I have a bunch of MKV files, and while they all work to my Sony s370 Blu-Ray player (although, transcoding has to be ON for it to find the files =( ) - 2 of them won't play audio at all. Video plays fine, but blank audio. I went through all the others encoding settings and trying to see what made these 2 so special -- the ONLY thing they both had that the others did not was a fairly low audio bitrate (384) while the others were around 600+. The audio plays perfectly fine when watching on PC and isn't that low at all, so it's not a file issue really.

Not quite sure where to really take it from there, i tried adjusting a few settings on the TV, and nadda.

Also, I'm sure it's been mentioned- but just in case, I also had an issue where videos would stop 30 seconds in, and the issue was -- low disk space. I moved the transcode folder to another drive and the issue is long gone.