For those on OS X, Visual Hub will take almost anything even things QTP won't. Including commercial DVD disks if you use a liitle utility called FairMount which will magically unmount and quickly (in less than 10s) remount any mounted encrypted DVD but in unencrypted form. So you can convert any DVD to n800 compatible format w/o any intermediate transcoding. See my other post on converting in H264 for n8x0 as opposed to MPEG4 which is what Nokia converter does. Highly recommended imho.

My only problem with V. Hub it its inability to do partial converts - from point a to b say. That unfortunately sometimes necessitates transcoding.