Hey guys,
at the moment I am doing my first greenscreen project with an iPad (and a TV). But I have a few problems with the turbulent footage.
In the first picture you can see the tracked path on the iPad with Mocha. Everything moves really fine in the final result (see second picture). But there is a lot green left in the person's face and around the screen that I need to get rid of.
So my first question: How do I get rid of those green diffuse edges around the screen and the green in the face?
I tried several keying effects including keylight etc. – nothing worked. Either the green from the plants around dissappeared or it looked really edged. Is the only possibilty using moving masks? Or is there a more precise method?
Second question: How can I isolate the hand from the greenscreen while interacting "over" the iPad? I have a few sequences where the hand of the person is interacting on the (green)screen. So I need to get the screen behind the hand although everything's moving :-/ Is that possible?
Thanks a lot for your support! 
