On Mon, 9 Jun 2008, Jorge Peixoto de Morais Neto wrote: > There they say "for interlaced video, your y-offset and height for > cropping must be multiples of 4. " >> From what I understand, Whoops, you're right. You can use even multiples for 4:2:2 or 4:4:4 interlaced frames, but 4:2:0 needs to be a multiple of four (two chroma lines).