I need to convert some DVD files (.vob) to mpg2 files so I can do some editting. I'm using an editting program that will not accept .vob. I've ripped the DVD using DVD Decryptor, cut out the piece I needed using Virtual Dub MPG2. But now I can not get them saved as mpg. I tried using Chopper XP, and was succesful at getting mpg, but I'm getting no audio. What am I doing wrong?