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help masking an area out of chroma key

Posted: Wed Mar 17, 2021 16:41
by blobe
Hello, sorry if there is a pretty easy solution to this, ive just been self learning Resolume and cant seem to figure out how to make this work!

I have a green screen and im using resolume to key it out, the issue is that some green reflects to my CDJS and they also get slightly keyed out, and become transparent.
green screen 1.JPG
green screen 2.JPG
green screen 2.JPG (22.94 KiB) Viewed 5518 times
I would like to somehow make the chroma key only effect above the edge of my cdjs so this no longer happens, any tips would be appreciated!

Re: help masking an area out of chroma key

Posted: Wed Mar 17, 2021 18:55
by Arvol
@Zoltan, I would think just applying a keystone mask (With a missing feature IMO, "Invert") then a ChromaKey would do the job, but I was unable to get this working without a bit of confusion.
Would you have any suggestions that would work better than my extremely complex solution? lol Thanks :)

For now, give this a shot and it'll get you going.

phpBB [video]

Re: help masking an area out of chroma key

Posted: Thu Mar 18, 2021 09:31
by Zoltán
I'd look at the lighting, backdrop, and camera placing, so the green reflections don't get on the players in the first place. Masking the camera will mask you and your hands too ;)

If you can make the lighting more uniform, (greaseproof paper can already help a lot) increasing the black threshold can get the players opaque.

Re: help masking an area out of chroma key

Posted: Thu Mar 18, 2021 20:19
by blobe
ohh right I forgot that the mask would also effect my hands, ill have to work on some more lighting then! thank you for the reply