I'm using TMPGEnc to add music to and mpeg movie, the first few times that I did this it work great, but now after TMPGEnc is almost at 80% of completing the file it stops saving frames but it does finish the file, if I play that file the video will freeze at 80% but the audio still play til the end.

This happends even if its a 3 min clip or a 20 min one.

Is there another better program that does this?

Please help, thanks