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xml2mkv
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xml2mkv
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#!/usr/bin/env python
# Read mkv2xml's output and convert it back to matroska file (not verbatim). License=MIT, 2012, Vitaly "_Vi" Shukela
# There are special rules for "SimpleBlock"/"Block" and "block" elements:
# "SimpleBlock" / "Block" should be in corresponding <Cluster>s / <BlockGroup>s respectively
# <duration> is ignored, <timecode> should be somewhere near Cluster's Timecode
# (note that Cluster's Timecode and this timecode have different formats:
# <Timecode>560000</Timecode> is just copied verbatim to matroska file as number, but
# <timecode>0.56</timecode> is converted to nanoseconds,
# scaled according to TimecodeScale and then stored into mkv.
# "block" should be in <Segment> and xml2mkv creates <Cluster> and/or <BlockGroup> automatically for them
# , using <duration> element.
# <timecode>s in blocks are absolute, unlike in actual matroska files
# Both
# cat somefile.mkv | ./mkv2xml | ./xml2mkv | mplayer -
# and
# cat somefile.mkv | ./mkv2xml -C | ./xml2mkv | mplayer -
# should work.
#
# You can edit mkv file on the fly with chain like
# ./mkv2xml -C < somefile.mkv | xml2 | sed 's!duration=.*!duration=2!' | 2xml | ./xml2mkv | mpv -
#
# (xml2/2xml are from another family of converters that can be used in conjunction with mkv2xml/xml2mkv
# without buffering entire content in memory)
import sys
from xml.sax import make_parser, handler
from struct import pack
import binascii
if sys.version < '3':
reload(sys)
sys.setdefaultencoding('utf-8') # hack to stop failing on Unicodish subtitles
maybe_encode=lambda x:x
range = xrange
maybe_encode_utf8=lambda x:x
else:
def maybe_encode(x):
if type(x) == str:
return x.encode("ascii")
else:
return x
chr=lambda x:bytes((x,))
maybe_encode_utf8=lambda x:x.encode("UTF-8")
def big_endian_number(number, signed=False):
if number<0:
r=0x100
while number + r < r/2:
r<<=8
number+=r
if number<0x100:
return chr(number)
signed=False
elif (number<0x100 and not signed) or number < 0x80:
return chr(number)
return big_endian_number(number>>8, signed) + chr(number&0xFF)
ben=big_endian_number
def ebml_encode_number(number):
def trailing_bits(rest_of_number, number_of_bits):
# like big_endian_number, but can do padding zeroes
if number_of_bits==8:
return chr(rest_of_number&0xFF);
else:
return trailing_bits(rest_of_number>>8, number_of_bits-8) + chr(rest_of_number&0xFF)
if number == -1:
return chr(0xFF)
if number < 2**7 - 1:
return chr(number|0x80)
if number < 2**14 - 1:
return chr(0x40 | (number>>8)) + trailing_bits(number, 8)
if number < 2**21 - 1:
return chr(0x20 | (number>>16)) + trailing_bits(number, 16)
if number < 2**28 - 1:
return chr(0x10 | (number>>24)) + trailing_bits(number, 24)
if number < 2**35 - 1:
return chr(0x08 | (number>>32)) + trailing_bits(number, 32)
if number < 2**42 - 1:
return chr(0x04 | (number>>40)) + trailing_bits(number, 40)
if number < 2**49 - 1:
return chr(0x02 | (number>>48)) + trailing_bits(number, 48)
if number < 2**56 - 1:
return chr(0x01) + trailing_bits(number, 56)
raise Exception("NUMBER TOO BIG")
class EbmlElementType:
VOID=0
MASTER=1 # read all subelements and return tree. Don't use this too large things like Segment
UNSIGNED=2
SIGNED=3
TEXTA=4
TEXTU=5
BINARY=6
FLOAT=7
DATE=8
JUST_GO_ON=10 # For "Segment".
