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->extradata, codec->extradata_size,
524 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
525 "Lavf" : LIBAVFORMAT_IDENT;
526 AVDictionary *dict = NULL;
527 uint8_t buf[32], *data, *p;
530 snprintf(buf, sizeof(buf), "0x%"PRIx64, codec->channel_layout);
531 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
533 len = ff_vorbiscomment_length(dict, vendor);
534 data = av_malloc(len + 4);
537 return AVERROR(ENOMEM);
541 AV_WB24(data + 1, len);
544 ff_vorbiscomment_write(&p, &dict, vendor);
546 avio_write(pb, data, len + 4);
555 static void get_aac_sample_rates(AVFormatContext *s, AVCodecContext *codec, int *sample_rate, int *output_sample_rate)
557 MPEG4AudioConfig mp4ac;
559 if (avpriv_mpeg4audio_get_config(&mp4ac, codec->extradata,
560 codec->extradata_size * 8, 1) < 0) {
561 av_log(s, AV_LOG_WARNING, "Error parsing AAC extradata, unable to determine samplerate.\n");
565 *sample_rate = mp4ac.sample_rate;
566 *output_sample_rate = mp4ac.ext_sample_rate;
569 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec, int native_id, int qt_id)
573 int ret, codecpriv_size;
575 ret = avio_open_dyn_buf(&dyn_cp);
580 if (codec->codec_id == AV_CODEC_ID_VORBIS || codec->codec_id == AV_CODEC_ID_THEORA)
581 ret = put_xiph_codecpriv(s, dyn_cp, codec);
582 else if (codec->codec_id == AV_CODEC_ID_FLAC)
583 ret = put_flac_codecpriv(s, dyn_cp, codec);
584 else if (codec->codec_id == AV_CODEC_ID_WAVPACK)
585 ret = put_wv_codecpriv(dyn_cp, codec);
586 else if (codec->codec_id == AV_CODEC_ID_H264)
587 ret = ff_isom_write_avcc(dyn_cp, codec->extradata, codec->extradata_size);
588 else if (codec->codec_id == AV_CODEC_ID_HEVC)
589 ret = ff_isom_write_hvcc(dyn_cp, codec->extradata, codec->extradata_size, 0);
590 else if (codec->codec_id == AV_CODEC_ID_ALAC) {
591 if (codec->extradata_size < 36) {
592 av_log(s, AV_LOG_ERROR,
593 "Invalid extradata found, ALAC expects a 36-byte "
595 ret = AVERROR_INVALIDDATA;
597 avio_write(dyn_cp, codec->extradata + 12,
598 codec->extradata_size - 12);
599 } else if (codec->codec_id == AV_CODEC_ID_PRORES &&
600 ff_codec_get_id(ff_codec_movvideo_tags, codec->codec_tag) == AV_CODEC_ID_PRORES) {
601 avio_wl32(dyn_cp, codec->codec_tag);
603 else if (codec->extradata_size && codec->codec_id != AV_CODEC_ID_TTA)
604 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
605 } else if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
607 if (!codec->codec_tag)
608 codec->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags, codec->codec_id);
609 if (codec->extradata_size) {
610 if ( ff_codec_get_id(ff_codec_movvideo_tags, codec->codec_tag) == codec->codec_id
611 && ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(codec->extradata+4)) != codec->codec_id
614 avio_wb32(dyn_cp, 0x5a + codec->extradata_size);
615 avio_wl32(dyn_cp, codec->codec_tag);
616 for(i=0; i<0x5a-8; i++)
619 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
622 if (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id))
623 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
624 avcodec_get_name(codec->codec_id));
626 if (!codec->codec_tag)
627 codec->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id);
628 if (!codec->codec_tag) {
629 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
630 avcodec_get_name(codec->codec_id));
631 ret = AVERROR(EINVAL);
634 ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0, 0);
637 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
639 tag = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id);
641 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
642 avcodec_get_name(codec->codec_id));
643 ret = AVERROR(EINVAL);
645 if (!codec->codec_tag)
646 codec->codec_tag = tag;
648 ff_put_wav_header(dyn_cp, codec, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
651 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
653 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv, codecpriv_size);
658 static int mkv_write_tracks(AVFormatContext *s)
660 MatroskaMuxContext *mkv = s->priv_data;
661 AVIOContext *pb = s->pb;
663 int i, j, ret, default_stream_exists = 0;
665 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
666 if (ret < 0) return ret;
668 tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
669 for (i = 0; i < s->nb_streams; i++) {
670 AVStream *st = s->streams[i];
671 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
673 for (i = 0; i < s->nb_streams; i++) {
674 AVStream *st = s->streams[i];
675 AVCodecContext *codec = st->codec;
676 ebml_master subinfo, track;
679 int bit_depth = av_get_bits_per_sample(codec->codec_id);
680 int sample_rate = codec->sample_rate;
681 int output_sample_rate = 0;
682 int display_width_div = 1;
683 int display_height_div = 1;
684 AVDictionaryEntry *tag;
686 // ms precision is the de-facto standard timescale for mkv files
687 avpriv_set_pts_info(st, 64, 1, 1000);
689 if (codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
690 mkv->have_attachments = 1;
694 if (!bit_depth && codec->codec_id != AV_CODEC_ID_ADPCM_G726)
695 bit_depth = av_get_bytes_per_sample(codec->sample_fmt) << 3;
697 bit_depth = codec->bits_per_coded_sample;
699 if (codec->codec_id == AV_CODEC_ID_AAC)
700 get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate);
702 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
703 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
704 mkv->is_dash ? mkv->dash_track_number : i + 1);
705 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
706 mkv->is_dash ? mkv->dash_track_number : i + 1);
707 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
709 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
710 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
711 tag = av_dict_get(st->metadata, "language", NULL, 0);
712 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
713 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag ? tag->value:"und");
714 } else if (tag && tag->value) {
715 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
718 // The default value for TRACKFLAGDEFAULT is 1, so add element
719 // if we need to clear it.
