3 * Copyright (c) 2007 David Conrad
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 #include "avio_internal.h"
28 #include "avlanguage.h"
34 #include "subtitles.h"
35 #include "vorbiscomment.h"
38 #include "libavutil/avstring.h"
39 #include "libavutil/channel_layout.h"
40 #include "libavutil/dict.h"
41 #include "libavutil/intfloat.h"
42 #include "libavutil/intreadwrite.h"
43 #include "libavutil/lfg.h"
44 #include "libavutil/mathematics.h"
45 #include "libavutil/opt.h"
46 #include "libavutil/random_seed.h"
47 #include "libavutil/samplefmt.h"
48 #include "libavutil/sha.h"
50 #include "libavcodec/xiph.h"
51 #include "libavcodec/mpeg4audio.h"
52 #include "libavcodec/internal.h"
54 typedef struct ebml_master {
55 int64_t pos; ///< absolute offset in the file where the master's elements start
56 int sizebytes; ///< how many bytes were reserved for the size
59 typedef struct mkv_seekhead_entry {
60 unsigned int elementid;
64 typedef struct mkv_seekhead {
66 int64_t segment_offset; ///< the file offset to the beginning of the segment
67 int reserved_size; ///< -1 if appending to file
69 mkv_seekhead_entry *entries;
77 int64_t cluster_pos; ///< file offset of the cluster containing the block
78 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
79 int64_t duration; ///< duration of the block according to time base
83 int64_t segment_offset;
84 mkv_cuepoint *entries;
94 #define MODE_MATROSKAv2 0x01
95 #define MODE_WEBM 0x02
97 typedef struct MatroskaMuxContext {
102 int64_t segment_offset;
104 int64_t cluster_pos; ///< file offset of the current cluster
106 int64_t duration_offset;
108 mkv_seekhead *main_seekhead;
112 AVPacket cur_audio_pkt;
114 int have_attachments;
116 int reserve_cues_space;
117 int cluster_size_limit;
119 int64_t cluster_time_limit;
121 int dash_track_number;
123 uint32_t chapter_id_offset;
125 } MatroskaMuxContext;
128 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
129 * offset, 4 bytes for target EBML ID */
130 #define MAX_SEEKENTRY_SIZE 21
132 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 4
134 #define MAX_CUETRACKPOS_SIZE 42
136 /** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */
137 #define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE*num_tracks
139 /** Seek preroll value for opus */
140 #define OPUS_SEEK_PREROLL 80000000
143 static int ebml_id_size(unsigned int id)
145 return (av_log2(id+1)-1)/7+1;
148 static void put_ebml_id(AVIOContext *pb, unsigned int id)
150 int i = ebml_id_size(id);
152 avio_w8(pb, (uint8_t)(id >> (i*8)));
156 * Write an EBML size meaning "unknown size".
158 * @param bytes The number of bytes the size should occupy (maximum: 8).
160 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
162 av_assert0(bytes <= 8);
163 avio_w8(pb, 0x1ff >> bytes);
164 ffio_fill(pb, 0xff, bytes - 1);
168 * Calculate how many bytes are needed to represent a given number in EBML.
170 static int ebml_num_size(uint64_t num)
173 while ((num+1) >> bytes*7) bytes++;
178 * Write a number in EBML variable length format.
180 * @param bytes The number of bytes that need to be used to write the number.
181 * If zero, any number of bytes can be used.
183 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
185 int i, needed_bytes = ebml_num_size(num);
187 // sizes larger than this are currently undefined in EBML
188 av_assert0(num < (1ULL<<56)-1);
191 // don't care how many bytes are used, so use the min
192 bytes = needed_bytes;
193 // the bytes needed to write the given size would exceed the bytes
194 // that we need to use, so write unknown size. This shouldn't happen.
195 av_assert0(bytes >= needed_bytes);
197 num |= 1ULL << bytes*7;
198 for (i = bytes - 1; i >= 0; i--)
199 avio_w8(pb, (uint8_t)(num >> i*8));
202 static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val)
206 while (tmp>>=8) bytes++;
208 put_ebml_id(pb, elementid);
209 put_ebml_num(pb, bytes, 0);
210 for (i = bytes - 1; i >= 0; i--)
211 avio_w8(pb, (uint8_t)(val >> i*8));
214 static void put_ebml_sint(AVIOContext *pb, unsigned int elementid, int64_t val)
217 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
219 while (tmp>>=8) bytes++;
221 put_ebml_id(pb, elementid);
222 put_ebml_num(pb, bytes, 0);
223 for (i = bytes - 1; i >= 0; i--)
224 avio_w8(pb, (uint8_t)(val >> i*8));
227 static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val)
229 put_ebml_id(pb, elementid);
230 put_ebml_num(pb, 8, 0);
231 avio_wb64(pb, av_double2int(val));
234 static void put_ebml_binary(AVIOContext *pb, unsigned int elementid,
235 const void *buf, int size)
237 put_ebml_id(pb, elementid);
238 put_ebml_num(pb, size, 0);
239 avio_write(pb, buf, size);
242 static void put_ebml_string(AVIOContext *pb, unsigned int elementid, const char *str)
244 put_ebml_binary(pb, elementid, str, strlen(str));
248 * Write a void element of a given size. Useful for reserving space in
249 * the file to be written to later.
251 * @param size The number of bytes to reserve, which must be at least 2.
253 static void put_ebml_void(AVIOContext *pb, uint64_t size)
255 int64_t currentpos = avio_tell(pb);
257 av_assert0(size >= 2);
259 put_ebml_id(pb, EBML_ID_VOID);
260 // we need to subtract the length needed to store the size from the
261 // size we need to reserve so 2 cases, we use 8 bytes to store the
262 // size if possible, 1 byte otherwise
264 put_ebml_num(pb, size-1, 0);
266 put_ebml_num(pb, size-9, 8);
267 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
270 static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid, uint64_t expectedsize)
272 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
273 put_ebml_id(pb, elementid);
274 put_ebml_size_unknown(pb, bytes);
275 return (ebml_master){ avio_tell(pb), bytes };
278 static void end_ebml_master(AVIOContext *pb, ebml_master master)
280 int64_t pos = avio_tell(pb);
282 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
284 put_ebml_num(pb, pos - master.pos, master.sizebytes);
285 avio_seek(pb, pos, SEEK_SET);
288 static void put_xiph_size(AVIOContext *pb, int size)
290 ffio_fill(pb, 255, size / 255);
291 avio_w8(pb, size % 255);
295 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
296 * elements. If a maximum number of elements is specified, enough space
297 * will be reserved at the current file location to write a seek head of
300 * @param segment_offset The absolute offset to the position in the file
301 * where the segment begins.