# Actually MASTER, but don't build the tree for all subelements,
# interpreting all child elements as if they were top-level elements
EET=EbmlElementType
# lynx -width=10000 -dump http://matroska.org/technical/specs/index.html | sed 's/not 0/not0/g; s/> 0/>0/g; s/Sampling Frequency/SamplingFrequency/g' | awk '{print $1 " " $3 " " $8}' | grep '\[..\]' | perl -ne '/(\S+) (\S+) (.)/; $name=$1; $id=$2; $type=$3; $id=~s/\[|\]//g; %types = (m=>"EET.MASTER", u=>"EET.UNSIGNED", i=>"EET.SIGNED", 8=>"EET.TEXTU", s=>"EET.TEXTA", b=>"EET.BINARY", f=>"EET.FLOAT", d=>"EET.DATE"); $t=$types{$type}; next unless $t; $id=~s/../\\x$&/g; $t="EET.JUST_GO_ON" if $name eq "Segment" or $name eq "Cluster"; print "\t\"$name\": (\"$id\", $t),\n";'
element_types_names = {
"EBML": (b"\x1A\x45\xDF\xA3", EET.MASTER),
"EBMLVersion": (b"\x42\x86", EET.UNSIGNED),
"EBMLReadVersion": (b"\x42\xF7", EET.UNSIGNED),
"EBMLMaxIDLength": (b"\x42\xF2", EET.UNSIGNED),
"EBMLMaxSizeLength": (b"\x42\xF3", EET.UNSIGNED),
"DocType": (b"\x42\x82", EET.TEXTA),
"DocTypeVersion": (b"\x42\x87", EET.UNSIGNED),
"DocTypeReadVersion": (b"\x42\x85", EET.UNSIGNED),
"Void": (b"\xEC", EET.BINARY),
"CRC-32": (b"\xBF", EET.BINARY),
"SignatureSlot": (b"\x1B\x53\x86\x67", EET.MASTER),
"SignatureAlgo": (b"\x7E\x8A", EET.UNSIGNED),
"SignatureHash": (b"\x7E\x9A", EET.UNSIGNED),
"SignaturePublicKey": (b"\x7E\xA5", EET.BINARY),
"Signature": (b"\x7E\xB5", EET.BINARY),
"SignatureElements": (b"\x7E\x5B", EET.MASTER),
"SignatureElementList": (b"\x7E\x7B", EET.MASTER),
"SignedElement": (b"\x65\x32", EET.BINARY),
"Segment": (b"\x18\x53\x80\x67", EET.JUST_GO_ON),
"SeekHead": (b"\x11\x4D\x9B\x74", EET.MASTER),
"Seek": (b"\x4D\xBB", EET.MASTER),
"SeekID": (b"\x53\xAB", EET.BINARY),
"SeekPosition": (b"\x53\xAC", EET.UNSIGNED),
"Info": (b"\x15\x49\xA9\x66", EET.MASTER),
"SegmentUID": (b"\x73\xA4", EET.BINARY),
"SegmentFilename": (b"\x73\x84", EET.TEXTU),
"PrevUID": (b"\x3C\xB9\x23", EET.BINARY),
"PrevFilename": (b"\x3C\x83\xAB", EET.TEXTU),
"NextUID": (b"\x3E\xB9\x23", EET.BINARY),
"NextFilename": (b"\x3E\x83\xBB", EET.TEXTU),
"SegmentFamily": (b"\x44\x44", EET.BINARY),
"ChapterTranslate": (b"\x69\x24", EET.MASTER),
"ChapterTranslateEditionUID": (b"\x69\xFC", EET.UNSIGNED),
"ChapterTranslateCodec": (b"\x69\xBF", EET.UNSIGNED),
"ChapterTranslateID": (b"\x69\xA5", EET.BINARY),
"TimecodeScale": (b"\x2A\xD7\xB1", EET.UNSIGNED),
"TimestampScale": (b"\x2A\xD7\xB1", EET.UNSIGNED),
"Duration": (b"\x44\x89", EET.FLOAT),
"DateUTC": (b"\x44\x61", EET.DATE),
"Title": (b"\x7B\xA9", EET.TEXTU),
"MuxingApp": (b"\x4D\x80", EET.TEXTU),
"WritingApp": (b"\x57\x41", EET.TEXTU),
"Cluster": (b"\x1F\x43\xB6\x75", EET.JUST_GO_ON),
"Timecode": (b"\xE7", EET.UNSIGNED),
"Timestamp": (b"\xE7", EET.UNSIGNED),
"SilentTracks": (b"\x58\x54", EET.MASTER),
"SilentTrackNumber": (b"\x58\xD7", EET.UNSIGNED),
"Position": (b"\xA7", EET.UNSIGNED),
"PrevSize": (b"\xAB", EET.UNSIGNED),
"SimpleBlock": (b"\xA3", EET.BINARY),
"BlockGroup": (b"\xA0", EET.MASTER),
