I've been all over this forum & others trying to find a solution, without having to create a post, but nothing is working so far..
I just got PS3MS after a suggestion from my brother, who's been running it for quite awhile with no issues. I downloaded Season 4 of Dexter, and I'm having the same issues as some others here with their movies - no sound. The video works great, but no sound at all. I tried muxing with both the MKVmerge 3.3.0 and 3.4.0, and neither worked. Again, as indicated, the episode's work properly when played in VLC.
I'm not sure if the part of the problem is this would be a very new MKV - the DVD's are not set to be released until August 17.
The problem seems to be a "bug" in MEncoder. I just replaced MEncoder.exe and it's associated folders with a newer version and audio is working fine now. Not sure yet if this will create new problems but everything is working fine so far.
I found MEncoder here: http://oss.netfarm.it/mplayer-win32.php
This seems to have worked. Mostly.
1. The very first episode, has sound for the "Showtime" and "Showcase" logos/ graphics, but the sound seems to slow down considerably & then stops. All the other episodes appear to be working fine.
2. The sound only plays from my TV, not my receiver/ surround sound. I'll have to do more digging into this & my configurations later, when I have more time.