invalid audio and video files

[volam]

I used 1clickdvd to copy a dvd9 ntsc video music into a file (7gb). Sofar only nero showtime and virtualdubmod can play the vob files properly (vlc player can only play the video, can't hear any audio). I used ac3fix to check/repair the audio file, it said "in ok, out ok". These vob files were demuxed into m2v and ac3 files, but when I tried to use the editing softwares such as mpg2cut2, muxman, imagompgmuxer, DaudioK I got the message "invalid video file" and "invalid audio file". Does anyone know this problem? My goal is to cut out certain video clips from this dvd/vob files but I still can't do it. any idea will be appreciated.

[Baldrick]

I would instead use dvdshrink( in the reauthoring mode) to cut out clips directly from the dvd. (click on dvd shrink for guides).