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/random_seed.h"
48 #include "libavutil/rational.h"
49 #include "libavutil/samplefmt.h"
50 #include "libavutil/sha.h"
51 #include "libavutil/stereo3d.h"
53 #include "libavcodec/xiph.h"
54 #include "libavcodec/mpeg4audio.h"
55 #include "libavcodec/internal.h"
57 typedef struct ebml_master {
58 int64_t pos; ///< absolute offset in the file where the master's elements start
59 int sizebytes; ///< how many bytes were reserved for the size
62 typedef struct mkv_seekhead_entry {
63 unsigned int elementid;
67 typedef struct mkv_seekhead {
69 int64_t segment_offset; ///< the file offset to the beginning of the segment
70 int reserved_size; ///< -1 if appending to file
72 mkv_seekhead_entry *entries;
76 typedef struct mkv_cuepoint {
80 int64_t cluster_pos; ///< file offset of the cluster containing the block
81 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
82 int64_t duration; ///< duration of the block according to time base
85 typedef struct mkv_cues {
86 int64_t segment_offset;
87 mkv_cuepoint *entries;
91 typedef struct mkv_track {
97 #define MODE_MATROSKAv2 0x01
98 #define MODE_WEBM 0x02
100 /** Maximum number of tracks allowed in a Matroska file (with track numbers in
101 * range 1 to 126 (inclusive) */
102 #define MAX_TRACKS 126
104 typedef struct MatroskaMuxContext {
105 const AVClass *class;
109 int64_t segment_offset;
111 int64_t cluster_pos; ///< file offset of the current cluster
113 int64_t duration_offset;
115 mkv_seekhead *main_seekhead;
119 AVPacket cur_audio_pkt;
121 int have_attachments;
124 int reserve_cues_space;
125 int cluster_size_limit;
127 int64_t cluster_time_limit;
129 int dash_track_number;
132 uint32_t chapter_id_offset;
135 int64_t last_track_timestamp[MAX_TRACKS];
137 int64_t* stream_durations;
138 int64_t* stream_duration_offsets;
141 } MatroskaMuxContext;
144 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
145 * offset, 4 bytes for target EBML ID */
146 #define MAX_SEEKENTRY_SIZE 21
148 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 4
150 #define MAX_CUETRACKPOS_SIZE 42
152 /** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */
153 #define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE * num_tracks
155 /** Seek preroll value for opus */
156 #define OPUS_SEEK_PREROLL 80000000
158 static int ebml_id_size(unsigned int id)
160 return (av_log2(id + 1) - 1) / 7 + 1;
163 static void put_ebml_id(AVIOContext *pb, unsigned int id)
165 int i = ebml_id_size(id);
167 avio_w8(pb, (uint8_t)(id >> (i * 8)));
171 * Write an EBML size meaning "unknown size".
173 * @param bytes The number of bytes the size should occupy (maximum: 8).
175 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
177 av_assert0(bytes <= 8);
178 avio_w8(pb, 0x1ff >> bytes);
179 ffio_fill(pb, 0xff, bytes - 1);
183 * Calculate how many bytes are needed to represent a given number in EBML.
185 static int ebml_num_size(uint64_t num)
188 while ((num + 1) >> bytes * 7)
194 * Write a number in EBML variable length format.
196 * @param bytes The number of bytes that need to be used to write the number.
197 * If zero, any number of bytes can be used.
199 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
201 int i, needed_bytes = ebml_num_size(num);
203 // sizes larger than this are currently undefined in EBML
204 av_assert0(num < (1ULL << 56) - 1);
207 // don't care how many bytes are used, so use the min
208 bytes = needed_bytes;
209 // the bytes needed to write the given size would exceed the bytes
210 // that we need to use, so write unknown size. This shouldn't happen.
211 av_assert0(bytes >= needed_bytes);
213 num |= 1ULL << bytes * 7;
214 for (i = bytes - 1; i >= 0; i--)
215 avio_w8(pb, (uint8_t)(num >> i * 8));
218 static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val)
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_sint(AVIOContext *pb, unsigned int elementid, int64_t val)
234 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
236 while (tmp>>=8) bytes++;
238 put_ebml_id(pb, elementid);
239 put_ebml_num(pb, bytes, 0);
240 for (i = bytes - 1; i >= 0; i--)
241 avio_w8(pb, (uint8_t)(val >> i * 8));
244 static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val)
246 put_ebml_id(pb, elementid);
247 put_ebml_num(pb, 8, 0);
248 avio_wb64(pb, av_double2int(val));
251 static void put_ebml_binary(AVIOContext *pb, unsigned int elementid,
252 const void *buf, int size)
254 put_ebml_id(pb, elementid);
255 put_ebml_num(pb, size, 0);
256 avio_write(pb, buf, size);
259 static void put_ebml_string(AVIOContext *pb, unsigned int elementid,
262 put_ebml_binary(pb, elementid, str, strlen(str));
266 * Write a void element of a given size. Useful for reserving space in
267 * the file to be written to later.
269 * @param size The number of bytes to reserve, which must be at least 2.
271 static void put_ebml_void(AVIOContext *pb, uint64_t size)
273 int64_t currentpos = avio_tell(pb);
275 av_assert0(size >= 2);
277 put_ebml_id(pb, EBML_ID_VOID);
278 // we need to subtract the length needed to store the size from the
279 // size we need to reserve so 2 cases, we use 8 bytes to store the
280 // size if possible, 1 byte otherwise
282 put_ebml_num(pb, size - 1, 0);
284 put_ebml_num(pb, size - 9, 8);
285 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
288 static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid,
289 uint64_t expectedsize)
291 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
292 put_ebml_id(pb, elementid);
293 put_ebml_size_unknown(pb, bytes);
294 return (ebml_master) {avio_tell(pb), bytes };
297 static void end_ebml_master(AVIOContext *pb, ebml_master master)
299 int64_t pos = avio_tell(pb);
301 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
303 put_ebml_num(pb, pos - master.pos, master.sizebytes);
304 avio_seek(pb, pos, SEEK_SET);
307 static void put_xiph_size(AVIOContext *pb, int size)
309 ffio_fill(pb, 255, size / 255);
310 avio_w8(pb, size % 255);
314 * Free the members allocated in the mux context.
316 static void mkv_free(MatroskaMuxContext *mkv) {
317 if (mkv->main_seekhead) {
318 av_freep(&mkv->main_seekhead->entries);
319 av_freep(&mkv->main_seekhead);
322 av_freep(&mkv->cues->entries);
323 av_freep(&mkv->cues);
325 av_freep(&mkv->tracks);
326 av_freep(&mkv->stream_durations);
327 av_freep(&mkv->stream_duration_offsets);
331 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
332 * elements. If a maximum number of elements is specified, enough space
333 * will be reserved at the current file location to write a seek head of
336 * @param segment_offset The absolute offset to the position in the file
337 * where the segment begins.
