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"
49 #include "libavutil/stereo3d.h"
51 #include "libavcodec/xiph.h"
52 #include "libavcodec/mpeg4audio.h"
53 #include "libavcodec/internal.h"
55 typedef struct ebml_master {
56 int64_t pos; ///< absolute offset in the file where the master's elements start
57 int sizebytes; ///< how many bytes were reserved for the size
60 typedef struct mkv_seekhead_entry {
61 unsigned int elementid;
65 typedef struct mkv_seekhead {
67 int64_t segment_offset; ///< the file offset to the beginning of the segment
68 int reserved_size; ///< -1 if appending to file
70 mkv_seekhead_entry *entries;
74 typedef struct mkv_cuepoint {
78 int64_t cluster_pos; ///< file offset of the cluster containing the block
79 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
80 int64_t duration; ///< duration of the block according to time base
83 typedef struct mkv_cues {
84 int64_t segment_offset;
85 mkv_cuepoint *entries;
89 typedef struct mkv_track {
95 #define MODE_MATROSKAv2 0x01
96 #define MODE_WEBM 0x02
98 typedef struct MatroskaMuxContext {
103 int64_t segment_offset;
105 int64_t cluster_pos; ///< file offset of the current cluster
107 int64_t duration_offset;
109 mkv_seekhead *main_seekhead;
113 AVPacket cur_audio_pkt;
115 int have_attachments;
117 int reserve_cues_space;
118 int cluster_size_limit;
120 int64_t cluster_time_limit;
122 int dash_track_number;
124 uint32_t chapter_id_offset;
128 } MatroskaMuxContext;
131 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
132 * offset, 4 bytes for target EBML ID */
133 #define MAX_SEEKENTRY_SIZE 21
135 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 4
137 #define MAX_CUETRACKPOS_SIZE 42
139 /** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */
140 #define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE * num_tracks
142 /** Seek preroll value for opus */
143 #define OPUS_SEEK_PREROLL 80000000
145 static int ebml_id_size(unsigned int id)
147 return (av_log2(id + 1) - 1) / 7 + 1;
150 static void put_ebml_id(AVIOContext *pb, unsigned int id)
152 int i = ebml_id_size(id);
154 avio_w8(pb, (uint8_t)(id >> (i * 8)));
158 * Write an EBML size meaning "unknown size".
160 * @param bytes The number of bytes the size should occupy (maximum: 8).
162 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
164 av_assert0(bytes <= 8);
165 avio_w8(pb, 0x1ff >> bytes);
166 ffio_fill(pb, 0xff, bytes - 1);
170 * Calculate how many bytes are needed to represent a given number in EBML.
172 static int ebml_num_size(uint64_t num)
175 while ((num + 1) >> bytes * 7)
181 * Write a number in EBML variable length format.
183 * @param bytes The number of bytes that need to be used to write the number.
184 * If zero, any number of bytes can be used.
186 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
188 int i, needed_bytes = ebml_num_size(num);
190 // sizes larger than this are currently undefined in EBML
191 av_assert0(num < (1ULL << 56) - 1);
194 // don't care how many bytes are used, so use the min
195 bytes = needed_bytes;
196 // the bytes needed to write the given size would exceed the bytes
197 // that we need to use, so write unknown size. This shouldn't happen.
198 av_assert0(bytes >= needed_bytes);
200 num |= 1ULL << bytes * 7;
201 for (i = bytes - 1; i >= 0; i--)
202 avio_w8(pb, (uint8_t)(num >> i * 8));
205 static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val)
212 put_ebml_id(pb, elementid);
213 put_ebml_num(pb, bytes, 0);
214 for (i = bytes - 1; i >= 0; i--)
215 avio_w8(pb, (uint8_t)(val >> i * 8));
218 static void put_ebml_sint(AVIOContext *pb, unsigned int elementid, int64_t val)
221 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
223 while (tmp>>=8) bytes++;
225 put_ebml_id(pb, elementid);
226 put_ebml_num(pb, bytes, 0);
227 for (i = bytes - 1; i >= 0; i--)
228 avio_w8(pb, (uint8_t)(val >> i * 8));
231 static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val)
233 put_ebml_id(pb, elementid);
234 put_ebml_num(pb, 8, 0);
235 avio_wb64(pb, av_double2int(val));
238 static void put_ebml_binary(AVIOContext *pb, unsigned int elementid,
239 const void *buf, int size)
241 put_ebml_id(pb, elementid);
242 put_ebml_num(pb, size, 0);
243 avio_write(pb, buf, size);
246 static void put_ebml_string(AVIOContext *pb, unsigned int elementid,
249 put_ebml_binary(pb, elementid, str, strlen(str));
253 * Write a void element of a given size. Useful for reserving space in
254 * the file to be written to later.
256 * @param size The number of bytes to reserve, which must be at least 2.
258 static void put_ebml_void(AVIOContext *pb, uint64_t size)
260 int64_t currentpos = avio_tell(pb);
262 av_assert0(size >= 2);
264 put_ebml_id(pb, EBML_ID_VOID);
265 // we need to subtract the length needed to store the size from the
266 // size we need to reserve so 2 cases, we use 8 bytes to store the
267 // size if possible, 1 byte otherwise
269 put_ebml_num(pb, size - 1, 0);
271 put_ebml_num(pb, size - 9, 8);
272 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
275 static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid,
276 uint64_t expectedsize)
278 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
279 put_ebml_id(pb, elementid);
280 put_ebml_size_unknown(pb, bytes);
281 return (ebml_master) {avio_tell(pb), bytes };
284 static void end_ebml_master(AVIOContext *pb, ebml_master master)
286 int64_t pos = avio_tell(pb);
288 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
290 put_ebml_num(pb, pos - master.pos, master.sizebytes);
291 avio_seek(pb, pos, SEEK_SET);
294 static void put_xiph_size(AVIOContext *pb, int size)
296 ffio_fill(pb, 255, size / 255);
297 avio_w8(pb, size % 255);
301 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
302 * elements. If a maximum number of elements is specified, enough space
303 * will be reserved at the current file location to write a seek head of
306 * @param segment_offset The absolute offset to the position in the file
307 * where the segment begins.
308 * @param numelements The maximum number of elements that will be indexed
309 * by this seek head, 0 if unlimited.
