[lca77]

IMO viDrop .55 is coming with a buggy MEncoder.exe that should be better replaced by an older version. At first use i've missed the mp2-sound in videos - after I've exchanged Mencoder.exe in viDops installationdir, this problem would'nt be seen anymore.

I don't know much about dvd-rippings with or without viDrop; the css encryption maybe running viDrop into some troubles - like you mentioned. Try the ripping again with a DVD without encryption and ask lockster himself for a helping hand.