DVD2AVI gives me black borders from mpeg2

Probably no error, the black borders are most likely present in the MPEG stream.

Thanks for your answer. Then i watch the mpeg2-orginal file with Mediaplayer, there are no borders, but then i watch the converted avi file in mediaplayer, there are borders. (Is it possible, that mpeg2 stores some kind of invisible borders, maybe metadata, that causes this prob?) I still belive, that i make an stupid error during conversion (i had this prob will all converted mpeg2 files)

Could you open the AVI in VirtualDub instead and have a look there. Mediaplayer can sometimes add blackborders when the window isn't exactly the same size as the clip. If there isn't black borders in VD the I suggest a new player, like Zoomplayer or BSplayer