"Block": (b"\xA1", EET.BINARY),
"BlockVirtual": (b"\xA2", EET.BINARY),
"BlockAdditions": (b"\x75\xA1", EET.MASTER),
"BlockMore": (b"\xA6", EET.MASTER),
"BlockAddID": (b"\xEE", EET.UNSIGNED),
"BlockAdditional": (b"\xA5", EET.BINARY),
"BlockDuration": (b"\x9B", EET.UNSIGNED),
"ReferencePriority": (b"\xFA", EET.UNSIGNED),
"ReferenceBlock": (b"\xFB", EET.SIGNED),
"ReferenceVirtual": (b"\xFD", EET.SIGNED),
"CodecState": (b"\xA4", EET.BINARY),
"DiscardPadding": (b"\x75\xA2", EET.SIGNED),
"Slices": (b"\x8E", EET.MASTER),
"TimeSlice": (b"\xE8", EET.MASTER),
"LaceNumber": (b"\xCC", EET.UNSIGNED),
"FrameNumber": (b"\xCD", EET.UNSIGNED),
"BlockAdditionID": (b"\xCB", EET.UNSIGNED),
"Delay": (b"\xCE", EET.UNSIGNED),
"SliceDuration": (b"\xCF", EET.UNSIGNED),
"ReferenceFrame": (b"\xC8", EET.MASTER),
"ReferenceOffset": (b"\xC9", EET.UNSIGNED),
"ReferenceTimeCode": (b"\xCA", EET.UNSIGNED),
"ReferenceTimestamp": (b"\xCA", EET.UNSIGNED),
"EncryptedBlock": (b"\xAF", EET.BINARY),
"Tracks": (b"\x16\x54\xAE\x6B", EET.MASTER),
"TrackEntry": (b"\xAE", EET.MASTER),
"TrackNumber": (b"\xD7", EET.UNSIGNED),
"TrackUID": (b"\x73\xC5", EET.UNSIGNED),
"TrackType": (b"\x83", EET.UNSIGNED),
"FlagEnabled": (b"\xB9", EET.UNSIGNED),
"FlagDefault": (b"\x88", EET.UNSIGNED),
"FlagForced": (b"\x55\xAA", EET.UNSIGNED),
"FlagLacing": (b"\x9C", EET.UNSIGNED),
"MinCache": (b"\x6D\xE7", EET.UNSIGNED),
"MaxCache": (b"\x6D\xF8", EET.UNSIGNED),
"DefaultDuration": (b"\x23\xE3\x83", EET.UNSIGNED),
"DefaultDecodedFieldDuration": (b"\x23\x4E\x7A", EET.UNSIGNED),
"TrackTimecodeScale": (b"\x23\x31\x4F", EET.FLOAT),
"TrackTimestampScale": (b"\x23\x31\x4F", EET.FLOAT),
"TrackOffset": (b"\x53\x7F", EET.SIGNED),
"MaxBlockAdditionID": (b"\x55\xEE", EET.UNSIGNED),
"BlockAdditionMapping": (b"\x41\xE4", EET.MASTER),
"BlockAddIDValue": (b"\x41\xF0", EET.UNSIGNED),
"BlockAddIDName": (b"\x41\xA4", EET.TEXTA),
"BlockAddIDType": (b"\x41\xE7", EET.UNSIGNED),
"BlockAddIDExtraData": (b"\x41\xED", EET.BINARY),
"Name": (b"\x53\x6E", EET.TEXTU),
"Language": (b"\x22\xB5\x9C", EET.TEXTA),
"LanguageIETF": (b"\x22\xB5\x9D", EET.TEXTA),
"CodecID": (b"\x86", EET.TEXTA),
"CodecPrivate": (b"\x63\xA2", EET.BINARY),
"CodecName": (b"\x25\x86\x88", EET.TEXTU),
"AttachmentLink": (b"\x74\x46", EET.UNSIGNED),
"CodecSettings": (b"\x3A\x96\x97", EET.TEXTU),
"CodecInfoURL": (b"\x3B\x40\x40", EET.TEXTA),
"CodecDownloadURL": (b"\x26\xB2\x40", EET.TEXTA),
"CodecDecodeAll": (b"\xAA", EET.UNSIGNED),
"TrackOverlay": (b"\x6F\xAB", EET.UNSIGNED),
"CodecDelay": (b"\x56\xAA", EET.UNSIGNED),
"SeekPreRoll": (b"\x56\xBB", EET.UNSIGNED),
"TrackTranslate": (b"\x66\x24", EET.MASTER),
"TrackTranslateEditionUID": (b"\x66\xFC", EET.UNSIGNED),
"TrackTranslateCodec": (b"\x66\xBF", EET.UNSIGNED),
"TrackTranslateTrackID": (b"\x66\xA5", EET.BINARY),
"Video": (b"\xE0", EET.MASTER),
"FlagInterlaced": (b"\x9A", EET.UNSIGNED),
"FieldOrder": (b"\x9D", EET.UNSIGNED),
"StereoMode": (b"\x53\xB8", EET.UNSIGNED),