338 * @param numelements The maximum number of elements that will be indexed
339 * by this seek head, 0 if unlimited.
341 static mkv_seekhead *mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset,
344 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
348 new_seekhead->segment_offset = segment_offset;
350 if (numelements > 0) {
351 new_seekhead->filepos = avio_tell(pb);
352 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
353 // and size, and 3 bytes to guarantee that an EBML void element
354 // will fit afterwards
355 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 13;
356 new_seekhead->max_entries = numelements;
357 put_ebml_void(pb, new_seekhead->reserved_size);
362 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
364 mkv_seekhead_entry *entries = seekhead->entries;
366 // don't store more elements than we reserved space for
367 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
370 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
372 return AVERROR(ENOMEM);
373 seekhead->entries = entries;
375 seekhead->entries[seekhead->num_entries].elementid = elementid;
376 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
382 * Write the seek head to the file and free it. If a maximum number of
383 * elements was specified to mkv_start_seekhead(), the seek head will
384 * be written at the location reserved for it. Otherwise, it is written
385 * at the current location in the file.
387 * @return The file offset where the seekhead was written,
388 * -1 if an error occurred.
390 static int64_t mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv)
392 mkv_seekhead *seekhead = mkv->main_seekhead;
393 ebml_master metaseek, seekentry;
397 currentpos = avio_tell(pb);
399 if (seekhead->reserved_size > 0) {
400 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
406 metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size);
407 for (i = 0; i < seekhead->num_entries; i++) {
408 mkv_seekhead_entry *entry = &seekhead->entries[i];
410 seekentry = start_ebml_master(pb, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
412 put_ebml_id(pb, MATROSKA_ID_SEEKID);
413 put_ebml_num(pb, ebml_id_size(entry->elementid), 0);
414 put_ebml_id(pb, entry->elementid);
416 put_ebml_uint(pb, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
417 end_ebml_master(pb, seekentry);
419 end_ebml_master(pb, metaseek);
421 if (seekhead->reserved_size > 0) {
422 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
423 put_ebml_void(pb, remaining);
424 avio_seek(pb, currentpos, SEEK_SET);
426 currentpos = seekhead->filepos;
429 av_freep(&mkv->main_seekhead->entries);
430 av_freep(&mkv->main_seekhead);
435 static mkv_cues *mkv_start_cues(int64_t segment_offset)
437 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
441 cues->segment_offset = segment_offset;
445 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
446 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
448 mkv_cuepoint *entries = cues->entries;
453 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
455 return AVERROR(ENOMEM);
456 cues->entries = entries;
458 cues->entries[cues->num_entries].pts = ts;
459 cues->entries[cues->num_entries].stream_idx = stream;
460 cues->entries[cues->num_entries].tracknum = tracknum;
461 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
462 cues->entries[cues->num_entries].relative_pos = relative_pos;
463 cues->entries[cues->num_entries++].duration = duration;
468 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
470 AVIOContext *pb = s->pb;
471 ebml_master cues_element;
475 currentpos = avio_tell(pb);
476 cues_element = start_ebml_master(pb, MATROSKA_ID_CUES, 0);
478 for (i = 0; i < cues->num_entries; i++) {
479 ebml_master cuepoint, track_positions;
480 mkv_cuepoint *entry = &cues->entries[i];
481 uint64_t pts = entry->pts;
484 // Calculate the number of entries, so we know the element size
485 for (j = 0; j < num_tracks; j++)
486 tracks[j].has_cue = 0;
487 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
488 int tracknum = entry[j].stream_idx;
489 av_assert0(tracknum>=0 && tracknum<num_tracks);
490 if (tracks[tracknum].has_cue && s->streams[tracknum]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
492 tracks[tracknum].has_cue = 1;
496 cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(ctp_nb));
497 put_ebml_uint(pb, MATROSKA_ID_CUETIME, pts);
499 // put all the entries from different tracks that have the exact same
500 // timestamp into the same CuePoint
501 for (j = 0; j < num_tracks; j++)
502 tracks[j].has_cue = 0;
503 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
504 int tracknum = entry[j].stream_idx;
505 av_assert0(tracknum>=0 && tracknum<num_tracks);
506 if (tracks[tracknum].has_cue && s->streams[tracknum]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
508 tracks[tracknum].has_cue = 1;
509 track_positions = start_ebml_master(pb, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
510 put_ebml_uint(pb, MATROSKA_ID_CUETRACK , entry[j].tracknum );
511 put_ebml_uint(pb, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
512 put_ebml_uint(pb, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
513 if (entry[j].duration != -1)
514 put_ebml_uint(pb, MATROSKA_ID_CUEDURATION , entry[j].duration);
515 end_ebml_master(pb, track_positions);
518 end_ebml_master(pb, cuepoint);
520 end_ebml_master(pb, cues_element);
525 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
527 const uint8_t *header_start[3];
529 int first_header_size;
532 if (par->codec_id == AV_CODEC_ID_VORBIS)
533 first_header_size = 30;
535 first_header_size = 42;
537 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
538 first_header_size, header_start, header_len) < 0) {
539 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
543 avio_w8(pb, 2); // number packets - 1
544 for (j = 0; j < 2; j++) {
545 put_xiph_size(pb, header_len[j]);
547 for (j = 0; j < 3; j++)
548 avio_write(pb, header_start[j], header_len[j]);
553 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
555 if (par->extradata && par->extradata_size == 2)
556 avio_write(pb, par->extradata, 2);
558 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
562 static int put_flac_codecpriv(AVFormatContext *s,
563 AVIOContext *pb, AVCodecParameters *par)
565 int write_comment = (par->channel_layout &&
566 !(par->channel_layout & ~0x3ffffULL) &&
567 !ff_flac_is_native_layout(par->channel_layout));
568 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
575 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
576 "Lavf" : LIBAVFORMAT_IDENT;
577 AVDictionary *dict = NULL;
578 uint8_t buf[32], *data, *p;
581 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
582 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
584 len = ff_vorbiscomment_length(dict, vendor);
585 if (len >= ((1<<24) - 4))
586 return AVERROR(EINVAL);
588 data = av_malloc(len + 4);
591 return AVERROR(ENOMEM);
595 AV_WB24(data + 1, len);
598 ff_vorbiscomment_write(&p, &dict, vendor);
600 avio_write(pb, data, len + 4);
609 static int get_aac_sample_rates(AVFormatContext *s, AVCodecParameters *par,
610 int *sample_rate, int *output_sample_rate)
612 MPEG4AudioConfig mp4ac;
614 if (avpriv_mpeg4audio_get_config(&mp4ac, par->extradata,
615 par->extradata_size * 8, 1) < 0) {
616 av_log(s, AV_LOG_ERROR,
617 "Error parsing AAC extradata, unable to determine samplerate.\n");
618 return AVERROR(EINVAL);
621 *sample_rate = mp4ac.sample_rate;
622 *output_sample_rate = mp4ac.ext_sample_rate;
626 static int mkv_write_native_codecprivate(AVFormatContext *s,
627 AVCodecParameters *par,
630 switch (par->codec_id) {
631 case AV_CODEC_ID_VORBIS:
632 case AV_CODEC_ID_THEORA:
633 return put_xiph_codecpriv(s, dyn_cp, par);
634 case AV_CODEC_ID_FLAC:
635 return put_flac_codecpriv(s, dyn_cp, par);
636 case AV_CODEC_ID_WAVPACK:
637 return put_wv_codecpriv(dyn_cp, par);
638 case AV_CODEC_ID_H264:
639 return ff_isom_write_avcc(dyn_cp, par->extradata,
640 par->extradata_size);
641 case AV_CODEC_ID_HEVC:
642 ff_isom_write_hvcc(dyn_cp, par->extradata,
643 par->extradata_size, 0);
645 case AV_CODEC_ID_ALAC:
646 if (par->extradata_size < 36) {
647 av_log(s, AV_LOG_ERROR,
648 "Invalid extradata found, ALAC expects a 36-byte "
650 return AVERROR_INVALIDDATA;
652 avio_write(dyn_cp, par->extradata + 12,
653 par->extradata_size - 12);
656 if (par->codec_id == AV_CODEC_ID_PRORES &&
657 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
658 avio_wl32(dyn_cp, par->codec_tag);
659 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
660 avio_write(dyn_cp, par->extradata, par->extradata_size);
666 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
667 AVCodecParameters *par,
668 int native_id, int qt_id)
672 int ret, codecpriv_size;
674 ret = avio_open_dyn_buf(&dyn_cp);
679 ret = mkv_write_native_codecprivate(s, par, dyn_cp);
680 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