302 * @param numelements The maximum number of elements that will be indexed
303 * by this seek head, 0 if unlimited.
305 static mkv_seekhead * mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset, int numelements)
307 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
308 if (new_seekhead == NULL)
311 new_seekhead->segment_offset = segment_offset;
313 if (numelements > 0) {
314 new_seekhead->filepos = avio_tell(pb);
315 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
316 // and size, and 3 bytes to guarantee that an EBML void element
317 // will fit afterwards
318 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 13;
319 new_seekhead->max_entries = numelements;
320 put_ebml_void(pb, new_seekhead->reserved_size);
325 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
327 mkv_seekhead_entry *entries = seekhead->entries;
329 // don't store more elements than we reserved space for
330 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
333 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
335 return AVERROR(ENOMEM);
336 seekhead->entries = entries;
338 seekhead->entries[seekhead->num_entries].elementid = elementid;
339 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
345 * Write the seek head to the file and free it. If a maximum number of
346 * elements was specified to mkv_start_seekhead(), the seek head will
347 * be written at the location reserved for it. Otherwise, it is written
348 * at the current location in the file.
350 * @return The file offset where the seekhead was written,
351 * -1 if an error occurred.
353 static int64_t mkv_write_seekhead(AVIOContext *pb, mkv_seekhead *seekhead)
355 ebml_master metaseek, seekentry;
359 currentpos = avio_tell(pb);
361 if (seekhead->reserved_size > 0) {
362 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
368 metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size);
369 for (i = 0; i < seekhead->num_entries; i++) {
370 mkv_seekhead_entry *entry = &seekhead->entries[i];
372 seekentry = start_ebml_master(pb, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
374 put_ebml_id(pb, MATROSKA_ID_SEEKID);
375 put_ebml_num(pb, ebml_id_size(entry->elementid), 0);
376 put_ebml_id(pb, entry->elementid);
378 put_ebml_uint(pb, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
379 end_ebml_master(pb, seekentry);
381 end_ebml_master(pb, metaseek);
383 if (seekhead->reserved_size > 0) {
384 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
385 put_ebml_void(pb, remaining);
386 avio_seek(pb, currentpos, SEEK_SET);
388 currentpos = seekhead->filepos;
391 av_freep(&seekhead->entries);
397 static mkv_cues * mkv_start_cues(int64_t segment_offset)
399 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
403 cues->segment_offset = segment_offset;
407 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
408 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
410 mkv_cuepoint *entries = cues->entries;
415 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
417 return AVERROR(ENOMEM);
418 cues->entries = entries;
420 cues->entries[cues->num_entries].pts = ts;
421 cues->entries[cues->num_entries].stream_idx = stream;
422 cues->entries[cues->num_entries].tracknum = tracknum;
423 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
424 cues->entries[cues->num_entries].relative_pos = relative_pos;
425 cues->entries[cues->num_entries++].duration = duration;
430 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
432 AVIOContext *pb = s->pb;
433 ebml_master cues_element;
437 currentpos = avio_tell(pb);
438 cues_element = start_ebml_master(pb, MATROSKA_ID_CUES, 0);
440 for (i = 0; i < cues->num_entries; i++) {
441 ebml_master cuepoint, track_positions;
442 mkv_cuepoint *entry = &cues->entries[i];
443 uint64_t pts = entry->pts;
445 cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(num_tracks));
446 put_ebml_uint(pb, MATROSKA_ID_CUETIME, pts);
448 // put all the entries from different tracks that have the exact same
449 // timestamp into the same CuePoint
450 for (j = 0; j < num_tracks; j++)
451 tracks[j].has_cue = 0;
452 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
453 int tracknum = entry[j].stream_idx;
454 av_assert0(tracknum>=0 && tracknum<num_tracks);
455 if (tracks[tracknum].has_cue && s->streams[tracknum]->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
457 tracks[tracknum].has_cue = 1;
458 track_positions = start_ebml_master(pb, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
459 put_ebml_uint(pb, MATROSKA_ID_CUETRACK , entry[j].tracknum );
460 put_ebml_uint(pb, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
461 put_ebml_uint(pb, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
462 if (entry[j].duration != -1)
463 put_ebml_uint(pb, MATROSKA_ID_CUEDURATION , entry[j].duration);
464 end_ebml_master(pb, track_positions);
467 end_ebml_master(pb, cuepoint);
469 end_ebml_master(pb, cues_element);
474 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec)
476 uint8_t *header_start[3];
478 int first_header_size;
481 if (codec->codec_id == AV_CODEC_ID_VORBIS)
482 first_header_size = 30;
484 first_header_size = 42;
486 if (avpriv_split_xiph_headers(codec->extradata, codec->extradata_size,
487 first_header_size, header_start, header_len) < 0) {
488 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
492 avio_w8(pb, 2); // number packets - 1
493 for (j = 0; j < 2; j++) {
494 put_xiph_size(pb, header_len[j]);
496 for (j = 0; j < 3; j++)
497 avio_write(pb, header_start[j], header_len[j]);
502 static int put_wv_codecpriv(AVIOContext *pb, AVCodecContext *codec)
504 if (codec->extradata && codec->extradata_size == 2)
505 avio_write(pb, codec->extradata, 2);
507 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
511 static int put_flac_codecpriv(AVFormatContext *s,
512 AVIOContext *pb, AVCodecContext *codec)
514 int write_comment = (codec->channel_layout &&
515 !(codec->channel_layout & ~0x3ffffULL) &&
516 !ff_flac_is_native_layout(codec->channel_layout));
517 int ret = ff_flac_write_header(pb, codec, !write_comment);
523 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
524 "Lavf" : LIBAVFORMAT_IDENT;
525 AVDictionary *dict = NULL;
526 uint8_t buf[32], *data, *p;
529 snprintf(buf, sizeof(buf), "0x%"PRIx64, codec->channel_layout);
530 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
532 len = ff_vorbiscomment_length(dict, vendor);
533 data = av_malloc(len + 4);
536 return AVERROR(ENOMEM);
540 AV_WB24(data + 1, len);
543 ff_vorbiscomment_write(&p, &dict, vendor);
545 avio_write(pb, data, len + 4);
554 static void get_aac_sample_rates(AVFormatContext *s, AVCodecContext *codec, int *sample_rate, int *output_sample_rate)
556 MPEG4AudioConfig mp4ac;
558 if (avpriv_mpeg4audio_get_config(&mp4ac, codec->extradata,
559 codec->extradata_size * 8, 1) < 0) {
560 av_log(s, AV_LOG_WARNING, "Error parsing AAC extradata, unable to determine samplerate.\n");
564 *sample_rate = mp4ac.sample_rate;
565 *output_sample_rate = mp4ac.ext_sample_rate;
568 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec, int native_id, int qt_id)
572 int ret, codecpriv_size;
574 ret = avio_open_dyn_buf(&dyn_cp);
579 if (codec->codec_id == AV_CODEC_ID_VORBIS || codec->codec_id == AV_CODEC_ID_THEORA)
580 ret = put_xiph_codecpriv(s, dyn_cp, codec);
581 else if (codec->codec_id == AV_CODEC_ID_FLAC)
582 ret = put_flac_codecpriv(s, dyn_cp, codec);
583 else if (codec->codec_id == AV_CODEC_ID_WAVPACK)
584 ret = put_wv_codecpriv(dyn_cp, codec);
585 else if (codec->codec_id == AV_CODEC_ID_H264)
586 ret = ff_isom_write_avcc(dyn_cp, codec->extradata, codec->extradata_size);