720 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
721 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
723 if (st->disposition & AV_DISPOSITION_FORCED)
724 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
726 if (mkv->mode == MODE_WEBM && codec->codec_id == AV_CODEC_ID_WEBVTT) {
727 const char *codec_id;
728 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
729 codec_id = "D_WEBVTT/CAPTIONS";
730 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
731 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
732 codec_id = "D_WEBVTT/DESCRIPTIONS";
733 native_id = MATROSKA_TRACK_TYPE_METADATA;
734 } else if (st->disposition & AV_DISPOSITION_METADATA) {
735 codec_id = "D_WEBVTT/METADATA";
736 native_id = MATROSKA_TRACK_TYPE_METADATA;
738 codec_id = "D_WEBVTT/SUBTITLES";
739 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
741 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
743 // look for a codec ID string specific to mkv to use,
744 // if none are found, use AVI codes
745 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
746 if (ff_mkv_codec_tags[j].id == codec->codec_id) {
747 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
754 if (codec->codec_type == AVMEDIA_TYPE_AUDIO && codec->delay && codec->codec_id == AV_CODEC_ID_OPUS) {
755 // mkv->tracks[i].ts_offset = av_rescale_q(codec->delay,
756 // (AVRational){ 1, codec->sample_rate },
759 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY,
760 av_rescale_q(codec->delay, (AVRational){ 1, codec->sample_rate },
761 (AVRational){ 1, 1000000000 }));
763 if (codec->codec_id == AV_CODEC_ID_OPUS) {
764 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
767 if (mkv->mode == MODE_WEBM && !(codec->codec_id == AV_CODEC_ID_VP8 ||
768 codec->codec_id == AV_CODEC_ID_VP9 ||
769 codec->codec_id == AV_CODEC_ID_OPUS ||
770 codec->codec_id == AV_CODEC_ID_VORBIS ||
771 codec->codec_id == AV_CODEC_ID_WEBVTT)) {
772 av_log(s, AV_LOG_ERROR,
773 "Only VP8 or VP9 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
774 return AVERROR(EINVAL);
777 switch (codec->codec_type) {
778 case AVMEDIA_TYPE_VIDEO:
779 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
781 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
782 && 1.0/av_q2d(st->avg_frame_rate) > av_q2d(codec->time_base))
783 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1E9 / av_q2d(st->avg_frame_rate));
785 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, av_q2d(codec->time_base)*1E9);
788 ff_codec_get_tag(ff_codec_movvideo_tags, codec->codec_id) &&
789 (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id)
790 || codec->codec_id == AV_CODEC_ID_SVQ1
791 || codec->codec_id == AV_CODEC_ID_SVQ3
792 || codec->codec_id == AV_CODEC_ID_CINEPAK))
796 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
797 else if (!native_id) {
798 // if there is no mkv-specific codec ID, use VFW mode
799 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
800 mkv->tracks[i].write_dts = 1;
803 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
804 // XXX: interlace flag?