683 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
685 if (par->extradata_size) {
686 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
687 && ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id
690 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
691 avio_wl32(dyn_cp, par->codec_tag);
692 for(i = 0; i < 0x5a - 8; i++)
695 avio_write(dyn_cp, par->extradata, par->extradata_size);
698 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
699 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
700 avcodec_get_name(par->codec_id));
703 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
705 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
706 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
707 avcodec_get_name(par->codec_id));
708 ret = AVERROR(EINVAL);
711 ff_put_bmp_header(dyn_cp, par, ff_codec_bmp_tags, 0, 0);
713 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
715 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
717 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
718 avcodec_get_name(par->codec_id));
719 ret = AVERROR(EINVAL);
722 par->codec_tag = tag;
724 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
727 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
729 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
735 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
736 int side_data_size = 0;
737 const uint8_t *side_data = av_stream_get_side_data(
738 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA, &side_data_size);
739 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, 0);
741 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
742 par->color_trc < AVCOL_TRC_NB) {
743 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
746 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
747 par->color_space < AVCOL_SPC_NB) {
748 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
750 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
751 par->color_primaries < AVCOL_PRI_NB) {
752 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
754 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
755 par->color_range < AVCOL_RANGE_NB) {
756 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
758 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
759 ebml_master meta_element = start_ebml_master(
760 pb, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
761 const AVMasteringDisplayMetadata *metadata =
762 (const AVMasteringDisplayMetadata*)side_data;
763 if (metadata->has_primaries) {
764 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_RX,
765 av_q2d(metadata->display_primaries[0][0]));
766 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_RY,
767 av_q2d(metadata->display_primaries[0][1]));
768 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_GX,
769 av_q2d(metadata->display_primaries[1][0]));
770 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_GY,
771 av_q2d(metadata->display_primaries[1][1]));
772 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_BX,
773 av_q2d(metadata->display_primaries[2][0]));
774 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_BY,
775 av_q2d(metadata->display_primaries[2][1]));
776 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_WHITEX,
777 av_q2d(metadata->white_point[0]));
778 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_WHITEY,
779 av_q2d(metadata->white_point[1]));
781 if (metadata->has_luminance) {
782 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
783 av_q2d(metadata->max_luminance));
784 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
785 av_q2d(metadata->min_luminance));
787 end_ebml_master(pb, meta_element);
789 end_ebml_master(pb, colorinfo);
793 static void mkv_write_field_order(AVIOContext *pb,
794 enum AVFieldOrder field_order)
796 switch (field_order) {
797 case AV_FIELD_UNKNOWN:
798 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
799 MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED);
801 case AV_FIELD_PROGRESSIVE:
802 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
803 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
809 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
810 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
811 switch (field_order) {
813 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
814 MATROSKA_VIDEO_FIELDORDER_TT);
817 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
818 MATROSKA_VIDEO_FIELDORDER_BB);
821 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
822 MATROSKA_VIDEO_FIELDORDER_TB);
825 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
826 MATROSKA_VIDEO_FIELDORDER_BT);
832 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
833 AVStream *st, int mode, int *h_width, int *h_height)
837 AVDictionaryEntry *tag;
838 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
842 // convert metadata into proper side data and add it to the stream
843 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
844 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
845 int stereo_mode = atoi(tag->value);
847 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
848 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
853 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
854 stereo_mode != 10 && stereo_mode != 12) {
855 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
861 // iterate to find the stereo3d side data
862 for (i = 0; i < st->nb_side_data; i++) {
863 AVPacketSideData sd = st->side_data[i];
864 if (sd.type == AV_PKT_DATA_STEREO3D) {
865 AVStereo3D *stereo = (AVStereo3D *)sd.data;
867 switch (stereo->type) {
869 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
871 case AV_STEREO3D_SIDEBYSIDE:
872 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
873 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
874 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
877 case AV_STEREO3D_TOPBOTTOM:
878 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
879 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
883 case AV_STEREO3D_CHECKERBOARD:
884 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
885 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
888 case AV_STEREO3D_LINES:
889 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
890 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
894 case AV_STEREO3D_COLUMNS:
895 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
896 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
900 case AV_STEREO3D_FRAMESEQUENCE:
901 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
902 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
910 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
913 // if webm, do not write unsupported modes
914 if ((mode == MODE_WEBM &&
915 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
916 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
917 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
918 av_log(s, AV_LOG_ERROR,
919 "The specified stereo mode is not valid.\n");
920 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
921 return AVERROR(EINVAL);
924 // write StereoMode if format is valid
925 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
930 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
931 int i, AVIOContext *pb, int default_stream_exists)
933 AVStream *st = s->streams[i];
934 AVCodecParameters *par = st->codecpar;
935 ebml_master subinfo, track;
938 int bit_depth = av_get_bits_per_sample(par->codec_id);
939 int sample_rate = par->sample_rate;
940 int output_sample_rate = 0;
941 int display_width_div = 1;
942 int display_height_div = 1;
944 AVDictionaryEntry *tag;
946 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
947 mkv->have_attachments = 1;
951 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
952 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
953 if (par->bits_per_raw_sample)
954 bit_depth = par->bits_per_raw_sample;
956 bit_depth = av_get_bytes_per_sample(par->format) << 3;
959 bit_depth = par->bits_per_coded_sample;
962 if (par->codec_id == AV_CODEC_ID_AAC) {
963 ret = get_aac_sample_rates(s, par, &sample_rate, &output_sample_rate);
968 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
969 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
970 mkv->is_dash ? mkv->dash_track_number : i + 1);
971 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
972 mkv->is_dash ? mkv->dash_track_number : i + 1);
973 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
975 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
976 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
977 tag = av_dict_get(st->metadata, "language", NULL, 0);
978 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
979 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
980 } else if (tag && tag->value) {
981 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
984 // The default value for TRACKFLAGDEFAULT is 1, so add element
985 // if we need to clear it.