311 static mkv_seekhead *mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset,
314 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
318 new_seekhead->segment_offset = segment_offset;
320 if (numelements > 0) {
321 new_seekhead->filepos = avio_tell(pb);
322 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
323 // and size, and 3 bytes to guarantee that an EBML void element
324 // will fit afterwards
325 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 13;
326 new_seekhead->max_entries = numelements;
327 put_ebml_void(pb, new_seekhead->reserved_size);
332 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
334 mkv_seekhead_entry *entries = seekhead->entries;
336 // don't store more elements than we reserved space for
337 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
340 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
342 return AVERROR(ENOMEM);
343 seekhead->entries = entries;
345 seekhead->entries[seekhead->num_entries].elementid = elementid;
346 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
352 * Write the seek head to the file and free it. If a maximum number of
353 * elements was specified to mkv_start_seekhead(), the seek head will
354 * be written at the location reserved for it. Otherwise, it is written
355 * at the current location in the file.
357 * @return The file offset where the seekhead was written,
358 * -1 if an error occurred.
360 static int64_t mkv_write_seekhead(AVIOContext *pb, mkv_seekhead *seekhead)
362 ebml_master metaseek, seekentry;
366 currentpos = avio_tell(pb);
368 if (seekhead->reserved_size > 0) {
369 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
375 metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size);
376 for (i = 0; i < seekhead->num_entries; i++) {
377 mkv_seekhead_entry *entry = &seekhead->entries[i];
379 seekentry = start_ebml_master(pb, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
381 put_ebml_id(pb, MATROSKA_ID_SEEKID);
382 put_ebml_num(pb, ebml_id_size(entry->elementid), 0);
383 put_ebml_id(pb, entry->elementid);
385 put_ebml_uint(pb, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
386 end_ebml_master(pb, seekentry);
388 end_ebml_master(pb, metaseek);
390 if (seekhead->reserved_size > 0) {
391 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
392 put_ebml_void(pb, remaining);
393 avio_seek(pb, currentpos, SEEK_SET);
395 currentpos = seekhead->filepos;
398 av_freep(&seekhead->entries);
404 static mkv_cues *mkv_start_cues(int64_t segment_offset)
406 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
410 cues->segment_offset = segment_offset;
414 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
415 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
417 mkv_cuepoint *entries = cues->entries;
422 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
424 return AVERROR(ENOMEM);
425 cues->entries = entries;
427 cues->entries[cues->num_entries].pts = ts;
428 cues->entries[cues->num_entries].stream_idx = stream;
429 cues->entries[cues->num_entries].tracknum = tracknum;
430 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
431 cues->entries[cues->num_entries].relative_pos = relative_pos;
432 cues->entries[cues->num_entries++].duration = duration;
437 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
439 AVIOContext *pb = s->pb;
440 ebml_master cues_element;
444 currentpos = avio_tell(pb);
445 cues_element = start_ebml_master(pb, MATROSKA_ID_CUES, 0);
447 for (i = 0; i < cues->num_entries; i++) {
448 ebml_master cuepoint, track_positions;
449 mkv_cuepoint *entry = &cues->entries[i];
450 uint64_t pts = entry->pts;
453 // Calculate the number of entries, so we know the element size
454 for (j = 0; j < num_tracks; j++)
455 tracks[j].has_cue = 0;
456 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
457 int tracknum = entry[j].stream_idx;
458 av_assert0(tracknum>=0 && tracknum<num_tracks);
459 if (tracks[tracknum].has_cue && s->streams[tracknum]->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
461 tracks[tracknum].has_cue = 1;
465 cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(ctp_nb));
466 put_ebml_uint(pb, MATROSKA_ID_CUETIME, pts);
468 // put all the entries from different tracks that have the exact same
469 // timestamp into the same CuePoint
470 for (j = 0; j < num_tracks; j++)
471 tracks[j].has_cue = 0;
472 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
473 int tracknum = entry[j].stream_idx;
474 av_assert0(tracknum>=0 && tracknum<num_tracks);
475 if (tracks[tracknum].has_cue && s->streams[tracknum]->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
477 tracks[tracknum].has_cue = 1;
478 track_positions = start_ebml_master(pb, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
479 put_ebml_uint(pb, MATROSKA_ID_CUETRACK , entry[j].tracknum );
480 put_ebml_uint(pb, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
481 put_ebml_uint(pb, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
482 if (entry[j].duration != -1)
483 put_ebml_uint(pb, MATROSKA_ID_CUEDURATION , entry[j].duration);
484 end_ebml_master(pb, track_positions);
487 end_ebml_master(pb, cuepoint);
489 end_ebml_master(pb, cues_element);
494 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec)
496 const uint8_t *header_start[3];
498 int first_header_size;
501 if (codec->codec_id == AV_CODEC_ID_VORBIS)
502 first_header_size = 30;
504 first_header_size = 42;
506 if (avpriv_split_xiph_headers(codec->extradata, codec->extradata_size,
507 first_header_size, header_start, header_len) < 0) {
508 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
512 avio_w8(pb, 2); // number packets - 1
513 for (j = 0; j < 2; j++) {
514 put_xiph_size(pb, header_len[j]);
516 for (j = 0; j < 3; j++)
517 avio_write(pb, header_start[j], header_len[j]);
522 static int put_wv_codecpriv(AVIOContext *pb, AVCodecContext *codec)
524 if (codec->extradata && codec->extradata_size == 2)
525 avio_write(pb, codec->extradata, 2);
527 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
531 static int put_flac_codecpriv(AVFormatContext *s,
532 AVIOContext *pb, AVCodecContext *codec)
534 int write_comment = (codec->channel_layout &&
535 !(codec->channel_layout & ~0x3ffffULL) &&
536 !ff_flac_is_native_layout(codec->channel_layout));
537 int ret = ff_flac_write_header(pb, codec->extradata, codec->extradata_size,
544 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
545 "Lavf" : LIBAVFORMAT_IDENT;
546 AVDictionary *dict = NULL;
547 uint8_t buf[32], *data, *p;
550 snprintf(buf, sizeof(buf), "0x%"PRIx64, codec->channel_layout);
551 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
553 len = ff_vorbiscomment_length(dict, vendor);
554 data = av_malloc(len + 4);
557 return AVERROR(ENOMEM);
561 AV_WB24(data + 1, len);
564 ff_vorbiscomment_write(&p, &dict, vendor);
566 avio_write(pb, data, len + 4);
575 static int get_aac_sample_rates(AVFormatContext *s, AVCodecContext *codec,
576 int *sample_rate, int *output_sample_rate)
578 MPEG4AudioConfig mp4ac;
580 if (avpriv_mpeg4audio_get_config(&mp4ac, codec->extradata,
581 codec->extradata_size * 8, 1) < 0) {
582 av_log(s, AV_LOG_ERROR,
583 "Error parsing AAC extradata, unable to determine samplerate.\n");
584 return AVERROR(EINVAL);
587 *sample_rate = mp4ac.sample_rate;
588 *output_sample_rate = mp4ac.ext_sample_rate;