587 else if (codec->codec_id == AV_CODEC_ID_HEVC)
588 ret = ff_isom_write_hvcc(dyn_cp, codec->extradata, codec->extradata_size, 0);
589 else if (codec->codec_id == AV_CODEC_ID_ALAC) {
590 if (codec->extradata_size < 36) {
591 av_log(s, AV_LOG_ERROR,
592 "Invalid extradata found, ALAC expects a 36-byte "
594 ret = AVERROR_INVALIDDATA;
596 avio_write(dyn_cp, codec->extradata + 12,
597 codec->extradata_size - 12);
598 } else if (codec->codec_id == AV_CODEC_ID_PRORES &&
599 ff_codec_get_id(ff_codec_movvideo_tags, codec->codec_tag) == AV_CODEC_ID_PRORES) {
600 avio_wl32(dyn_cp, codec->codec_tag);
602 else if (codec->extradata_size && codec->codec_id != AV_CODEC_ID_TTA)
603 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
604 } else if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
606 if (!codec->codec_tag)
607 codec->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags, codec->codec_id);
608 if (codec->extradata_size) {
609 if ( ff_codec_get_id(ff_codec_movvideo_tags, codec->codec_tag) == codec->codec_id
610 && ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(codec->extradata+4)) != codec->codec_id
613 avio_wb32(dyn_cp, 0x5a + codec->extradata_size);
614 avio_wl32(dyn_cp, codec->codec_tag);
615 for(i=0; i<0x5a-8; i++)
618 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
621 if (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id))
622 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
623 avcodec_get_name(codec->codec_id));
625 if (!codec->codec_tag)
626 codec->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id);
627 if (!codec->codec_tag) {
628 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
629 avcodec_get_name(codec->codec_id));
630 ret = AVERROR(EINVAL);
633 ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0, 0);
636 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
638 tag = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id);
640 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
641 avcodec_get_name(codec->codec_id));
642 ret = AVERROR(EINVAL);
644 if (!codec->codec_tag)
645 codec->codec_tag = tag;
647 ff_put_wav_header(dyn_cp, codec, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
650 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
652 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv, codecpriv_size);
657 static int mkv_write_tracks(AVFormatContext *s)
659 MatroskaMuxContext *mkv = s->priv_data;
660 AVIOContext *pb = s->pb;
662 int i, j, ret, default_stream_exists = 0;
664 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
665 if (ret < 0) return ret;
667 tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
668 for (i = 0; i < s->nb_streams; i++) {
669 AVStream *st = s->streams[i];
670 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
672 for (i = 0; i < s->nb_streams; i++) {
673 AVStream *st = s->streams[i];
674 AVCodecContext *codec = st->codec;
675 ebml_master subinfo, track;
678 int bit_depth = av_get_bits_per_sample(codec->codec_id);
679 int sample_rate = codec->sample_rate;
680 int output_sample_rate = 0;
681 int display_width_div = 1;
682 int display_height_div = 1;
683 AVDictionaryEntry *tag;
685 // ms precision is the de-facto standard timescale for mkv files
686 avpriv_set_pts_info(st, 64, 1, 1000);
688 if (codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
689 mkv->have_attachments = 1;
693 if (!bit_depth && codec->codec_id != AV_CODEC_ID_ADPCM_G726)
694 bit_depth = av_get_bytes_per_sample(codec->sample_fmt) << 3;
696 bit_depth = codec->bits_per_coded_sample;
698 if (codec->codec_id == AV_CODEC_ID_AAC)
699 get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate);
701 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
702 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
703 mkv->is_dash ? mkv->dash_track_number : i + 1);
704 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
705 mkv->is_dash ? mkv->dash_track_number : i + 1);
706 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
708 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
709 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
710 tag = av_dict_get(st->metadata, "language", NULL, 0);
711 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
712 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag ? tag->value:"und");
713 } else if (tag && tag->value) {
714 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
717 // The default value for TRACKFLAGDEFAULT is 1, so add element
718 // if we need to clear it.
719 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
720 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
722 if (st->disposition & AV_DISPOSITION_FORCED)
723 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
725 if (mkv->mode == MODE_WEBM && codec->codec_id == AV_CODEC_ID_WEBVTT) {
726 const char *codec_id;
727 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
728 codec_id = "D_WEBVTT/CAPTIONS";
729 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
730 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
731 codec_id = "D_WEBVTT/DESCRIPTIONS";
732 native_id = MATROSKA_TRACK_TYPE_METADATA;
733 } else if (st->disposition & AV_DISPOSITION_METADATA) {
734 codec_id = "D_WEBVTT/METADATA";
735 native_id = MATROSKA_TRACK_TYPE_METADATA;
737 codec_id = "D_WEBVTT/SUBTITLES";
738 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
740 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
742 // look for a codec ID string specific to mkv to use,
743 // if none are found, use AVI codes
744 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
745 if (ff_mkv_codec_tags[j].id == codec->codec_id) {
746 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
753 if (codec->codec_type == AVMEDIA_TYPE_AUDIO && codec->delay && codec->codec_id == AV_CODEC_ID_OPUS) {
754 // mkv->tracks[i].ts_offset = av_rescale_q(codec->delay,
755 // (AVRational){ 1, codec->sample_rate },
758 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY,
759 av_rescale_q(codec->delay, (AVRational){ 1, codec->sample_rate },
760 (AVRational){ 1, 1000000000 }));
762 if (codec->codec_id == AV_CODEC_ID_OPUS) {
763 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
766 if (mkv->mode == MODE_WEBM && !(codec->codec_id == AV_CODEC_ID_VP8 ||
767 codec->codec_id == AV_CODEC_ID_VP9 ||
768 codec->codec_id == AV_CODEC_ID_OPUS ||
769 codec->codec_id == AV_CODEC_ID_VORBIS ||
770 codec->codec_id == AV_CODEC_ID_WEBVTT)) {
771 av_log(s, AV_LOG_ERROR,
772 "Only VP8 or VP9 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
773 return AVERROR(EINVAL);
776 switch (codec->codec_type) {
777 case AVMEDIA_TYPE_VIDEO:
778 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
780 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
781 && 1.0/av_q2d(st->avg_frame_rate) > av_q2d(codec->time_base))
782 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1E9 / av_q2d(st->avg_frame_rate));
784 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, av_q2d(codec->time_base)*1E9);
787 ff_codec_get_tag(ff_codec_movvideo_tags, codec->codec_id) &&
788 (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id)
789 || codec->codec_id == AV_CODEC_ID_SVQ1
790 || codec->codec_id == AV_CODEC_ID_SVQ3
791 || codec->codec_id == AV_CODEC_ID_CINEPAK))
795 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
796 else if (!native_id) {
797 // if there is no mkv-specific codec ID, use VFW mode
798 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
799 mkv->tracks[i].write_dts = 1;
802 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
803 // XXX: interlace flag?
