dxv is multiplatform and works like other quicktime codecs this way so no problem with pc/mac!
don't know about the color specifications, think it's always 16m+
alpha channel can be set in the extra options of the codec (ignore or preserve alpha channel), with alpha channel the filesize seems to get larger!
the rest can't be configured in dxv i think.
don't know if it makes sense to use "only" 16million colors or less
my request on this point (which is also not used generally in video i think):
i have some black/white clips and it would be nice to reduce the color specs (i think a grayscaled video should contain much less information)!
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