592 static int mkv_write_native_codecprivate(AVFormatContext *s,
593 AVCodecContext *codec,
596 switch (codec->codec_id) {
597 case AV_CODEC_ID_VORBIS:
598 case AV_CODEC_ID_THEORA:
599 return put_xiph_codecpriv(s, dyn_cp, codec);
600 case AV_CODEC_ID_FLAC:
601 return put_flac_codecpriv(s, dyn_cp, codec);
602 case AV_CODEC_ID_WAVPACK:
603 return put_wv_codecpriv(dyn_cp, codec);
604 case AV_CODEC_ID_H264:
605 return ff_isom_write_avcc(dyn_cp, codec->extradata,
606 codec->extradata_size);
607 case AV_CODEC_ID_HEVC:
608 return ff_isom_write_hvcc(dyn_cp, codec->extradata,
609 codec->extradata_size, 0);
610 case AV_CODEC_ID_ALAC:
611 if (codec->extradata_size < 36) {
612 av_log(s, AV_LOG_ERROR,
613 "Invalid extradata found, ALAC expects a 36-byte "
615 return AVERROR_INVALIDDATA;
617 avio_write(dyn_cp, codec->extradata + 12,
618 codec->extradata_size - 12);
621 if (codec->codec_id == AV_CODEC_ID_PRORES &&
622 ff_codec_get_id(ff_codec_movvideo_tags, codec->codec_tag) == AV_CODEC_ID_PRORES) {
623 avio_wl32(dyn_cp, codec->codec_tag);
624 } else if (codec->extradata_size && codec->codec_id != AV_CODEC_ID_TTA)
625 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
631 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
632 AVCodecContext *codec, int native_id,
637 int ret, codecpriv_size;
639 ret = avio_open_dyn_buf(&dyn_cp);
644 ret = mkv_write_native_codecprivate(s, codec, dyn_cp);
645 } else if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
647 if (!codec->codec_tag)
648 codec->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
650 if (codec->extradata_size) {
651 if ( ff_codec_get_id(ff_codec_movvideo_tags, codec->codec_tag) == codec->codec_id
652 && ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(codec->extradata + 4)) != codec->codec_id
655 avio_wb32(dyn_cp, 0x5a + codec->extradata_size);
656 avio_wl32(dyn_cp, codec->codec_tag);
657 for(i = 0; i < 0x5a - 8; i++)
660 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
663 if (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id))
664 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
665 avcodec_get_name(codec->codec_id));
667 if (!codec->codec_tag)
668 codec->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
670 if (!codec->codec_tag && codec->codec_id != AV_CODEC_ID_RAWVIDEO) {
671 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
672 avcodec_get_name(codec->codec_id));
673 ret = AVERROR(EINVAL);
676 ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0, 0);
678 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
680 tag = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id);
682 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
683 avcodec_get_name(codec->codec_id));
684 ret = AVERROR(EINVAL);
686 if (!codec->codec_tag)
687 codec->codec_tag = tag;
689 ff_put_wav_header(dyn_cp, codec, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
692 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
694 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
701 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
702 AVStream *st, int mode, int *h_width, int *h_height)
706 AVDictionaryEntry *tag;
707 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
711 // convert metadata into proper side data and add it to the stream
712 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
713 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
714 int stereo_mode = atoi(tag->value);
716 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
717 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
722 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
723 stereo_mode != 10 && stereo_mode != 12) {
724 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
730 // iterate to find the stereo3d side data
731 for (i = 0; i < st->nb_side_data; i++) {
732 AVPacketSideData sd = st->side_data[i];
733 if (sd.type == AV_PKT_DATA_STEREO3D) {
734 AVStereo3D *stereo = (AVStereo3D *)sd.data;
736 switch (stereo->type) {
738 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
740 case AV_STEREO3D_SIDEBYSIDE:
741 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
742 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
743 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
746 case AV_STEREO3D_TOPBOTTOM:
747 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
748 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
752 case AV_STEREO3D_CHECKERBOARD:
753 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
754 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
757 case AV_STEREO3D_LINES:
758 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
759 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
763 case AV_STEREO3D_COLUMNS:
764 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
765 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
769 case AV_STEREO3D_FRAMESEQUENCE:
770 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
771 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
779 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
782 // if webm, do not write unsupported modes
783 if ((mode == MODE_WEBM &&
784 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
785 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
786 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
787 av_log(s, AV_LOG_ERROR,
788 "The specified stereo mode is not valid.\n");
789 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
790 return AVERROR(EINVAL);
793 // write StereoMode if format is valid
794 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
799 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
800 int i, AVIOContext *pb, int default_stream_exists)
802 AVStream *st = s->streams[i];
803 AVCodecContext *codec = st->codec;
804 ebml_master subinfo, track;
807 int bit_depth = av_get_bits_per_sample(codec->codec_id);
808 int sample_rate = codec->sample_rate;
809 int output_sample_rate = 0;
810 int display_width_div = 1;
811 int display_height_div = 1;
813 AVDictionaryEntry *tag;
815 // ms precision is the de-facto standard timescale for mkv files
816 avpriv_set_pts_info(st, 64, 1, 1000);
818 if (codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
819 mkv->have_attachments = 1;
823 if (!bit_depth && codec->codec_id != AV_CODEC_ID_ADPCM_G726)
824 bit_depth = av_get_bytes_per_sample(codec->sample_fmt) << 3;
826 bit_depth = codec->bits_per_coded_sample;
828 if (codec->codec_id == AV_CODEC_ID_AAC) {
829 ret = get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate);
834 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
835 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
836 mkv->is_dash ? mkv->dash_track_number : i + 1);
837 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
838 mkv->is_dash ? mkv->dash_track_number : i + 1);
839 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
841 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
842 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
843 tag = av_dict_get(st->metadata, "language", NULL, 0);
844 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
845 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
846 } else if (tag && tag->value) {
847 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
850 // The default value for TRACKFLAGDEFAULT is 1, so add element
851 // if we need to clear it.
