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/mastering_display_metadata.h"
45 #include "libavutil/mathematics.h"
46 #include "libavutil/opt.h"
47 #include "libavutil/parseutils.h"
48 #include "libavutil/random_seed.h"
49 #include "libavutil/rational.h"
50 #include "libavutil/samplefmt.h"
51 #include "libavutil/sha.h"
52 #include "libavutil/stereo3d.h"
54 #include "libavcodec/xiph.h"
55 #include "libavcodec/mpeg4audio.h"
56 #include "libavcodec/internal.h"
58 typedef struct ebml_master {
59 int64_t pos; ///< absolute offset in the file where the master's elements start
60 int sizebytes; ///< how many bytes were reserved for the size
63 typedef struct mkv_seekhead_entry {
64 unsigned int elementid;
68 typedef struct mkv_seekhead {
70 int64_t segment_offset; ///< the file offset to the beginning of the segment
71 int reserved_size; ///< -1 if appending to file
73 mkv_seekhead_entry *entries;
77 typedef struct mkv_cuepoint {
81 int64_t cluster_pos; ///< file offset of the cluster containing the block
82 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
83 int64_t duration; ///< duration of the block according to time base
86 typedef struct mkv_cues {
87 int64_t segment_offset;
88 mkv_cuepoint *entries;
92 typedef struct mkv_track {
98 #define MODE_MATROSKAv2 0x01
99 #define MODE_WEBM 0x02
101 /** Maximum number of tracks allowed in a Matroska file (with track numbers in
102 * range 1 to 126 (inclusive) */
103 #define MAX_TRACKS 126
105 typedef struct MatroskaMuxContext {
106 const AVClass *class;
110 int64_t segment_offset;
112 int64_t cluster_pos; ///< file offset of the current cluster
114 int64_t duration_offset;
116 mkv_seekhead *main_seekhead;
120 AVPacket cur_audio_pkt;
122 int have_attachments;
125 int reserve_cues_space;
126 int cluster_size_limit;
128 int64_t cluster_time_limit;
130 int dash_track_number;
133 uint32_t chapter_id_offset;
136 int64_t last_track_timestamp[MAX_TRACKS];
138 int64_t* stream_durations;
139 int64_t* stream_duration_offsets;
142 } MatroskaMuxContext;
145 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
146 * offset, 4 bytes for target EBML ID */
147 #define MAX_SEEKENTRY_SIZE 21
149 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 4
151 #define MAX_CUETRACKPOS_SIZE 42
153 /** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */
154 #define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE * num_tracks
156 /** Seek preroll value for opus */
157 #define OPUS_SEEK_PREROLL 80000000
159 static int ebml_id_size(unsigned int id)
161 return (av_log2(id + 1) - 1) / 7 + 1;
164 static void put_ebml_id(AVIOContext *pb, unsigned int id)
166 int i = ebml_id_size(id);
168 avio_w8(pb, (uint8_t)(id >> (i * 8)));
172 * Write an EBML size meaning "unknown size".
174 * @param bytes The number of bytes the size should occupy (maximum: 8).
176 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
178 av_assert0(bytes <= 8);
179 avio_w8(pb, 0x1ff >> bytes);
180 ffio_fill(pb, 0xff, bytes - 1);
184 * Calculate how many bytes are needed to represent a given number in EBML.
186 static int ebml_num_size(uint64_t num)
189 while ((num + 1) >> bytes * 7)
195 * Write a number in EBML variable length format.
197 * @param bytes The number of bytes that need to be used to write the number.
198 * If zero, any number of bytes can be used.
200 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
202 int i, needed_bytes = ebml_num_size(num);
204 // sizes larger than this are currently undefined in EBML
205 av_assert0(num < (1ULL << 56) - 1);
208 // don't care how many bytes are used, so use the min
209 bytes = needed_bytes;
210 // the bytes needed to write the given size would exceed the bytes
211 // that we need to use, so write unknown size. This shouldn't happen.
212 av_assert0(bytes >= needed_bytes);
214 num |= 1ULL << bytes * 7;
215 for (i = bytes - 1; i >= 0; i--)
216 avio_w8(pb, (uint8_t)(num >> i * 8));
219 static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val)
226 put_ebml_id(pb, elementid);
227 put_ebml_num(pb, bytes, 0);
228 for (i = bytes - 1; i >= 0; i--)
229 avio_w8(pb, (uint8_t)(val >> i * 8));
232 static void put_ebml_sint(AVIOContext *pb, unsigned int elementid, int64_t val)
235 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
237 while (tmp>>=8) bytes++;
239 put_ebml_id(pb, elementid);
240 put_ebml_num(pb, bytes, 0);
241 for (i = bytes - 1; i >= 0; i--)
242 avio_w8(pb, (uint8_t)(val >> i * 8));
245 static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val)
247 put_ebml_id(pb, elementid);
248 put_ebml_num(pb, 8, 0);
249 avio_wb64(pb, av_double2int(val));
252 static void put_ebml_binary(AVIOContext *pb, unsigned int elementid,
253 const void *buf, int size)
255 put_ebml_id(pb, elementid);
256 put_ebml_num(pb, size, 0);
257 avio_write(pb, buf, size);
260 static void put_ebml_string(AVIOContext *pb, unsigned int elementid,
263 put_ebml_binary(pb, elementid, str, strlen(str));
267 * Write a void element of a given size. Useful for reserving space in
268 * the file to be written to later.
270 * @param size The number of bytes to reserve, which must be at least 2.
272 static void put_ebml_void(AVIOContext *pb, uint64_t size)
274 int64_t currentpos = avio_tell(pb);
276 av_assert0(size >= 2);
278 put_ebml_id(pb, EBML_ID_VOID);
279 // we need to subtract the length needed to store the size from the
280 // size we need to reserve so 2 cases, we use 8 bytes to store the
281 // size if possible, 1 byte otherwise
283 put_ebml_num(pb, size - 2, 0);
285 put_ebml_num(pb, size - 9, 8);
286 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
289 static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid,
290 uint64_t expectedsize)
292 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
293 put_ebml_id(pb, elementid);
294 put_ebml_size_unknown(pb, bytes);
295 return (ebml_master) {avio_tell(pb), bytes };
298 static void end_ebml_master(AVIOContext *pb, ebml_master master)
300 int64_t pos = avio_tell(pb);
302 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
304 put_ebml_num(pb, pos - master.pos, master.sizebytes);
305 avio_seek(pb, pos, SEEK_SET);
308 static void put_xiph_size(AVIOContext *pb, int size)
310 ffio_fill(pb, 255, size / 255);
311 avio_w8(pb, size % 255);
315 * Free the members allocated in the mux context.
