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Gavino · 25th March 2011, 15:31

Your formula assumes PC levels (0-255) rather than the normal 'TV' levels (16-235). Although the formula could be rewritten, the simplest solution is to use ColorYUV(levels="TV->PC") on both input clips before calling mt_lutxy, and ColorYUV(levels="PC->TV") after. But I think all your 256's probably should be 255's.

I've never heard of mt_infix - do you mean mt_polish?
The call could be written as:

Code:

mt_lutxy(a,b,mt_polish("255 - (255-x)*(255-y)/255"),Y=3, U=2, V=2)

25th March 2011, 15:31	#2 \| Link
Gavino Avisynth language lover Join Date: Dec 2007 Location: Spain Posts: 3,431	Your formula assumes PC levels (0-255) rather than the normal 'TV' levels (16-235). Although the formula could be rewritten, the simplest solution is to use ColorYUV(levels="TV->PC") on both input clips before calling mt_lutxy, and ColorYUV(levels="PC->TV") after. But I think all your 256's probably should be 255's. I've never heard of mt_infix - do you mean mt_polish? The call could be written as: Code: mt_lutxy(a,b,mt_polish("255 - (255-x)(255-y)/255"),Y=3, U=2, V=2) __________________ GScript and GRunT - complex Avisynth scripting made easier Last edited by Gavino; 25th March 2011 at 15:34.*