For the long time I didn't have any problems with mkv files until now.
I have two movies 1080p which are crashing. Probably because of large bitrate.
There are some scenes that WD can't play smooth .
One of the movie info :
Complete name : Underworld.Rise.of.the.Lycans.2009.BluRay.1080p.DTS.x264.dxva-BTT.mkv
Format : Matroska
File size : 10.0 GiB
Duration : 1h 32mn
Overall bit rate : 15.5 Mbps
Writing application : mkvmerge v2.4.0 ('Fumbling Towards Ecstasy')
Writing library : libebml v0.7.7 + libmatroska v0.8.1
Video #1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Muxing mode : Container profile=Unknown@4.1
Codec ID : V_MPEG4/ISO/AVC
Duration : 1h 32mn
Bit rate : 13.3 Mbps
Width : 1 920 pixels
Height : 800 pixels
Display aspect ratio : 2.400
Frame rate : 23.976 fps
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.362
Writing library : x264 core 67 r1137M 1fda882
Audio #2
Format : DTS
Format/Info : Digital Theater Systems
Codec ID : A_DTS
Duration : 1h 32mn
Bit rate mode : Constant
Bit rate : 1 536 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Surround: L R, LFE
Sampling rate : 48.0 KHz
Resolution : 24 bits
Title : DTS 5.1
Language : English
Text #3
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Language : English