317 static void mkv_free(MatroskaMuxContext *mkv) {
318 if (mkv->main_seekhead) {
319 av_freep(&mkv->main_seekhead->entries);
320 av_freep(&mkv->main_seekhead);
323 av_freep(&mkv->cues->entries);
324 av_freep(&mkv->cues);
326 av_freep(&mkv->tracks);
327 av_freep(&mkv->stream_durations);
328 av_freep(&mkv->stream_duration_offsets);
332 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
333 * elements. If a maximum number of elements is specified, enough space
334 * will be reserved at the current file location to write a seek head of
337 * @param segment_offset The absolute offset to the position in the file
338 * where the segment begins.
339 * @param numelements The maximum number of elements that will be indexed
340 * by this seek head, 0 if unlimited.
342 static mkv_seekhead *mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset,
345 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
349 new_seekhead->segment_offset = segment_offset;
351 if (numelements > 0) {
352 new_seekhead->filepos = avio_tell(pb);
353 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
354 // and size, and 3 bytes to guarantee that an EBML void element
355 // will fit afterwards
356 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 13;
357 new_seekhead->max_entries = numelements;
358 put_ebml_void(pb, new_seekhead->reserved_size);
363 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
365 mkv_seekhead_entry *entries = seekhead->entries;
367 // don't store more elements than we reserved space for
368 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
371 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
373 return AVERROR(ENOMEM);
374 seekhead->entries = entries;
376 seekhead->entries[seekhead->num_entries].elementid = elementid;
377 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
383 * Write the seek head to the file and free it. If a maximum number of
384 * elements was specified to mkv_start_seekhead(), the seek head will
385 * be written at the location reserved for it. Otherwise, it is written
386 * at the current location in the file.
388 * @return The file offset where the seekhead was written,
389 * -1 if an error occurred.
391 static int64_t mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv)
393 mkv_seekhead *seekhead = mkv->main_seekhead;
394 ebml_master metaseek, seekentry;
398 currentpos = avio_tell(pb);
400 if (seekhead->reserved_size > 0) {
401 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
407 metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size);
408 for (i = 0; i < seekhead->num_entries; i++) {
409 mkv_seekhead_entry *entry = &seekhead->entries[i];
411 seekentry = start_ebml_master(pb, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
413 put_ebml_id(pb, MATROSKA_ID_SEEKID);
414 put_ebml_num(pb, ebml_id_size(entry->elementid), 0);
415 put_ebml_id(pb, entry->elementid);
417 put_ebml_uint(pb, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
418 end_ebml_master(pb, seekentry);
420 end_ebml_master(pb, metaseek);
422 if (seekhead->reserved_size > 0) {
423 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
424 put_ebml_void(pb, remaining);
425 avio_seek(pb, currentpos, SEEK_SET);
427 currentpos = seekhead->filepos;
430 av_freep(&mkv->main_seekhead->entries);
431 av_freep(&mkv->main_seekhead);
436 static mkv_cues *mkv_start_cues(int64_t segment_offset)
438 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
442 cues->segment_offset = segment_offset;
446 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
447 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
449 mkv_cuepoint *entries = cues->entries;
454 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
456 return AVERROR(ENOMEM);
457 cues->entries = entries;
459 cues->entries[cues->num_entries].pts = ts;
460 cues->entries[cues->num_entries].stream_idx = stream;
461 cues->entries[cues->num_entries].tracknum = tracknum;
462 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
463 cues->entries[cues->num_entries].relative_pos = relative_pos;
464 cues->entries[cues->num_entries++].duration = duration;
469 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
471 AVIOContext *pb = s->pb;
472 ebml_master cues_element;
476 currentpos = avio_tell(pb);
477 cues_element = start_ebml_master(pb, MATROSKA_ID_CUES, 0);
479 for (i = 0; i < cues->num_entries; i++) {
480 ebml_master cuepoint, track_positions;
481 mkv_cuepoint *entry = &cues->entries[i];
482 uint64_t pts = entry->pts;
485 // Calculate the number of entries, so we know the element size
486 for (j = 0; j < num_tracks; j++)
487 tracks[j].has_cue = 0;
488 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
489 int tracknum = entry[j].stream_idx;
490 av_assert0(tracknum>=0 && tracknum<num_tracks);
491 if (tracks[tracknum].has_cue && s->streams[tracknum]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
493 tracks[tracknum].has_cue = 1;
497 cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(ctp_nb));
498 put_ebml_uint(pb, MATROSKA_ID_CUETIME, pts);
500 // put all the entries from different tracks that have the exact same
501 // timestamp into the same CuePoint
502 for (j = 0; j < num_tracks; j++)
503 tracks[j].has_cue = 0;
504 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
505 int tracknum = entry[j].stream_idx;
506 av_assert0(tracknum>=0 && tracknum<num_tracks);
507 if (tracks[tracknum].has_cue && s->streams[tracknum]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
509 tracks[tracknum].has_cue = 1;
510 track_positions = start_ebml_master(pb, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
511 put_ebml_uint(pb, MATROSKA_ID_CUETRACK , entry[j].tracknum );
512 put_ebml_uint(pb, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
513 put_ebml_uint(pb, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
514 if (entry[j].duration != -1)
515 put_ebml_uint(pb, MATROSKA_ID_CUEDURATION , entry[j].duration);
516 end_ebml_master(pb, track_positions);
519 end_ebml_master(pb, cuepoint);
521 end_ebml_master(pb, cues_element);
526 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
528 const uint8_t *header_start[3];
530 int first_header_size;
533 if (par->codec_id == AV_CODEC_ID_VORBIS)
534 first_header_size = 30;
536 first_header_size = 42;
538 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
539 first_header_size, header_start, header_len) < 0) {
540 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
544 avio_w8(pb, 2); // number packets - 1
545 for (j = 0; j < 2; j++) {
546 put_xiph_size(pb, header_len[j]);
548 for (j = 0; j < 3; j++)
549 avio_write(pb, header_start[j], header_len[j]);
554 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
556 if (par->extradata && par->extradata_size == 2)
557 avio_write(pb, par->extradata, 2);
559 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
563 static int put_flac_codecpriv(AVFormatContext *s,
564 AVIOContext *pb, AVCodecParameters *par)
566 int write_comment = (par->channel_layout &&
567 !(par->channel_layout & ~0x3ffffULL) &&
568 !ff_flac_is_native_layout(par->channel_layout));
569 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
576 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
577 "Lavf" : LIBAVFORMAT_IDENT;
578 AVDictionary *dict = NULL;
579 uint8_t buf[32], *data, *p;
582 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
583 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
585 len = ff_vorbiscomment_length(dict, vendor);
586 if (len >= ((1<<24) - 4))
587 return AVERROR(EINVAL);
589 data = av_malloc(len + 4);
592 return AVERROR(ENOMEM);
596 AV_WB24(data + 1, len);
599 ff_vorbiscomment_write(&p, &dict, vendor);
601 avio_write(pb, data, len + 4);
610 static int get_aac_sample_rates(AVFormatContext *s, AVCodecParameters *par,
611 int *sample_rate, int *output_sample_rate)
613 MPEG4AudioConfig mp4ac;
615 if (avpriv_mpeg4audio_get_config(&mp4ac, par->extradata,
616 par->extradata_size * 8, 1) < 0) {
617 av_log(s, AV_LOG_ERROR,
618 "Error parsing AAC extradata, unable to determine samplerate.\n");
619 return AVERROR(EINVAL);
622 *sample_rate = mp4ac.sample_rate;
623 *output_sample_rate = mp4ac.ext_sample_rate;
627 static int mkv_write_native_codecprivate(AVFormatContext *s,
628 AVCodecParameters *par,
631 switch (par->codec_id) {
632 case AV_CODEC_ID_VORBIS:
633 case AV_CODEC_ID_THEORA:
634 return put_xiph_codecpriv(s, dyn_cp, par);
635 case AV_CODEC_ID_FLAC:
636 return put_flac_codecpriv(s, dyn_cp, par);
637 case AV_CODEC_ID_WAVPACK:
638 return put_wv_codecpriv(dyn_cp, par);
639 case AV_CODEC_ID_H264:
640 return ff_isom_write_avcc(dyn_cp, par->extradata,
641 par->extradata_size);
642 case AV_CODEC_ID_HEVC:
643 ff_isom_write_hvcc(dyn_cp, par->extradata,
644 par->extradata_size, 0);
646 case AV_CODEC_ID_ALAC:
647 if (par->extradata_size < 36) {
648 av_log(s, AV_LOG_ERROR,
649 "Invalid extradata found, ALAC expects a 36-byte "
651 return AVERROR_INVALIDDATA;
653 avio_write(dyn_cp, par->extradata + 12,
654 par->extradata_size - 12);
657 if (par->codec_id == AV_CODEC_ID_PRORES &&
658 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
659 avio_wl32(dyn_cp, par->codec_tag);
660 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
661 avio_write(dyn_cp, par->extradata, par->extradata_size);
