This is a loopback device that can act as a webcam for any program that can access a webcam. Essentially it takes in an input and that same input is its output for a program like Skype or Windows messenger. This essentially means that i can modify the input from a "real" camera with an overlay and transmit that to the v4l2loopback device which then Skype uses.
If i have time after the first prototype, i will try to integrate this with my prototype and possible show a live demonstration.
Links
http://code.google.com/p/v4l2loopback/
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