805 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , codec->width);
806 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, codec->height);
808 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
809 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
810 // save stereo mode flag
811 uint64_t st_mode = MATROSKA_VIDEO_STEREO_MODE_COUNT;
813 for (j=0; j<MATROSKA_VIDEO_STEREO_MODE_COUNT; j++)
814 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[j])){
819 if ((mkv->mode == MODE_WEBM && st_mode > 3 && st_mode != 11)
820 || st_mode >= MATROSKA_VIDEO_STEREO_MODE_COUNT) {
821 av_log(s, AV_LOG_ERROR,
822 "The specified stereo mode is not valid.\n");
823 return AVERROR(EINVAL);
825 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, st_mode);
832 display_width_div = 2;
838 display_height_div = 2;
843 if ((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) ||
844 (tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) ||
845 (codec->pix_fmt == AV_PIX_FMT_YUVA420P)) {
846 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
849 if (st->sample_aspect_ratio.num) {
850 int64_t d_width = av_rescale(codec->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
851 if (d_width > INT_MAX) {
852 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
853 return AVERROR(EINVAL);
855 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
856 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
857 } else if (display_width_div != 1 || display_height_div != 1) {
858 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , codec->width / display_width_div);
859 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
862 if (codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
863 uint32_t color_space = av_le2ne32(codec->codec_tag);
864 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
866 end_ebml_master(pb, subinfo);
869 case AVMEDIA_TYPE_AUDIO:
870 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
873 // no mkv-specific ID, use ACM mode
874 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
876 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
877 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , codec->channels);
878 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
879 if (output_sample_rate)
880 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
882 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
883 end_ebml_master(pb, subinfo);
886 case AVMEDIA_TYPE_SUBTITLE:
888 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", codec->codec_id);
889 return AVERROR(ENOSYS);
892 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT)
893 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
895 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
898 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
899 return AVERROR(EINVAL);
902 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
903 ret = mkv_write_codecprivate(s, pb, codec, native_id, qt_id);
904 if (ret < 0) return ret;
907 end_ebml_master(pb, track);
909 end_ebml_master(pb, tracks);
913 static int mkv_write_chapters(AVFormatContext *s)
915 MatroskaMuxContext *mkv = s->priv_data;
916 AVIOContext *pb = s->pb;
917 ebml_master chapters, editionentry;
918 AVRational scale = {1, 1E9};
921 if (!s->nb_chapters || mkv->wrote_chapters)
924 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
925 if (ret < 0) return ret;
927 chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
928 editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
929 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
930 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
931 for (i = 0; i < s->nb_chapters; i++) {
932 ebml_master chapteratom, chapterdisplay;
933 AVChapter *c = s->chapters[i];
934 AVDictionaryEntry *t = NULL;
936 chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
937 put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
938 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART,
939 av_rescale_q(c->start, c->time_base, scale));
940 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND,
941 av_rescale_q(c->end, c->time_base, scale));
942 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
943 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
944 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
945 chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
946 put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
947 put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und");
948 end_ebml_master(pb, chapterdisplay);
950 end_ebml_master(pb, chapteratom);
952 end_ebml_master(pb, editionentry);
953 end_ebml_master(pb, chapters);
955 mkv->wrote_chapters = 1;
959 static void mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
961 uint8_t *key = av_strdup(t->key);
963 const uint8_t *lang = NULL;
966 if ((p = strrchr(p, '-')) &&
967 (lang = av_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
974 else if (*p >= 'a' && *p <= 'z')
979 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
980 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
982 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
983 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
984 end_ebml_master(pb, tag);
989 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
990 unsigned int uid, ebml_master *tags)
992 MatroskaMuxContext *mkv = s->priv_data;
993 ebml_master tag, targets;
994 AVDictionaryEntry *t = NULL;
998 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
999 if (ret < 0) return ret;
1001 *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
1004 tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
1005 targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
1007 put_ebml_uint(s->pb, elementid, uid);
1008 end_ebml_master(s->pb, targets);
1010 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1011 if (av_strcasecmp(t->key, "title") &&
1012 av_strcasecmp(t->key, "stereo_mode") &&
1013 av_strcasecmp(t->key, "encoding_tool"))
1014 mkv_write_simpletag(s->pb, t);
1016 end_ebml_master(s->pb, tag);
1020 static int mkv_check_tag(AVDictionary *m)
1022 AVDictionaryEntry *t = NULL;
1024 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1025 if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode"))
1031 static int mkv_write_tags(AVFormatContext *s)
1033 MatroskaMuxContext *mkv = s->priv_data;
1034 ebml_master tags = {0};
1037 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1039 if (mkv_check_tag(s->metadata)) {
1040 ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
1041 if (ret < 0) return ret;
1044 for (i = 0; i < s->nb_streams; i++) {
1045 AVStream *st = s->streams[i];
1047 if (!mkv_check_tag(st->metadata))
1050 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
1051 if (ret < 0) return ret;
1054 for (i = 0; i < s->nb_chapters; i++) {
1055 AVChapter *ch = s->chapters[i];
1057 if (!mkv_check_tag(ch->metadata))
1060 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &tags);
1061 if (ret < 0) return ret;
1065 end_ebml_master(s->pb, tags);
1069 static int mkv_write_attachments(AVFormatContext *s)
1071 MatroskaMuxContext *mkv = s->priv_data;
1072 AVIOContext *pb = s->pb;
1073 ebml_master attachments;
1077 if (!mkv->have_attachments)
1080 av_lfg_init(&c, av_get_random_seed());
1082 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1083 if (ret < 0) return ret;
1085 attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0);
1087 for (i = 0; i < s->nb_streams; i++) {
1088 AVStream *st = s->streams[i];
1089 ebml_master attached_file;
1090 AVDictionaryEntry *t;
1091 const char *mimetype = NULL;