667 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
668 AVCodecParameters *par,
669 int native_id, int qt_id)
673 int ret, codecpriv_size;
675 ret = avio_open_dyn_buf(&dyn_cp);
680 ret = mkv_write_native_codecprivate(s, par, dyn_cp);
681 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
684 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
686 if (par->extradata_size) {
687 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
688 && ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id
691 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
692 avio_wl32(dyn_cp, par->codec_tag);
693 for(i = 0; i < 0x5a - 8; i++)
696 avio_write(dyn_cp, par->extradata, par->extradata_size);
699 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
700 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
701 avcodec_get_name(par->codec_id));
704 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
706 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
707 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
708 avcodec_get_name(par->codec_id));
709 ret = AVERROR(EINVAL);
712 ff_put_bmp_header(dyn_cp, par, ff_codec_bmp_tags, 0, 0);
714 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
716 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
718 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
719 avcodec_get_name(par->codec_id));
720 ret = AVERROR(EINVAL);
723 par->codec_tag = tag;
725 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
728 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
730 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
736 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
737 int side_data_size = 0;
738 const uint8_t *side_data = av_stream_get_side_data(
739 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA, &side_data_size);
740 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, 0);
742 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
743 par->color_trc < AVCOL_TRC_NB) {
744 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
747 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
748 par->color_space < AVCOL_SPC_NB) {
749 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
751 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
752 par->color_primaries < AVCOL_PRI_NB) {
753 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
755 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
756 par->color_range < AVCOL_RANGE_NB) {
757 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
759 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
760 ebml_master meta_element = start_ebml_master(
761 pb, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
762 const AVMasteringDisplayMetadata *metadata =
763 (const AVMasteringDisplayMetadata*)side_data;
764 if (metadata->has_primaries) {
765 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_RX,
766 av_q2d(metadata->display_primaries[0][0]));
767 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_RY,
768 av_q2d(metadata->display_primaries[0][1]));
769 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_GX,
770 av_q2d(metadata->display_primaries[1][0]));
771 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_GY,
772 av_q2d(metadata->display_primaries[1][1]));
773 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_BX,
774 av_q2d(metadata->display_primaries[2][0]));
775 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_BY,
776 av_q2d(metadata->display_primaries[2][1]));
777 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_WHITEX,
778 av_q2d(metadata->white_point[0]));
779 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_WHITEY,
780 av_q2d(metadata->white_point[1]));
782 if (metadata->has_luminance) {
783 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
784 av_q2d(metadata->max_luminance));
785 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
786 av_q2d(metadata->min_luminance));
788 end_ebml_master(pb, meta_element);
790 end_ebml_master(pb, colorinfo);
794 static void mkv_write_field_order(AVIOContext *pb,
795 enum AVFieldOrder field_order)
797 switch (field_order) {
798 case AV_FIELD_UNKNOWN:
799 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
800 MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED);
802 case AV_FIELD_PROGRESSIVE:
803 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
804 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
810 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
811 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
812 switch (field_order) {
814 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
815 MATROSKA_VIDEO_FIELDORDER_TT);
818 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
819 MATROSKA_VIDEO_FIELDORDER_BB);
822 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
823 MATROSKA_VIDEO_FIELDORDER_TB);
826 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
827 MATROSKA_VIDEO_FIELDORDER_BT);
833 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
834 AVStream *st, int mode, int *h_width, int *h_height)
838 AVDictionaryEntry *tag;
839 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
843 // convert metadata into proper side data and add it to the stream
844 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
845 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
846 int stereo_mode = atoi(tag->value);
848 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
849 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
854 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
855 stereo_mode != 10 && stereo_mode != 12) {
856 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
862 // iterate to find the stereo3d side data
863 for (i = 0; i < st->nb_side_data; i++) {
864 AVPacketSideData sd = st->side_data[i];
865 if (sd.type == AV_PKT_DATA_STEREO3D) {
866 AVStereo3D *stereo = (AVStereo3D *)sd.data;
868 switch (stereo->type) {
870 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
872 case AV_STEREO3D_SIDEBYSIDE:
873 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
874 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
875 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
878 case AV_STEREO3D_TOPBOTTOM:
879 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
880 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
884 case AV_STEREO3D_CHECKERBOARD:
885 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
886 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
889 case AV_STEREO3D_LINES:
890 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
891 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
895 case AV_STEREO3D_COLUMNS:
896 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
897 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
901 case AV_STEREO3D_FRAMESEQUENCE:
902 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
903 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
911 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
914 // if webm, do not write unsupported modes
915 if ((mode == MODE_WEBM &&
916 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
917 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
918 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
919 av_log(s, AV_LOG_ERROR,
920 "The specified stereo mode is not valid.\n");
921 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
922 return AVERROR(EINVAL);
925 // write StereoMode if format is valid
926 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
931 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
932 int i, AVIOContext *pb, int default_stream_exists)
934 AVStream *st = s->streams[i];
935 AVCodecParameters *par = st->codecpar;
936 ebml_master subinfo, track;
939 int bit_depth = av_get_bits_per_sample(par->codec_id);
940 int sample_rate = par->sample_rate;
941 int output_sample_rate = 0;
942 int display_width_div = 1;
943 int display_height_div = 1;
945 AVDictionaryEntry *tag;
947 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
948 mkv->have_attachments = 1;
952 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
953 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
954 if (par->bits_per_raw_sample)
955 bit_depth = par->bits_per_raw_sample;
957 bit_depth = av_get_bytes_per_sample(par->format) << 3;
960 bit_depth = par->bits_per_coded_sample;
963 if (par->codec_id == AV_CODEC_ID_AAC) {
964 ret = get_aac_sample_rates(s, par, &sample_rate, &output_sample_rate);
969 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
970 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
971 mkv->is_dash ? mkv->dash_track_number : i + 1);
972 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
973 mkv->is_dash ? mkv->dash_track_number : i + 1);
974 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
976 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
977 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
978 tag = av_dict_get(st->metadata, "language", NULL, 0);
979 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
980 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
981 } else if (tag && tag->value) {
982 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
985 // The default value for TRACKFLAGDEFAULT is 1, so add element
986 // if we need to clear it.