804 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , codec->width);
805 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, codec->height);
807 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
808 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
809 // save stereo mode flag
810 uint64_t st_mode = MATROSKA_VIDEO_STEREO_MODE_COUNT;
812 for (j=0; j<MATROSKA_VIDEO_STEREO_MODE_COUNT; j++)
813 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[j])){
818 if ((mkv->mode == MODE_WEBM && st_mode > 3 && st_mode != 11)
819 || st_mode >= MATROSKA_VIDEO_STEREO_MODE_COUNT) {
820 av_log(s, AV_LOG_ERROR,
821 "The specified stereo mode is not valid.\n");
822 return AVERROR(EINVAL);
824 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, st_mode);
831 display_width_div = 2;
837 display_height_div = 2;
842 if ((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) ||
843 (tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) ||
844 (codec->pix_fmt == AV_PIX_FMT_YUVA420P)) {
845 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
848 if (st->sample_aspect_ratio.num) {
849 int64_t d_width = av_rescale(codec->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
850 if (d_width > INT_MAX) {
851 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
852 return AVERROR(EINVAL);
854 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
855 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
856 } else if (display_width_div != 1 || display_height_div != 1) {
857 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , codec->width / display_width_div);
858 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
861 if (codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
862 uint32_t color_space = av_le2ne32(codec->codec_tag);
863 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
865 end_ebml_master(pb, subinfo);
868 case AVMEDIA_TYPE_AUDIO:
869 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
872 // no mkv-specific ID, use ACM mode
873 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
875 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
876 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , codec->channels);
877 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
878 if (output_sample_rate)
879 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
881 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
882 end_ebml_master(pb, subinfo);
885 case AVMEDIA_TYPE_SUBTITLE:
887 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", codec->codec_id);
888 return AVERROR(ENOSYS);
891 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT)
892 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
894 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
897 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
898 return AVERROR(EINVAL);
901 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
902 ret = mkv_write_codecprivate(s, pb, codec, native_id, qt_id);
903 if (ret < 0) return ret;
906 end_ebml_master(pb, track);
908 end_ebml_master(pb, tracks);
912 static int mkv_write_chapters(AVFormatContext *s)
914 MatroskaMuxContext *mkv = s->priv_data;
915 AVIOContext *pb = s->pb;
916 ebml_master chapters, editionentry;
917 AVRational scale = {1, 1E9};
920 if (!s->nb_chapters || mkv->wrote_chapters)
923 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
924 if (ret < 0) return ret;
926 chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
927 editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
928 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
929 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
930 for (i = 0; i < s->nb_chapters; i++) {
931 ebml_master chapteratom, chapterdisplay;
932 AVChapter *c = s->chapters[i];
933 AVDictionaryEntry *t = NULL;
935 chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
936 put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
937 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART,
938 av_rescale_q(c->start, c->time_base, scale));
939 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND,
940 av_rescale_q(c->end, c->time_base, scale));
941 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
942 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
943 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
944 chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
945 put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
946 put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und");
947 end_ebml_master(pb, chapterdisplay);
949 end_ebml_master(pb, chapteratom);
951 end_ebml_master(pb, editionentry);
952 end_ebml_master(pb, chapters);
954 mkv->wrote_chapters = 1;
958 static void mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
960 uint8_t *key = av_strdup(t->key);
962 const uint8_t *lang = NULL;
965 if ((p = strrchr(p, '-')) &&
966 (lang = av_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
973 else if (*p >= 'a' && *p <= 'z')
978 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
979 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
981 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
982 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
983 end_ebml_master(pb, tag);
988 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
989 unsigned int uid, ebml_master *tags)
991 MatroskaMuxContext *mkv = s->priv_data;
992 ebml_master tag, targets;
993 AVDictionaryEntry *t = NULL;
997 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
998 if (ret < 0) return ret;
1000 *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
1003 tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
1004 targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
1006 put_ebml_uint(s->pb, elementid, uid);
1007 end_ebml_master(s->pb, targets);
1009 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1010 if (av_strcasecmp(t->key, "title") &&
1011 av_strcasecmp(t->key, "stereo_mode") &&
1012 av_strcasecmp(t->key, "encoding_tool"))
1013 mkv_write_simpletag(s->pb, t);
1015 end_ebml_master(s->pb, tag);
1019 static int mkv_check_tag(AVDictionary *m)
1021 AVDictionaryEntry *t = NULL;
1023 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1024 if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode"))
1030 static int mkv_write_tags(AVFormatContext *s)
1032 MatroskaMuxContext *mkv = s->priv_data;
1033 ebml_master tags = {0};
1036 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1038 if (mkv_check_tag(s->metadata)) {
1039 ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
1040 if (ret < 0) return ret;
1043 for (i = 0; i < s->nb_streams; i++) {
1044 AVStream *st = s->streams[i];
1046 if (!mkv_check_tag(st->metadata))
1049 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
1050 if (ret < 0) return ret;
1053 for (i = 0; i < s->nb_chapters; i++) {
1054 AVChapter *ch = s->chapters[i];
1056 if (!mkv_check_tag(ch->metadata))
1059 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &tags);
1060 if (ret < 0) return ret;
1064 end_ebml_master(s->pb, tags);
1068 static int mkv_write_attachments(AVFormatContext *s)
1070 MatroskaMuxContext *mkv = s->priv_data;
1071 AVIOContext *pb = s->pb;
1072 ebml_master attachments;
1076 if (!mkv->have_attachments)
1079 av_lfg_init(&c, av_get_random_seed());
1081 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1082 if (ret < 0) return ret;
1084 attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0);
1086 for (i = 0; i < s->nb_streams; i++) {
1087 AVStream *st = s->streams[i];
1088 ebml_master attached_file;
1089 AVDictionaryEntry *t;
1090 const char *mimetype = NULL;