986 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
987 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
989 if (st->disposition & AV_DISPOSITION_FORCED)
990 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
992 if (mkv->mode == MODE_WEBM && par->codec_id == AV_CODEC_ID_WEBVTT) {
993 const char *codec_id;
994 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
995 codec_id = "D_WEBVTT/CAPTIONS";
996 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
997 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
998 codec_id = "D_WEBVTT/DESCRIPTIONS";
999 native_id = MATROSKA_TRACK_TYPE_METADATA;
1000 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1001 codec_id = "D_WEBVTT/METADATA";
1002 native_id = MATROSKA_TRACK_TYPE_METADATA;
1004 codec_id = "D_WEBVTT/SUBTITLES";
1005 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1007 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1009 // look for a codec ID string specific to mkv to use,
1010 // if none are found, use AVI codes
1011 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1012 if (ff_mkv_codec_tags[j].id == par->codec_id) {
1013 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1018 if (par->codec_id == AV_CODEC_ID_RAWVIDEO && !par->codec_tag) {
1019 if (mkv->allow_raw_vfw) {
1022 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1023 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1024 return AVERROR(EINVAL);
1029 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1030 int64_t codecdelay = av_rescale_q(par->initial_padding,
1031 (AVRational){ 1, 48000 },
1032 (AVRational){ 1, 1000000000 });
1033 if (codecdelay < 0) {
1034 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1035 return AVERROR(EINVAL);
1037 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1038 // (AVRational){ 1, par->sample_rate },
1041 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1043 if (par->codec_id == AV_CODEC_ID_OPUS) {
1044 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1047 if (mkv->mode == MODE_WEBM && !(par->codec_id == AV_CODEC_ID_VP8 ||
1048 par->codec_id == AV_CODEC_ID_VP9 ||
1049 par->codec_id == AV_CODEC_ID_OPUS ||
1050 par->codec_id == AV_CODEC_ID_VORBIS ||
1051 par->codec_id == AV_CODEC_ID_WEBVTT)) {
1052 av_log(s, AV_LOG_ERROR,
1053 "Only VP8 or VP9 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1054 return AVERROR(EINVAL);
1057 switch (par->codec_type) {
1058 case AVMEDIA_TYPE_VIDEO:
1059 mkv->have_video = 1;
1060 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1062 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1063 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1064 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1066 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->time_base.num / st->time_base.den);
1069 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1070 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1071 par->codec_id == AV_CODEC_ID_SVQ1 ||
1072 par->codec_id == AV_CODEC_ID_SVQ3 ||
1073 par->codec_id == AV_CODEC_ID_CINEPAK))
1077 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1078 else if (!native_id) {
1079 // if there is no mkv-specific codec ID, use VFW mode
1080 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1081 mkv->tracks[i].write_dts = 1;
1082 s->internal->avoid_negative_ts_use_pts = 0;
1085 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1087 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1088 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1090 if (mkv->mode != MODE_WEBM)
1091 mkv_write_field_order(pb, par->field_order);
1093 // check both side data and metadata for stereo information,
1094 // write the result to the bitstream if any is found
1095 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1097 &display_height_div);
1101 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1102 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1103 (par->format == AV_PIX_FMT_YUVA420P)) {
1104 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1107 // write DisplayWidth and DisplayHeight, they contain the size of
1108 // a single source view and/or the display aspect ratio
1109 if (st->sample_aspect_ratio.num) {
1110 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1111 if (d_width > INT_MAX) {
1112 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1113 return AVERROR(EINVAL);
1115 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1116 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1117 } else if (display_width_div != 1 || display_height_div != 1) {
1118 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1119 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1122 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1123 uint32_t color_space = av_le2ne32(par->codec_tag);
1124 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1126 if (s->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
1127 mkv_write_video_color(pb, par, st);
1129 end_ebml_master(pb, subinfo);
1132 case AVMEDIA_TYPE_AUDIO:
1133 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1136 // no mkv-specific ID, use ACM mode
1137 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1139 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1140 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1141 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1142 if (output_sample_rate)
1143 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1145 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1146 end_ebml_master(pb, subinfo);
1149 case AVMEDIA_TYPE_SUBTITLE:
1151 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1152 return AVERROR(ENOSYS);
1155 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1156 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1158 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1161 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1162 return AVERROR(EINVAL);
1165 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1166 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1171 end_ebml_master(pb, track);
1176 static int mkv_write_tracks(AVFormatContext *s)
1178 MatroskaMuxContext *mkv = s->priv_data;
1179 AVIOContext *pb = s->pb;
1181 int i, ret, default_stream_exists = 0;
1183 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
1187 tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
1188 for (i = 0; i < s->nb_streams; i++) {
1189 AVStream *st = s->streams[i];
1190 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1192 for (i = 0; i < s->nb_streams; i++) {
1193 ret = mkv_write_track(s, mkv, i, pb, default_stream_exists);
1197 end_ebml_master(pb, tracks);
1201 static int mkv_write_chapters(AVFormatContext *s)
1203 MatroskaMuxContext *mkv = s->priv_data;
1204 AVIOContext *pb = s->pb;
1205 ebml_master chapters, editionentry;
1206 AVRational scale = {1, 1E9};
1209 if (!s->nb_chapters || mkv->wrote_chapters)
1212 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1213 if (ret < 0) return ret;
1215 chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
1216 editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
1217 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1218 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1219 for (i = 0; i < s->nb_chapters; i++) {
1220 ebml_master chapteratom, chapterdisplay;
1221 AVChapter *c = s->chapters[i];
1222 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1223 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1224 AVDictionaryEntry *t = NULL;
1225 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1226 av_log(s, AV_LOG_ERROR,
1227 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1228 chapterstart, chapterend);
1229 return AVERROR_INVALIDDATA;
1232 chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