"AlphaMode": (b"\x53\xC0", EET.UNSIGNED),
"OldStereoMode": (b"\x53\xB9", EET.UNSIGNED),
"PixelWidth": (b"\xB0", EET.UNSIGNED),
"PixelHeight": (b"\xBA", EET.UNSIGNED),
"PixelCropBottom": (b"\x54\xAA", EET.UNSIGNED),
"PixelCropTop": (b"\x54\xBB", EET.UNSIGNED),
"PixelCropLeft": (b"\x54\xCC", EET.UNSIGNED),
"PixelCropRight": (b"\x54\xDD", EET.UNSIGNED),
"DisplayWidth": (b"\x54\xB0", EET.UNSIGNED),
"DisplayHeight": (b"\x54\xBA", EET.UNSIGNED),
"DisplayUnit": (b"\x54\xB2", EET.UNSIGNED),
"AspectRatioType": (b"\x54\xB3", EET.UNSIGNED),
"ColourSpace": (b"\x2E\xB5\x24", EET.BINARY),
"GammaValue": (b"\x2F\xB5\x23", EET.FLOAT),
"FrameRate": (b"\x23\x83\xE3", EET.FLOAT),
"Colour": (b"\x55\xB0", EET.MASTER),
"MatrixCoefficients": (b"\x55\xB1", EET.UNSIGNED),
"BitsPerChannel": (b"\x55\xB2", EET.UNSIGNED),
"ChromaSubsamplingHorz": (b"\x55\xB3", EET.UNSIGNED),
"ChromaSubsamplingVert": (b"\x55\xB4", EET.UNSIGNED),
"CbSubsamplingHorz": (b"\x55\xB5", EET.UNSIGNED),
"CbSubsamplingVert": (b"\x55\xB6", EET.UNSIGNED),
"ChromaSitingHorz": (b"\x55\xB7", EET.UNSIGNED),
"ChromaSitingVert": (b"\x55\xB8", EET.UNSIGNED),
"Range": (b"\x55\xB9", EET.UNSIGNED),
"TransferCharacteristics": (b"\x55\xBA", EET.UNSIGNED),
"Primaries": (b"\x55\xBB", EET.UNSIGNED),
"MaxCLL": (b"\x55\xBC", EET.UNSIGNED),
"MaxFALL": (b"\x55\xBD", EET.UNSIGNED),
"MasteringMetadata": (b"\x55\xD0", EET.MASTER),
"PrimaryRChromaticityX": (b"\x55\xD1", EET.FLOAT),
"PrimaryRChromaticityY": (b"\x55\xD2", EET.FLOAT),
"PrimaryGChromaticityX": (b"\x55\xD3", EET.FLOAT),
"PrimaryGChromaticityY": (b"\x55\xD4", EET.FLOAT),
"PrimaryBChromaticityX": (b"\x55\xD5", EET.FLOAT),
"PrimaryBChromaticityY": (b"\x55\xD6", EET.FLOAT),
"WhitePointChromaticityX": (b"\x55\xD7", EET.FLOAT),
"WhitePointChromaticityY": (b"\x55\xD8", EET.FLOAT),
"Projection": (b"\x76\x70", EET.MASTER),
"ProjectionType": (b"\x76\x71", EET.UNSIGNED),
"ProjectionPrivate": (b"\x76\x72", EET.BINARY),
"ProjectionPoseYaw": (b"\x76\x73", EET.FLOAT),
"ProjectionPosePitch": (b"\x76\x74", EET.FLOAT),
"ProjectionPoseRoll": (b"\x76\x75", EET.FLOAT),
"Audio": (b"\xE1", EET.MASTER),
"SamplingFrequency": (b"\xB5", EET.FLOAT),
"OutputSamplingFrequency": (b"\x78\xB5", EET.FLOAT),
"Channels": (b"\x9F", EET.UNSIGNED),
"ChannelPositions": (b"\x7D\x7B", EET.BINARY),
"BitDepth": (b"\x62\x64", EET.UNSIGNED),
"TrackOperation": (b"\xE2", EET.MASTER),
"TrackCombinePlanes": (b"\xE3", EET.MASTER),
"TrackPlane": (b"\xE4", EET.MASTER),
"TrackPlaneUID": (b"\xE5", EET.UNSIGNED),
"TrackPlaneType": (b"\xE6", EET.UNSIGNED),
"TrackJoinBlocks": (b"\xE9", EET.MASTER),
"TrackJoinUID": (b"\xED", EET.UNSIGNED),
"TrickTrackUID": (b"\xC0", EET.UNSIGNED),
"TrickTrackSegmentUID": (b"\xC1", EET.BINARY),
"TrickTrackFlag": (b"\xC6", EET.UNSIGNED),
"TrickMasterTrackUID": (b"\xC7", EET.UNSIGNED),
"TrickMasterTrackSegmentUID": (b"\xC4", EET.BINARY),
"ContentEncodings": (b"\x6D\x80", EET.MASTER),
"ContentEncoding": (b"\x62\x40", EET.MASTER),
"ContentEncodingOrder": (b"\x50\x31", EET.UNSIGNED),