1094 if (st->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1097 attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0);
1099 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1100 put_ebml_string(pb, MATROSKA_ID_FILEDESC, t->value);
1101 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1102 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1103 return AVERROR(EINVAL);
1105 put_ebml_string(pb, MATROSKA_ID_FILENAME, t->value);
1106 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1107 mimetype = t->value;
1108 else if (st->codec->codec_id != AV_CODEC_ID_NONE ) {
1110 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1111 if (ff_mkv_mime_tags[i].id == st->codec->codec_id) {
1112 mimetype = ff_mkv_mime_tags[i].str;
1117 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1118 "it cannot be deduced from the codec id.\n", i);
1119 return AVERROR(EINVAL);
1122 if (s->flags & AVFMT_FLAG_BITEXACT) {
1123 struct AVSHA *sha = av_sha_alloc();
1126 return AVERROR(ENOMEM);
1127 av_sha_init(sha, 160);
1128 av_sha_update(sha, st->codec->extradata, st->codec->extradata_size);
1129 av_sha_final(sha, digest);
1131 fileuid = AV_RL64(digest);
1133 fileuid = av_lfg_get(&c);
1135 av_log(s, AV_LOG_VERBOSE, "Using %.16"PRIx64" for attachment %d\n",
1138 put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype);
1139 put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codec->extradata, st->codec->extradata_size);
1140 put_ebml_uint(pb, MATROSKA_ID_FILEUID, fileuid);
1141 end_ebml_master(pb, attached_file);
1143 end_ebml_master(pb, attachments);
1148 static int mkv_write_header(AVFormatContext *s)
1150 MatroskaMuxContext *mkv = s->priv_data;
1151 AVIOContext *pb = s->pb;
1152 ebml_master ebml_header, segment_info;
1153 AVDictionaryEntry *tag;
1154 int ret, i, version = 2;
1156 if (!strcmp(s->oformat->name, "webm")) mkv->mode = MODE_WEBM;
1157 else mkv->mode = MODE_MATROSKAv2;
1159 if (s->avoid_negative_ts < 0)
1160 s->avoid_negative_ts = 1;
1162 if (mkv->mode != MODE_WEBM ||
1163 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1164 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1167 for (i = 0; i < s->nb_streams; i++) {
1168 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_ATRAC3 ||
1169 s->streams[i]->codec->codec_id == AV_CODEC_ID_COOK ||
1170 s->streams[i]->codec->codec_id == AV_CODEC_ID_RA_288 ||
1171 s->streams[i]->codec->codec_id == AV_CODEC_ID_SIPR ||
1172 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV10 ||
1173 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV20) {
1174 av_log(s, AV_LOG_ERROR,
1175 "The Matroska muxer does not yet support muxing %s\n",
1176 avcodec_get_name(s->streams[i]->codec->codec_id));
1177 return AVERROR_PATCHWELCOME;
1179 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_OPUS ||
1180 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1181 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1185 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1187 return AVERROR(ENOMEM);
1189 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1190 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1191 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1192 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1193 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1194 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1195 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1196 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1197 end_ebml_master(pb, ebml_header);
1199 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1200 mkv->segment_offset = avio_tell(pb);
1202 // we write 2 seek heads - one at the end of the file to point to each
1203 // cluster, and one at the beginning to point to all other level one
1204 // elements (including the seek head at the end of the file), which
1205 // isn't more than 10 elements if we only write one of each other
1206 // currently defined level 1 element
1207 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1208 if (!mkv->main_seekhead)
1209 return AVERROR(ENOMEM);
1211 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1212 if (ret < 0) return ret;
1214 segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
1215 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1216 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1217 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1218 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1219 uint32_t segment_uid[4];
1222 av_lfg_init(&lfg, av_get_random_seed());
1224 for (i = 0; i < 4; i++)
1225 segment_uid[i] = av_lfg_get(&lfg);
1227 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , LIBAVFORMAT_IDENT);
1228 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1229 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1231 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1232 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1234 const char *ident = "Lavf";
1235 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1236 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1239 if (tag = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
1240 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1241 int64_t date_utc = (ff_iso8601_to_unix_time(tag->value) - 978307200) * 1000000000;
1242 uint8_t date_utc_buf[8];
1243 AV_WB64(date_utc_buf, date_utc);
1244 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1247 // reserve space for the duration
1249 mkv->duration_offset = avio_tell(pb);
1250 put_ebml_void(pb, 11); // assumes double-precision float to be written
1251 end_ebml_master(pb, segment_info);
1253 ret = mkv_write_tracks(s);
1254 if (ret < 0) return ret;
1256 for (i = 0; i < s->nb_chapters; i++)
1257 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1259 if (mkv->mode != MODE_WEBM) {
1260 ret = mkv_write_chapters(s);
1261 if (ret < 0) return ret;
1263 ret = mkv_write_tags(s);
1264 if (ret < 0) return ret;
1266 ret = mkv_write_attachments(s);
1267 if (ret < 0) return ret;
1270 if (!s->pb->seekable)
1271 mkv_write_seekhead(pb, mkv->main_seekhead);
1273 mkv->cues = mkv_start_cues(mkv->segment_offset);
1274 if (mkv->cues == NULL)
1275 return AVERROR(ENOMEM);
1277 if (pb->seekable && mkv->reserve_cues_space) {
1278 mkv->cues_pos = avio_tell(pb);
1279 put_ebml_void(pb, mkv->reserve_cues_space);
1282 av_init_packet(&mkv->cur_audio_pkt);
1283 mkv->cur_audio_pkt.size = 0;
1284 mkv->cluster_pos = -1;
1288 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1289 // after 4k and on a keyframe
1291 if (mkv->cluster_time_limit < 0)
1292 mkv->cluster_time_limit = 5000;
1293 if (mkv->cluster_size_limit < 0)
1294 mkv->cluster_size_limit = 5 * 1024 * 1024;
1296 if (mkv->cluster_time_limit < 0)
1297 mkv->cluster_time_limit = 1000;
1298 if (mkv->cluster_size_limit < 0)
1299 mkv->cluster_size_limit = 32 * 1024;
1305 static int mkv_blockgroup_size(int pkt_size)
1307 int size = pkt_size + 4;
1308 size += ebml_num_size(size);
1309 size += 2; // EBML ID for block and block duration
1310 size += 8; // max size of block duration
1311 size += ebml_num_size(size);
1312 size += 1; // blockgroup EBML ID
1316 static int ass_get_duration(const uint8_t *p)
1318 int sh, sm, ss, sc, eh, em, es, ec;
1319 uint64_t start, end;
1321 if (sscanf(p, "%*[^,],%d:%d:%d%*c%d,%d:%d:%d%*c%d",
1322 &sh, &sm, &ss, &sc, &eh, &em, &es, &ec) != 8)
1324 start = 3600000LL*sh + 60000LL*sm + 1000LL*ss + 10LL*sc;
1325 end = 3600000LL*eh + 60000LL*em + 1000LL*es + 10LL*ec;
1330 /* Writes the contents of pkt to a block, using the data starting at *datap.
