode
1244 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1246 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1247 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1248 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1249 if (output_sample_rate)
1250 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1252 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1253 end_ebml_master(pb, subinfo);
1256 case AVMEDIA_TYPE_SUBTITLE:
1258 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1259 return AVERROR(ENOSYS);
1262 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1263 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1265 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1268 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1269 return AVERROR(EINVAL);
1272 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1273 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1278 end_ebml_master(pb, track);
1283 static int mkv_write_tracks(AVFormatContext *s)
1285 MatroskaMuxContext *mkv = s->priv_data;
1286 AVIOContext *dyn_cp, *pb = s->pb;
1288 int i, ret, default_stream_exists = 0;
1290 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
1294 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, &tracks, MATROSKA_ID_TRACKS, 0);
1298 for (i = 0; i < s->nb_streams; i++) {
1299 AVStream *st = s->streams[i];
1300 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1302 for (i = 0; i < s->nb_streams; i++) {
1303 ret = mkv_write_track(s, mkv, i, dyn_cp, default_stream_exists);
1307 end_ebml_master_crc32(pb, &dyn_cp, mkv, tracks);
1311 static int mkv_write_chapters(AVFormatContext *s)
1313 MatroskaMuxContext *mkv = s->priv_data;
1314 AVIOContext *dyn_cp, *pb = s->pb;
1315 ebml_master chapters, editionentry;
1316 AVRational scale = {1, 1E9};
1319 if (!s->nb_chapters || mkv->wrote_chapters)
1322 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1323 if (ret < 0) return ret;
1325 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, &chapters, MATROSKA_ID_CHAPTERS, 0);
1326 if (ret < 0) return ret;
1328 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1329 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1330 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1331 for (i = 0; i < s->nb_chapters; i++) {
1332 ebml_master chapteratom, chapterdisplay;
1333 AVChapter *c = s->chapters[i];
1334 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1335 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1336 AVDictionaryEntry *t = NULL;
1337 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1338 av_log(s, AV_LOG_ERROR,
1339 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1340 chapterstart, chapterend);
1341 return AVERROR_INVALIDDATA;
1344 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1345 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1346 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1347 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1348 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1349 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1350 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1351 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1352 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1353 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1354 end_ebml_master(dyn_cp, chapterdisplay);
1356 end_ebml_master(dyn_cp, chapteratom);
1358 end_ebml_master(dyn_cp, editionentry);
1359 end_ebml_master_crc32(pb, &dyn_cp, mkv, chapters);
1361 mkv->wrote_chapters = 1;
1365 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1367 uint8_t *key = av_strdup(t->key);
1369 const uint8_t *lang = NULL;
1373 return AVERROR(ENOMEM);
1375 if ((p = strrchr(p, '-')) &&
1376 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1383 else if (*p >= 'a' && *p <= 'z')
1388 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1389 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1391 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1392 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1393 end_ebml_master(pb, tag);
1399 static int mkv_write_tag_targets(AVFormatContext *s,
1400 unsigned int elementid, unsigned int uid,
1401 ebml_master *tags, ebml_master* tag)
1404 MatroskaMuxContext *mkv = s->priv_data;
1405 ebml_master targets;
1409 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1410 if (ret < 0) return ret;
1412 start_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, tags, MATROSKA_ID_TAGS, 0);
1416 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1417 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1419 put_ebml_uint(pb, elementid, uid);
1420 end_ebml_master(pb, targets);
