(1) RawSource is meant for image STREAMS, not for single images, although it works on 1-image-streams
(2) the header-format was discussed in the other thread (well-hidden, it seems). Look here
http://forum.doom9.org/showthread.ph...865#post635865 , there's an attachement.
(3) What exactly do you mean with 411? The same as YV12 but stored as interleaved? Are there some examples around? As long as it can mapped to an AviSynth format it sould be not much work.