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Boris Chromakey adds horizontal noise to blacks

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Laura Gruszczynski
Boris Chromakey adds horizontal noise to blacks
on Sep 22, 2010 at 6:35:58 pm

Hi,
I recently purchased Boris Fx Chromakey.
I shot two talking heads in dark suits on a green screen using Panasonic HVX200, DVCPRO HD 720p60,
In addition to regular lighting, the subjects are also lit from behind with minimal spillage.
When I use the Boris Chromakey filter on the footage, I get evenly spaced horizontal striping on the dark suits. It almost looks like interlacing, even though the footage is not interlaced.
No manipulation of the slider controls eliminates these lines completely.
I usually key in AE using Keylight and do not have this problem.
Any suggestions?
Thanks!

Laura


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Boris Yamnitsky
Re: Boris Chromakey adds horizontal noise to blacks
on Sep 25, 2010 at 3:19:24 am

I've never seen this problem in 15 years since I wrote this filter. Can you send me a single frame of your clip? Or the whole clip if it's not too big? Also, are you using BCC Chromakey or BCS Chromakey Studio? I assume you are using Final Cut?

boris@borisfx.com

Boris Yamnitsky
BorisFX


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Paul Ezzy
Re: Boris Chromakey adds horizontal noise to blacks
on Oct 1, 2010 at 8:17:36 pm

Hi Laura,

To fix the problem I just had to tweak some of the RBG color weight and flare mix/flare ratio settings. Adjusting the lightness and matte density also helped.

-Paul

-Paul E.


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Laura Gruszczynski
Re: Boris Chromakey adds horizontal noise to blacks
on Oct 4, 2010 at 6:17:02 pm

Thank you Paul,
The CleanKey preset you sent me worked well.
I'd like to share it with other users on the Cow.
Where can people download it and other presets like it?

Laura


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