"ContentEncodingScope": (b"\x50\x32", EET.UNSIGNED),
"ContentEncodingType": (b"\x50\x33", EET.UNSIGNED),
"ContentCompression": (b"\x50\x34", EET.MASTER),
"ContentCompAlgo": (b"\x42\x54", EET.UNSIGNED),
"ContentCompSettings": (b"\x42\x55", EET.BINARY),
"ContentEncryption": (b"\x50\x35", EET.MASTER),
"ContentEncAlgo": (b"\x47\xE1", EET.UNSIGNED),
"ContentEncKeyID": (b"\x47\xE2", EET.BINARY),
"ContentEncAESSettings": (b"\x47\xE7", EET.MASTER),
"AESSettingsCipherMode": (b"\x47\xE8", EET.UNSIGNED),
"ContentSignature": (b"\x47\xE3", EET.BINARY),
"ContentSigKeyID": (b"\x47\xE4", EET.BINARY),
"ContentSigAlgo": (b"\x47\xE5", EET.UNSIGNED),
"ContentSigHashAlgo": (b"\x47\xE6", EET.UNSIGNED),
"Cues": (b"\x1C\x53\xBB\x6B", EET.MASTER),
"CuePoint": (b"\xBB", EET.MASTER),
"CueTime": (b"\xB3", EET.UNSIGNED),
"CueTrackPositions": (b"\xB7", EET.MASTER),
"CueTrack": (b"\xF7", EET.UNSIGNED),
"CueClusterPosition": (b"\xF1", EET.UNSIGNED),
"CueRelativePosition": (b"\xF0", EET.UNSIGNED),
"CueDuration": (b"\xB2", EET.UNSIGNED),
"CueBlockNumber": (b"\x53\x78", EET.UNSIGNED),
"CueCodecState": (b"\xEA", EET.UNSIGNED),
"CueReference": (b"\xDB", EET.MASTER),
"CueRefTime": (b"\x96", EET.UNSIGNED),
"CueRefCluster": (b"\x97", EET.UNSIGNED),
"CueRefNumber": (b"\x53\x5F", EET.UNSIGNED),
"CueRefCodecState": (b"\xEB", EET.UNSIGNED),
"Attachments": (b"\x19\x41\xA4\x69", EET.MASTER),
"AttachedFile": (b"\x61\xA7", EET.MASTER),
"FileDescription": (b"\x46\x7E", EET.TEXTU),
"FileName": (b"\x46\x6E", EET.TEXTU),
"FileMimeType": (b"\x46\x60", EET.TEXTA),
"FileData": (b"\x46\x5C", EET.BINARY),
"FileUID": (b"\x46\xAE", EET.UNSIGNED),
"FileReferral": (b"\x46\x75", EET.BINARY),
"FileUsedStartTime": (b"\x46\x61", EET.UNSIGNED),
"FileUsedEndTime": (b"\x46\x62", EET.UNSIGNED),
"Chapters": (b"\x10\x43\xA7\x70", EET.MASTER),
"EditionEntry": (b"\x45\xB9", EET.MASTER),
"EditionUID": (b"\x45\xBC", EET.UNSIGNED),
"EditionFlagHidden": (b"\x45\xBD", EET.UNSIGNED),
"EditionFlagDefault": (b"\x45\xDB", EET.UNSIGNED),
"EditionFlagOrdered": (b"\x45\xDD", EET.UNSIGNED),
"ChapterAtom": (b"\xB6", EET.MASTER),
"ChapterUID": (b"\x73\xC4", EET.UNSIGNED),
"ChapterStringUID": (b"\x56\x54", EET.TEXTU),
"ChapterTimeStart": (b"\x91", EET.UNSIGNED),
"ChapterTimeEnd": (b"\x92", EET.UNSIGNED),
"ChapterFlagHidden": (b"\x98", EET.UNSIGNED),
"ChapterFlagEnabled": (b"\x45\x98", EET.UNSIGNED),
"ChapterSegmentUID": (b"\x6E\x67", EET.BINARY),
"ChapterSegmentEditionUID": (b"\x6E\xBC", EET.UNSIGNED),
"ChapterPhysicalEquiv": (b"\x63\xC3", EET.UNSIGNED),
"ChapterTrack": (b"\x8F", EET.MASTER),
"ChapterTrackNumber": (b"\x89", EET.UNSIGNED),
"ChapterTrackUID": (b"\x89", EET.UNSIGNED),
"ChapterDisplay": (b"\x80", EET.MASTER),
"ChapString": (b"\x85", EET.TEXTU),
"ChapLanguage": (b"\x43\x7C", EET.TEXTA),
"ChapLanguageIETF": (b"\x43\x7D", EET.TEXTA),
"ChapCountry": (b"\x43\x7E", EET.TEXTA),
"ChapProcess": (b"\x69\x44", EET.MASTER),
"ChapProcessCodecID": (b"\x69\x55", EET.UNSIGNED),
"ChapProcessPrivate": (b"\x45\x0D", EET.BINARY),