1424 static int mkv_check_tag_name(const char *name, unsigned int elementid)
1426 return av_strcasecmp(name, "title") &&
1427 av_strcasecmp(name, "stereo_mode") &&
1428 av_strcasecmp(name, "creation_time") &&
1429 av_strcasecmp(name, "encoding_tool") &&
1430 av_strcasecmp(name, "duration") &&
1431 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1432 av_strcasecmp(name, "language")) &&
1433 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1434 (av_strcasecmp(name, "filename") &&
1435 av_strcasecmp(name, "mimetype")));
1438 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
1439 unsigned int uid, ebml_master *tags)
1441 MatroskaMuxContext *mkv = s->priv_data;
1444 AVDictionaryEntry *t = NULL;
1446 ret = mkv_write_tag_targets(s, elementid, uid, tags, &tag);
1450 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1451 if (mkv_check_tag_name(t->key, elementid)) {
1452 ret = mkv_write_simpletag(mkv->tags_bc, t);
1458 end_ebml_master(mkv->tags_bc, tag);
1462 static int mkv_check_tag(AVDictionary *m, unsigned int elementid)
1464 AVDictionaryEntry *t = NULL;
1466 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1467 if (mkv_check_tag_name(t->key, elementid))
1473 static int mkv_write_tags(AVFormatContext *s)
1475 MatroskaMuxContext *mkv = s->priv_data;
1478 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1480 if (mkv_check_tag(s->metadata, 0)) {
1481 ret = mkv_write_tag(s, s->metadata, 0, 0, &mkv->tags);
1482 if (ret < 0) return ret;
1485 for (i = 0; i < s->nb_streams; i++) {
1486 AVStream *st = s->streams[i];
1488 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1491 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1494 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &mkv->tags);
1495 if (ret < 0) return ret;
1498 if (s->pb->seekable && !mkv->is_live) {
1499 for (i = 0; i < s->nb_streams; i++) {
1501 AVStream *st = s->streams[i];
1502 ebml_master tag_target;
1505 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1508 mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &mkv->tags, &tag_target);
1511 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1512 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1513 mkv->stream_duration_offsets[i] = avio_tell(pb);
1515 // Reserve space to write duration as a 20-byte string.
1516 // 2 (ebml id) + 1 (data size) + 20 (data)
1517 put_ebml_void(pb, 23);
1518 end_ebml_master(pb, tag);
1519 end_ebml_master(pb, tag_target);
1523 for (i = 0; i < s->nb_chapters; i++) {
1524 AVChapter *ch = s->chapters[i];
1526 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1529 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &mkv->tags);
1530 if (ret < 0) return ret;
1533 if (mkv->have_attachments) {
1534 for (i = 0; i < mkv->attachments->num_entries; i++) {
1535 mkv_attachment *attachment = &mkv->attachments->entries[i];
1536 AVStream *st = s->streams[attachment->stream_idx];
1538 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1541 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID, attachment->fileuid, &mkv->tags);
1547 if (mkv->tags.pos) {
1548 if (s->pb->seekable && !mkv->is_live)
1549 put_ebml_void(s->pb, avio_tell(mkv->tags_bc));
1551 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, mkv->tags);
1556 static int mkv_write_attachments(AVFormatContext *s)
1558 MatroskaMuxContext *mkv = s->priv_data;
1559 AVIOContext *dyn_cp, *pb = s->pb;
1560 ebml_master attachments;
1564 if (!mkv->have_attachments)
1567 mkv->attachments = av_mallocz(sizeof(*mkv->attachments));
1568 if (!mkv->attachments)
1569 return AVERROR(ENOMEM);
1571 av_lfg_init(&c, av_get_random_seed());
1573 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1574 if (ret < 0) return ret;
1576 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, &attachments, MATROSKA_ID_ATTACHMENTS, 0);
1577 if (ret < 0) return ret;
1579 for (i = 0; i < s->nb_streams; i++) {
1580 AVStream *st = s->streams[i];
1581 ebml_master attached_file;
1582 mkv_attachment *attachment = mkv->attachments->entries;
1583 AVDictionaryEntry *t;
1584 const char *mimetype = NULL;
1587 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1590 attachment = av_realloc_array(attachment, mkv->attachments->num_entries + 1, sizeof(mkv_attachment));
1592 return AVERROR(ENOMEM);
1593 mkv->attachments->entries = attachment;
1595 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1597 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1598 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1599 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1600 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1601 return AVERROR(EINVAL);
1603 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1604 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1605 mimetype = t->value;
