I've got a problem with trying to key the green color with some footage I shot with a Sony FS5. The main object in the frame has some kind of white/light grey border around it which makes it very hard to separate it from the green screen background. Here are some examples:
Trying to key with Keylight in After effects...
I shot in 1920x1080, 50 fps 4.2.2 with the internal AVC codec. I think it could be caused by the in-camera sharpening settings, I tried to change the settings but I didn't notice any change.
Each channel isolated (RGB) not keyed: