Copy to iPod format

Ok, so I’ve been backing up some of my DVD’s to iPod. Most of them are working just fine but there are some that the sound doesn’t match up with the picture. Any thoughts? Thanks.

What settings and which iPod profile are you using? Same settings for all DVDs?

just the default settings… I haven’t touched anything because I haven’t had a complaint with anything. And yes, they are the same for every DVD.