V for Vendetta (de), Audio Problems, New copy protection?

I used AnyDVD (latest) and Nero Recode to create a MP4 version of the main movie of “V for Vendetta” (The German version).

This worked very well, but after I looked at the result, both audio tracks has a lot of ugly very loud noises. (Like jitter problems when ripping a CD analog)

Is this a new kind of copy protection, or went something wrong while ripping/encoding the DVD?