1606 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1608 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1609 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1610 mimetype = ff_mkv_mime_tags[i].str;
1613 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1614 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1615 mimetype = ff_mkv_image_mime_tags[i].str;
1620 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1621 "it cannot be deduced from the codec id.\n", i);
1622 return AVERROR(EINVAL);
1625 if (s->flags & AVFMT_FLAG_BITEXACT) {
1626 struct AVSHA *sha = av_sha_alloc();
1629 return AVERROR(ENOMEM);
1630 av_sha_init(sha, 160);
1631 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1632 av_sha_final(sha, digest);
1634 fileuid = AV_RL32(digest);
1636 fileuid = av_lfg_get(&c);
1638 av_log(s, AV_LOG_VERBOSE, "Using %.8"PRIx32" for attachment %d\n",
1639 fileuid, mkv->attachments->num_entries);
1641 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1642 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1643 put_ebml_uint(dyn_cp, MATROSKA_ID_FILEUID, fileuid);
1644 end_ebml_master(dyn_cp, attached_file);
1646 mkv->attachments->entries[mkv->attachments->num_entries].stream_idx = i;
1647 mkv->attachments->entries[mkv->attachments->num_entries++].fileuid = fileuid;
1649 end_ebml_master_crc32(pb, &dyn_cp, mkv, attachments);
1654 static int64_t get_metadata_duration(AVFormatContext *s)
1660 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1661 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1662 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1666 for (i = 0; i < s->nb_streams; i++) {
1668 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1670 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1671 max = FFMAX(max, us);
1674 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1678 static int mkv_write_header(AVFormatContext *s)
1680 MatroskaMuxContext *mkv = s->priv_data;
1681 AVIOContext *pb = s->pb;
1682 ebml_master ebml_header;
1683 AVDictionaryEntry *tag;
1684 int ret, i, version = 2;
1685 int64_t creation_time;
1687 if (!strcmp(s->oformat->name, "webm"))
1688 mkv->mode = MODE_WEBM;
1690 mkv->mode = MODE_MATROSKAv2;
1692 if (mkv->mode != MODE_WEBM ||
1693 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1694 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1697 for (i = 0; i < s->nb_streams; i++) {
1698 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
1699 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
1700 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
1701 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
1702 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
1703 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
1704 av_log(s, AV_LOG_ERROR,
1705 "The Matroska muxer does not yet support muxing %s\n",
1706 avcodec_get_name(s->streams[i]->codecpar->codec_id));
1707 return AVERROR_PATCHWELCOME;
1709 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1710 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1711 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1715 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1717 ret = AVERROR(ENOMEM);
1720 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1721 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1722 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1723 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1724 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1725 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1726 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1727 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1728 end_ebml_master(pb, ebml_header);
1730 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1731 mkv->segment_offset = avio_tell(pb);
1733 // we write 2 seek heads - one at the end of the file to point to each
1734 // cluster, and one at the beginning to point to all other level one
1735 // elements (including the seek head at the end of the file), which
1736 // isn't more than 10 elements if we only write one of each other
1737 // currently defined level 1 element
1738 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1739 if (!mkv->main_seekhead) {
1740 ret = AVERROR(ENOMEM);
1744 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1745 if (ret < 0) goto fail;
1747 ret = start_ebml_master_crc32(pb, &mkv->info_bc, mkv, &mkv->info, MATROSKA_ID_INFO, 0);
