Quote:
Originally Posted by Mike8519
Typically it is just a secondary monitor running the program and most of the screen is "keyed" meaning it is a particular color which is is then made transparent by the AV equipment.
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This is usually done using a video effects switcher. The proccess is called chromakeying. A particular color is set as the key, and the hardware replaces that color with the input of a second video channel.
Newtek's Tricaster has this ability.