1233 put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1234 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1235 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1236 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1237 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1238 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1239 chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
1240 put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
1241 put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und");
1242 end_ebml_master(pb, chapterdisplay);
1244 end_ebml_master(pb, chapteratom);
1246 end_ebml_master(pb, editionentry);
1247 end_ebml_master(pb, chapters);
1249 mkv->wrote_chapters = 1;
1253 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1255 uint8_t *key = av_strdup(t->key);
1257 const uint8_t *lang = NULL;
1261 return AVERROR(ENOMEM);
1263 if ((p = strrchr(p, '-')) &&
1264 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1271 else if (*p >= 'a' && *p <= 'z')
1276 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1277 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1279 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1280 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1281 end_ebml_master(pb, tag);
1287 static int mkv_write_tag_targets(AVFormatContext *s,
1288 unsigned int elementid, unsigned int uid,
1289 ebml_master *tags, ebml_master* tag)
1291 MatroskaMuxContext *mkv = s->priv_data;
1292 ebml_master targets;
1296 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1297 if (ret < 0) return ret;
1299 *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
1302 *tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
1303 targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
1305 put_ebml_uint(s->pb, elementid, uid);
1306 end_ebml_master(s->pb, targets);
1310 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
1311 unsigned int uid, ebml_master *tags)
1315 AVDictionaryEntry *t = NULL;
1317 ret = mkv_write_tag_targets(s, elementid, uid, tags, &tag);
1321 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1322 if (av_strcasecmp(t->key, "title") &&
1323 av_strcasecmp(t->key, "stereo_mode") &&
1324 av_strcasecmp(t->key, "creation_time") &&
1325 av_strcasecmp(t->key, "encoding_tool") &&
1326 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1327 av_strcasecmp(t->key, "language"))) {
1328 ret = mkv_write_simpletag(s->pb, t);
1334 end_ebml_master(s->pb, tag);
1338 static int mkv_check_tag(AVDictionary *m)
1340 AVDictionaryEntry *t = NULL;
1342 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1343 if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode"))
1349 static int mkv_write_tags(AVFormatContext *s)
1351 MatroskaMuxContext *mkv = s->priv_data;
1352 ebml_master tags = {0};
1355 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1357 if (mkv_check_tag(s->metadata)) {
1358 ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
1359 if (ret < 0) return ret;
1362 for (i = 0; i < s->nb_streams; i++) {
1363 AVStream *st = s->streams[i];
1365 if (!mkv_check_tag(st->metadata))
1368 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
1369 if (ret < 0) return ret;
1372 if (!mkv->is_live) {
1373 for (i = 0; i < s->nb_streams; i++) {
1374 ebml_master tag_target;
1377 mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags, &tag_target);
1379 tag = start_ebml_master(s->pb, MATROSKA_ID_SIMPLETAG, 0);
1380 put_ebml_string(s->pb, MATROSKA_ID_TAGNAME, "DURATION");
1381 mkv->stream_duration_offsets[i] = avio_tell(s->pb);
1383 // Reserve space to write duration as a 20-byte string.
1384 // 2 (ebml id) + 1 (data size) + 20 (data)
1385 put_ebml_void(s->pb, 23);
1386 end_ebml_master(s->pb, tag);
1387 end_ebml_master(s->pb, tag_target);
1391 for (i = 0; i < s->nb_chapters; i++) {
1392 AVChapter *ch = s->chapters[i];
1394 if (!mkv_check_tag(ch->metadata))
1397 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &tags);
1398 if (ret < 0) return ret;
1402 end_ebml_master(s->pb, tags);
1406 static int mkv_write_attachments(AVFormatContext *s)
1408 MatroskaMuxContext *mkv = s->priv_data;
1409 AVIOContext *pb = s->pb;
1410 ebml_master attachments;
1414 if (!mkv->have_attachments)
1417 av_lfg_init(&c, av_get_random_seed());
1419 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1420 if (ret < 0) return ret;
1422 attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0);
1424 for (i = 0; i < s->nb_streams; i++) {
1425 AVStream *st = s->streams[i];
1426 ebml_master attached_file;
1427 AVDictionaryEntry *t;
1428 const char *mimetype = NULL;
1431 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1434 attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0);
1436 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1437 put_ebml_string(pb, MATROSKA_ID_FILEDESC, t->value);
1438 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1439 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1440 return AVERROR(EINVAL);
1442 put_ebml_string(pb, MATROSKA_ID_FILENAME, t->value);
1443 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1444 mimetype = t->value;
1445 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1447 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1448 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1449 mimetype = ff_mkv_mime_tags[i].str;
1452 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1453 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1454 mimetype = ff_mkv_image_mime_tags[i].str;
1459 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1460 "it cannot be deduced from the codec id.\n", i);
1461 return AVERROR(EINVAL);
1464 if (s->flags & AVFMT_FLAG_BITEXACT) {
1465 struct AVSHA *sha = av_sha_alloc();
1468 return AVERROR(ENOMEM);
1469 av_sha_init(sha, 160);
1470 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1471 av_sha_final(sha, digest);
1473 fileuid = AV_RL64(digest);
1475 fileuid = av_lfg_get(&c);
1477 av_log(s, AV_LOG_VERBOSE, "Using %.16"PRIx64" for attachment %d\n",
1480 put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype);
1481 put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1482 put_ebml_uint(pb, MATROSKA_ID_FILEUID, fileuid);
1483 end_ebml_master(pb, attached_file);
1485 end_ebml_master(pb, attachments);
1490 static int mkv_write_header(AVFormatContext *s)
1492 MatroskaMuxContext *mkv = s->priv_data;
1493 AVIOContext *pb = s->pb;
1494 ebml_master ebml_header, segment_info;
1495 AVDictionaryEntry *tag;
1496 int ret, i, version = 2;
1497 int64_t creation_time;
1499 if (!strcmp(s->oformat->name, "webm"))
1500 mkv->mode = MODE_WEBM;
1502 mkv->mode = MODE_MATROSKAv2;
1504 if (mkv->mode != MODE_WEBM ||
1505 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1506 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1509 for (i = 0; i < s->nb_streams; i++) {
1510 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
1511 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
1512 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
1513 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
1514 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
1515 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
1516 av_log(s, AV_LOG_ERROR,
1517 "The Matroska muxer does not yet support muxing %s\n",
1518 avcodec_get_name(s->streams[i]->codecpar->codec_id));
1519 return AVERROR_PATCHWELCOME;
1521 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1522 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1523 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1527 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1529 ret = AVERROR(ENOMEM);
1532 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1533 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1534 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1535 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1536 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1537 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1538 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1539 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1540 end_ebml_master(pb, ebml_header);