987 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
988 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
990 if (st->disposition & AV_DISPOSITION_FORCED)
991 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
993 if (mkv->mode == MODE_WEBM && par->codec_id == AV_CODEC_ID_WEBVTT) {
994 const char *codec_id;
995 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
996 codec_id = "D_WEBVTT/CAPTIONS";
997 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
998 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
999 codec_id = "D_WEBVTT/DESCRIPTIONS";
1000 native_id = MATROSKA_TRACK_TYPE_METADATA;
1001 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1002 codec_id = "D_WEBVTT/METADATA";
1003 native_id = MATROSKA_TRACK_TYPE_METADATA;
1005 codec_id = "D_WEBVTT/SUBTITLES";
1006 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1008 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1010 // look for a codec ID string specific to mkv to use,
1011 // if none are found, use AVI codes
1012 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1013 if (ff_mkv_codec_tags[j].id == par->codec_id) {
1014 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1019 if (par->codec_id == AV_CODEC_ID_RAWVIDEO && !par->codec_tag) {
1020 if (mkv->allow_raw_vfw) {
1023 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1024 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1025 return AVERROR(EINVAL);
1030 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1031 int64_t codecdelay = av_rescale_q(par->initial_padding,
1032 (AVRational){ 1, 48000 },
1033 (AVRational){ 1, 1000000000 });
1034 if (codecdelay < 0) {
1035 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1036 return AVERROR(EINVAL);
1038 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1039 // (AVRational){ 1, par->sample_rate },
1042 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1044 if (par->codec_id == AV_CODEC_ID_OPUS) {
1045 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1048 if (mkv->mode == MODE_WEBM && !(par->codec_id == AV_CODEC_ID_VP8 ||
1049 par->codec_id == AV_CODEC_ID_VP9 ||
1050 par->codec_id == AV_CODEC_ID_OPUS ||
1051 par->codec_id == AV_CODEC_ID_VORBIS ||
1052 par->codec_id == AV_CODEC_ID_WEBVTT)) {
1053 av_log(s, AV_LOG_ERROR,
1054 "Only VP8 or VP9 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1055 return AVERROR(EINVAL);
1058 switch (par->codec_type) {
1059 case AVMEDIA_TYPE_VIDEO:
1060 mkv->have_video = 1;
1061 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1063 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1064 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1065 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1067 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->time_base.num / st->time_base.den);
1070 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1071 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1072 par->codec_id == AV_CODEC_ID_SVQ1 ||
1073 par->codec_id == AV_CODEC_ID_SVQ3 ||
1074 par->codec_id == AV_CODEC_ID_CINEPAK))
1078 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1079 else if (!native_id) {
1080 // if there is no mkv-specific codec ID, use VFW mode
1081 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1082 mkv->tracks[i].write_dts = 1;
1083 s->internal->avoid_negative_ts_use_pts = 0;
1086 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1088 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1089 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1091 if (mkv->mode != MODE_WEBM)
1092 mkv_write_field_order(pb, par->field_order);
1094 // check both side data and metadata for stereo information,
1095 // write the result to the bitstream if any is found
1096 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1098 &display_height_div);
1102 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1103 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1104 (par->format == AV_PIX_FMT_YUVA420P)) {
1105 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1108 // write DisplayWidth and DisplayHeight, they contain the size of
1109 // a single source view and/or the display aspect ratio
1110 if (st->sample_aspect_ratio.num) {
1111 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1112 if (d_width > INT_MAX) {
1113 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1114 return AVERROR(EINVAL);
1116 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1117 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1118 } else if (display_width_div != 1 || display_height_div != 1) {
1119 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1120 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1123 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1124 uint32_t color_space = av_le2ne32(par->codec_tag);
1125 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1127 if (s->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
1128 mkv_write_video_color(pb, par, st);
1130 end_ebml_master(pb, subinfo);
1133 case AVMEDIA_TYPE_AUDIO:
1134 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1137 // no mkv-specific ID, use ACM mode
1138 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1140 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1141 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1142 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1143 if (output_sample_rate)
1144 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1146 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1147 end_ebml_master(pb, subinfo);
1150 case AVMEDIA_TYPE_SUBTITLE:
1152 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1153 return AVERROR(ENOSYS);
1156 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1157 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1159 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1162 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1163 return AVERROR(EINVAL);
1166 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1167 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1172 end_ebml_master(pb, track);
1177 static int mkv_write_tracks(AVFormatContext *s)
1179 MatroskaMuxContext *mkv = s->priv_data;
1180 AVIOContext *pb = s->pb;
1182 int i, ret, default_stream_exists = 0;
1184 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
1188 tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
1189 for (i = 0; i < s->nb_streams; i++) {
1190 AVStream *st = s->streams[i];
1191 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1193 for (i = 0; i < s->nb_streams; i++) {
1194 ret = mkv_write_track(s, mkv, i, pb, default_stream_exists);
1198 end_ebml_master(pb, tracks);
1202 static int mkv_write_chapters(AVFormatContext *s)
1204 MatroskaMuxContext *mkv = s->priv_data;
1205 AVIOContext *pb = s->pb;
1206 ebml_master chapters, editionentry;
1207 AVRational scale = {1, 1E9};
1210 if (!s->nb_chapters || mkv->wrote_chapters)
1213 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1214 if (ret < 0) return ret;
1216 chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
1217 editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
1218 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1219 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1220 for (i = 0; i < s->nb_chapters; i++) {
1221 ebml_master chapteratom, chapterdisplay;
1222 AVChapter *c = s->chapters[i];
1223 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1224 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1225 AVDictionaryEntry *t = NULL;
