Magic Music Visuals

Hi, i can not find a screen or desktop capture.
I would like to mix a karaoke shreen with Video capture of the " Artist "
Or any running program screen of the same Macbook pro .
Is is possible ?
Thank You for Your time.

Your best option would be if your karaoke software could stream to syphon but I am guessing it doesn't.

I used this once, but found it not practical to need the software to be visible: http://v002.info/plugins/v002-screen-capture/
Just found this. Haven't tried it, but maybe it helps: http://techlife.sg/ScreenCaptureSyphon/

Cheers