1093 if (st->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1096 attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0);
1098 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1099 put_ebml_string(pb, MATROSKA_ID_FILEDESC, t->value);
1100 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1101 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1102 return AVERROR(EINVAL);
1104 put_ebml_string(pb, MATROSKA_ID_FILENAME, t->value);
1105 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1106 mimetype = t->value;
1107 else if (st->codec->codec_id != AV_CODEC_ID_NONE ) {
1109 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1110 if (ff_mkv_mime_tags[i].id == st->codec->codec_id) {
1111 mimetype = ff_mkv_mime_tags[i].str;
1116 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1117 "it cannot be deduced from the codec id.\n", i);
1118 return AVERROR(EINVAL);
1121 if (s->flags & AVFMT_FLAG_BITEXACT) {
1122 struct AVSHA *sha = av_sha_alloc();
1125 return AVERROR(ENOMEM);
1126 av_sha_init(sha, 160);
1127 av_sha_update(sha, st->codec->extradata, st->codec->extradata_size);
1128 av_sha_final(sha, digest);
1130 fileuid = AV_RL64(digest);
1132 fileuid = av_lfg_get(&c);
1134 av_log(s, AV_LOG_VERBOSE, "Using %.16"PRIx64" for attachment %d\n",
1137 put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype);
1138 put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codec->extradata, st->codec->extradata_size);
1139 put_ebml_uint(pb, MATROSKA_ID_FILEUID, fileuid);
1140 end_ebml_master(pb, attached_file);
1142 end_ebml_master(pb, attachments);
1147 static int mkv_write_header(AVFormatContext *s)
1149 MatroskaMuxContext *mkv = s->priv_data;
1150 AVIOContext *pb = s->pb;
1151 ebml_master ebml_header, segment_info;
1152 AVDictionaryEntry *tag;
1153 int ret, i, version = 2;
1155 if (!strcmp(s->oformat->name, "webm")) mkv->mode = MODE_WEBM;
1156 else mkv->mode = MODE_MATROSKAv2;
1158 if (s->avoid_negative_ts < 0)
1159 s->avoid_negative_ts = 1;
1161 if (mkv->mode != MODE_WEBM ||
1162 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1163 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1166 for (i = 0; i < s->nb_streams; i++) {
1167 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_ATRAC3 ||
1168 s->streams[i]->codec->codec_id == AV_CODEC_ID_COOK ||
1169 s->streams[i]->codec->codec_id == AV_CODEC_ID_RA_288 ||
1170 s->streams[i]->codec->codec_id == AV_CODEC_ID_SIPR ||
1171 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV10 ||
1172 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV20) {
1173 av_log(s, AV_LOG_ERROR,
1174 "The Matroska muxer does not yet support muxing %s\n",
1175 avcodec_get_name(s->streams[i]->codec->codec_id));
1176 return AVERROR_PATCHWELCOME;
1178 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_OPUS ||
1179 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1180 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1184 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1186 return AVERROR(ENOMEM);
1188 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1189 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1190 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1191 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1192 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1193 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1194 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1195 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1196 end_ebml_master(pb, ebml_header);
1198 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1199 mkv->segment_offset = avio_tell(pb);
1201 // we write 2 seek heads - one at the end of the file to point to each
1202 // cluster, and one at the beginning to point to all other level one
1203 // elements (including the seek head at the end of the file), which
1204 // isn't more than 10 elements if we only write one of each other
1205 // currently defined level 1 element
1206 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1207 if (!mkv->main_seekhead)
1208 return AVERROR(ENOMEM);
1210 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1211 if (ret < 0) return ret;
1213 segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
1214 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1215 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1216 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1217 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1218 uint32_t segment_uid[4];
1221 av_lfg_init(&lfg, av_get_random_seed());
1223 for (i = 0; i < 4; i++)
1224 segment_uid[i] = av_lfg_get(&lfg);
1226 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , LIBAVFORMAT_IDENT);
1227 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1228 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1230 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1231 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1233 const char *ident = "Lavf";
1234 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1235 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1238 if (tag = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
1239 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1240 int64_t date_utc = (ff_iso8601_to_unix_time(tag->value) - 978307200) * 1000000000;
1241 uint8_t date_utc_buf[8];
1242 AV_WB64(date_utc_buf, date_utc);
1243 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1246 // reserve space for the duration
1248 mkv->duration_offset = avio_tell(pb);
1249 put_ebml_void(pb, 11); // assumes double-precision float to be written
1250 end_ebml_master(pb, segment_info);
1252 ret = mkv_write_tracks(s);
1253 if (ret < 0) return ret;
1255 for (i = 0; i < s->nb_chapters; i++)
1256 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1258 if (mkv->mode != MODE_WEBM) {
1259 ret = mkv_write_chapters(s);
1260 if (ret < 0) return ret;
1262 ret = mkv_write_tags(s);
1263 if (ret < 0) return ret;
1265 ret = mkv_write_attachments(s);
1266 if (ret < 0) return ret;
1269 if (!s->pb->seekable)
1270 mkv_write_seekhead(pb, mkv->main_seekhead);
1272 mkv->cues = mkv_start_cues(mkv->segment_offset);
1273 if (mkv->cues == NULL)
1274 return AVERROR(ENOMEM);
1276 if (pb->seekable && mkv->reserve_cues_space) {
1277 mkv->cues_pos = avio_tell(pb);
1278 put_ebml_void(pb, mkv->reserve_cues_space);
1281 av_init_packet(&mkv->cur_audio_pkt);
1282 mkv->cur_audio_pkt.size = 0;
1283 mkv->cluster_pos = -1;
1287 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1288 // after 4k and on a keyframe
1290 if (mkv->cluster_time_limit < 0)
1291 mkv->cluster_time_limit = 5000;
1292 if (mkv->cluster_size_limit < 0)
1293 mkv->cluster_size_limit = 5 * 1024 * 1024;
1295 if (mkv->cluster_time_limit < 0)
1296 mkv->cluster_time_limit = 1000;
1297 if (mkv->cluster_size_limit < 0)
1298 mkv->cluster_size_limit = 32 * 1024;
1304 static int mkv_blockgroup_size(int pkt_size)
1306 int size = pkt_size + 4;
1307 size += ebml_num_size(size);
1308 size += 2; // EBML ID for block and block duration
1309 size += 8; // max size of block duration
1310 size += ebml_num_size(size);
1311 size += 1; // blockgroup EBML ID
1315 static int ass_get_duration(const uint8_t *p)
1317 int sh, sm, ss, sc, eh, em, es, ec;
1318 uint64_t start, end;
1320 if (sscanf(p, "%*[^,],%d:%d:%d%*c%d,%d:%d:%d%*c%d",
1321 &sh, &sm, &ss, &sc, &eh, &em, &es, &ec) != 8)
1323 start = 3600000LL*sh + 60000LL*sm + 1000LL*ss + 10LL*sc;
1324 end = 3600000LL*eh + 60000LL*em + 1000LL*es + 10LL*ec;
1329 /* Writes the contents of pkt to a block, using the data starting at *datap.
