I recently shot some footage of some models against a green screen using the Canon 7D in full 1920 x 1080 in h264 and converted the footage to proRes 422. FYI- the footage before I key is slightly noisy(poss. my ISO was too high), and I am using keylight for all of my keying. My problem is that when I am done with all my keying- my models have a very noticeable and distracting shimmering edge.
Here is what I have tried so far with no luck: the three-pass method where I created a background, core and edge layer; super-tight junk mattes; light wraps; converting the footage to YUV-blurring some green and blue, then converting back to RGB.
These have helped to reduce the problem, but have yet to solve it completely. I have read every forum post I can find on this problem and none have yet to do the trick.
Any ideas let me know.
It sounds as if you've done pretty much everything you can do with keylight. You could try the Primatte keyer in Motion, which I assume you have. If Keylight fails on this footage, and Primatte fails on this footage, then rotoscoping is your final option.
Oh, wait -- you could also re-shoot. Because as you yourself wrote, "the footage before I key is slightly noisy"... and as we all know, it's tough enough to key using properly-exposed footage, to say nothing of poorly-exposed footage.
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