Note: Also posted this in the After Effects forum. Hope this is okay - I don't post a lot and I don't know the rules here. Mods, feel free to throw this one out if needed.
I'm having a lot of difficulty keying hair from a recent shoot. It was shot and lit professionally (Prores 4:2:2) and visually doesn't look like I should have any issues. I've tried Ultra Key in Premiere, Keylight in AE, and even tried a trial of Primatte, and no matter what I do, I end up with noisy buzzing around this guy's hair. I've watched and read everything I can find and I didn't encounter anyone with a similar issue - most tutorials were very simple, saying they pretty much click a few different areas of green, find the best one, and adjust clip black/white a little and it's done. I've spent hours sampling different areas of the green screen and adjusting every setting available, and am making very little progress.
One thing to note - this footage was shot with S-Log2. However, I put the correct LUT on top and made a new composition for the key. Would this effect anything somehow?
Any and all advice is greatly appreciated. I've attached a picture of the problem area for reference - although the issue isn't as noticeable until you play the video. The hair just looks staticky, flickery, and unusable.
I bet you're expecting to get a good key simply. Well, welcome to reality.
That guy's wispy hair is going to give you fits.
This isn't a job for PP, it's a job for AE. It will take animated masks to create at least two layers -- one for just the hair and one for the rest of the guy. Key them separately. You may even have to precompose your keyed layers and use the precomp as a track matte for the un-keyed footage.
Then you can use spill suppression on that God-awful green spill.
If the lighting guy had any real experience in effects work he would have known to use a backlight with a bit of magenta gel -- the precise opposite color of green -- to help separate the subject from the background. It would have neutralized a lot of the green in the hair.
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA