Here is updated log after correct header removal
General
UniqueID/String : 175734302873992410135059942499764980838 (0x84353213E5A055679FBA727D276CCC66)
CompleteName : C:\Panasonic samples\HD\Panasonic.track_2.mkv
Format : Matroska
Format_Version : Version 2
FileSize/String : 125 MiB
Duration/String : 3mn 20s
OverallBitRate_Mode/String : Variable
OverallBitRate/String : 5 257 Kbps
Movie : Panasonic.HD.Demo-Flowers.720p.X264
Encoded_Date : UTC 2012-07-14 10:50:49
Encoded_Application : mkvmerge v5.7.0 ('The Whirlwind') built on Jul 8 2012 20:08:51
Encoded_Library/String : libebml v1.2.3 + libmatroska v1.3.0
Video
ID/String : 1
Format : AVC
Format/Info : Advanced Video Codec
Format_Profile :
[email protected]
Format_Settings_CABAC/String : Yes
Format_Settings_RefFrames/String : 8 frames
CodecID : V_MPEG4/ISO/AVC
Duration/String : 3mn 20s
BitRate_Mode/String : Variable
BitRate_Nominal/String : 5 120 Kbps
BitRate_Maximum/String : 40.0 Mbps
Width/String : 1 280 pixels
Height/String : 720 pixels
DisplayAspectRatio/String : 16:9
FrameRate/String : 29.970 fps
ColorSpace : YUV
ChromaSubsampling : 4:2:0
BitDepth/String : 8 bits
ScanType/String : Progressive
Bits-(Pixel*Frame) : 0.185
Encoded_Library/String : x264 core 54 svn-593M
Encoded_Library_Settings : cabac=1 / ref=5 / deblock=1:-2:-2 / analyse=0x3:0x133 / me=hex / subme=6 / brdo=1 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / chroma_qp_offset=0 / slices=2 / nr=0 / decimate=1 / mbaff=0 / bframes=3 / b_pyramid=1 / b_adapt=1 / b_bias=0 / direct=3 / wpredb=1 / bime=1 / keyint=240 / keyint_min=24 / scenecut=40 / rc=2pass / bitrate=5120 / ratetol=1.0 / rceq='blurCplx^(1-qComp)' / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / pb_ratio=1.3
Default/String : Yes
Forced/String : No
Audio
ID/String : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format_Profile : HE-AAC / LC
CodecID : A_AAC
Duration/String : 3mn 20s
Channel(s)/String : 2 channels
ChannelPositions : Front: L R
SamplingRate/String : 96.0 KHz / 48.0 KHz
Compression_Mode/String : Lossy
Language/String : English
Default/String : Yes
Forced/String : No