1752 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1753 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1754 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1755 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1756 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1757 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1758 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1760 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1762 if (mkv->mode != MODE_WEBM) {
1763 uint32_t segment_uid[4];
1766 av_lfg_init(&lfg, av_get_random_seed());
1768 for (i = 0; i < 4; i++)
1769 segment_uid[i] = av_lfg_get(&lfg);
1771 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1774 const char *ident = "Lavf";
1775 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1776 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1779 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1780 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1781 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1782 uint8_t date_utc_buf[8];
1783 AV_WB64(date_utc_buf, date_utc);
1784 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1787 // reserve space for the duration
1789 mkv->duration_offset = avio_tell(pb);
1790 if (!mkv->is_live) {
1791 int64_t metadata_duration = get_metadata_duration(s);
1793 if (s->duration > 0) {
1794 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1795 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1796 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1797 } else if (metadata_duration > 0) {
1798 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1799 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1800 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1802 put_ebml_void(pb, 11); // assumes double-precision float to be written
1805 if (s->pb->seekable && !mkv->is_live)
1806 put_ebml_void(s->pb, avio_tell(pb));
1808 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv, mkv->info);
1811 // initialize stream_duration fields
1812 mkv->stream_durations = av_mallocz(s->nb_streams * sizeof(int64_t));
1813 mkv->stream_duration_offsets = av_mallocz(s->nb_streams * sizeof(int64_t));
1815 ret = mkv_write_tracks(s);
1819 for (i = 0; i < s->nb_chapters; i++)
1820 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1822 if (mkv->mode != MODE_WEBM) {
1823 ret = mkv_write_chapters(s);
1827 ret = mkv_write_attachments(s);
1831 ret = mkv_write_tags(s);
1836 if (!s->pb->seekable && !mkv->is_live)
1837 mkv_write_seekhead(pb, mkv);
1839 mkv->cues = mkv_start_cues(mkv->segment_offset);
1841 ret = AVERROR(ENOMEM);
1844 if (pb->seekable && mkv->reserve_cues_space) {
1845 mkv->cues_pos = avio_tell(pb);
1846 put_ebml_void(pb, mkv->reserve_cues_space);
1849 av_init_packet(&mkv->cur_audio_pkt);
1850 mkv->cur_audio_pkt.size = 0;
1851 mkv->cluster_pos = -1;
1855 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1856 // after 4k and on a keyframe
1858 if (mkv->cluster_time_limit < 0)
1859 mkv->cluster_time_limit = 5000;
1860 if (mkv->cluster_size_limit < 0)
1861 mkv->cluster_size_limit = 5 * 1024 * 1024;
1863 if (mkv->cluster_time_limit < 0)
1864 mkv->cluster_time_limit = 1000;
1865 if (mkv->cluster_size_limit < 0)
1866 mkv->cluster_size_limit = 32 * 1024;
1875 static int mkv_blockgroup_size(int pkt_size)
1877 int size = pkt_size + 4;
1878 size += ebml_num_size(size);
1879 size += 2; // EBML ID for block and block duration
1880 size += 8; // max size of block duration
1881 size += ebml_num_size(size);
1882 size += 1; // blockgroup EBML ID
1886 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1893 dst = av_malloc(srclen);
1895 return AVERROR(ENOMEM);
1897 while (srclen >= WV_HEADER_SIZE) {
1900 ret = ff_wv_parse_header(&header, src);
1903 src += WV_HEADER_SIZE;
1904 srclen -= WV_HEADER_SIZE;
1906 if (srclen < header.blocksize) {
1907 ret = AVERROR_INVALIDDATA;
1911 if (header.initial) {
1912 AV_WL32(dst + offset, header.samples);
1915 AV_WL32(dst + offset, header.flags);
1916 AV_WL32(dst + offset + 4, header.crc);
1919 if (!(header.initial && header.final)) {
1920 AV_WL32(dst + offset, header.blocksize);
1924 memcpy(dst + offset, src, header.blocksize);
1925 src += header.blocksize;
1926 srclen -= header.blocksize;
1927 offset += header.blocksize;
1939 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1940 unsigned int blockid, AVPacket *pkt, int keyframe)
1942 MatroskaMuxContext *mkv = s->priv_data;
1943 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1944 uint8_t *data = NULL, *side_data = NULL;
1945 int offset = 0, size = pkt->size, side_data_size = 0;
1946 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1947 uint64_t additional_id = 0;
1948 int64_t discard_padding = 0;
1949 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
1950 ebml_master block_group, block_additions, block_more;