1330 * If pkt corresponds to more than one block, this writes the contents of the first block
1331 * (starting from *datap) and updates *datap so it points to the beginning of the data
1332 * corresponding to the next block.
1334 static int mkv_write_ass_block(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt, uint8_t **datap)
1336 MatroskaMuxContext *mkv = s->priv_data;
1337 int i, layer = 0, size, line_size, data_size = pkt->size - (*datap - pkt->data);
1338 uint8_t *start, *end, *data = *datap;
1339 ebml_master blockgroup;
1342 int duration = ass_get_duration(data);
1343 end = memchr(data, '\n', data_size);
1344 size = line_size = end ? end-data+1 : data_size;
1345 size -= end ? (end[-1]=='\r')+1 : 0;
1347 for (i=0; i<3; i++, start++)
1348 if (!(start = memchr(start, ',', size-(start-data))))
1350 size -= start - data;
1351 sscanf(data, "Dialogue: %d,", &layer);
1352 i = snprintf(buffer, sizeof(buffer), "%"PRId64",%d,",
1353 s->streams[pkt->stream_index]->nb_frames, layer);
1354 size = FFMIN(i+size, sizeof(buffer));
1355 memcpy(buffer+i, start, size-i);
1357 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1358 "pts %" PRId64 ", duration %d\n",
1359 avio_tell(pb), size, pkt->pts, duration);
1360 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1361 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1362 put_ebml_num(pb, size+4, 0);
1363 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1364 avio_wb16(pb, pkt->pts - mkv->cluster_pts);
1366 avio_write(pb, buffer, size);
1367 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1368 end_ebml_master(pb, blockgroup);
1370 *datap += line_size;
1376 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1383 dst = av_malloc(srclen);
1385 return AVERROR(ENOMEM);
1387 while (srclen >= WV_HEADER_SIZE) {
1390 ret = ff_wv_parse_header(&header, src);
1393 src += WV_HEADER_SIZE;
1394 srclen -= WV_HEADER_SIZE;
1396 if (srclen < header.blocksize) {
1397 ret = AVERROR_INVALIDDATA;
1401 if (header.initial) {
1402 AV_WL32(dst + offset, header.samples);
1405 AV_WL32(dst + offset, header.flags);
1406 AV_WL32(dst + offset + 4, header.crc);
1409 if (!(header.initial && header.final)) {
1410 AV_WL32(dst + offset, header.blocksize);
1414 memcpy(dst + offset, src, header.blocksize);
1415 src += header.blocksize;
1416 srclen -= header.blocksize;
1417 offset += header.blocksize;
1429 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1430 unsigned int blockid, AVPacket *pkt, int flags)
1432 MatroskaMuxContext *mkv = s->priv_data;
1433 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1434 uint8_t *data = NULL, *side_data = NULL;
1435 int offset = 0, size = pkt->size, side_data_size = 0;
1436 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1437 uint64_t additional_id = 0;
1438 int64_t discard_padding = 0;
1439 ebml_master block_group, block_additions, block_more;
1441 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1442 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1443 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, flags);
1444 if (codec->codec_id == AV_CODEC_ID_H264 && codec->extradata_size > 0 &&
1445 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1446 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1447 else if (codec->codec_id == AV_CODEC_ID_HEVC && codec->extradata_size > 6 &&
1448 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1449 /* extradata is Annex B, assume the bitstream is too and convert it */
1450 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1451 else if (codec->codec_id == AV_CODEC_ID_WAVPACK) {
1452 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
1454 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
1460 if (codec->codec_id == AV_CODEC_ID_PRORES) {
1461 /* Matroska specification requires to remove the first QuickTime atom
1467 side_data = av_packet_get_side_data(pkt,
1468 AV_PKT_DATA_SKIP_SAMPLES,
1471 if (side_data && side_data_size >= 10) {
1472 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
1473 (AVRational){1, codec->sample_rate},
1474 (AVRational){1, 1000000000});
1477 side_data = av_packet_get_side_data(pkt,
1478 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
1481 additional_id = AV_RB64(side_data);
1483 side_data_size -= 8;
1486 if ((side_data_size && additional_id == 1) || discard_padding) {
1487 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
1488 blockid = MATROSKA_ID_BLOCK;
1491 put_ebml_id(pb, blockid);
1492 put_ebml_num(pb, size+4, 0);
1493 // this assumes stream_index is less than 126
1494 avio_w8(pb, 0x80 | (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1)));
1495 avio_wb16(pb, ts - mkv->cluster_pts);
1497 avio_write(pb, data + offset, size);
1498 if (data != pkt->data)
1501 if (discard_padding) {
1502 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
1505 if (side_data_size && additional_id == 1) {
1506 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
1507 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
1508 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
1509 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
1510 put_ebml_num(pb, side_data_size, 0);
1511 avio_write(pb, side_data, side_data_size);
1512 end_ebml_master(pb, block_more);
1513 end_ebml_master(pb, block_additions);
1515 if ((side_data_size && additional_id == 1) || discard_padding) {
1516 end_ebml_master(pb, block_group);
1520 static int srt_get_duration(uint8_t **buf)
1522 int i, duration = 0;
1524 for (i=0; i<2 && !duration; i++) {
1525 int s_hour, s_min, s_sec, s_hsec, e_hour, e_min, e_sec, e_hsec;
1526 if (sscanf(*buf, "%d:%2d:%2d%*1[,.]%3d --> %d:%2d:%2d%*1[,.]%3d",
1527 &s_hour, &s_min, &s_sec, &s_hsec,
1528 &e_hour, &e_min, &e_sec, &e_hsec) == 8) {
1529 s_min += 60*s_hour; e_min += 60*e_hour;
1530 s_sec += 60*s_min; e_sec += 60*e_min;
1531 s_hsec += 1000*s_sec; e_hsec += 1000*e_sec;
1532 duration = e_hsec - s_hsec;
1534 *buf += ff_subtitles_next_line(*buf);
1539 static int mkv_write_srt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1541 ebml_master blockgroup;
