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need some tips to prepare a better blue/green chroma key in davinci 9
Dear friends, first sorry my english,
I shot last night a tv commercial with blue chroma in Alexa with prores 444 output. I red that prores clips from Alexa are not easy to key.
So is there any advice on how to obtain a better chroma color (blue/green) ajustment in Davinci 9?. For example.. I have this doubt: do I have to color correct the blue color isolated with qualifiers until I have the exact blue signal in the vectorscope? or to check the blue channel with X% luminance? to match this Isolated Blue?
Maybe some more technical tips to bring an exact blue or green color keying? so VFX people can achieve a better result?
Thanks in advance.
Evans Briceño
BLUE films
Caracas, Venezuela.
VZLA. +584166352066 / +582122838114 / USA +1-718-673-3326
vi**********@***il.com / co******@**********ns.com / http://www.virtualevans.com -
3 Replies
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Anything you do to correct or change the background color in Resolve could potentially make things noisier. My advice would be to just provide a good technical grade and then leave the final background tweaking to the composite artist. They can pull clean keys on damned near anything these days.
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I totally agree.
I tend to pull a key of the green or blue BG and then turn it to a neutral grey.
Then I do the grade, sometime if a BG is provided I superimpose that from track 2.
But without a proper OFX keyer, you are fighting an impssible battle.
Resolve keys are for quick interaction and isolation, not perfection.
Always use Ultimate, Primatte or Smoke Modular keyer for proper integration.
(maybe that will change with R10)A slice of color…
Resolve 10b3 , Smoke 2013 EXT
Colorist / VFX / Aerial footage nerd
https://vimeo.com/saschahaber -
Yup. For sure. Go directly to the composite suite.
Your compositor could use something like Key Correct Pro for AE to get the best possible key. With difficult keys you often have to do multiple passes – and the best thing you can do is work with the rawest form of the materials to have total control in the composite environment.
Francois
FireTrigger Inc.
https://firetrigger.com
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