852 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
853 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
855 if (st->disposition & AV_DISPOSITION_FORCED)
856 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
858 if (mkv->mode == MODE_WEBM && codec->codec_id == AV_CODEC_ID_WEBVTT) {
859 const char *codec_id;
860 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
861 codec_id = "D_WEBVTT/CAPTIONS";
862 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
863 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
864 codec_id = "D_WEBVTT/DESCRIPTIONS";
865 native_id = MATROSKA_TRACK_TYPE_METADATA;
866 } else if (st->disposition & AV_DISPOSITION_METADATA) {
867 codec_id = "D_WEBVTT/METADATA";
868 native_id = MATROSKA_TRACK_TYPE_METADATA;
870 codec_id = "D_WEBVTT/SUBTITLES";
871 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
873 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
875 // look for a codec ID string specific to mkv to use,
876 // if none are found, use AVI codes
877 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
878 if (ff_mkv_codec_tags[j].id == codec->codec_id) {
879 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
884 if (codec->codec_id == AV_CODEC_ID_RAWVIDEO && !codec->codec_tag) {
885 if (mkv->allow_raw_vfw) {
888 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
889 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
890 return AVERROR(EINVAL);
895 if (codec->codec_type == AVMEDIA_TYPE_AUDIO && codec->initial_padding && codec->codec_id == AV_CODEC_ID_OPUS) {
896 // mkv->tracks[i].ts_offset = av_rescale_q(codec->initial_padding,
897 // (AVRational){ 1, codec->sample_rate },
900 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY,
901 av_rescale_q(codec->initial_padding,
902 (AVRational){ 1, codec->sample_rate },
903 (AVRational){ 1, 1000000000 }));
905 if (codec->codec_id == AV_CODEC_ID_OPUS) {
906 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
909 if (mkv->mode == MODE_WEBM && !(codec->codec_id == AV_CODEC_ID_VP8 ||
910 codec->codec_id == AV_CODEC_ID_VP9 ||
911 codec->codec_id == AV_CODEC_ID_OPUS ||
912 codec->codec_id == AV_CODEC_ID_VORBIS ||
913 codec->codec_id == AV_CODEC_ID_WEBVTT)) {
914 av_log(s, AV_LOG_ERROR,
915 "Only VP8 or VP9 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
916 return AVERROR(EINVAL);
919 switch (codec->codec_type) {
920 case AVMEDIA_TYPE_VIDEO:
921 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
923 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
924 && 1.0/av_q2d(st->avg_frame_rate) > av_q2d(codec->time_base))
925 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1E9 / av_q2d(st->avg_frame_rate));
927 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, av_q2d(codec->time_base)*1E9);
930 ff_codec_get_tag(ff_codec_movvideo_tags, codec->codec_id) &&
931 ((!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id) && codec->codec_id != AV_CODEC_ID_RAWVIDEO) ||
932 codec->codec_id == AV_CODEC_ID_SVQ1 ||
933 codec->codec_id == AV_CODEC_ID_SVQ3 ||
934 codec->codec_id == AV_CODEC_ID_CINEPAK))
938 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
939 else if (!native_id) {
940 // if there is no mkv-specific codec ID, use VFW mode
941 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
942 mkv->tracks[i].write_dts = 1;
945 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
946 // XXX: interlace flag?
947 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , codec->width);
948 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, codec->height);
950 // check both side data and metadata for stereo information,
951 // write the result to the bitstream if any is found
952 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
954 &display_height_div);
958 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
959 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
960 (codec->pix_fmt == AV_PIX_FMT_YUVA420P)) {
961 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
964 // write DisplayWidth and DisplayHeight, they contain the size of
965 // a single source view and/or the display aspect ratio
966 if (st->sample_aspect_ratio.num) {
967 int64_t d_width = av_rescale(codec->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
968 if (d_width > INT_MAX) {
969 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
970 return AVERROR(EINVAL);
972 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
973 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
974 } else if (display_width_div != 1 || display_height_div != 1) {
975 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , codec->width / display_width_div);
976 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
979 if (codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
980 uint32_t color_space = av_le2ne32(codec->codec_tag);
981 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
984 end_ebml_master(pb, subinfo);
987 case AVMEDIA_TYPE_AUDIO:
988 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
991 // no mkv-specific ID, use ACM mode
992 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
994 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
995 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , codec->channels);
996 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
997 if (output_sample_rate)
998 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1000 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1001 end_ebml_master(pb, subinfo);
1004 case AVMEDIA_TYPE_SUBTITLE:
1006 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", codec->codec_id);
1007 return AVERROR(ENOSYS);
1010 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT)
1011 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1013 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1016 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1017 return AVERROR(EINVAL);
1020 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
1021 ret = mkv_write_codecprivate(s, pb, codec, native_id, qt_id);
1026 end_ebml_master(pb, track);
1031 static int mkv_write_tracks(AVFormatContext *s)
1033 MatroskaMuxContext *mkv = s->priv_data;
1034 AVIOContext *pb = s->pb;
1036 int i, ret, default_stream_exists = 0;
1038 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
1042 tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
1043 for (i = 0; i < s->nb_streams; i++) {
1044 AVStream *st = s->streams[i];
1045 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1047 for (i = 0; i < s->nb_streams; i++) {
1048 ret = mkv_write_track(s, mkv, i, pb, default_stream_exists);
1052 end_ebml_master(pb, tracks);
1056 static int mkv_write_chapters(AVFormatContext *s)
1058 MatroskaMuxContext *mkv = s->priv_data;
1059 AVIOContext *pb = s->pb;
1060 ebml_master chapters, editionentry;
1061 AVRational scale = {1, 1E9};
1064 if (!s->nb_chapters || mkv->wrote_chapters)
1067 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1068 if (ret < 0) return ret;