"ChapProcessCommand": (b"\x69\x11", EET.MASTER),
"ChapProcessTime": (b"\x69\x22", EET.UNSIGNED),
"ChapProcessData": (b"\x69\x33", EET.BINARY),
"Tags": (b"\x12\x54\xC3\x67", EET.MASTER),
"Tag": (b"\x73\x73", EET.MASTER),
"Targets": (b"\x63\xC0", EET.MASTER),
"TargetTypeValue": (b"\x68\xCA", EET.UNSIGNED),
"TargetType": (b"\x63\xCA", EET.TEXTA),
"TagTrackUID": (b"\x63\xC5", EET.UNSIGNED),
"TagEditionUID": (b"\x63\xC9", EET.UNSIGNED),
"TagChapterUID": (b"\x63\xC4", EET.UNSIGNED),
"TagAttachmentUID": (b"\x63\xC6", EET.UNSIGNED),
"SimpleTag": (b"\x67\xC8", EET.MASTER),
"TagName": (b"\x45\xA3", EET.TEXTU),
"TagLanguage": (b"\x44\x7A", EET.TEXTA),
"TagLanguageIETF": (b"\x44\x7B", EET.TEXTA),
"TagDefault": (b"\x44\x84", EET.UNSIGNED),
"TagString": (b"\x44\x87", EET.TEXTU),
"TagBinary": (b"\x44\x85", EET.BINARY),
"LuminanceMax": (b"\x55\xD9", EET.FLOAT),
"LuminanceMin": (b"\x55\xDA", EET.FLOAT),
}
def ebml_element(element_id, data, length=None):
if length==None:
length = len(data)
return big_endian_number(element_id) + ebml_encode_number(length) + data
class Xml2Mkv(handler.ContentHandler):
def __init__(self):
self.stack = []
self.bufstack = []
self.timecode_scale = 1000000
self.naive_duration_editing_checker_duration = None
self.last_block_duration = 0
self.header_removal_compression = {} # track number -> buffer
self.tracks_current_track = None
self.tracks_current_ContentCompAlgo = None
self.tracks_current_ContentCompSettings = None
pass
def naive_duration_editing_checker(self, duration):
if not self.naive_duration_editing_checker_duration:
self.naive_duration_editing_checker_duration = duration
else:
if duration != self.naive_duration_editing_checker_duration:
sys.stderr.write("Looks like you edited <duration>, but we are ignoring it\n")
sys.stderr.write("<duration> is meaningful in <block>s that are used in\n")
sys.stderr.write("\"nocluster\" mode (mkv2xml -C)\n")
def startElement(self, name, attrs):
self.curname = name
self.chacter_data=[]
if name == "mkv2xml":
pass
elif name == "Segment":
sys.stdout.write(b"\x18\x53\x80\x67"+b"\xFF")
sys.stdout.write(b"\xEC\x40\x80" + (b"\x00" * 128)) # for convenience of other mkv tools
pass;
elif name == "track" or \
name == "duration" or \
name == "timecode":
pass
elif name == "data":
self.frame_text_content = False
if "encoding" in attrs:
if attrs["encoding"] == "text":
self.frame_text_content = True
elif name == "discardable":
self.frame_discardable = True
elif name == "keyframe":
self.frame_keyframe = True
elif name == "invisible":
self.frame_invisible = True
else:
if name in element_types_names:
(id_, type_) = element_types_names[name]
self.curtype = type_
self.stack.append((name, attrs));
self.bufstack.append(b"")
if "encoding" in attrs:
if attrs["encoding"] == "text":
self.curtype = EET.TEXTA
if name == "SimpleBlock" or \
name == "Block" or \
name == "block":
self.frame_discardable = False
self.frame_invisible = False
self.frame_keyframe = False
self.frame_curbuffer = ""
