A slightly weird suggestion. Try keying the same keys in FCP X 10.0.3 or higher.
I recently did a keying job in FCP X.
I first tried the key in AE. AE’s built-in keyers are not very good with Canon and other such material. Then I had an asst try in Resolve. Admittedly he is no expert so the keys weren’t that great in Resolve either. And I do have access to many Nuke/Shake artists.
But before sending off the footage, I tried ‘one last time’ with FCP X. And was amazed. Clean keys with the minimum of effort. And surprisingly powerful controls. This is not some iMovie keyer. This is stuff they’ve gleaned from Shake, Primatte, Final Touch and other such legacy apps.
Also, it may help to convert the footage to ProRes4444 so at least the chroma color space is cleaner.
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Neil Sadwelkar
neilsadwelkar.blogspot.com
twitter: fcpguru
FCP Editor, Edit systems consultant
Mumbai India