Matroska node parser
npm install matroskaFast and incomplete parsing of a mkv file: (we keep only metadatas)
``js
var matroska = require('matroska');
var url="http://download.wavetlan.com/SVV/Media/HTTP/mkv/H264_PCM(mkvmerge).mkv";
matroska.Decoder.parseInfoTagsAndAttachments(url, function(error, document) {
if (error) {
console.error(error);
return;
}
console.log(document.print());
});
`
Returns a tree: (format: offset#tagId * node)
``
0#0 * Document [HttpSource url=http://download.wavetlan.com/SVV/Media/HTTP/mkv/H264_PCM(mkvmerge).mkv]
0#1 * EBML children[size=40]
5#2 * EBMLVersion u[1]=1
9#3 * EBMLReadVersion u[1]=1
13#4 * EBMLMaxIDLength u[1]=4
17#5 * EBMLMaxSizeLength u[1]=8
21#6 * DocType s[8]='matroska'
32#7 * DocTypeVersion u[1]=2
36#8 * DocTypeReadVersion u[1]=2
40#9 * Segment children[size=40316440]
52#10 * SeekHead children[size=52]
57#11 * Seek children[size=15]
60#12 * SeekID b[4]=1549a966 => Info
67#13 * SeekPosition u[2]=4099 [=>#20]
72#14 * Seek children[size=15]
75#15 * SeekID b[4]=1654ae6b => Tracks
82#16 * SeekPosition u[2]=4248
87#17 * Seek children[size=17]
90#18 * SeekID b[4]=1c53bb6b => Cues
97#19 * SeekPosition u[4]=40315034
4151#20 * Info children[size=149]
4157#21 * TimecodeScale u[3]=1000000
4164#22 * MuxingApp 8[35]='libebml v1.2.1 + libmatroska v1.1.1'
4202#23 * WritingApp 8[58]='mkvmerge v4.9.1 ('Ich will') built on Jul 11 2011 23:53:15'
4263#24 * Duration f[4]=388000
4270#25 * DateUTC d[8]=Fri Sep 23 2011 00:33:39 GMT+0200 (Paris, Madrid (heure d’été))
4281#26 * SegmentUID b[16]=8e9c49d7b307eb148bd386041b43d6ca
Complete parsing of a mkv:
`js
var matroska = require('matroska');
var url="http://download.wavetlan.com/SVV/Media/HTTP/mkv/H264_mp3(mkvmerge).mkv";
var decoder = new matroska.Decoder();
decoder.parse(url, function(error, document) {
if (error) {
console.error(error);
return;
}
console.log(document.print());
});
`
Returns:
`
0#0 * Document [FileSource file=G:\Downloads\H264_mp3(mkvmerge).mkv]
0#1 * EBML children[size=40]
5#2 * EBMLVersion u[1]=1
9#3 * EBMLReadVersion u[1]=1
13#4 * EBMLMaxIDLength u[1]=4
17#5 * EBMLMaxSizeLength u[1]=8
21#6 * DocType s[8]='matroska'
32#7 * DocTypeVersion u[1]=2
36#8 * DocTypeReadVersion u[1]=2
40#9 * Segment children[size=3661175]
52#10 * SeekHead children[size=51]
57#11 * Seek children[size=15]
60#12 * SeekID b[4]=1549a966 => Info
67#13 * SeekPosition u[2]=4099 [=>#21]
72#14 * Seek children[size=15]
75#15 * SeekID b[4]=1654ae6b => Tracks
82#16 * SeekPosition u[2]=4248 [=>#28]
87#17 * Seek children[size=16]
90#18 * SeekID b[4]=1c53bb6b => Cues
97#19 * SeekPosition u[3]=3660935 [=>#2109]
103#20 * Void b[4045]
4151#21 * Info children[size=149]
4157#22 * TimecodeScale u[3]=1000000
4164#23 * MuxingApp 8[35]='libebml v1.2.1 + libmatroska v1.1.1'
4202#24 * WritingApp 8[58]='mkvmerge v4.9.1 ('Ich will') built on Jul 11 2011 23:53:15'
4263#25 * Duration f[4]=69956
4270#26 * DateUTC d[8]=Fri Sep 23 2011 00:17:39 GMT+0200 (Paris, Madrid (heure d’été))
