if Unknown1 & 0x2 is true then there are two bytes after the color byte and before the line encoding which says how to move the previous frame horizontally before mixing it with the new frame.
+
if those are set to F7 00 then the last picture is shifted 8 pixels left( 247 - 256 = -8)
+
and i think that if Unknown1 & 0x1 is true then there are two more bytes but these are for the vertical position.--[[User:Pbsds|pbsds]] 17:57, 26 May 2010 (UTC)