ok .. some information
MKV and .TS are containers.. They contain audio/video streams.. Not nessicasry the same type of stream every time.
.TS will play will HDpump
WMV-HD - play
for mkv that use x.264 encoding you have two options. Use a converter (Transcode 360/Vlc 360) or convert to WMV.
To convert you will need to install a frameserver, so install FFMEG, this allows programs that normally cannot load x.264 etc to load and access them via the frameserver.
To conver to WMV i use the MS media encoder, or some software called River. This works. It converts fine. However the sound seems to drop from 5.1 to 2.
What we need to be able to do (and i cannt work out how) is to extract the audio stream in 5.1 (mkvextract) and then convert the video 'river' or MME, then some how mutex the sound in 5.1 back into the wmv container.