1952 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1953 "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", keyframe %d\n",
1954 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration,
1956 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
1957 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
1958 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1959 else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
1960 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
1961 /* extradata is Annex B, assume the bitstream is too and convert it */
1962 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1963 else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
1964 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
1966 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
1972 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
1973 /* Matroska specification requires to remove the first QuickTime atom
1979 side_data = av_packet_get_side_data(pkt,
1980 AV_PKT_DATA_SKIP_SAMPLES,
1983 if (side_data && side_data_size >= 10) {
1984 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
1985 (AVRational){1, par->sample_rate},
1986 (AVRational){1, 1000000000});
1989 side_data = av_packet_get_side_data(pkt,
1990 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
1993 additional_id = AV_RB64(side_data);
1995 side_data_size -= 8;
1998 if ((side_data_size && additional_id == 1) || discard_padding) {
1999 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2000 blockid = MATROSKA_ID_BLOCK;
2003 put_ebml_id(pb, blockid);
2004 put_ebml_num(pb, size + 4, 0);
2005 // this assumes stream_index is less than 126
2006 avio_w8(pb, 0x80 | track_number);
2007 avio_wb16(pb, ts - mkv->cluster_pts);
2008 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2009 avio_write(pb, data + offset, size);
2010 if (data != pkt->data)
2013 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2014 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE,
2015 mkv->last_track_timestamp[track_number - 1]);
2017 mkv->last_track_timestamp[track_number - 1] = ts - mkv->cluster_pts;
2019 if (discard_padding) {
2020 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2023 if (side_data_size && additional_id == 1) {
2024 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2025 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2026 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
2027 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
2028 put_ebml_num(pb, side_data_size, 0);
2029 avio_write(pb, side_data, side_data_size);
2030 end_ebml_master(pb, block_more);
2031 end_ebml_master(pb, block_additions);
2033 if ((side_data_size && additional_id == 1) || discard_padding) {
2034 end_ebml_master(pb, block_group);
2038 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2040 MatroskaMuxContext *mkv = s->priv_data;
2041 ebml_master blockgroup;
2042 int id_size, settings_size, size;
2043 uint8_t *id, *settings;
2044 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2045 const int flags = 0;
2048 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2052 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2055 size = id_size + 1 + settings_size + 1 + pkt->size;
2057 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
2058 "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", flags %d\n",
2059 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
2061 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2063 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2064 put_ebml_num(pb, size + 4, 0);
2065 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
2066 avio_wb16(pb, ts - mkv->cluster_pts);
2068 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2070 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2071 end_ebml_master(pb, blockgroup);
2073 return pkt->duration;
2076 static void mkv_start_new_cluster(AVFormatContext *s, AVPacket *pkt)
2078 MatroskaMuxContext *mkv = s->priv_data;
2080 end_ebml_master_crc32(s->pb, &mkv->dyn_bc, mkv, mkv->cluster);
2081 mkv->cluster_pos = -1;
2082 if (s->pb->seekable)
2083 av_log(s, AV_LOG_DEBUG,
2084 "Starting new cluster at offset %" PRIu64 " bytes, "
2085 "pts %" PRIu64 "dts %" PRIu64 "\n",
2086 avio_tell(s->pb), pkt->pts, pkt->dts);
2088 av_log(s, AV_LOG_DEBUG, "Starting new cluster, "
2089 "pts %" PRIu64 "dts %" PRIu64 "\n",
2090 pkt->pts, pkt->dts);
2094 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2096 MatroskaMuxContext *mkv = s->priv_data;
2097 AVIOContext *pb = s->pb;
2098 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2099 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2100 int duration = pkt->duration;
2102 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2103 int64_t relative_packet_pos;
