As far as I remember TmpgEnc allways reports a video stream as being interlaced, so the autodetec doesn't seem to be very good. Whether you encode as non- or interlaced probably doesn't matter as long as your source isn't truly interlaced. I can't remember any DVD movie (hollywood) to be interlaced. It's easy enough to see from f i the preview in TmpgEnc. And if you cant see it don't bother with the interlacing, since it takes longer and probably uses more bits. DV on the other hand is most often interlaced and will be totally screwed if you don't encode it as such cheers