self.frame_buffers = []
self.frame_duration = None
self.curtype = None # prevent usual binary processing
if name == "BlockGroup":
self.naive_duration_editing_checker_duration = None
def characters(self, content):
self.chacter_data.append(content);
def characters_old(self, content):
if self.curname == "data":
self.frame_curbuffer+=content
return
if not content.isspace():
buf=""
if self.curname == "track":
self.frame_track = int(content)
return;
elif self.curname == "timecode":
self.frame_timecode = float(content)
return;
elif self.curname == "duration":
self.frame_duration = float(content)
return;
elif self.curtype == EET.TEXTA:
buf = str(content).encode("ascii")
elif self.curtype == EET.TEXTU:
buf = str(content).encode("UTF-8")
elif self.curtype == EET.UNSIGNED:
buf = big_endian_number(int(content))
if self.curname == "TimecodeScale" or self.curname == "TimestampScale":
self.timecode_scale = int(content)
elif self.curname == "Timecode" or self.curname == "Timestamp":
self.last_cluster_timecode = int(content)
elif self.curname == "BlockDuration":
self.naive_duration_editing_checker(int(content))
elif self.curtype == EET.SIGNED:
buf = big_endian_number(int(content), True)
elif self.curtype == EET.BINARY:
content = content.replace("\n","").replace("\r","").replace(" ","");
buf = binascii.unhexlify(maybe_encode(content))
pass
elif self.curtype == EET.DATE:
d = float(content) # UNIX time
d-=978300000 # 2001-01-01T00:00:00,000000000
d*=1000000000.0;
buf = big_endian_number(int(d), True)
elif self.curtype == EET.FLOAT:
buf = pack(">d", float(content))
self.bufstack[-1]+=buf
def endElement(self, name):
content = "".join(self.chacter_data)
if content:
self.characters_old(content)
self.chacter_data=[]
if name == "track" or \
name == "timecode" or \
name == "discardable" or \
name == "keyframe" or \
name == "invisible" or \
name == "duration":
return
elif name == "data":
if self.frame_text_content:
self.frame_buffers.append(maybe_encode_utf8(str(self.frame_curbuffer)))
else:
text = self.frame_curbuffer.replace("\n", "").replace("\t", "").replace(" ", "")
self.frame_buffers.append(binascii.unhexlify(maybe_encode(text)))
self.frame_curbuffer=""
return
if name != "block":
if not name in element_types_names:
if not name == "mkv2xml":
sys.stderr.write("Unknown element %s\n"%name)
return
if name=="TrackEntry":
if self.tracks_current_ContentCompAlgo == 3:
self.header_removal_compression[self.tracks_current_track] = \
binascii.unhexlify(maybe_encode(self.tracks_current_ContentCompSettings))
self.tracks_current_ContentCompSettings = None
self.tracks_current_ContentCompAlgo = None
sys.stderr.write("Using header compression for track "+str(self.tracks_current_track)+"\n");
if name=="TrackNumber":
self.tracks_current_track = int(content)
if name=="ContentCompAlgo":
self.tracks_current_ContentCompAlgo = int(content)
if name=="ContentCompSettings":
self.tracks_current_ContentCompSettings = content
if name=="Segment":
return
(id_, type_) = (None, None)
