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  1. x264vfw always compresses at 24 bit color depth. There is a choise "keep input color space". But what about color depth? how to keep it at source bit depth? decrease or increase? or what is the command for that? and also i tried on MeGui's x264 but it always keeps at 12 bit. So important question is: how to compress video at source bit depth in x264vfw?
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  2. Originally Posted by chazz spacey View Post
    x264vfw always compresses at 24 bit color depth. There is a choise "keep input color space". But what about color depth? how to keep it at source bit depth? decrease or increase? or what is the command for that? and also i tried on MeGui's x264 but it always keeps at 12 bit. So important question is: how to compress video at source bit depth in x264vfw?
    x264vfw is only compiled with 8bit support. So there is no choice for source bit depth. Note 8bit means 8 bit per channel component. ie. 8bits for each of Y, U, V , or 8+8+8=24

    megui uses x264 which can only be compiled with 8 or 10 bit at compile time. Not 12. (8 and 10 are the only options for x264)

    The "12" is a different style of notation indicating 8bit, subsampled 4:2:0, but really still means 8bits per channel . (Since U, V are 1/2 in each dimension, it's 1/4 of 8, or 2. So 8+2+2=12. By this logic, 8bit 4:4:4 would be 24)
    Last edited by poisondeathray; 13th Oct 2014 at 10:42.
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  3. 8 and 10 are the only options for x264
    iirc there should also be a 9bit variant, unless they removed it, but my guess is (aside from me) nobody really cared about the 9bit version
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