Yep that sounds somewhat similar to what im experiencing.
What I have found today is that if I try to play one of the offending files in graphstudio (ive narrowed it down to files with the default sound file being DTS-HD) it wont play initially but fdshow appears in my toolbar, if I then try to play it again it plays sucessfully. Its almost as if fdshow takes a little too long to load and because the filter hasnt got an audio decoder it stops playback.
I read some where on this forum (been reading multiple threads the last days...) that haali splitter has problems with DTS-HD and Dolby True-HD, which might explain the problem with mkv files.
I played a blu-ray disc today which had Dolby True HD audiotrack and pcm 5.1, directly in moving pictures 1.0.4
(my first blu-ray played in MP )
All went well...
I am now trying to rip to a m2ts file, then we will see.
Hoborg, can you confirm any of this??
Cheers,
Jacob