virtualDub has

I just noticed that virtualDub has vob support (mpeg2) since a couple of years now: http://home.comcast.net/~fcchandler/Plugins/MPEG2/index.html

For AC3 i try http://www.free-codecs.com/AC-3_ACM_Decompressor_download.htm

Works nicely as usual with VirtualDub!