1070 chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
1071 editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
1072 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1073 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1074 for (i = 0; i < s->nb_chapters; i++) {
1075 ebml_master chapteratom, chapterdisplay;
1076 AVChapter *c = s->chapters[i];
1077 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1078 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1079 AVDictionaryEntry *t = NULL;
1080 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1081 av_log(s, AV_LOG_ERROR,
1082 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1083 chapterstart, chapterend);
1084 return AVERROR_INVALIDDATA;
1087 chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
1088 put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1089 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1090 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1091 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1092 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1093 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1094 chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
1095 put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
1096 put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und");
1097 end_ebml_master(pb, chapterdisplay);
1099 end_ebml_master(pb, chapteratom);
1101 end_ebml_master(pb, editionentry);
1102 end_ebml_master(pb, chapters);
1104 mkv->wrote_chapters = 1;
1108 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1110 uint8_t *key = av_strdup(t->key);
1112 const uint8_t *lang = NULL;
1116 return AVERROR(ENOMEM);
1118 if ((p = strrchr(p, '-')) &&
1119 (lang = av_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1126 else if (*p >= 'a' && *p <= 'z')
1131 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1132 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1134 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1135 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1136 end_ebml_master(pb, tag);
1142 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
1143 unsigned int uid, ebml_master *tags)
1145 MatroskaMuxContext *mkv = s->priv_data;
1146 ebml_master tag, targets;
1147 AVDictionaryEntry *t = NULL;
1151 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1152 if (ret < 0) return ret;
1154 *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
1157 tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
1158 targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
1160 put_ebml_uint(s->pb, elementid, uid);
1161 end_ebml_master(s->pb, targets);
1163 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1164 if (av_strcasecmp(t->key, "title") &&
1165 av_strcasecmp(t->key, "stereo_mode") &&
1166 av_strcasecmp(t->key, "encoding_tool")) {
1167 ret = mkv_write_simpletag(s->pb, t);
1173 end_ebml_master(s->pb, tag);
1177 static int mkv_check_tag(AVDictionary *m)
1179 AVDictionaryEntry *t = NULL;
1181 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1182 if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode"))
1188 static int mkv_write_tags(AVFormatContext *s)
1190 MatroskaMuxContext *mkv = s->priv_data;
1191 ebml_master tags = {0};
1194 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1196 if (mkv_check_tag(s->metadata)) {
1197 ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
1198 if (ret < 0) return ret;
1201 for (i = 0; i < s->nb_streams; i++) {
1202 AVStream *st = s->streams[i];
1204 if (!mkv_check_tag(st->metadata))
1207 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
1208 if (ret < 0) return ret;
1211 for (i = 0; i < s->nb_chapters; i++) {
1212 AVChapter *ch = s->chapters[i];
1214 if (!mkv_check_tag(ch->metadata))
1217 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &tags);
1218 if (ret < 0) return ret;
1222 end_ebml_master(s->pb, tags);
1226 static int mkv_write_attachments(AVFormatContext *s)
1228 MatroskaMuxContext *mkv = s->priv_data;
1229 AVIOContext *pb = s->pb;
1230 ebml_master attachments;
1234 if (!mkv->have_attachments)
1237 av_lfg_init(&c, av_get_random_seed());
1239 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1240 if (ret < 0) return ret;
1242 attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0);
1244 for (i = 0; i < s->nb_streams; i++) {
1245 AVStream *st = s->streams[i];
1246 ebml_master attached_file;
1247 AVDictionaryEntry *t;
1248 const char *mimetype = NULL;
1251 if (st->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1254 attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0);
1256 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1257 put_ebml_string(pb, MATROSKA_ID_FILEDESC, t->value);
1258 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1259 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1260 return AVERROR(EINVAL);
1262 put_ebml_string(pb, MATROSKA_ID_FILENAME, t->value);
1263 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1264 mimetype = t->value;
1265 else if (st->codec->codec_id != AV_CODEC_ID_NONE ) {
1267 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1268 if (ff_mkv_mime_tags[i].id == st->codec->codec_id) {
1269 mimetype = ff_mkv_mime_tags[i].str;
1274 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1275 "it cannot be deduced from the codec id.\n", i);
1276 return AVERROR(EINVAL);
1279 if (s->flags & AVFMT_FLAG_BITEXACT) {
1280 struct AVSHA *sha = av_sha_alloc();
1283 return AVERROR(ENOMEM);
1284 av_sha_init(sha, 160);
1285 av_sha_update(sha, st->codec->extradata, st->codec->extradata_size);
1286 av_sha_final(sha, digest);
1288 fileuid = AV_RL64(digest);
1290 fileuid = av_lfg_get(&c);
1292 av_log(s, AV_LOG_VERBOSE, "Using %.16"PRIx64" for attachment %d\n",
1295 put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype);
1296 put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codec->extradata, st->codec->extradata_size);
1297 put_ebml_uint(pb, MATROSKA_ID_FILEUID, fileuid);
1298 end_ebml_master(pb, attached_file);
1300 end_ebml_master(pb, attachments);
1305 static int mkv_write_header(AVFormatContext *s)
1307 MatroskaMuxContext *mkv = s->priv_data;
1308 AVIOContext *pb = s->pb;
1309 ebml_master ebml_header, segment_info;
1310 AVDictionaryEntry *tag;
1311 int ret, i, version = 2;
1313 if (!strcmp(s->oformat->name, "webm"))
1314 mkv->mode = MODE_WEBM;
1316 mkv->mode = MODE_MATROSKAv2;
1318 if (s->avoid_negative_ts < 0)
1319 s->avoid_negative_ts = 1;
1321 if (mkv->mode != MODE_WEBM ||
1322 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1323 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1326 for (i = 0; i < s->nb_streams; i++) {
1327 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_ATRAC3 ||
1328 s->streams[i]->codec->codec_id == AV_CODEC_ID_COOK ||
1329 s->streams[i]->codec->codec_id == AV_CODEC_ID_RA_288 ||
1330 s->streams[i]->codec->codec_id == AV_CODEC_ID_SIPR ||
1331 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV10 ||
1332 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV20) {