1542 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1543 mkv->segment_offset = avio_tell(pb);
1545 // we write 2 seek heads - one at the end of the file to point to each
1546 // cluster, and one at the beginning to point to all other level one
1547 // elements (including the seek head at the end of the file), which
1548 // isn't more than 10 elements if we only write one of each other
1549 // currently defined level 1 element
1550 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1551 if (!mkv->main_seekhead) {
1552 ret = AVERROR(ENOMEM);
1556 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1557 if (ret < 0) goto fail;
1559 segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
1560 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1561 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1562 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1563 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1564 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1565 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1566 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1568 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1570 if (mkv->mode != MODE_WEBM) {
1571 uint32_t segment_uid[4];
1574 av_lfg_init(&lfg, av_get_random_seed());
1576 for (i = 0; i < 4; i++)
1577 segment_uid[i] = av_lfg_get(&lfg);
1579 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1582 const char *ident = "Lavf";
1583 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1584 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1587 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1588 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1589 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1590 uint8_t date_utc_buf[8];
1591 AV_WB64(date_utc_buf, date_utc);
1592 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1595 // reserve space for the duration
1597 mkv->duration_offset = avio_tell(pb);
1598 if (!mkv->is_live) {
1599 put_ebml_void(pb, 11); // assumes double-precision float to be written
1601 end_ebml_master(pb, segment_info);
1603 // initialize stream_duration fields
1604 mkv->stream_durations = av_mallocz(s->nb_streams * sizeof(int64_t));
1605 mkv->stream_duration_offsets = av_mallocz(s->nb_streams * sizeof(int64_t));
1607 ret = mkv_write_tracks(s);
1611 for (i = 0; i < s->nb_chapters; i++)
1612 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1614 if (mkv->mode != MODE_WEBM) {
1615 ret = mkv_write_chapters(s);
1619 ret = mkv_write_tags(s);
1623 ret = mkv_write_attachments(s);
1628 if (!s->pb->seekable && !mkv->is_live)
1629 mkv_write_seekhead(pb, mkv);
1631 mkv->cues = mkv_start_cues(mkv->segment_offset);
1633 ret = AVERROR(ENOMEM);
1636 if (pb->seekable && mkv->reserve_cues_space) {
1637 mkv->cues_pos = avio_tell(pb);
1638 put_ebml_void(pb, mkv->reserve_cues_space);
1641 av_init_packet(&mkv->cur_audio_pkt);
1642 mkv->cur_audio_pkt.size = 0;
1643 mkv->cluster_pos = -1;
1647 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1648 // after 4k and on a keyframe
1650 if (mkv->cluster_time_limit < 0)
1651 mkv->cluster_time_limit = 5000;
1652 if (mkv->cluster_size_limit < 0)
1653 mkv->cluster_size_limit = 5 * 1024 * 1024;
1655 if (mkv->cluster_time_limit < 0)
1656 mkv->cluster_time_limit = 1000;
1657 if (mkv->cluster_size_limit < 0)
1658 mkv->cluster_size_limit = 32 * 1024;
1667 static int mkv_blockgroup_size(int pkt_size)
1669 int size = pkt_size + 4;
1670 size += ebml_num_size(size);
1671 size += 2; // EBML ID for block and block duration
1672 size += 8; // max size of block duration
1673 size += ebml_num_size(size);
1674 size += 1; // blockgroup EBML ID
1678 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1685 dst = av_malloc(srclen);
1687 return AVERROR(ENOMEM);
1689 while (srclen >= WV_HEADER_SIZE) {
1692 ret = ff_wv_parse_header(&header, src);
1695 src += WV_HEADER_SIZE;
1696 srclen -= WV_HEADER_SIZE;
1698 if (srclen < header.blocksize) {
1699 ret = AVERROR_INVALIDDATA;
1703 if (header.initial) {
1704 AV_WL32(dst + offset, header.samples);
1707 AV_WL32(dst + offset, header.flags);
1708 AV_WL32(dst + offset + 4, header.crc);
1711 if (!(header.initial && header.final)) {
1712 AV_WL32(dst + offset, header.blocksize);
1716 memcpy(dst + offset, src, header.blocksize);
1717 src += header.blocksize;
1718 srclen -= header.blocksize;
1719 offset += header.blocksize;
1731 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1732 unsigned int blockid, AVPacket *pkt, int keyframe)
1734 MatroskaMuxContext *mkv = s->priv_data;
1735 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1736 uint8_t *data = NULL, *side_data = NULL;
1737 int offset = 0, size = pkt->size, side_data_size = 0;
1738 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1739 uint64_t additional_id = 0;
1740 int64_t discard_padding = 0;
1741 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
1742 ebml_master block_group, block_additions, block_more;
1744 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1745 "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", keyframe %d\n",
1746 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration,
1748 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
1749 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
1750 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1751 else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
1752 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
1753 /* extradata is Annex B, assume the bitstream is too and convert it */
1754 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1755 else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
1756 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
1758 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
1764 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
1765 /* Matroska specification requires to remove the first QuickTime atom
1771 side_data = av_packet_get_side_data(pkt,
1772 AV_PKT_DATA_SKIP_SAMPLES,
1775 if (side_data && side_data_size >= 10) {
1776 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
1777 (AVRational){1, par->sample_rate},
1778 (AVRational){1, 1000000000});
1781 side_data = av_packet_get_side_data(pkt,
1782 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
1785 additional_id = AV_RB64(side_data);
1787 side_data_size -= 8;
1790 if ((side_data_size && additional_id == 1) || discard_padding) {
1791 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
1792 blockid = MATROSKA_ID_BLOCK;
1795 put_ebml_id(pb, blockid);
1796 put_ebml_num(pb, size + 4, 0);
1797 // this assumes stream_index is less than 126
1798 avio_w8(pb, 0x80 | track_number);
1799 avio_wb16(pb, ts - mkv->cluster_pts);
1800 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
1801 avio_write(pb, data + offset, size);
1802 if (data != pkt->data)
1805 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
1806 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE,
1807 mkv->last_track_timestamp[track_number - 1]);
1809 mkv->last_track_timestamp[track_number - 1] = ts - mkv->cluster_pts;
1811 if (discard_padding) {
1812 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
1815 if (side_data_size && additional_id == 1) {
1816 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
1817 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
1818 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
1819 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
1820 put_ebml_num(pb, side_data_size, 0);
1821 avio_write(pb, side_data, side_data_size);
1822 end_ebml_master(pb, block_more);
1823 end_ebml_master(pb, block_additions);
1825 if ((side_data_size && additional_id == 1) || discard_padding) {
1826 end_ebml_master(pb, block_group);
1830 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1832 MatroskaMuxContext *mkv = s->priv_data;
