CyberSimian

Fixed, I think. Certainly the vintage MP2 installer that I was using no longer installs the LAV filters. I can only assume that these were never part of the install package itself, but rather...

I think that codecs need to be registered with Windows, in order for MP2 to be able to use them. If installing LAV did not register the codecs, you need to do this manually. Try typing How to...

My guess (and that is all that it is) would be that either: The audio codec used by that VOB file is not installed on your system, or The codec is installed but it has not been selected for use...