From the course: After Effects Compositing: 4 Color Keying

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Avoid compression: The enemy of mattes

Avoid compression: The enemy of mattes - After Effects Tutorial

From the course: After Effects Compositing: 4 Color Keying

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Avoid compression: The enemy of mattes

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- When recording a green screen scene, it's the recording format more than the camera or the lens that matters although those do still matter a lot. It's vital that the image be recorded with as little noise and compression as possible, and that rules out a lot of the most popular camera systems. This appears to the naked eye to be the same shot looping over and over, and it is, with one subtle difference. There are two versions of the same shot, which appear the same to your naked eye, but in fact one of them has no JPEG compression on it, it's originally from the Blackmagic camera, and the other one is 4:2:2 compressed to H.264, similar to what you would get from your typical Canon or Nikon DSLR, so the lens optics are awesome in both cases, there's lots of nice hair detail, and you really only notice that there's a problem when you go to key it. 4:2:2 compression refers to the ratio between luminance and chrominance. With a 4444 image such as this one, there's the same amount of…

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