![]() The main difference is that you have to replace the green screen as you’re filming, rather than during editing. ![]() You film something or someone in front of a colored background - the green screen - then you replace everything that’s in the color of the screen with other footage, images, charts, presentations, or whatever visuals you want.Ĭhroma keying a live stream works almost the same way. You probably already have an idea of how to use a green screen, at least in principle. ![]() It doesn’t have to be green at all, though, and the technical term for it is “chroma keying.” ![]() What does the weather forecast on your local TV station have in common with a $300 million blockbuster? They both use the same visual effect: a green screen.
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