1833 ebml_master blockgroup;
1834 int id_size, settings_size, size;
1835 uint8_t *id, *settings;
1836 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1837 const int flags = 0;
1840 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
1844 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
1847 size = id_size + 1 + settings_size + 1 + pkt->size;
1849 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1850 "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", flags %d\n",
1851 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
1853 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1855 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1856 put_ebml_num(pb, size + 4, 0);
1857 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1858 avio_wb16(pb, ts - mkv->cluster_pts);
1860 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
1862 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
1863 end_ebml_master(pb, blockgroup);
1865 return pkt->duration;
1868 static void mkv_flush_dynbuf(AVFormatContext *s)
1870 MatroskaMuxContext *mkv = s->priv_data;
1877 bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
1878 avio_write(s->pb, dyn_buf, bufsize);
1883 static void mkv_start_new_cluster(AVFormatContext *s, AVPacket *pkt)
1885 MatroskaMuxContext *mkv = s->priv_data;
1888 if (s->pb->seekable) {
1894 av_log(s, AV_LOG_DEBUG,
1895 "Starting new cluster at offset %" PRIu64 " bytes, "
1896 "pts %" PRIu64 "dts %" PRIu64 "\n",
1897 avio_tell(pb), pkt->pts, pkt->dts);
1898 end_ebml_master(pb, mkv->cluster);
1899 mkv->cluster_pos = -1;
1901 mkv_flush_dynbuf(s);
1905 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
1907 MatroskaMuxContext *mkv = s->priv_data;
1908 AVIOContext *pb = s->pb;
1909 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1910 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1911 int duration = pkt->duration;
1913 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1914 int64_t relative_packet_pos;
1915 int dash_tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
1917 if (ts == AV_NOPTS_VALUE) {
1918 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
1919 return AVERROR(EINVAL);
1921 ts += mkv->tracks[pkt->stream_index].ts_offset;
1923 if (mkv->cluster_pos != -1) {
1924 int64_t cluster_time = ts - mkv->cluster_pts + mkv->tracks[pkt->stream_index].ts_offset;
1925 if ((int16_t)cluster_time != cluster_time) {
1926 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
1927 mkv_start_new_cluster(s, pkt);
1931 if (!s->pb->seekable) {
1933 ret = avio_open_dyn_buf(&mkv->dyn_bc);
1935 av_log(s, AV_LOG_ERROR, "Failed to open dynamic buffer\n");
1942 if (mkv->cluster_pos == -1) {
1943 mkv->cluster_pos = avio_tell(s->pb);
1944 mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
1945 put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
1946 mkv->cluster_pts = FFMAX(0, ts);
1949 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1951 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1952 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
1953 if (s->pb->seekable && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
1954 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
1955 if (ret < 0) return ret;
1958 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1959 duration = mkv_write_vtt_blocks(s, pb, pkt);
1961 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1962 mkv_blockgroup_size(pkt->size));
1964 #if FF_API_CONVERGENCE_DURATION
1965 FF_DISABLE_DEPRECATION_WARNINGS
1966 /* For backward compatibility, prefer convergence_duration. */
1967 if (pkt->convergence_duration > 0) {
1968 duration = pkt->convergence_duration;
1970 FF_ENABLE_DEPRECATION_WARNINGS
1972 /* All subtitle blocks are considered to be keyframes. */
1973 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
1974 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1975 end_ebml_master(pb, blockgroup);
1978 if (s->pb->seekable) {
1979 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts,
1980 mkv->cluster_pos, relative_packet_pos, duration);
1986 mkv->duration = FFMAX(mkv->duration, ts + duration);
1988 if (mkv->stream_durations)
1989 mkv->stream_durations[pkt->stream_index] =
1990 FFMAX(mkv->stream_durations[pkt->stream_index], ts + duration);
1995 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
1997 MatroskaMuxContext *mkv = s->priv_data;
1998 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
1999 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2001 int64_t cluster_time;
2003 int start_new_cluster;
2005 if (mkv->tracks[pkt->stream_index].write_dts)
2006 cluster_time = pkt->dts - mkv->cluster_pts;
2008 cluster_time = pkt->pts - mkv->cluster_pts;
2009 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2011 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
2012 // after 4k and on a keyframe
2013 if (s->pb->seekable) {
2014 cluster_size = avio_tell(s->pb) - mkv->cluster_pos;
2016 cluster_size = avio_tell(mkv->dyn_bc);
2019 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2020 // WebM DASH specification states that the first block of every cluster
2021 // has to be a key frame. So for DASH video, we only create a cluster
2022 // on seeing key frames.
2023 start_new_cluster = keyframe;
2024 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2025 (mkv->cluster_pos == -1 ||
2026 cluster_time > mkv->cluster_time_limit)) {
2027 // For DASH audio, we create a Cluster based on cluster_time_limit
2028 start_new_cluster = 1;
2029 } else if (!mkv->is_dash &&
2030 (cluster_size > mkv->cluster_size_limit ||
2031 cluster_time > mkv->cluster_time_limit ||
2032 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2033 cluster_size > 4 * 1024))) {
2034 start_new_cluster = 1;
2036 start_new_cluster = 0;
2039 if (mkv->cluster_pos != -1 && start_new_cluster) {
2040 mkv_start_new_cluster(s, pkt);
2043 if (!mkv->cluster_pos)
2044 avio_write_marker(s->pb,
2045 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2046 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2048 // check if we have an audio packet cached
2049 if (mkv->cur_audio_pkt.size > 0) {
2050 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2051 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2052 mkv->is_dash ? start_new_cluster : 0);
2053 av_packet_unref(&mkv->cur_audio_pkt);
2055 av_log(s, AV_LOG_ERROR,
2056 "Could not write cached audio packet ret:%d\n", ret);
2061 // buffer an audio packet to ensure the packet containing the video
2062 // keyframe's timecode is contained in the same cluster for WebM
2063 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2064 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2066 ret = mkv_write_packet_internal(s, pkt, 0);
2070 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2072 MatroskaMuxContext *mkv = s->priv_data;
2074 if (s->pb->seekable)
2079 if (mkv->cluster_pos != -1) {
2080 av_log(s, AV_LOG_DEBUG,
2081 "Flushing cluster at offset %" PRIu64 " bytes\n",
2083 end_ebml_master(pb, mkv->cluster);
2084 mkv->cluster_pos = -1;
2086 mkv_flush_dynbuf(s);
2091 return mkv_write_packet(s, pkt);
2094 static int mkv_write_trailer(AVFormatContext *s)
2096 MatroskaMuxContext *mkv = s->priv_data;
2097 AVIOContext *pb = s->pb;
2098 int64_t currentpos, cuespos;
2101 // check if we have an audio packet cached
2102 if (mkv->cur_audio_pkt.size > 0) {
2103 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2104 av_packet_unref(&mkv->cur_audio_pkt);
2106 av_log(s, AV_LOG_ERROR,
2107 "Could not write cached audio packet ret:%d\n", ret);
2113 end_ebml_master(mkv->dyn_bc, mkv->cluster);
2114 mkv_flush_dynbuf(s);
2115 } else if (mkv->cluster_pos != -1) {
2116 end_ebml_master(pb, mkv->cluster);
2119 if (mkv->mode != MODE_WEBM) {
2120 ret = mkv_write_chapters(s);
2126 if (mkv->cues->num_entries) {
2127 if (mkv->reserve_cues_space) {
2130 currentpos = avio_tell(pb);