2104 int dash_tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
2106 if (ts == AV_NOPTS_VALUE) {
2107 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2108 return AVERROR(EINVAL);
2110 ts += mkv->tracks[pkt->stream_index].ts_offset;
2112 if (mkv->cluster_pos != -1) {
2113 int64_t cluster_time = ts - mkv->cluster_pts + mkv->tracks[pkt->stream_index].ts_offset;
2114 if ((int16_t)cluster_time != cluster_time) {
2115 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2116 mkv_start_new_cluster(s, pkt);
2120 if (mkv->cluster_pos == -1) {
2121 mkv->cluster_pos = avio_tell(s->pb);
2122 ret = start_ebml_master_crc32(s->pb, &mkv->dyn_bc, mkv, &mkv->cluster, MATROSKA_ID_CLUSTER, 0);
2125 put_ebml_uint(mkv->dyn_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2126 mkv->cluster_pts = FFMAX(0, ts);
2130 relative_packet_pos = avio_tell(pb);
2132 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2133 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2134 if (s->pb->seekable && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2135 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
2136 if (ret < 0) return ret;
2139 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2140 duration = mkv_write_vtt_blocks(s, pb, pkt);
2142 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2143 mkv_blockgroup_size(pkt->size));
2145 #if FF_API_CONVERGENCE_DURATION
2146 FF_DISABLE_DEPRECATION_WARNINGS
2147 /* For backward compatibility, prefer convergence_duration. */
2148 if (pkt->convergence_duration > 0) {
2149 duration = pkt->convergence_duration;
2151 FF_ENABLE_DEPRECATION_WARNINGS
2153 /* All subtitle blocks are considered to be keyframes. */
2154 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2155 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2156 end_ebml_master(pb, blockgroup);
2159 if (s->pb->seekable) {
2160 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts,
2161 mkv->cluster_pos, relative_packet_pos, duration);
2167 mkv->duration = FFMAX(mkv->duration, ts + duration);
2169 if (mkv->stream_durations)
2170 mkv->stream_durations[pkt->stream_index] =
2171 FFMAX(mkv->stream_durations[pkt->stream_index], ts + duration);
2176 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2178 MatroskaMuxContext *mkv = s->priv_data;
2179 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2180 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2182 int64_t cluster_time;
2184 int start_new_cluster;
2186 if (mkv->tracks[pkt->stream_index].write_dts)
2187 cluster_time = pkt->dts - mkv->cluster_pts;
2189 cluster_time = pkt->pts - mkv->cluster_pts;
2190 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2192 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
2193 // after 4k and on a keyframe
2194 cluster_size = avio_tell(mkv->dyn_bc);
2196 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2197 // WebM DASH specification states that the first block of every cluster
2198 // has to be a key frame. So for DASH video, we only create a cluster
2199 // on seeing key frames.
2200 start_new_cluster = keyframe;
2201 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2202 (mkv->cluster_pos == -1 ||
2203 cluster_time > mkv->cluster_time_limit)) {
2204 // For DASH audio, we create a Cluster based on cluster_time_limit
2205 start_new_cluster = 1;
2206 } else if (!mkv->is_dash &&
2207 (cluster_size > mkv->cluster_size_limit ||
2208 cluster_time > mkv->cluster_time_limit ||
2209 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2210 cluster_size > 4 * 1024))) {
2211 start_new_cluster = 1;
2213 start_new_cluster = 0;
2216 if (mkv->cluster_pos != -1 && start_new_cluster) {
2217 mkv_start_new_cluster(s, pkt);
2220 if (!mkv->cluster_pos)
2221 avio_write_marker(s->pb,
2222 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2223 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2225 // check if we have an audio packet cached
2226 if (mkv->cur_audio_pkt.size > 0) {
2227 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2228 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2229 mkv->is_dash ? start_new_cluster : 0);
2230 av_packet_unref(&mkv->cur_audio_pkt);
2232 av_log(s, AV_LOG_ERROR,
2233 "Could not write cached audio packet ret:%d\n", ret);
2238 // buffer an audio packet to ensure the packet containing the video
2239 // keyframe's timecode is contained in the same cluster for WebM
2240 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2241 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2243 ret = mkv_write_packet_internal(s, pkt, 0);
2247 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2249 MatroskaMuxContext *mkv = s->priv_data;
