Ok I have a Macbook and a green screen. I need some kind of software that will help me use chroma key during a live webcast. Like the news people they are live and they use a green screen for the weather. I need to key it out with a background. Is there any kind of application that I can run that keys it out and lets me use my built-in camera during the live webcast and the program. I was on google looking all over for something that could do this. I am going to need to use it for a school project that will be assigned. Please Please Please help me. You guys always have some kind of answer, and if i can't find it on google, I know i can find some kind of answer on here. Most detail and help appreciated.