if name != "block":
(id_, type_) = element_types_names[name];
if name == "SimpleBlock" or name == "Block" or name == "block":
absolute_timecode = int(self.frame_timecode * 1000000000 / self.timecode_scale)
relative_timecode = 0
if name != "block":
relative_timecode = absolute_timecode - self.last_cluster_timecode
if self.frame_duration:
scaled_duration = int(self.frame_duration * 1000000000 / self.timecode_scale)
self.naive_duration_editing_checker(scaled_duration)
if relative_timecode < -0x8000 or relative_timecode > 0x7FFF:
sys.stderr.write("Block timecode is too far from outer Cluster's timecode\n")
sys.stderr.write("Use no-cluster mode (mkv2xml -C) with <block> elements\n")
relative_timecode = 0;
if relative_timecode<0:
relative_timecode+=0x10000
flags = 0x00
if self.frame_keyframe: flags|=0x80
if self.frame_discardable: flags|=0x01
if self.frame_invisible: flags|=0x08
xiph_lace_lengths=[]
content = b""
header = None
if self.frame_track in self.header_removal_compression:
header = self.header_removal_compression[self.frame_track]
for i in self.frame_buffers:
if header is not None:
# apply header removal compression
if i[0:len(header)] != header:
sys.stderr.write("Unable to apply header compression here\n")
else:
i=i[len(header):]
content += i
xiph_lace_lengths.append(len(i))
xiph_lace=b""
xiph_lace_count = len(xiph_lace_lengths)-1
for i in range(0,xiph_lace_count):
l = xiph_lace_lengths[i]
while l>=255:
xiph_lace+=b"\xFF"
l-=255
xiph_lace+=chr(l)
frame = None
if len(xiph_lace_lengths) <= 1:
frame = ebml_encode_number(self.frame_track) + \
chr(relative_timecode>>8) + chr(relative_timecode&0xFF) + \
chr(flags) + \
content
else:
flags |= 0x02 # Xiph lacing
frame = ebml_encode_number(self.frame_track) + \
chr(relative_timecode>>8) + chr(relative_timecode&0xFF) + \
chr(flags) + \
chr(xiph_lace_count) + xiph_lace + \
content
if name == "block":
if not self.frame_duration:
cluster = ebml_element(0x1F43B675, b"" # Cluster
+ ebml_element(0xE7, big_endian_number(absolute_timecode)) # Timecode
+ ebml_element(0xA3, frame)) # SimpleBlock
else:
scaled_duration = int(self.frame_duration * 1000000000 / self.timecode_scale)
cluster = ebml_element(0x1F43B675, b"" # Cluster
+ ebml_element(0xE7, big_endian_number(absolute_timecode)) # Timecode
+ ebml_element(0xA0, b"" # BlockGroup
+ ebml_element(0x9B, ben(scaled_duration)) # BlockDuration
+ ebml_element(0xA1, frame))) # Block
sys.stdout.write(cluster)
return
else:
self.bufstack[-1] = frame
if not len(self.stack):
return
(_, attrs) = self.stack.pop();
buf = self.bufstack.pop();
if name == "WritingApp" or name == "MuxingApp":
if buf.find(b"xml2mkv") == -1:
buf+=b"; xml2mkv"
if len(self.bufstack):
self.bufstack[-1] += id_ + ebml_encode_number(len(buf)) + buf;
else:
sys.stdout.write(id_)
sys.stdout.write(ebml_encode_number(len(buf)))
sys.stdout.write(buf)
pass
if sys.version >= '3':
sys.stdout = sys.stdout.detach()
parser = make_parser()
parser.setContentHandler(Xml2Mkv())
parser.parse(sys.stdin)