Hi,
We need to enable Color/Chroma keying for a Video capture driver at work.
We are however not sure what Color/Chroma keying will buy us. Can somebody
point me to resources/websites, anything which talks about Color keying,
the mechanics behind it and its uses? As always would really appreciate any
help.
Thanks in advance,
Sheela.
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>We need to enable Color/Chroma keying for a Video capture driver at work.
We are however not sure what Color/Chroma keying will buy us. Can somebody
point me to resources/websites, anything which talks about Color keying,
the mechanics behind it and its uses? As always would really appreciate any
help.
I can’t offhand think of any websites, but my might check the documentation
of a capture device like from Brooktree. Also the DIrectX docs might talk
about it as applied to overlay surfaces.
The issue basically is if your viewing video in a window, the window may
not be on top, so you have a non-rectangular clipping region. If you
capture the video into a an overlay DirectX surface, and the app tells the
video card to use color keying to display the pixles from the overlay,
video only will be display where the main surface has the keying color.
This accomplishes pixel by pixel clipping of an arbitrary region for the
video window, even of it’s not on top (the overlay surface will always be
on top of all other windows).
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