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oh, I have written this expamle script without testing...
now I am using
a=whatever
b=whatever.levels(0,1,255,255,0)
subtract(a,b)
and, no, I don't want these terrible color-effects, I just want a clean addition of two clip, "mul" wasn't suitable
btw.: can you reproduce this strange thing:
try to resize a clip with pointresize to exactly its third horizontal size. I am always getting a black or green picture..
example:
video has 768,576 pixels
pointresize(256,576) ---> returns garbage
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