1226 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1227 av_log(s, AV_LOG_ERROR,
1228 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1229 chapterstart, chapterend);
1230 return AVERROR_INVALIDDATA;
1233 chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
1234 put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1235 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1236 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1237 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1238 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1239 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1240 chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
1241 put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
1242 put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und");
1243 end_ebml_master(pb, chapterdisplay);
1245 end_ebml_master(pb, chapteratom);
1247 end_ebml_master(pb, editionentry);
1248 end_ebml_master(pb, chapters);
1250 mkv->wrote_chapters = 1;
1254 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1256 uint8_t *key = av_strdup(t->key);
1258 const uint8_t *lang = NULL;
1262 return AVERROR(ENOMEM);
1264 if ((p = strrchr(p, '-')) &&
1265 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1272 else if (*p >= 'a' && *p <= 'z')
1277 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1278 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1280 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1281 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1282 end_ebml_master(pb, tag);
1288 static int mkv_write_tag_targets(AVFormatContext *s,
1289 unsigned int elementid, unsigned int uid,
1290 ebml_master *tags, ebml_master* tag)
1292 MatroskaMuxContext *mkv = s->priv_data;
1293 ebml_master targets;
1297 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1298 if (ret < 0) return ret;
1300 *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
1303 *tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
1304 targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
1306 put_ebml_uint(s->pb, elementid, uid);
1307 end_ebml_master(s->pb, targets);
1311 static int mkv_check_tag_name(const char *name, unsigned int elementid)
1313 return av_strcasecmp(name, "title") &&
1314 av_strcasecmp(name, "stereo_mode") &&
1315 av_strcasecmp(name, "creation_time") &&
1316 av_strcasecmp(name, "encoding_tool") &&
1317 av_strcasecmp(name, "duration") &&
1318 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1319 av_strcasecmp(name, "language"));
1322 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
1323 unsigned int uid, ebml_master *tags)
1327 AVDictionaryEntry *t = NULL;
1329 ret = mkv_write_tag_targets(s, elementid, uid, tags, &tag);
1333 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1334 if (mkv_check_tag_name(t->key, elementid)) {
1335 ret = mkv_write_simpletag(s->pb, t);
1341 end_ebml_master(s->pb, tag);
1345 static int mkv_check_tag(AVDictionary *m, unsigned int elementid)
1347 AVDictionaryEntry *t = NULL;
1349 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1350 if (mkv_check_tag_name(t->key, elementid))
1356 static int mkv_write_tags(AVFormatContext *s)
1358 MatroskaMuxContext *mkv = s->priv_data;
1359 ebml_master tags = {0};
1362 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1364 if (mkv_check_tag(s->metadata, 0)) {
1365 ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
1366 if (ret < 0) return ret;
1369 for (i = 0; i < s->nb_streams; i++) {
1370 AVStream *st = s->streams[i];
1372 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1375 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
1376 if (ret < 0) return ret;
1379 if (!mkv->is_live) {
1380 for (i = 0; i < s->nb_streams; i++) {
1381 ebml_master tag_target;
1384 mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags, &tag_target);
1386 tag = start_ebml_master(s->pb, MATROSKA_ID_SIMPLETAG, 0);
1387 put_ebml_string(s->pb, MATROSKA_ID_TAGNAME, "DURATION");
1388 mkv->stream_duration_offsets[i] = avio_tell(s->pb);
1390 // Reserve space to write duration as a 20-byte string.
1391 // 2 (ebml id) + 1 (data size) + 20 (data)
1392 put_ebml_void(s->pb, 23);
1393 end_ebml_master(s->pb, tag);
1394 end_ebml_master(s->pb, tag_target);
1398 for (i = 0; i < s->nb_chapters; i++) {
1399 AVChapter *ch = s->chapters[i];
1401 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1404 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &tags);
1405 if (ret < 0) return ret;
1409 end_ebml_master(s->pb, tags);
1413 static int mkv_write_attachments(AVFormatContext *s)
1415 MatroskaMuxContext *mkv = s->priv_data;
1416 AVIOContext *pb = s->pb;
1417 ebml_master attachments;
1421 if (!mkv->have_attachments)
1424 av_lfg_init(&c, av_get_random_seed());
1426 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1427 if (ret < 0) return ret;
1429 attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0);
1431 for (i = 0; i < s->nb_streams; i++) {
1432 AVStream *st = s->streams[i];
1433 ebml_master attached_file;
1434 AVDictionaryEntry *t;
1435 const char *mimetype = NULL;
1438 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1441 attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0);
1443 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1444 put_ebml_string(pb, MATROSKA_ID_FILEDESC, t->value);
1445 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1446 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1447 return AVERROR(EINVAL);
1449 put_ebml_string(pb, MATROSKA_ID_FILENAME, t->value);
1450 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1451 mimetype = t->value;
1452 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1454 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1455 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1456 mimetype = ff_mkv_mime_tags[i].str;
1459 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1460 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1461 mimetype = ff_mkv_image_mime_tags[i].str;
1466 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1467 "it cannot be deduced from the codec id.\n", i);
1468 return AVERROR(EINVAL);
1471 if (s->flags & AVFMT_FLAG_BITEXACT) {
1472 struct AVSHA *sha = av_sha_alloc();
1475 return AVERROR(ENOMEM);
1476 av_sha_init(sha, 160);
1477 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1478 av_sha_final(sha, digest);
1480 fileuid = AV_RL64(digest);
1482 fileuid = av_lfg_get(&c);
1484 av_log(s, AV_LOG_VERBOSE, "Using %.16"PRIx64" for attachment %d\n",
1487 put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype);
1488 put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1489 put_ebml_uint(pb, MATROSKA_ID_FILEUID, fileuid);
1490 end_ebml_master(pb, attached_file);
1492 end_ebml_master(pb, attachments);
1497 static int64_t get_metadata_duration(AVFormatContext *s)
1503 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1504 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1505 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1509 for (i = 0; i < s->nb_streams; i++) {
1511 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1513 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1514 max = FFMAX(max, us);
1517 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1521 static int mkv_write_header(AVFormatContext *s)
1523 MatroskaMuxContext *mkv = s->priv_data;
1524 AVIOContext *pb = s->pb;
1525 ebml_master ebml_header, segment_info;
1526 AVDictionaryEntry *tag;
1527 int ret, i, version = 2;
1528 int64_t creation_time;
1530 if (!strcmp(s->oformat->name, "webm"))
1531 mkv->mode = MODE_WEBM;
