On Sun, 8 Jun 2008 20:05:33 -0500 (CDT) "R.L. Horn" <lists at eastcheap.org> wrote: > Sticking to (at least) mod8 (mod16 with H.264) is a good idea This is bad advice. With just about every codec since the '80s, you waste a serious amount of bits if you don't use mod 16 dimentions, (and mod32 with interlaced video).