1331 * If pkt corresponds to more than one block, this writes the contents of the first block
1332 * (starting from *datap) and updates *datap so it points to the beginning of the data
1333 * corresponding to the next block.
1335 static int mkv_write_ass_block(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt, uint8_t **datap)
1337 MatroskaMuxContext *mkv = s->priv_data;
1338 int i, layer = 0, size, line_size, data_size = pkt->size - (*datap - pkt->data);
1339 uint8_t *start, *end, *data = *datap;
1340 ebml_master blockgroup;
1343 int duration = ass_get_duration(data);
1344 end = memchr(data, '\n', data_size);
1345 size = line_size = end ? end-data+1 : data_size;
1346 size -= end ? (end[-1]=='\r')+1 : 0;
1348 for (i=0; i<3; i++, start++)
1349 if (!(start = memchr(start, ',', size-(start-data))))
1351 size -= start - data;
1352 sscanf(data, "Dialogue: %d,", &layer);
1353 i = snprintf(buffer, sizeof(buffer), "%"PRId64",%d,",
1354 s->streams[pkt->stream_index]->nb_frames, layer);
1355 size = FFMIN(i+size, sizeof(buffer));
1356 memcpy(buffer+i, start, size-i);
1358 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1359 "pts %" PRId64 ", duration %d\n",
1360 avio_tell(pb), size, pkt->pts, duration);
1361 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1362 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1363 put_ebml_num(pb, size+4, 0);
1364 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1365 avio_wb16(pb, pkt->pts - mkv->cluster_pts);
1367 avio_write(pb, buffer, size);
1368 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1369 end_ebml_master(pb, blockgroup);
1371 *datap += line_size;
1377 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1384 dst = av_malloc(srclen);
1386 return AVERROR(ENOMEM);
1388 while (srclen >= WV_HEADER_SIZE) {
1391 ret = ff_wv_parse_header(&header, src);
1394 src += WV_HEADER_SIZE;
1395 srclen -= WV_HEADER_SIZE;
1397 if (srclen < header.blocksize) {
1398 ret = AVERROR_INVALIDDATA;
1402 if (header.initial) {
1403 AV_WL32(dst + offset, header.samples);
1406 AV_WL32(dst + offset, header.flags);
1407 AV_WL32(dst + offset + 4, header.crc);
1410 if (!(header.initial && header.final)) {
1411 AV_WL32(dst + offset, header.blocksize);
1415 memcpy(dst + offset, src, header.blocksize);
1416 src += header.blocksize;
1417 srclen -= header.blocksize;
1418 offset += header.blocksize;
1430 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1431 unsigned int blockid, AVPacket *pkt, int flags)
1433 MatroskaMuxContext *mkv = s->priv_data;
1434 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1435 uint8_t *data = NULL, *side_data = NULL;
1436 int offset = 0, size = pkt->size, side_data_size = 0;
1437 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1438 uint64_t additional_id = 0;
1439 int64_t discard_padding = 0;
1440 ebml_master block_group, block_additions, block_more;
1442 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1443 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1444 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, flags);
1445 if (codec->codec_id == AV_CODEC_ID_H264 && codec->extradata_size > 0 &&
1446 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1447 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1448 else if (codec->codec_id == AV_CODEC_ID_HEVC && codec->extradata_size > 6 &&
1449 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1450 /* extradata is Annex B, assume the bitstream is too and convert it */
1451 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1452 else if (codec->codec_id == AV_CODEC_ID_WAVPACK) {
1453 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
1455 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
1461 if (codec->codec_id == AV_CODEC_ID_PRORES) {
1462 /* Matroska specification requires to remove the first QuickTime atom
1468 side_data = av_packet_get_side_data(pkt,
1469 AV_PKT_DATA_SKIP_SAMPLES,
1472 if (side_data && side_data_size >= 10) {
1473 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
1474 (AVRational){1, codec->sample_rate},
1475 (AVRational){1, 1000000000});
1478 side_data = av_packet_get_side_data(pkt,
1479 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
1482 additional_id = AV_RB64(side_data);
1484 side_data_size -= 8;
1487 if ((side_data_size && additional_id == 1) || discard_padding) {
1488 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
1489 blockid = MATROSKA_ID_BLOCK;
1492 put_ebml_id(pb, blockid);
1493 put_ebml_num(pb, size+4, 0);
1494 // this assumes stream_index is less than 126
1495 avio_w8(pb, 0x80 | (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1)));
1496 avio_wb16(pb, ts - mkv->cluster_pts);
1498 avio_write(pb, data + offset, size);
1499 if (data != pkt->data)
1502 if (discard_padding) {
1503 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
1506 if (side_data_size && additional_id == 1) {
1507 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
1508 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
1509 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
1510 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
1511 put_ebml_num(pb, side_data_size, 0);
1512 avio_write(pb, side_data, side_data_size);
1513 end_ebml_master(pb, block_more);
1514 end_ebml_master(pb, block_additions);
1516 if ((side_data_size && additional_id == 1) || discard_padding) {
1517 end_ebml_master(pb, block_group);
1521 static int srt_get_duration(uint8_t **buf)
1523 int i, duration = 0;
1525 for (i=0; i<2 && !duration; i++) {
1526 int s_hour, s_min, s_sec, s_hsec, e_hour, e_min, e_sec, e_hsec;