1542 AVPacket pkt2 = *pkt;
1543 int64_t duration = srt_get_duration(&pkt2.data);
1544 pkt2.size -= pkt2.data - pkt->data;
1546 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1547 mkv_blockgroup_size(pkt2.size));
1548 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, &pkt2, 0);
1549 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1550 end_ebml_master(pb, blockgroup);
1555 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1557 MatroskaMuxContext *mkv = s->priv_data;
1558 ebml_master blockgroup;
1559 int id_size, settings_size, size;
1560 uint8_t *id, *settings;
1561 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1562 const int flags = 0;
1565 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
1569 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
1572 size = id_size + 1 + settings_size + 1 + pkt->size;
1574 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1575 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1576 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
1578 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1580 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1581 put_ebml_num(pb, size+4, 0);
1582 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1583 avio_wb16(pb, ts - mkv->cluster_pts);
1585 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
1587 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
1588 end_ebml_master(pb, blockgroup);
1590 return pkt->duration;
1593 static void mkv_flush_dynbuf(AVFormatContext *s)
1595 MatroskaMuxContext *mkv = s->priv_data;
1602 bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
1603 avio_write(s->pb, dyn_buf, bufsize);
1608 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
1610 MatroskaMuxContext *mkv = s->priv_data;
1611 AVIOContext *pb = s->pb;
1612 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1613 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1614 int duration = pkt->duration;
1616 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1617 int64_t relative_packet_pos;
1618 uint8_t *data_offset = pkt->data;
1619 int dash_tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
1621 if (ts == AV_NOPTS_VALUE) {
1622 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
1623 return AVERROR(EINVAL);
1625 ts += mkv->tracks[pkt->stream_index].ts_offset;
1627 if (!s->pb->seekable) {
1629 if ((ret = avio_open_dyn_buf(&mkv->dyn_bc)) < 0) {
1630 av_log(s, AV_LOG_ERROR, "Failed to open dynamic buffer\n");
1637 if (mkv->cluster_pos == -1) {
1638 mkv->cluster_pos = avio_tell(s->pb);
1639 mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
1640 put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
1641 mkv->cluster_pts = FFMAX(0, ts);
1644 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1646 if (codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1647 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe << 7);
1648 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe) {
1649 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
1650 if (ret < 0) return ret;
1653 } else if (codec->codec_id == AV_CODEC_ID_SSA) {
1654 while (data_offset < pkt->data + pkt->size) {
1655 duration = mkv_write_ass_block(s, pb, pkt, &data_offset);
1656 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, duration);
1657 if (ret < 0) return ret;
1658 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1662 if (codec->codec_id == AV_CODEC_ID_SRT) {
1663 duration = mkv_write_srt_blocks(s, pb, pkt);
1664 } else if (codec->codec_id == AV_CODEC_ID_WEBVTT) {
1665 duration = mkv_write_vtt_blocks(s, pb, pkt);
1667 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(pkt->size));
1668 /* For backward compatibility, prefer convergence_duration. */
1669 if (pkt->convergence_duration > 0) {
1670 duration = pkt->convergence_duration;
1672 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 0);
1673 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1674 end_ebml_master(pb, blockgroup);
1677 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, duration);
1678 if (ret < 0) return ret;
1681 mkv->duration = FFMAX(mkv->duration, ts + duration);
1685 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
1687 MatroskaMuxContext *mkv = s->priv_data;
1688 int codec_type = s->streams[pkt->stream_index]->codec->codec_type;
1689 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1691 int64_t cluster_time;
1694 int start_new_cluster;
1696 if (mkv->tracks[pkt->stream_index].write_dts)
1697 cluster_time = pkt->dts - mkv->cluster_pts;
1699 cluster_time = pkt->pts - mkv->cluster_pts;
1700 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
1702 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1703 // after 4k and on a keyframe
1704 if (s->pb->seekable) {
1706 cluster_size = avio_tell(pb) - mkv->cluster_pos;
1709 cluster_size = avio_tell(pb);
1712 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
1713 // WebM DASH specification states that the first block of every cluster
1714 // has to be a key frame. So for DASH video, we only create a cluster
1715 // on seeing key frames.
1716 start_new_cluster = keyframe;
1717 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
1718 cluster_time > mkv->cluster_time_limit) {
1719 // For DASH audio, we create a Cluster based on cluster_time_limit
1720 start_new_cluster = 1;
1721 } else if (!mkv->is_dash &&
1722 (cluster_size > mkv->cluster_size_limit ||
1723 cluster_time > mkv->cluster_time_limit ||
1724 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
1725 cluster_size > 4 * 1024))) {
1726 start_new_cluster = 1;
1728 start_new_cluster = 0;
1731 if (mkv->cluster_pos != -1 && start_new_cluster) {
1732 av_log(s, AV_LOG_DEBUG, "Starting new cluster at offset %" PRIu64
1733 " bytes, pts %" PRIu64 "dts %" PRIu64 "\n",
1734 avio_tell(pb), pkt->pts, pkt->dts);
1735 end_ebml_master(pb, mkv->cluster);
1736 mkv->cluster_pos = -1;
1738 mkv_flush_dynbuf(s);
1742 // check if we have an audio packet cached
1743 if (mkv->cur_audio_pkt.size > 0) {
1744 // for DASH audio, a CuePoint has to be added when there is a new cluster.
