Re: [GEM-dev] pix_chroma_key not acting as I expect?

On Tue, 25 Apr 2006, B. Bogart wrote:

I still could not get pix_chroma_key to key on "value 16,16,16" remember our green is 0,240,0 not 0,255,0. (which I guess is YUV 0,0,0)? what should the YUV range be like for this video?

Here, YUV 0,0,0 is RGB -179,135,-227, a very out-of-range colour that gets clipped as RGB 0,135,0.

The RGB 0,255,0 gets converted to YUV 149,43,19 and RGB 0,240,0 to YUV 140,48,26.

I am using the other type of YUV, but there's only a 13% difference between the two types of YUV, soooo...

_ _ __ ___ _____ ________ _____________ _____________________ ... | Mathieu Bouchard - tél:+1.514.383.3801 - http://artengine.ca/matju | Freelance Digital Arts Engineer, Montréal QC Canada