Graphedit only lets me rip the audio from the first Vob of the movie, why?
The audio headder is only kept in the first Vob file of the movie. If you choose to encode the audio using Graphedit you must do all the Vobs together using the I-Media Multisource filter as explained in my guide. The only alternative is to extract the AC3 file from the Vob with VStrip or Vobsnoopy. Then you would be able to merge them with FileMerger and encode them any way you like.