2131 avio_seek(pb, mkv->cues_pos, SEEK_SET);
2133 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2134 cues_end = avio_tell(pb);
2135 if (cues_end > cuespos + mkv->reserve_cues_space) {
2136 av_log(s, AV_LOG_ERROR,
2137 "Insufficient space reserved for cues: %d "
2138 "(needed: %" PRId64 ").\n",
2139 mkv->reserve_cues_space, cues_end - cuespos);
2140 return AVERROR(EINVAL);
2143 if (cues_end < cuespos + mkv->reserve_cues_space)
2144 put_ebml_void(pb, mkv->reserve_cues_space -
2145 (cues_end - cuespos));
2147 avio_seek(pb, currentpos, SEEK_SET);
2149 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2152 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES,
2158 mkv_write_seekhead(pb, mkv);
2160 // update the duration
2161 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2162 currentpos = avio_tell(pb);
2163 avio_seek(pb, mkv->duration_offset, SEEK_SET);
2164 put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
2166 // update stream durations
2167 if (mkv->stream_durations) {
2169 for (i = 0; i < s->nb_streams; ++i) {
2170 AVStream *st = s->streams[i];
2171 double duration_sec = mkv->stream_durations[i] * av_q2d(st->time_base);
2172 char duration_string[20] = "";
2174 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2175 mkv->stream_durations[i]);
2177 if (!mkv->is_live && mkv->stream_duration_offsets[i] > 0) {
2178 avio_seek(pb, mkv->stream_duration_offsets[i], SEEK_SET);
2180 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2181 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2182 fmod(duration_sec, 60));
2184 put_ebml_binary(pb, MATROSKA_ID_TAGSTRING, duration_string, 20);
2189 avio_seek(pb, currentpos, SEEK_SET);
2192 if (!mkv->is_live) {
2193 end_ebml_master(pb, mkv->segment);
2200 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2203 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2204 if (ff_mkv_codec_tags[i].id == codec_id)
2207 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2208 enum AVMediaType type = avcodec_get_type(codec_id);
2209 // mkv theoretically supports any video/audio through VFW/ACM
2210 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2217 static int mkv_init(struct AVFormatContext *s)
2221 if (s->avoid_negative_ts < 0) {
2222 s->avoid_negative_ts = 1;
2223 s->internal->avoid_negative_ts_use_pts = 1;
2226 for (i = 0; i < s->nb_streams; i++) {
2227 // ms precision is the de-facto standard timescale for mkv files
2228 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2234 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2237 AVStream *st = s->streams[pkt->stream_index];
2239 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2240 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2241 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2242 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2243 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2249 static const AVCodecTag additional_audio_tags[] = {
2250 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2251 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
2252 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2253 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2254 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2255 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2256 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2257 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2258 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2259 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2260 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2261 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2262 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2265 static const AVCodecTag additional_video_tags[] = {
2266 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2267 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2268 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2269 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
2270 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
2271 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2274 static const AVCodecTag additional_subtitle_tags[] = {
2275 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2276 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2277 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2280 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2281 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2282 static const AVOption options[] = {
2283 { "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 },
2284 { "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 },
2285 { "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 },
2286 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2287 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2288 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2289 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2293 #if CONFIG_MATROSKA_MUXER
2294 static const AVClass matroska_class = {
2295 .class_name = "matroska muxer",
2296 .item_name = av_default_item_name,
2298 .version = LIBAVUTIL_VERSION_INT,
2301 AVOutputFormat ff_matroska_muxer = {
2303 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2304 .mime_type = "video/x-matroska",
2305 .extensions = "mkv",
2306 .priv_data_size = sizeof(MatroskaMuxContext),
2307 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2308 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2309 .video_codec = CONFIG_LIBX264_ENCODER ?
2310 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2312 .write_header = mkv_write_header,
2313 .write_packet = mkv_write_flush_packet,
2314 .write_trailer = mkv_write_trailer,
2315 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2316 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2317 .codec_tag = (const AVCodecTag* const []){
2318 ff_codec_bmp_tags, ff_codec_wav_tags,
2319 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2321 .subtitle_codec = AV_CODEC_ID_ASS,
2322 .query_codec = mkv_query_codec,
2323 .check_bitstream = mkv_check_bitstream,
2324 .priv_class = &matroska_class,
2328 #if CONFIG_WEBM_MUXER
2329 static const AVClass webm_class = {
2330 .class_name = "webm muxer",
2331 .item_name = av_default_item_name,
2333 .version = LIBAVUTIL_VERSION_INT,
2336 AVOutputFormat ff_webm_muxer = {
2338 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2339 .mime_type = "video/webm",
2340 .extensions = "webm",
2341 .priv_data_size = sizeof(MatroskaMuxContext),
2342 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2343 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2344 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2346 .write_header = mkv_write_header,
2347 .write_packet = mkv_write_flush_packet,
2348 .write_trailer = mkv_write_trailer,
2349 .check_bitstream = mkv_check_bitstream,
2350 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2351 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2352 .priv_class = &webm_class,
2356 #if CONFIG_MATROSKA_AUDIO_MUXER
2357 static const AVClass mka_class = {
2358 .class_name = "matroska audio muxer",
2359 .item_name = av_default_item_name,
2361 .version = LIBAVUTIL_VERSION_INT,
2363 AVOutputFormat ff_matroska_audio_muxer = {
2365 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2366 .mime_type = "audio/x-matroska",
2367 .extensions = "mka",
2368 .priv_data_size = sizeof(MatroskaMuxContext),
2369 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2370 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2371 .video_codec = AV_CODEC_ID_NONE,
2373 .write_header = mkv_write_header,
2374 .write_packet = mkv_write_flush_packet,
2375 .write_trailer = mkv_write_trailer,
2376 .check_bitstream = mkv_check_bitstream,
2377 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2379 .codec_tag = (const AVCodecTag* const []){
2380 ff_codec_wav_tags, additional_audio_tags, 0
2382 .priv_class = &mka_class,