Sony FS5 border artifacts 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: 

Original footage... 

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:
In regards to the green and black mixing, 4:2:2 means pixels are merged and this will always happen, this is why movies shoot in 4:4:4 because then there is no merging of colors.  But I have no idea why you are getting a white halo around a black object with a black background.