Is it common for chroma keying to Make video noisey?
https://youtu.be/H71OPUzGFskFilmmaking / Directing : I was working on green screen for the first time by Adam Cabrera
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This could also be a good question for the Post Production Lounge - https://www.stage32.com/lounge/post_production
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I suspect closeness to the green screen and lighting are the issues. 4:2:0 is pretty much the norm in consumer grade DSLRs although I've seen some 4:2:2 subsampling in a few newer full frame DSLRs. I think that he could go back into post color grading and bring up the background - that might generate a bit more noise, but it's a soft focus and it may be an enhancement.
With everything being shot digitally yes, you have to go to digital green or whatever the DP has in mind for his thought process....Film still is and will have the best saturation for color! Even through DI....
Damian Lloyd Yeah, standing too close the the green would be the first step in troubleshooting, and so I'd also say that's likely the culprit. This may be a great way to start checking your camera settings, Adam Cabrera : https://nofilmschool.com/tips-help-you-green-screen-champion
Actually, Damian Lloyd - would you agree with that article? If not, would you be willing to put together a post with updated tips for green screen filming? I'm sure a lot of us are venturing into new territory with this!
At a guess, the noise certainly seems likely to have originated from colour contamination from the background causing the problem. Perhaps using a different, and more accurate, keying program and keeping the key parameters tighter for hue, saturation, and brightness. Might take a few passes, taking out parts of the colour to be keyed each time. Or even a matte so that the keyer does not act on those areas that exhibited noise.