1527 if (sscanf(*buf, "%d:%2d:%2d%*1[,.]%3d --> %d:%2d:%2d%*1[,.]%3d",
1528 &s_hour, &s_min, &s_sec, &s_hsec,
1529 &e_hour, &e_min, &e_sec, &e_hsec) == 8) {
1530 s_min += 60*s_hour; e_min += 60*e_hour;
1531 s_sec += 60*s_min; e_sec += 60*e_min;
1532 s_hsec += 1000*s_sec; e_hsec += 1000*e_sec;
1533 duration = e_hsec - s_hsec;
1535 *buf += ff_subtitles_next_line(*buf);
1540 static int mkv_write_srt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1542 ebml_master blockgroup;
1543 AVPacket pkt2 = *pkt;
1544 int64_t duration = srt_get_duration(&pkt2.data);
1545 pkt2.size -= pkt2.data - pkt->data;
1547 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1548 mkv_blockgroup_size(pkt2.size));
1549 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, &pkt2, 0);
1550 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1551 end_ebml_master(pb, blockgroup);
1556 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1558 MatroskaMuxContext *mkv = s->priv_data;
1559 ebml_master blockgroup;
1560 int id_size, settings_size, size;
1561 uint8_t *id, *settings;
1562 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1563 const int flags = 0;
1566 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
1570 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
1573 size = id_size + 1 + settings_size + 1 + pkt->size;
1575 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1576 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1577 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
1579 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1581 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1582 put_ebml_num(pb, size+4, 0);
1583 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1584 avio_wb16(pb, ts - mkv->cluster_pts);
1586 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
1588 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
1589 end_ebml_master(pb, blockgroup);
1591 return pkt->duration;
1594 static void mkv_flush_dynbuf(AVFormatContext *s)
1596 MatroskaMuxContext *mkv = s->priv_data;
1603 bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
1604 avio_write(s->pb, dyn_buf, bufsize);
1609 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
1611 MatroskaMuxContext *mkv = s->priv_data;
1612 AVIOContext *pb = s->pb;
1613 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1614 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1615 int duration = pkt->duration;
1617 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1618 int64_t relative_packet_pos;
1619 uint8_t *data_offset = pkt->data;
1620 int dash_tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
1622 if (ts == AV_NOPTS_VALUE) {
1623 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
1624 return AVERROR(EINVAL);
1626 ts += mkv->tracks[pkt->stream_index].ts_offset;
1628 if (!s->pb->seekable) {
1630 if ((ret = avio_open_dyn_buf(&mkv->dyn_bc)) < 0) {
1631 av_log(s, AV_LOG_ERROR, "Failed to open dynamic buffer\n");
1638 if (mkv->cluster_pos == -1) {
1639 mkv->cluster_pos = avio_tell(s->pb);
1640 mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
1641 put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
1642 mkv->cluster_pts = FFMAX(0, ts);
1645 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1647 if (codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1648 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe << 7);
1649 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue) {
1650 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
1651 if (ret < 0) return ret;
1654 } else if (codec->codec_id == AV_CODEC_ID_SSA) {
1655 while (data_offset < pkt->data + pkt->size) {
1656 duration = mkv_write_ass_block(s, pb, pkt, &data_offset);
1657 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, duration);
1658 if (ret < 0) return ret;
1659 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1663 if (codec->codec_id == AV_CODEC_ID_SRT) {
1664 duration = mkv_write_srt_blocks(s, pb, pkt);
1665 } else if (codec->codec_id == AV_CODEC_ID_WEBVTT) {
1666 duration = mkv_write_vtt_blocks(s, pb, pkt);
1668 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(pkt->size));
1669 /* For backward compatibility, prefer convergence_duration. */
1670 if (pkt->convergence_duration > 0) {
1671 duration = pkt->convergence_duration;
1673 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 0);
1674 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1675 end_ebml_master(pb, blockgroup);
1678 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, duration);
1679 if (ret < 0) return ret;
1682 mkv->duration = FFMAX(mkv->duration, ts + duration);
1686 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
1688 MatroskaMuxContext *mkv = s->priv_data;
1689 int codec_type = s->streams[pkt->stream_index]->codec->codec_type;
1690 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1692 int64_t cluster_time;
1695 int start_new_cluster;
1697 if (mkv->tracks[pkt->stream_index].write_dts)
1698 cluster_time = pkt->dts - mkv->cluster_pts;
1700 cluster_time = pkt->pts - mkv->cluster_pts;
1701 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
1703 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1704 // after 4k and on a keyframe
1705 if (s->pb->seekable) {
1707 cluster_size = avio_tell(pb) - mkv->cluster_pos;
1710 cluster_size = avio_tell(pb);
1713 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
1714 // WebM DASH specification states that the first block of every cluster
1715 // has to be a key frame. So for DASH video, we only create a cluster
1716 // on seeing key frames.