1333 av_log(s, AV_LOG_ERROR,
1334 "The Matroska muxer does not yet support muxing %s\n",
1335 avcodec_get_name(s->streams[i]->codec->codec_id));
1336 return AVERROR_PATCHWELCOME;
1338 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_OPUS ||
1339 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1340 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1344 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1346 return AVERROR(ENOMEM);
1348 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1349 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1350 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1351 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1352 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1353 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1354 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1355 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1356 end_ebml_master(pb, ebml_header);
1358 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1359 mkv->segment_offset = avio_tell(pb);
1361 // we write 2 seek heads - one at the end of the file to point to each
1362 // cluster, and one at the beginning to point to all other level one
1363 // elements (including the seek head at the end of the file), which
1364 // isn't more than 10 elements if we only write one of each other
1365 // currently defined level 1 element
1366 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1367 if (!mkv->main_seekhead)
1368 return AVERROR(ENOMEM);
1370 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1371 if (ret < 0) return ret;
1373 segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
1374 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1375 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1376 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1377 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1378 uint32_t segment_uid[4];
1381 av_lfg_init(&lfg, av_get_random_seed());
1383 for (i = 0; i < 4; i++)
1384 segment_uid[i] = av_lfg_get(&lfg);
1386 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1387 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1388 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1390 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1391 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1393 const char *ident = "Lavf";
1394 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1395 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1398 if (tag = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
1399 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1400 int64_t date_utc = (ff_iso8601_to_unix_time(tag->value) - 978307200) * 1000000000;
1401 uint8_t date_utc_buf[8];
1402 AV_WB64(date_utc_buf, date_utc);
1403 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1406 // reserve space for the duration
1408 mkv->duration_offset = avio_tell(pb);
1409 put_ebml_void(pb, 11); // assumes double-precision float to be written
1410 end_ebml_master(pb, segment_info);
1412 ret = mkv_write_tracks(s);
1416 for (i = 0; i < s->nb_chapters; i++)
1417 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1419 if (mkv->mode != MODE_WEBM) {
1420 ret = mkv_write_chapters(s);
1424 ret = mkv_write_tags(s);
1428 ret = mkv_write_attachments(s);
1433 if (!s->pb->seekable)
1434 mkv_write_seekhead(pb, mkv->main_seekhead);
1436 mkv->cues = mkv_start_cues(mkv->segment_offset);
1438 return AVERROR(ENOMEM);
1440 if (pb->seekable && mkv->reserve_cues_space) {
1441 mkv->cues_pos = avio_tell(pb);
1442 put_ebml_void(pb, mkv->reserve_cues_space);
1445 av_init_packet(&mkv->cur_audio_pkt);
1446 mkv->cur_audio_pkt.size = 0;
1447 mkv->cluster_pos = -1;
1451 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1452 // after 4k and on a keyframe
1454 if (mkv->cluster_time_limit < 0)
1455 mkv->cluster_time_limit = 5000;
1456 if (mkv->cluster_size_limit < 0)
1457 mkv->cluster_size_limit = 5 * 1024 * 1024;
1459 if (mkv->cluster_time_limit < 0)
1460 mkv->cluster_time_limit = 1000;
1461 if (mkv->cluster_size_limit < 0)
1462 mkv->cluster_size_limit = 32 * 1024;
1468 static int mkv_blockgroup_size(int pkt_size)
1470 int size = pkt_size + 4;
1471 size += ebml_num_size(size);
1472 size += 2; // EBML ID for block and block duration
1473 size += 8; // max size of block duration
1474 size += ebml_num_size(size);
1475 size += 1; // blockgroup EBML ID
1479 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1486 dst = av_malloc(srclen);
1488 return AVERROR(ENOMEM);
1490 while (srclen >= WV_HEADER_SIZE) {
1493 ret = ff_wv_parse_header(&header, src);
1496 src += WV_HEADER_SIZE;
1497 srclen -= WV_HEADER_SIZE;
1499 if (srclen < header.blocksize) {
1500 ret = AVERROR_INVALIDDATA;
1504 if (header.initial) {
1505 AV_WL32(dst + offset, header.samples);
1508 AV_WL32(dst + offset, header.flags);
1509 AV_WL32(dst + offset + 4, header.crc);
1512 if (!(header.initial && header.final)) {
1513 AV_WL32(dst + offset, header.blocksize);
1517 memcpy(dst + offset, src, header.blocksize);
1518 src += header.blocksize;
1519 srclen -= header.blocksize;
1520 offset += header.blocksize;
1532 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1533 unsigned int blockid, AVPacket *pkt, int flags)
1535 MatroskaMuxContext *mkv = s->priv_data;
1536 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1537 uint8_t *data = NULL, *side_data = NULL;
1538 int offset = 0, size = pkt->size, side_data_size = 0;
1539 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1540 uint64_t additional_id = 0;
1541 int64_t discard_padding = 0;
1542 ebml_master block_group, block_additions, block_more;
1544 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1545 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1546 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, flags);
1547 if (codec->codec_id == AV_CODEC_ID_H264 && codec->extradata_size > 0 &&
1548 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1549 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1550 else if (codec->codec_id == AV_CODEC_ID_HEVC && codec->extradata_size > 6 &&
1551 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1552 /* extradata is Annex B, assume the bitstream is too and convert it */
1553 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1554 else if (codec->codec_id == AV_CODEC_ID_WAVPACK) {
1555 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
1557 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
1563 if (codec->codec_id == AV_CODEC_ID_PRORES) {
1564 /* Matroska specification requires to remove the first QuickTime atom
1570 side_data = av_packet_get_side_data(pkt,
1571 AV_PKT_DATA_SKIP_SAMPLES,
1574 if (side_data && side_data_size >= 10) {
1575 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
1576 (AVRational){1, codec->sample_rate},
1577 (AVRational){1, 1000000000});
1580 side_data = av_packet_get_side_data(pkt,
1581 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
