MKV playing as music file?

I have a problem with some mkv movie files playing as if it’s a music file, then I can’t get it to stop. The screen is black and the counter stays on 0:00. I have to reset to make it stop. I am so tired of all of these problems with the Gen 1 WDTV.

Then stop enabling header compression when you encode your files.

The WDTV HD will never be able to play compressed-header Matroska files.

Header Compression is not enabled

Please post the text output of MEDIAINFO here.