Tools for keying out Green Screen HELP?

Question

I have used the Chroma Keyer with the eyedropper tool and also the 4 point garbage matte, but I still get flecks of greens popping up around the edge of the piano. How can I fix this, as it is obvious they are there and moving when I play the clip with the background shot behind it.
Also, what settings would you recommended for blending the piano in with the rest of the forest?
Any help appreciated, thanks
(No background:) http://www.flickr.com/photos/35672265@N06/5153559019/
(With background:) http://www.flickr.com/photos/35672265@N06/5153568229/

Answer 1

Well, the obvious thing is that the piano is far too dark to be in that forest.
The forest shot seems to be a fairly bright overcast day.
The piano should be lit accordingly, in other words a softbox
or bounce lighting coming from vaguely overhead.
You can add something between the lights and the piano to cast a shadow
that looks like a tree limb. If the trees move, the shadow should move.
The greenscreen should be located well behind the piano and lit very evenly.
Shadows on the greenscreen cast by the piano can really mess things up.
Adjusting Softening can sometimes help with sharp flickering edges.
Depending on your camera's video format (colorspace), you will probably
get better results insert a Color Smoothing Filter before your Keyer.
If you want to learn more, read this:
http://books.google.com/books?id=2lMK4BCRvt8C&pg=PT292&lpg=PT292&dq=fcechromablur&source=bl&ots=-mqf7uQeNz&sig=YO-bJ9SzYYz1a3QAZXyeIuZ8Vk&hl=en&ei=60TaTKakF5TksQO9m-XkBw&sa=X&oi=bookresult&ct=result&resnum=7&ved=0CCoQ6AEwBg#v=onepage&q&f=false