1584 additional_id = AV_RB64(side_data);
1586 side_data_size -= 8;
1589 if ((side_data_size && additional_id == 1) || discard_padding) {
1590 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
1591 blockid = MATROSKA_ID_BLOCK;
1594 put_ebml_id(pb, blockid);
1595 put_ebml_num(pb, size + 4, 0);
1596 // this assumes stream_index is less than 126
1597 avio_w8(pb, 0x80 | (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1)));
1598 avio_wb16(pb, ts - mkv->cluster_pts);
1600 avio_write(pb, data + offset, size);
1601 if (data != pkt->data)
1604 if (discard_padding) {
1605 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
1608 if (side_data_size && additional_id == 1) {
1609 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
1610 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
1611 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
1612 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
1613 put_ebml_num(pb, side_data_size, 0);
1614 avio_write(pb, side_data, side_data_size);
1615 end_ebml_master(pb, block_more);
1616 end_ebml_master(pb, block_additions);
1618 if ((side_data_size && additional_id == 1) || discard_padding) {
1619 end_ebml_master(pb, block_group);
1623 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1625 MatroskaMuxContext *mkv = s->priv_data;
1626 ebml_master blockgroup;
1627 int id_size, settings_size, size;
1628 uint8_t *id, *settings;
1629 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1630 const int flags = 0;
1633 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
1637 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
1640 size = id_size + 1 + settings_size + 1 + pkt->size;
1642 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1643 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1644 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
1646 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1648 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1649 put_ebml_num(pb, size + 4, 0);
1650 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1651 avio_wb16(pb, ts - mkv->cluster_pts);
1653 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
1655 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
1656 end_ebml_master(pb, blockgroup);
1658 return pkt->duration;
1661 static void mkv_flush_dynbuf(AVFormatContext *s)
1663 MatroskaMuxContext *mkv = s->priv_data;
1670 bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
1671 avio_write(s->pb, dyn_buf, bufsize);
1676 static void mkv_start_new_cluster(AVFormatContext *s, AVPacket *pkt)
1678 MatroskaMuxContext *mkv = s->priv_data;
1681 if (s->pb->seekable) {
1687 av_log(s, AV_LOG_DEBUG,
1688 "Starting new cluster at offset %" PRIu64 " bytes, "
1689 "pts %" PRIu64 "dts %" PRIu64 "\n",
1690 avio_tell(pb), pkt->pts, pkt->dts);
1691 end_ebml_master(pb, mkv->cluster);
1692 mkv->cluster_pos = -1;
1694 mkv_flush_dynbuf(s);
1698 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
1700 MatroskaMuxContext *mkv = s->priv_data;
1701 AVIOContext *pb = s->pb;
1702 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1703 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1704 int duration = pkt->duration;
1706 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1707 int64_t relative_packet_pos;
1708 int dash_tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
1710 if (ts == AV_NOPTS_VALUE) {
1711 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
1712 return AVERROR(EINVAL);
1714 ts += mkv->tracks[pkt->stream_index].ts_offset;
1716 if (mkv->cluster_pos != -1) {
1717 int64_t cluster_time = ts - mkv->cluster_pts + mkv->tracks[pkt->stream_index].ts_offset;
1718 if ((int16_t)cluster_time != cluster_time) {
1719 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
1720 mkv_start_new_cluster(s, pkt);
1724 if (!s->pb->seekable) {
1726 ret = avio_open_dyn_buf(&mkv->dyn_bc);
1728 av_log(s, AV_LOG_ERROR, "Failed to open dynamic buffer\n");
1735 if (mkv->cluster_pos == -1) {
1736 mkv->cluster_pos = avio_tell(s->pb);
1737 mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
1738 put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
1739 mkv->cluster_pts = FFMAX(0, ts);
1742 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1744 if (codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1745 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe << 7);
1746 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue) {
1747 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
1748 if (ret < 0) return ret;
1751 if (codec->codec_id == AV_CODEC_ID_WEBVTT) {
1752 duration = mkv_write_vtt_blocks(s, pb, pkt);
1754 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1755 mkv_blockgroup_size(pkt->size));
1756 /* For backward compatibility, prefer convergence_duration. */
1757 if (pkt->convergence_duration > 0) {
1758 duration = pkt->convergence_duration;
1760 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 0);
1761 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1762 end_ebml_master(pb, blockgroup);
1765 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts,
1766 mkv->cluster_pos, relative_packet_pos, duration);
1771 mkv->duration = FFMAX(mkv->duration, ts + duration);
1775 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
1777 MatroskaMuxContext *mkv = s->priv_data;
1778 int codec_type = s->streams[pkt->stream_index]->codec->codec_type;
1779 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1781 int64_t cluster_time;
1783 int start_new_cluster;
1785 if (mkv->tracks[pkt->stream_index].write_dts)
1786 cluster_time = pkt->dts - mkv->cluster_pts;
1788 cluster_time = pkt->pts - mkv->cluster_pts;
1789 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
1791 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1792 // after 4k and on a keyframe
1793 if (s->pb->seekable) {
1794 cluster_size = avio_tell(s->pb) - mkv->cluster_pos;
1796 cluster_size = avio_tell(mkv->dyn_bc);
1799 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
1800 // WebM DASH specification states that the first block of every cluster
1801 // has to be a key frame. So for DASH video, we only create a cluster
1802 // on seeing key frames.
1803 start_new_cluster = keyframe;
1804 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
1805 (mkv->cluster_pos == -1 ||
1806 cluster_time > mkv->cluster_time_limit)) {
1807 // For DASH audio, we create a Cluster based on cluster_time_limit
1808 start_new_cluster = 1;
1809 } else if (!mkv->is_dash &&
1810 (cluster_size > mkv->cluster_size_limit ||
1811 cluster_time > mkv->cluster_time_limit ||
1812 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
1813 cluster_size > 4 * 1024))) {
1814 start_new_cluster = 1;
1816 start_new_cluster = 0;
1819 if (mkv->cluster_pos != -1 && start_new_cluster) {
1820 mkv_start_new_cluster(s, pkt);
1823 // check if we have an audio packet cached
1824 if (mkv->cur_audio_pkt.size > 0) {
1825 // for DASH audio, a CuePoint has to be added when there is a new cluster.
