I'm using a slightly older MeGUI (dont have any installed currently), but it always used to ask if it should add "ConvertToYV12" at end of script when not already YV12
(maybe other planar YUV worked, not sure).
Have no idea why RGB32 should encode faster than YV12, seems a bit crazy.
Maybe someone else has an idea what it does, why it is faster when RGB32.
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