1533 mkv->mode = MODE_MATROSKAv2;
1535 if (mkv->mode != MODE_WEBM ||
1536 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1537 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1540 for (i = 0; i < s->nb_streams; i++) {
1541 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
1542 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
1543 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
1544 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
1545 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
1546 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
1547 av_log(s, AV_LOG_ERROR,
1548 "The Matroska muxer does not yet support muxing %s\n",
1549 avcodec_get_name(s->streams[i]->codecpar->codec_id));
1550 return AVERROR_PATCHWELCOME;
1552 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1553 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1554 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1558 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1560 ret = AVERROR(ENOMEM);
1563 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1564 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1565 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1566 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1567 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1568 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1569 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1570 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1571 end_ebml_master(pb, ebml_header);
1573 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1574 mkv->segment_offset = avio_tell(pb);
1576 // we write 2 seek heads - one at the end of the file to point to each
1577 // cluster, and one at the beginning to point to all other level one
1578 // elements (including the seek head at the end of the file), which
1579 // isn't more than 10 elements if we only write one of each other
1580 // currently defined level 1 element
1581 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1582 if (!mkv->main_seekhead) {
1583 ret = AVERROR(ENOMEM);
1587 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1588 if (ret < 0) goto fail;
1590 segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
1591 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1592 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1593 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1594 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1595 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1596 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1597 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1599 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1601 if (mkv->mode != MODE_WEBM) {
1602 uint32_t segment_uid[4];
1605 av_lfg_init(&lfg, av_get_random_seed());
1607 for (i = 0; i < 4; i++)
1608 segment_uid[i] = av_lfg_get(&lfg);
1610 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1613 const char *ident = "Lavf";
1614 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1615 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1618 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1619 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1620 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1621 uint8_t date_utc_buf[8];
1622 AV_WB64(date_utc_buf, date_utc);
1623 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1626 // reserve space for the duration
1628 mkv->duration_offset = avio_tell(pb);
1629 if (!mkv->is_live) {
1630 int64_t metadata_duration = get_metadata_duration(s);
1632 if (s->duration > 0) {
1633 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1634 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1635 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1636 } else if (metadata_duration > 0) {
1637 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1638 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1639 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1641 put_ebml_void(pb, 11); // assumes double-precision float to be written
1644 end_ebml_master(pb, segment_info);
1646 // initialize stream_duration fields
1647 mkv->stream_durations = av_mallocz(s->nb_streams * sizeof(int64_t));
1648 mkv->stream_duration_offsets = av_mallocz(s->nb_streams * sizeof(int64_t));
1650 ret = mkv_write_tracks(s);
1654 for (i = 0; i < s->nb_chapters; i++)
1655 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1657 if (mkv->mode != MODE_WEBM) {
1658 ret = mkv_write_chapters(s);
1662 ret = mkv_write_tags(s);
1666 ret = mkv_write_attachments(s);
1671 if (!s->pb->seekable && !mkv->is_live)
1672 mkv_write_seekhead(pb, mkv);
1674 mkv->cues = mkv_start_cues(mkv->segment_offset);
1676 ret = AVERROR(ENOMEM);
1679 if (pb->seekable && mkv->reserve_cues_space) {
1680 mkv->cues_pos = avio_tell(pb);
1681 put_ebml_void(pb, mkv->reserve_cues_space);
1684 av_init_packet(&mkv->cur_audio_pkt);
1685 mkv->cur_audio_pkt.size = 0;
1686 mkv->cluster_pos = -1;
1690 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1691 // after 4k and on a keyframe
1693 if (mkv->cluster_time_limit < 0)
1694 mkv->cluster_time_limit = 5000;
1695 if (mkv->cluster_size_limit < 0)
1696 mkv->cluster_size_limit = 5 * 1024 * 1024;
1698 if (mkv->cluster_time_limit < 0)
1699 mkv->cluster_time_limit = 1000;
1700 if (mkv->cluster_size_limit < 0)
1701 mkv->cluster_size_limit = 32 * 1024;
1710 static int mkv_blockgroup_size(int pkt_size)
1712 int size = pkt_size + 4;
1713 size += ebml_num_size(size);
1714 size += 2; // EBML ID for block and block duration
1715 size += 8; // max size of block duration
1716 size += ebml_num_size(size);
1717 size += 1; // blockgroup EBML ID
1721 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1728 dst = av_malloc(srclen);
1730 return AVERROR(ENOMEM);
1732 while (srclen >= WV_HEADER_SIZE) {
1735 ret = ff_wv_parse_header(&header, src);
1738 src += WV_HEADER_SIZE;
1739 srclen -= WV_HEADER_SIZE;
1741 if (srclen < header.blocksize) {
1742 ret = AVERROR_INVALIDDATA;
1746 if (header.initial) {
1747 AV_WL32(dst + offset, header.samples);
1750 AV_WL32(dst + offset, header.flags);
1751 AV_WL32(dst + offset + 4, header.crc);
1754 if (!(header.initial && header.final)) {
1755 AV_WL32(dst + offset, header.blocksize);
1759 memcpy(dst + offset, src, header.blocksize);
1760 src += header.blocksize;
1761 srclen -= header.blocksize;
1762 offset += header.blocksize;
1774 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1775 unsigned int blockid, AVPacket *pkt, int keyframe)
1777 MatroskaMuxContext *mkv = s->priv_data;
1778 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1779 uint8_t *data = NULL, *side_data = NULL;
1780 int offset = 0, size = pkt->size, side_data_size = 0;
1781 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1782 uint64_t additional_id = 0;
1783 int64_t discard_padding = 0;
1784 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
1785 ebml_master block_group, block_additions, block_more;
1787 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1788 "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", keyframe %d\n",
1789 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration,
1791 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
1792 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
1793 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1794 else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
1795 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
1796 /* extradata is Annex B, assume the bitstream is too and convert it */