1745 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
1746 mkv->is_dash ? start_new_cluster : 0);
1747 av_free_packet(&mkv->cur_audio_pkt);
1749 av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret);
1754 // buffer an audio packet to ensure the packet containing the video
1755 // keyframe's timecode is contained in the same cluster for WebM
1756 if (codec_type == AVMEDIA_TYPE_AUDIO) {
1757 mkv->cur_audio_pkt = *pkt;
1759 mkv->cur_audio_pkt.buf = av_buffer_ref(pkt->buf);
1760 ret = mkv->cur_audio_pkt.buf ? 0 : AVERROR(ENOMEM);
1762 ret = av_dup_packet(&mkv->cur_audio_pkt);
1763 if (mkv->cur_audio_pkt.side_data_elems > 0) {
1764 ret = av_copy_packet_side_data(&mkv->cur_audio_pkt, &mkv->cur_audio_pkt);
1767 ret = mkv_write_packet_internal(s, pkt, 0);
1771 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
1773 MatroskaMuxContext *mkv = s->priv_data;
1775 if (s->pb->seekable)
1780 if (mkv->cluster_pos != -1) {
1781 av_log(s, AV_LOG_DEBUG, "Flushing cluster at offset %" PRIu64
1782 " bytes\n", avio_tell(pb));
1783 end_ebml_master(pb, mkv->cluster);
1784 mkv->cluster_pos = -1;
1786 mkv_flush_dynbuf(s);
1791 return mkv_write_packet(s, pkt);
1794 static int mkv_write_trailer(AVFormatContext *s)
1796 MatroskaMuxContext *mkv = s->priv_data;
1797 AVIOContext *pb = s->pb;
1798 int64_t currentpos, cuespos;
1801 // check if we have an audio packet cached
1802 if (mkv->cur_audio_pkt.size > 0) {
1803 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
1804 av_free_packet(&mkv->cur_audio_pkt);
1806 av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret);
1812 end_ebml_master(mkv->dyn_bc, mkv->cluster);
1813 mkv_flush_dynbuf(s);
1814 } else if (mkv->cluster_pos != -1) {
1815 end_ebml_master(pb, mkv->cluster);
1818 if (mkv->mode != MODE_WEBM) {
1819 ret = mkv_write_chapters(s);
1820 if (ret < 0) return ret;
1824 if (mkv->cues->num_entries) {
1825 if (mkv->reserve_cues_space) {
1828 currentpos = avio_tell(pb);
1829 avio_seek(pb, mkv->cues_pos, SEEK_SET);
1831 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
1832 cues_end = avio_tell(pb);
1833 if (cues_end > cuespos + mkv->reserve_cues_space) {
1834 av_log(s, AV_LOG_ERROR, "Insufficient space reserved for cues: %d "
1835 "(needed: %"PRId64").\n", mkv->reserve_cues_space,
1836 cues_end - cuespos);
1837 return AVERROR(EINVAL);
1840 if (cues_end < cuespos + mkv->reserve_cues_space)
1841 put_ebml_void(pb, mkv->reserve_cues_space - (cues_end - cuespos));
1843 avio_seek(pb, currentpos, SEEK_SET);
1845 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
1848 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES, cuespos);
1849 if (ret < 0) return ret;
1852 mkv_write_seekhead(pb, mkv->main_seekhead);
1854 // update the duration
1855 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
1856 currentpos = avio_tell(pb);
1857 avio_seek(pb, mkv->duration_offset, SEEK_SET);
1858 put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
1860 avio_seek(pb, currentpos, SEEK_SET);
1863 end_ebml_master(pb, mkv->segment);
1864 av_freep(&mkv->tracks);
1865 av_freep(&mkv->cues->entries);
1866 av_freep(&mkv->cues);
1871 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
1874 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
1875 if (ff_mkv_codec_tags[i].id == codec_id)
1878 if (std_compliance < FF_COMPLIANCE_NORMAL) { // mkv theoretically supports any
1879 enum AVMediaType type = avcodec_get_type(codec_id); // video/audio through VFW/ACM
1880 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
1887 static const AVCodecTag additional_audio_tags[] = {
1888 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
1889 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
1890 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
1891 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
1892 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
1893 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
1894 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
1895 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
1896 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
1897 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
1898 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
1899 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
1900 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
1903 static const AVCodecTag additional_video_tags[] = {
1904 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
1905 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
1906 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
1907 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
1908 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
1909 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
1912 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
1913 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
1914 static const AVOption options[] = {
1915 { "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 },
1916 { "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 },
1917 { "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 },
1918 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
1919 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
1923 #if CONFIG_MATROSKA_MUXER
1924 static const AVClass matroska_class = {
1925 .class_name = "matroska muxer",
1926 .item_name = av_default_item_name,
1928 .version = LIBAVUTIL_VERSION_INT,
1931 AVOutputFormat ff_matroska_muxer = {
1933 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
1934 .mime_type = "video/x-matroska",
1935 .extensions = "mkv",
1936 .priv_data_size = sizeof(MatroskaMuxContext),
1937 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
1938 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
1939 .video_codec = CONFIG_LIBX264_ENCODER ?
1940 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
1941 .write_header = mkv_write_header,
1942 .write_packet = mkv_write_flush_packet,
1943 .write_trailer = mkv_write_trailer,
1944 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
1945 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
1946 .codec_tag = (const AVCodecTag* const []){
1947 ff_codec_bmp_tags, ff_codec_wav_tags,
1948 additional_audio_tags, additional_video_tags, 0
1951 .subtitle_codec = AV_CODEC_ID_SSA,
1953 .subtitle_codec = AV_CODEC_ID_ASS,
1955 .query_codec = mkv_query_codec,
1956 .priv_class = &matroska_class,
1960 #if CONFIG_WEBM_MUXER
1961 static const AVClass webm_class = {
1962 .class_name = "webm muxer",
1963 .item_name = av_default_item_name,
1965 .version = LIBAVUTIL_VERSION_INT,
1968 AVOutputFormat ff_webm_muxer = {
1970 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
1971 .mime_type = "video/webm",
1972 .extensions = "webm",
1973 .priv_data_size = sizeof(MatroskaMuxContext),
1974 .audio_codec = AV_CODEC_ID_VORBIS,
1975 .video_codec = AV_CODEC_ID_VP8,
1976 .subtitle_codec = AV_CODEC_ID_WEBVTT,
1977 .write_header = mkv_write_header,
1978 .write_packet = mkv_write_flush_packet,
1979 .write_trailer = mkv_write_trailer,
1980 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
1981 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
1982 .priv_class = &webm_class,
1986 #if CONFIG_MATROSKA_AUDIO_MUXER
1987 static const AVClass mka_class = {
1988 .class_name = "matroska audio muxer",
1989 .item_name = av_default_item_name,
1991 .version = LIBAVUTIL_VERSION_INT,
1993 AVOutputFormat ff_matroska_audio_muxer = {
1995 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
1996 .mime_type = "audio/x-matroska",
1997 .extensions = "mka",
1998 .priv_data_size = sizeof(MatroskaMuxContext),
1999 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2000 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2001 .video_codec = AV_CODEC_ID_NONE,
2002 .write_header = mkv_write_header,
2003 .write_packet = mkv_write_flush_packet,
2004 .write_trailer = mkv_write_trailer,
2005 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2007 .codec_tag = (const AVCodecTag* const []){
2008 ff_codec_wav_tags, additional_audio_tags, 0
2010 .priv_class = &mka_class,