1717 start_new_cluster = keyframe;
1718 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
1719 cluster_time > mkv->cluster_time_limit) {
1720 // For DASH audio, we create a Cluster based on cluster_time_limit
1721 start_new_cluster = 1;
1722 } else if (!mkv->is_dash &&
1723 (cluster_size > mkv->cluster_size_limit ||
1724 cluster_time > mkv->cluster_time_limit ||
1725 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
1726 cluster_size > 4 * 1024))) {
1727 start_new_cluster = 1;
1729 start_new_cluster = 0;
1732 if (mkv->cluster_pos != -1 && start_new_cluster) {
1733 av_log(s, AV_LOG_DEBUG, "Starting new cluster at offset %" PRIu64
1734 " bytes, pts %" PRIu64 "dts %" PRIu64 "\n",
1735 avio_tell(pb), pkt->pts, pkt->dts);
1736 end_ebml_master(pb, mkv->cluster);
1737 mkv->cluster_pos = -1;
1739 mkv_flush_dynbuf(s);
1743 // check if we have an audio packet cached
1744 if (mkv->cur_audio_pkt.size > 0) {
1745 // for DASH audio, a CuePoint has to be added when there is a new cluster.
1746 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
1747 mkv->is_dash ? start_new_cluster : 0);
1748 av_free_packet(&mkv->cur_audio_pkt);
1750 av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret);
1755 // buffer an audio packet to ensure the packet containing the video
1756 // keyframe's timecode is contained in the same cluster for WebM
1757 if (codec_type == AVMEDIA_TYPE_AUDIO) {
1758 mkv->cur_audio_pkt = *pkt;
1760 mkv->cur_audio_pkt.buf = av_buffer_ref(pkt->buf);
1761 ret = mkv->cur_audio_pkt.buf ? 0 : AVERROR(ENOMEM);
1763 ret = av_dup_packet(&mkv->cur_audio_pkt);
1764 if (mkv->cur_audio_pkt.side_data_elems > 0) {
1765 ret = av_copy_packet_side_data(&mkv->cur_audio_pkt, &mkv->cur_audio_pkt);
1768 ret = mkv_write_packet_internal(s, pkt, 0);
1772 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
1774 MatroskaMuxContext *mkv = s->priv_data;
1776 if (s->pb->seekable)
1781 if (mkv->cluster_pos != -1) {
1782 av_log(s, AV_LOG_DEBUG, "Flushing cluster at offset %" PRIu64
1783 " bytes\n", avio_tell(pb));
1784 end_ebml_master(pb, mkv->cluster);
1785 mkv->cluster_pos = -1;
1787 mkv_flush_dynbuf(s);
1792 return mkv_write_packet(s, pkt);
1795 static int mkv_write_trailer(AVFormatContext *s)
1797 MatroskaMuxContext *mkv = s->priv_data;
1798 AVIOContext *pb = s->pb;
1799 int64_t currentpos, cuespos;
1802 // check if we have an audio packet cached
1803 if (mkv->cur_audio_pkt.size > 0) {
1804 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
1805 av_free_packet(&mkv->cur_audio_pkt);
1807 av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret);
1813 end_ebml_master(mkv->dyn_bc, mkv->cluster);
1814 mkv_flush_dynbuf(s);
1815 } else if (mkv->cluster_pos != -1) {
1816 end_ebml_master(pb, mkv->cluster);
1819 if (mkv->mode != MODE_WEBM) {
1820 ret = mkv_write_chapters(s);
1821 if (ret < 0) return ret;
1825 if (mkv->cues->num_entries) {
1826 if (mkv->reserve_cues_space) {
1829 currentpos = avio_tell(pb);
1830 avio_seek(pb, mkv->cues_pos, SEEK_SET);
1832 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
1833 cues_end = avio_tell(pb);
1834 if (cues_end > cuespos + mkv->reserve_cues_space) {
1835 av_log(s, AV_LOG_ERROR, "Insufficient space reserved for cues: %d "
1836 "(needed: %"PRId64").\n", mkv->reserve_cues_space,
1837 cues_end - cuespos);
1838 return AVERROR(EINVAL);
1841 if (cues_end < cuespos + mkv->reserve_cues_space)
1842 put_ebml_void(pb, mkv->reserve_cues_space - (cues_end - cuespos));
1844 avio_seek(pb, currentpos, SEEK_SET);
1846 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
1849 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES, cuespos);
1850 if (ret < 0) return ret;
1853 mkv_write_seekhead(pb, mkv->main_seekhead);
1855 // update the duration
1856 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
1857 currentpos = avio_tell(pb);
1858 avio_seek(pb, mkv->duration_offset, SEEK_SET);
1859 put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
1861 avio_seek(pb, currentpos, SEEK_SET);
1864 end_ebml_master(pb, mkv->segment);
1865 av_freep(&mkv->tracks);
1866 av_freep(&mkv->cues->entries);
1867 av_freep(&mkv->cues);
1872 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
1875 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
1876 if (ff_mkv_codec_tags[i].id == codec_id)
1879 if (std_compliance < FF_COMPLIANCE_NORMAL) { // mkv theoretically supports any
1880 enum AVMediaType type = avcodec_get_type(codec_id); // video/audio through VFW/ACM
1881 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
