RotoBrush may be the only thing that can save this. Traditional keying will not work because of the spill- the values are way to close to eachother. Anyway, what gave you the idea that you can actually key of that background?
I assume keying such footage wasn't in your first plan.
Even the backdrop is pleated. Anyway..
You may also have to dublicate your layer per filter such as: extract color key (the best part of it is that it's not an inteligent one ) color range
Try to pull a matte for the hair using the extract filter.
The same filter under different values will keep some of the green shirt also.
color range for the shirt
for skin (hands) try to add numerous color key filter, but don't push them too far. in many cases color key will produce a decent matte but you will have to improve it using a choker or something similar.
Later on merge/precompose your layers and apply a composite choker if needed.
Thanks guys, for the suggestions, I will give them a try.
Usually this footage is pretty easy to key, it was shot using the Chromatte keying system. Believe it or not, here is a shot of just the screen from the same shoot:
The problem is that the talent got too close to the camera, allowing both the blue light to spill on himself and robbing the backdrop from reflecting it back to the lens. C'est la vie I suppose. But this was a problem for about 50 seconds of the 10 minutes of footage.
I bet you cab get a decent result with his hair and shirt (using key light, calculations, levels, etc). The skin, headphones, other bits and pieces will require rotobrush or mochaAE. If it were me I would think of this as a full roto job, and then be grateful that some of the stuff can be done procedurally. Then you are in a glass half-full situation!