4281#27 * SegmentUID b[16]=bcb1c3b73d5109e98863c2955602b063
4300#28 * Tracks children[size=217]
4306#29 * TrackEntry children[size=142]
4309#30 * TrackNumber u[1]=1
4312#31 * TrackUID u[4]=644805295
4319#32 * TrackType u[1]=1
4322#33 * FlagLacing u[1]=0
4325#34 * MinCache u[1]=1
4329#35 * CodecID s[15]='V_MPEG4/ISO/AVC'
4346#36 * CodecPrivate b[43]=0142c00cffe1001c6742c00c9a740501edff807800c988000003000800000301
4392#37 * DefaultDuration u[4]=41666666
4400#38 * Language s[3]='und'
4407#39 * Video children[size=24]
4409#40 * PixelWidth u[2]=640
4413#41 * PixelHeight u[2]=480
4417#42 * DisplayWidth u[4]=640
4424#43 * DisplayHeight u[4]=806
4431#44 * ContentEncodings children[size=17]
4434#45 * ContentEncoding children[size=14]
4437#46 * ContentCompression children[size=11]
4440#47 * ContentCompAlgo u[1]=3
4444#48 * ContentCompSettings b[1]=00
4448#49 * TrackEntry children[size=69]
4450#50 * TrackNumber u[1]=2
4453#51 * TrackUID u[4]=1713889946
4460#52 * TrackType u[1]=2
4463#53 * CodecID s[9]='A_MPEG/L3'
4474#54 * DefaultDuration u[4]=26122448
4482#55 * Language s[3]='und'
4489#56 * Audio children[size=11]
4491#57 * SamplingFrequency f[4]=22050
4497#58 * Channels u[1]=2
4500#59 * ContentEncodings children[size=17]
4503#60 * ContentEncoding children[size=14]
4506#61 * ContentCompression children[size=11]
4509#62 * ContentCompAlgo u[1]=3
4513#63 * ContentCompSettings b[1]=ff
4517#64 * Void b[1108]
5628#65 * Cluster children[size=290112]
5635#66 * Timecode u[1]=0
5638#67 * SimpleBlock b[1439]
7080#68 * SimpleBlock b[4184]
11267#69 * SimpleBlock b[134]
11404#70 * SimpleBlock b[19]
11425#71 * SimpleBlock b[308]
...
288918#206 * SimpleBlock b[1573]
290494#207 * SimpleBlock b[5243]
295740#208 * Cluster children[size=246364]
295747#209 * Timecode u[2]=4875
295751#210 * SimpleBlock b[2613]
...
3397072#1958 * SimpleBlock b[2136]
3399211#1959 * Cluster children[size=259667]
3399218#1960 * Timecode u[2]=64833
3399222#1961 * SimpleBlock b[3913]
...
3657216#2101 * SimpleBlock b[148]
3657367#2102 * SimpleBlock b[1268]
3658638#2103 * BlockGroup children[size=240]
3658641#2104 * Block b[231]
3658875#2105 * ReferenceBlock i[1]=-42
3658878#2106 * Cluster children[size=2109]
3658884#2107 * Timecode u[3]=69851
3658889#2108 * SimpleBlock b[2095]
3660987#2109 * Cues children[size=228]
3660993#2110 * CuePoint children[size=14]
3660995#2111 * CueTime u[1]=0
3660998#2112 * CueTrackPositions children[size=9]
3661000#2113 * CueTrack u[1]=1
3661003#2114 * CueClusterPosition u[2]=5576 [=>#65]
3661007#2115 * CuePoint children[size=16]
3661009#2116 * CueTime u[2]=4875
3661013#2117 * CueTrackPositions children[size=10]
3661015#2118 * CueTrack u[1]=1
3661018#2119 * CueClusterPosition u[3]=295688 [=>#208]
...
3661199#2175 * CuePoint children[size=16]
3661201#2176 * CueTime u[2]=64833
3661205#2177 * CueTrackPositions children[size=10]
3661207#2178 * CueTrack u[1]=1
3661210#2179 * CueClusterPosition u[3]=3399159 [=>#1959]
``
... it works, samples soon :-)