2252 if (mkv->cluster_pos != -1) {
2253 end_ebml_master_crc32(s->pb, &mkv->dyn_bc, mkv, mkv->cluster);
2254 mkv->cluster_pos = -1;
2255 if (s->pb->seekable)
2256 av_log(s, AV_LOG_DEBUG,
2257 "Flushing cluster at offset %" PRIu64 " bytes\n",
2260 av_log(s, AV_LOG_DEBUG, "Flushing cluster\n");
2265 return mkv_write_packet(s, pkt);
2268 static int mkv_write_trailer(AVFormatContext *s)
2270 MatroskaMuxContext *mkv = s->priv_data;
2271 AVIOContext *pb = s->pb;
2272 int64_t currentpos, cuespos;
2275 // check if we have an audio packet cached
2276 if (mkv->cur_audio_pkt.size > 0) {
2277 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2278 av_packet_unref(&mkv->cur_audio_pkt);
2280 av_log(s, AV_LOG_ERROR,
2281 "Could not write cached audio packet ret:%d\n", ret);
2287 end_ebml_master_crc32(pb, &mkv->dyn_bc, mkv, mkv->cluster);
2290 if (mkv->mode != MODE_WEBM) {
2291 ret = mkv_write_chapters(s);
2296 if (pb->seekable && !mkv->is_live) {
2297 if (mkv->cues->num_entries) {
2298 if (mkv->reserve_cues_space) {
2301 currentpos = avio_tell(pb);
2302 avio_seek(pb, mkv->cues_pos, SEEK_SET);
2304 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2305 cues_end = avio_tell(pb);
2306 if (cues_end > cuespos + mkv->reserve_cues_space) {
2307 av_log(s, AV_LOG_ERROR,
2308 "Insufficient space reserved for cues: %d "
2309 "(needed: %" PRId64 ").\n",
2310 mkv->reserve_cues_space, cues_end - cuespos);
2311 return AVERROR(EINVAL);
2314 if (cues_end < cuespos + mkv->reserve_cues_space)
2315 put_ebml_void(pb, mkv->reserve_cues_space -
2316 (cues_end - cuespos));
2318 avio_seek(pb, currentpos, SEEK_SET);
2320 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2323 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES,
2329 mkv_write_seekhead(pb, mkv);
2331 // update the duration
2332 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2333 currentpos = avio_tell(pb);
2334 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2335 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2336 avio_seek(pb, mkv->info.pos, SEEK_SET);
2337 end_ebml_master_crc32(pb, &mkv->info_bc, mkv, mkv->info);
2339 // update stream durations
2340 if (!mkv->is_live && mkv->stream_durations) {
2342 int64_t curr = avio_tell(mkv->tags_bc);
2343 for (i = 0; i < s->nb_streams; ++i) {
2344 AVStream *st = s->streams[i];
2346 if (mkv->stream_duration_offsets[i] > 0) {
2347 double duration_sec = mkv->stream_durations[i] * av_q2d(st->time_base);
2348 char duration_string[20] = "";
2350 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2351 mkv->stream_durations[i]);
2353 avio_seek(mkv->tags_bc, mkv->stream_duration_offsets[i], SEEK_SET);
2355 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2356 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2357 fmod(duration_sec, 60));
2359 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2362 avio_seek(mkv->tags_bc, curr, SEEK_SET);
2364 if (mkv->tags.pos && !mkv->is_live) {
2365 avio_seek(pb, mkv->tags.pos, SEEK_SET);
2366 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv, mkv->tags);
2369 avio_seek(pb, currentpos, SEEK_SET);
2372 if (!mkv->is_live) {
2373 end_ebml_master(pb, mkv->segment);
2380 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2383 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2384 if (ff_mkv_codec_tags[i].id == codec_id)
2387 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2388 enum AVMediaType type = avcodec_get_type(codec_id);
2389 // mkv theoretically supports any video/audio through VFW/ACM
2390 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2397 static int mkv_init(struct AVFormatContext *s)
2401 if (s->avoid_negative_ts < 0) {
2402 s->avoid_negative_ts = 1;
2403 s->internal->avoid_negative_ts_use_pts = 1;
2406 for (i = 0; i < s->nb_streams; i++) {
2407 // ms precision is the de-facto standard timescale for mkv files
2408 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2414 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2417 AVStream *st = s->streams[pkt->stream_index];
2419 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2420 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2421 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2422 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2423 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2429 static const AVCodecTag additional_audio_tags[] = {
2430 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2431 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