1797 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1798 else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
1799 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
1801 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
1807 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
1808 /* Matroska specification requires to remove the first QuickTime atom
1814 side_data = av_packet_get_side_data(pkt,
1815 AV_PKT_DATA_SKIP_SAMPLES,
1818 if (side_data && side_data_size >= 10) {
1819 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
1820 (AVRational){1, par->sample_rate},
1821 (AVRational){1, 1000000000});
1824 side_data = av_packet_get_side_data(pkt,
1825 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
1828 additional_id = AV_RB64(side_data);
1830 side_data_size -= 8;
1833 if ((side_data_size && additional_id == 1) || discard_padding) {
1834 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
1835 blockid = MATROSKA_ID_BLOCK;
1838 put_ebml_id(pb, blockid);
1839 put_ebml_num(pb, size + 4, 0);
1840 // this assumes stream_index is less than 126
1841 avio_w8(pb, 0x80 | track_number);
1842 avio_wb16(pb, ts - mkv->cluster_pts);
1843 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
1844 avio_write(pb, data + offset, size);
1845 if (data != pkt->data)
1848 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
1849 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE,
1850 mkv->last_track_timestamp[track_number - 1]);
1852 mkv->last_track_timestamp[track_number - 1] = ts - mkv->cluster_pts;
1854 if (discard_padding) {
1855 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
1858 if (side_data_size && additional_id == 1) {
1859 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
1860 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
1861 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
1862 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
1863 put_ebml_num(pb, side_data_size, 0);
1864 avio_write(pb, side_data, side_data_size);
1865 end_ebml_master(pb, block_more);
1866 end_ebml_master(pb, block_additions);
1868 if ((side_data_size && additional_id == 1) || discard_padding) {
1869 end_ebml_master(pb, block_group);
1873 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1875 MatroskaMuxContext *mkv = s->priv_data;
1876 ebml_master blockgroup;
1877 int id_size, settings_size, size;
1878 uint8_t *id, *settings;
1879 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1880 const int flags = 0;
1883 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
1887 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
1890 size = id_size + 1 + settings_size + 1 + pkt->size;
1892 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1893 "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", flags %d\n",
1894 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
1896 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1898 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1899 put_ebml_num(pb, size + 4, 0);
1900 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1901 avio_wb16(pb, ts - mkv->cluster_pts);
1903 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
1905 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
1906 end_ebml_master(pb, blockgroup);
1908 return pkt->duration;
1911 static void mkv_flush_dynbuf(AVFormatContext *s)
1913 MatroskaMuxContext *mkv = s->priv_data;
1920 bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
1921 avio_write(s->pb, dyn_buf, bufsize);
1926 static void mkv_start_new_cluster(AVFormatContext *s, AVPacket *pkt)
1928 MatroskaMuxContext *mkv = s->priv_data;
1931 if (s->pb->seekable) {
1937 av_log(s, AV_LOG_DEBUG,
1938 "Starting new cluster at offset %" PRIu64 " bytes, "
1939 "pts %" PRIu64 "dts %" PRIu64 "\n",
1940 avio_tell(pb), pkt->pts, pkt->dts);
1941 end_ebml_master(pb, mkv->cluster);
1942 mkv->cluster_pos = -1;
1944 mkv_flush_dynbuf(s);
1948 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
1950 MatroskaMuxContext *mkv = s->priv_data;
1951 AVIOContext *pb = s->pb;
1952 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1953 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1954 int duration = pkt->duration;
1956 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1957 int64_t relative_packet_pos;
1958 int dash_tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
1960 if (ts == AV_NOPTS_VALUE) {
1961 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
1962 return AVERROR(EINVAL);
1964 ts += mkv->tracks[pkt->stream_index].ts_offset;
1966 if (mkv->cluster_pos != -1) {
1967 int64_t cluster_time = ts - mkv->cluster_pts + mkv->tracks[pkt->stream_index].ts_offset;
1968 if ((int16_t)cluster_time != cluster_time) {
1969 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
1970 mkv_start_new_cluster(s, pkt);
1974 if (!s->pb->seekable) {
1976 ret = avio_open_dyn_buf(&mkv->dyn_bc);
1978 av_log(s, AV_LOG_ERROR, "Failed to open dynamic buffer\n");
1985 if (mkv->cluster_pos == -1) {
1986 mkv->cluster_pos = avio_tell(s->pb);
1987 mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
1988 put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
1989 mkv->cluster_pts = FFMAX(0, ts);
1992 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1994 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1995 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
1996 if (s->pb->seekable && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
1997 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
1998 if (ret < 0) return ret;
2001 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2002 duration = mkv_write_vtt_blocks(s, pb, pkt);
2004 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2005 mkv_blockgroup_size(pkt->size));
2007 #if FF_API_CONVERGENCE_DURATION
2008 FF_DISABLE_DEPRECATION_WARNINGS
2009 /* For backward compatibility, prefer convergence_duration. */
2010 if (pkt->convergence_duration > 0) {
2011 duration = pkt->convergence_duration;
2013 FF_ENABLE_DEPRECATION_WARNINGS
2015 /* All subtitle blocks are considered to be keyframes. */
2016 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2017 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2018 end_ebml_master(pb, blockgroup);
2021 if (s->pb->seekable) {
2022 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts,
2023 mkv->cluster_pos, relative_packet_pos, duration);
2029 mkv->duration = FFMAX(mkv->duration, ts + duration);
2031 if (mkv->stream_durations)
2032 mkv->stream_durations[pkt->stream_index] =
2033 FFMAX(mkv->stream_durations[pkt->stream_index], ts + duration);
2038 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2040 MatroskaMuxContext *mkv = s->priv_data;
2041 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2042 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2044 int64_t cluster_time;
2046 int start_new_cluster;
2048 if (mkv->tracks[pkt->stream_index].write_dts)
2049 cluster_time = pkt->dts - mkv->cluster_pts;
2051 cluster_time = pkt->pts - mkv->cluster_pts;
2052 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2054 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
2055 // after 4k and on a keyframe
2056 if (s->pb->seekable) {
2057 cluster_size = avio_tell(s->pb) - mkv->cluster_pos;
2059 cluster_size = avio_tell(mkv->dyn_bc);
2062 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2063 // WebM DASH specification states that the first block of every cluster
2064 // has to be a key frame. So for DASH video, we only create a cluster
2065 // on seeing key frames.