1888 static const AVCodecTag additional_audio_tags[] = {
1889 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
1890 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
1891 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
1892 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
1893 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
1894 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
1895 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
1896 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
1897 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
1898 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
1899 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
1900 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
1901 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
1904 static const AVCodecTag additional_video_tags[] = {
1905 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
1906 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
1907 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
1908 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
1909 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
1910 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
1913 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
1914 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
1915 static const AVOption options[] = {
1916 { "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 },
1917 { "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 },
1918 { "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 },
1919 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
1920 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
1924 #if CONFIG_MATROSKA_MUXER
1925 static const AVClass matroska_class = {
1926 .class_name = "matroska muxer",
1927 .item_name = av_default_item_name,
1929 .version = LIBAVUTIL_VERSION_INT,
1932 AVOutputFormat ff_matroska_muxer = {
1934 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
1935 .mime_type = "video/x-matroska",
1936 .extensions = "mkv",
1937 .priv_data_size = sizeof(MatroskaMuxContext),
1938 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
1939 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
1940 .video_codec = CONFIG_LIBX264_ENCODER ?
1941 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
1942 .write_header = mkv_write_header,
1943 .write_packet = mkv_write_flush_packet,
1944 .write_trailer = mkv_write_trailer,
1945 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
1946 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
1947 .codec_tag = (const AVCodecTag* const []){
1948 ff_codec_bmp_tags, ff_codec_wav_tags,
1949 additional_audio_tags, additional_video_tags, 0
1952 .subtitle_codec = AV_CODEC_ID_SSA,
1954 .subtitle_codec = AV_CODEC_ID_ASS,
1956 .query_codec = mkv_query_codec,
1957 .priv_class = &matroska_class,
1961 #if CONFIG_WEBM_MUXER
1962 static const AVClass webm_class = {
1963 .class_name = "webm muxer",
1964 .item_name = av_default_item_name,
1966 .version = LIBAVUTIL_VERSION_INT,
1969 AVOutputFormat ff_webm_muxer = {
1971 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
1972 .mime_type = "video/webm",
1973 .extensions = "webm",
1974 .priv_data_size = sizeof(MatroskaMuxContext),
1975 .audio_codec = AV_CODEC_ID_VORBIS,
1976 .video_codec = AV_CODEC_ID_VP8,
1977 .subtitle_codec = AV_CODEC_ID_WEBVTT,
1978 .write_header = mkv_write_header,
1979 .write_packet = mkv_write_flush_packet,
1980 .write_trailer = mkv_write_trailer,
1981 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
1982 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
1983 .priv_class = &webm_class,
1987 #if CONFIG_MATROSKA_AUDIO_MUXER
1988 static const AVClass mka_class = {
1989 .class_name = "matroska audio muxer",
1990 .item_name = av_default_item_name,
1992 .version = LIBAVUTIL_VERSION_INT,
1994 AVOutputFormat ff_matroska_audio_muxer = {
1996 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
1997 .mime_type = "audio/x-matroska",
1998 .extensions = "mka",
1999 .priv_data_size = sizeof(MatroskaMuxContext),
2000 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2001 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2002 .video_codec = AV_CODEC_ID_NONE,
2003 .write_header = mkv_write_header,
2004 .write_packet = mkv_write_flush_packet,
2005 .write_trailer = mkv_write_trailer,
2006 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2008 .codec_tag = (const AVCodecTag* const []){
2009 ff_codec_wav_tags, additional_audio_tags, 0
2011 .priv_class = &mka_class,