1826 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
1827 mkv->is_dash ? start_new_cluster : 0);
1828 av_free_packet(&mkv->cur_audio_pkt);
1830 av_log(s, AV_LOG_ERROR,
1831 "Could not write cached audio packet ret:%d\n", ret);
1836 // buffer an audio packet to ensure the packet containing the video
1837 // keyframe's timecode is contained in the same cluster for WebM
1838 if (codec_type == AVMEDIA_TYPE_AUDIO) {
1839 mkv->cur_audio_pkt = *pkt;
1841 mkv->cur_audio_pkt.buf = av_buffer_ref(pkt->buf);
1842 ret = mkv->cur_audio_pkt.buf ? 0 : AVERROR(ENOMEM);
1844 ret = av_dup_packet(&mkv->cur_audio_pkt);
1845 if (mkv->cur_audio_pkt.side_data_elems > 0) {
1846 ret = av_copy_packet_side_data(&mkv->cur_audio_pkt, &mkv->cur_audio_pkt);
1849 ret = mkv_write_packet_internal(s, pkt, 0);
1853 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
1855 MatroskaMuxContext *mkv = s->priv_data;
1857 if (s->pb->seekable)
1862 if (mkv->cluster_pos != -1) {
1863 av_log(s, AV_LOG_DEBUG,
1864 "Flushing cluster at offset %" PRIu64 " bytes\n",
1866 end_ebml_master(pb, mkv->cluster);
1867 mkv->cluster_pos = -1;
1869 mkv_flush_dynbuf(s);
1874 return mkv_write_packet(s, pkt);
1877 static int mkv_write_trailer(AVFormatContext *s)
1879 MatroskaMuxContext *mkv = s->priv_data;
1880 AVIOContext *pb = s->pb;
1881 int64_t currentpos, cuespos;
1884 // check if we have an audio packet cached
1885 if (mkv->cur_audio_pkt.size > 0) {
1886 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
1887 av_free_packet(&mkv->cur_audio_pkt);
1889 av_log(s, AV_LOG_ERROR,
1890 "Could not write cached audio packet ret:%d\n", ret);
1896 end_ebml_master(mkv->dyn_bc, mkv->cluster);
1897 mkv_flush_dynbuf(s);
1898 } else if (mkv->cluster_pos != -1) {
1899 end_ebml_master(pb, mkv->cluster);
1902 if (mkv->mode != MODE_WEBM) {
1903 ret = mkv_write_chapters(s);
1909 if (mkv->cues->num_entries) {
1910 if (mkv->reserve_cues_space) {
1913 currentpos = avio_tell(pb);
1914 avio_seek(pb, mkv->cues_pos, SEEK_SET);
1916 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
1917 cues_end = avio_tell(pb);
1918 if (cues_end > cuespos + mkv->reserve_cues_space) {
1919 av_log(s, AV_LOG_ERROR,
1920 "Insufficient space reserved for cues: %d "
1921 "(needed: %" PRId64 ").\n",
1922 mkv->reserve_cues_space, cues_end - cuespos);
1923 return AVERROR(EINVAL);
1926 if (cues_end < cuespos + mkv->reserve_cues_space)
1927 put_ebml_void(pb, mkv->reserve_cues_space -
1928 (cues_end - cuespos));
1930 avio_seek(pb, currentpos, SEEK_SET);
1932 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
1935 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES,
1941 mkv_write_seekhead(pb, mkv->main_seekhead);
1943 // update the duration
1944 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
1945 currentpos = avio_tell(pb);
1946 avio_seek(pb, mkv->duration_offset, SEEK_SET);
1947 put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
1949 avio_seek(pb, currentpos, SEEK_SET);
1952 end_ebml_master(pb, mkv->segment);
1953 av_freep(&mkv->tracks);
1954 av_freep(&mkv->cues->entries);
1955 av_freep(&mkv->cues);
1960 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
1963 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
1964 if (ff_mkv_codec_tags[i].id == codec_id)
1967 if (std_compliance < FF_COMPLIANCE_NORMAL) {
1968 enum AVMediaType type = avcodec_get_type(codec_id);
1969 // mkv theoretically supports any video/audio through VFW/ACM
1970 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
1977 static const AVCodecTag additional_audio_tags[] = {
1978 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
1979 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
1980 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
1981 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
1982 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
1983 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
1984 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
1985 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
1986 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
1987 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
1988 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
1989 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
1990 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
1993 static const AVCodecTag additional_video_tags[] = {
1994 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
1995 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
1996 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
1997 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
1998 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
1999 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2002 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2003 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2004 static const AVOption options[] = {
2005 { "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 },
2006 { "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 },
2007 { "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 },
2008 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
2009 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2010 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
2014 #if CONFIG_MATROSKA_MUXER
2015 static const AVClass matroska_class = {
2016 .class_name = "matroska muxer",
2017 .item_name = av_default_item_name,
2019 .version = LIBAVUTIL_VERSION_INT,
2022 AVOutputFormat ff_matroska_muxer = {
2024 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2025 .mime_type = "video/x-matroska",
2026 .extensions = "mkv",
2027 .priv_data_size = sizeof(MatroskaMuxContext),
2028 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2029 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2030 .video_codec = CONFIG_LIBX264_ENCODER ?
2031 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2032 .write_header = mkv_write_header,
2033 .write_packet = mkv_write_flush_packet,
2034 .write_trailer = mkv_write_trailer,
2035 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2036 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2037 .codec_tag = (const AVCodecTag* const []){
2038 ff_codec_bmp_tags, ff_codec_wav_tags,
2039 additional_audio_tags, additional_video_tags, 0
2041 .subtitle_codec = AV_CODEC_ID_ASS,
2042 .query_codec = mkv_query_codec,
2043 .priv_class = &matroska_class,
2047 #if CONFIG_WEBM_MUXER
2048 static const AVClass webm_class = {
2049 .class_name = "webm muxer",
2050 .item_name = av_default_item_name,
2052 .version = LIBAVUTIL_VERSION_INT,
2055 AVOutputFormat ff_webm_muxer = {
2057 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2058 .mime_type = "video/webm",
2059 .extensions = "webm",
2060 .priv_data_size = sizeof(MatroskaMuxContext),
2061 .audio_codec = AV_CODEC_ID_VORBIS,
2062 .video_codec = AV_CODEC_ID_VP8,
2063 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2064 .write_header = mkv_write_header,
2065 .write_packet = mkv_write_flush_packet,
2066 .write_trailer = mkv_write_trailer,
2067 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2068 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2069 .priv_class = &webm_class,
2073 #if CONFIG_MATROSKA_AUDIO_MUXER
2074 static const AVClass mka_class = {
2075 .class_name = "matroska audio muxer",
2076 .item_name = av_default_item_name,
2078 .version = LIBAVUTIL_VERSION_INT,
2080 AVOutputFormat ff_matroska_audio_muxer = {
2082 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2083 .mime_type = "audio/x-matroska",
2084 .extensions = "mka",
2085 .priv_data_size = sizeof(MatroskaMuxContext),
2086 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2087 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2088 .video_codec = AV_CODEC_ID_NONE,
2089 .write_header = mkv_write_header,
2090 .write_packet = mkv_write_flush_packet,
2091 .write_trailer = mkv_write_trailer,
2092 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2094 .codec_tag = (const AVCodecTag* const []){
2095 ff_codec_wav_tags, additional_audio_tags, 0
2097 .priv_class = &mka_class,