2432 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2433 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2434 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2435 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2436 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2437 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2438 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2439 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2440 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2441 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2442 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2445 static const AVCodecTag additional_video_tags[] = {
2446 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2447 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2448 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2449 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
2450 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
2451 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2454 static const AVCodecTag additional_subtitle_tags[] = {
2455 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2456 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2457 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2460 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2461 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2462 static const AVOption options[] = {
2463 { "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 },
2464 { "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 },
2465 { "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 },
2466 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2467 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2468 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2469 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2470 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2474 #if CONFIG_MATROSKA_MUXER
2475 static const AVClass matroska_class = {
2476 .class_name = "matroska muxer",
2477 .item_name = av_default_item_name,
2479 .version = LIBAVUTIL_VERSION_INT,
2482 AVOutputFormat ff_matroska_muxer = {
2484 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2485 .mime_type = "video/x-matroska",
2486 .extensions = "mkv",
2487 .priv_data_size = sizeof(MatroskaMuxContext),
2488 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2489 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2490 .video_codec = CONFIG_LIBX264_ENCODER ?
2491 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2493 .write_header = mkv_write_header,
2494 .write_packet = mkv_write_flush_packet,
2495 .write_trailer = mkv_write_trailer,
2496 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2497 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2498 .codec_tag = (const AVCodecTag* const []){
2499 ff_codec_bmp_tags, ff_codec_wav_tags,
2500 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2502 .subtitle_codec = AV_CODEC_ID_ASS,
2503 .query_codec = mkv_query_codec,
2504 .check_bitstream = mkv_check_bitstream,
2505 .priv_class = &matroska_class,
2509 #if CONFIG_WEBM_MUXER
2510 static const AVClass webm_class = {
2511 .class_name = "webm muxer",
2512 .item_name = av_default_item_name,
2514 .version = LIBAVUTIL_VERSION_INT,
2517 AVOutputFormat ff_webm_muxer = {
2519 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2520 .mime_type = "video/webm",
2521 .extensions = "webm",
2522 .priv_data_size = sizeof(MatroskaMuxContext),
2523 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2524 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2525 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2527 .write_header = mkv_write_header,
2528 .write_packet = mkv_write_flush_packet,
2529 .write_trailer = mkv_write_trailer,
2530 .check_bitstream = mkv_check_bitstream,
2531 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2532 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2533 .priv_class = &webm_class,
2537 #if CONFIG_MATROSKA_AUDIO_MUXER
2538 static const AVClass mka_class = {
2539 .class_name = "matroska audio muxer",
2540 .item_name = av_default_item_name,
2542 .version = LIBAVUTIL_VERSION_INT,
2544 AVOutputFormat ff_matroska_audio_muxer = {
2546 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2547 .mime_type = "audio/x-matroska",
2548 .extensions = "mka",
2549 .priv_data_size = sizeof(MatroskaMuxContext),
2550 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2551 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2552 .video_codec = AV_CODEC_ID_NONE,
2554 .write_header = mkv_write_header,
2555 .write_packet = mkv_write_flush_packet,
2556 .write_trailer = mkv_write_trailer,
2557 .check_bitstream = mkv_check_bitstream,
2558 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2560 .codec_tag = (const AVCodecTag* const []){
2561 ff_codec_wav_tags, additional_audio_tags, 0
2563 .priv_class = &mka_class,