2066 start_new_cluster = keyframe;
2067 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2068 (mkv->cluster_pos == -1 ||
2069 cluster_time > mkv->cluster_time_limit)) {
2070 // For DASH audio, we create a Cluster based on cluster_time_limit
2071 start_new_cluster = 1;
2072 } else if (!mkv->is_dash &&
2073 (cluster_size > mkv->cluster_size_limit ||
2074 cluster_time > mkv->cluster_time_limit ||
2075 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2076 cluster_size > 4 * 1024))) {
2077 start_new_cluster = 1;
2079 start_new_cluster = 0;
2082 if (mkv->cluster_pos != -1 && start_new_cluster) {
2083 mkv_start_new_cluster(s, pkt);
2086 if (!mkv->cluster_pos)
2087 avio_write_marker(s->pb,
2088 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2089 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2091 // check if we have an audio packet cached
2092 if (mkv->cur_audio_pkt.size > 0) {
2093 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2094 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2095 mkv->is_dash ? start_new_cluster : 0);
2096 av_packet_unref(&mkv->cur_audio_pkt);
2098 av_log(s, AV_LOG_ERROR,
2099 "Could not write cached audio packet ret:%d\n", ret);
2104 // buffer an audio packet to ensure the packet containing the video
2105 // keyframe's timecode is contained in the same cluster for WebM
2106 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2107 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2109 ret = mkv_write_packet_internal(s, pkt, 0);
2113 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2115 MatroskaMuxContext *mkv = s->priv_data;
2117 if (s->pb->seekable)
2122 if (mkv->cluster_pos != -1) {
2123 av_log(s, AV_LOG_DEBUG,
2124 "Flushing cluster at offset %" PRIu64 " bytes\n",
2126 end_ebml_master(pb, mkv->cluster);
2127 mkv->cluster_pos = -1;
2129 mkv_flush_dynbuf(s);
2134 return mkv_write_packet(s, pkt);
2137 static int mkv_write_trailer(AVFormatContext *s)
2139 MatroskaMuxContext *mkv = s->priv_data;
2140 AVIOContext *pb = s->pb;
2141 int64_t currentpos, cuespos;
2144 // check if we have an audio packet cached
2145 if (mkv->cur_audio_pkt.size > 0) {
2146 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2147 av_packet_unref(&mkv->cur_audio_pkt);
2149 av_log(s, AV_LOG_ERROR,
2150 "Could not write cached audio packet ret:%d\n", ret);
2156 end_ebml_master(mkv->dyn_bc, mkv->cluster);
2157 mkv_flush_dynbuf(s);
2158 } else if (mkv->cluster_pos != -1) {
2159 end_ebml_master(pb, mkv->cluster);
2162 if (mkv->mode != MODE_WEBM) {
2163 ret = mkv_write_chapters(s);
2169 if (mkv->cues->num_entries) {
2170 if (mkv->reserve_cues_space) {
2173 currentpos = avio_tell(pb);
2174 avio_seek(pb, mkv->cues_pos, SEEK_SET);
2176 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2177 cues_end = avio_tell(pb);
2178 if (cues_end > cuespos + mkv->reserve_cues_space) {
2179 av_log(s, AV_LOG_ERROR,
2180 "Insufficient space reserved for cues: %d "
2181 "(needed: %" PRId64 ").\n",
2182 mkv->reserve_cues_space, cues_end - cuespos);
2183 return AVERROR(EINVAL);
2186 if (cues_end < cuespos + mkv->reserve_cues_space)
2187 put_ebml_void(pb, mkv->reserve_cues_space -
2188 (cues_end - cuespos));
2190 avio_seek(pb, currentpos, SEEK_SET);
2192 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2195 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES,
2201 mkv_write_seekhead(pb, mkv);
2203 // update the duration
2204 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2205 currentpos = avio_tell(pb);
2206 avio_seek(pb, mkv->duration_offset, SEEK_SET);
2207 put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
2209 // update stream durations
2210 if (mkv->stream_durations) {
2212 for (i = 0; i < s->nb_streams; ++i) {
2213 AVStream *st = s->streams[i];
2214 double duration_sec = mkv->stream_durations[i] * av_q2d(st->time_base);
2215 char duration_string[20] = "";
2217 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2218 mkv->stream_durations[i]);
2220 if (!mkv->is_live && mkv->stream_duration_offsets[i] > 0) {
2221 avio_seek(pb, mkv->stream_duration_offsets[i], SEEK_SET);
2223 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2224 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2225 fmod(duration_sec, 60));
2227 put_ebml_binary(pb, MATROSKA_ID_TAGSTRING, duration_string, 20);
2232 avio_seek(pb, currentpos, SEEK_SET);
2235 if (!mkv->is_live) {
2236 end_ebml_master(pb, mkv->segment);
2243 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2246 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2247 if (ff_mkv_codec_tags[i].id == codec_id)
2250 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2251 enum AVMediaType type = avcodec_get_type(codec_id);
2252 // mkv theoretically supports any video/audio through VFW/ACM
2253 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2260 static int mkv_init(struct AVFormatContext *s)
2264 if (s->avoid_negative_ts < 0) {
2265 s->avoid_negative_ts = 1;
2266 s->internal->avoid_negative_ts_use_pts = 1;
2269 for (i = 0; i < s->nb_streams; i++) {
2270 // ms precision is the de-facto standard timescale for mkv files
2271 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2277 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2280 AVStream *st = s->streams[pkt->stream_index];
2282 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2283 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2284 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2285 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2286 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2292 static const AVCodecTag additional_audio_tags[] = {
2293 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2294 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
2295 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2296 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2297 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2298 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2299 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2300 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2301 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2302 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2303 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2304 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2305 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2308 static const AVCodecTag additional_video_tags[] = {
2309 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2310 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2311 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2312 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
2313 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
2314 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2317 static const AVCodecTag additional_subtitle_tags[] = {
2318 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2319 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2320 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2323 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2324 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2325 static const AVOption options[] = {
2326 { "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 },
2327 { "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 },
2328 { "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 },
2329 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2330 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2331 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2332 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2336 #if CONFIG_MATROSKA_MUXER
2337 static const AVClass matroska_class = {
2338 .class_name = "matroska muxer",
2339 .item_name = av_default_item_name,
2341 .version = LIBAVUTIL_VERSION_INT,
2344 AVOutputFormat ff_matroska_muxer = {
2346 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2347 .mime_type = "video/x-matroska",
2348 .extensions = "mkv",
2349 .priv_data_size = sizeof(MatroskaMuxContext),
2350 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2351 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2352 .video_codec = CONFIG_LIBX264_ENCODER ?
2353 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2355 .write_header = mkv_write_header,
2356 .write_packet = mkv_write_flush_packet,
2357 .write_trailer = mkv_write_trailer,
2358 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2359 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2360 .codec_tag = (const AVCodecTag* const []){
2361 ff_codec_bmp_tags, ff_codec_wav_tags,
2362 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2364 .subtitle_codec = AV_CODEC_ID_ASS,
2365 .query_codec = mkv_query_codec,
2366 .check_bitstream = mkv_check_bitstream,
2367 .priv_class = &matroska_class,
2371 #if CONFIG_WEBM_MUXER
2372 static const AVClass webm_class = {
2373 .class_name = "webm muxer",
2374 .item_name = av_default_item_name,
2376 .version = LIBAVUTIL_VERSION_INT,
2379 AVOutputFormat ff_webm_muxer = {
2381 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2382 .mime_type = "video/webm",
2383 .extensions = "webm",
2384 .priv_data_size = sizeof(MatroskaMuxContext),
2385 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2386 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2387 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2389 .write_header = mkv_write_header,
2390 .write_packet = mkv_write_flush_packet,
2391 .write_trailer = mkv_write_trailer,
2392 .check_bitstream = mkv_check_bitstream,
2393 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2394 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2395 .priv_class = &webm_class,
2399 #if CONFIG_MATROSKA_AUDIO_MUXER
2400 static const AVClass mka_class = {
2401 .class_name = "matroska audio muxer",
2402 .item_name = av_default_item_name,
2404 .version = LIBAVUTIL_VERSION_INT,
2406 AVOutputFormat ff_matroska_audio_muxer = {
2408 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2409 .mime_type = "audio/x-matroska",
2410 .extensions = "mka",
2411 .priv_data_size = sizeof(MatroskaMuxContext),
2412 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2413 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2414 .video_codec = AV_CODEC_ID_NONE,
2416 .write_header = mkv_write_header,
2417 .write_packet = mkv_write_flush_packet,
2418 .write_trailer = mkv_write_trailer,
2419 .check_bitstream = mkv_check_bitstream,
2420 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2422 .codec_tag = (const AVCodecTag* const []){
2423 ff_codec_wav_tags, additional_audio_tags, 0
2425 .priv_class = &mka_class,