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Movement with Keying in 15b Mac

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Ted Irving
Movement with Keying in 15b Mac
on Aug 2, 2019 at 4:09:04 pm

The background moves with the person, or object, that is keying over the background. How can we get this set to not move the background but just the person/object being keyed?

Ted Irving
ENG Cinematographer
http://www.beingus.tv
tedirving@beingus.tv
@_beingUS_TV


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Marc Wielage
Re: Movement with Keying in 15b Mac
on Aug 4, 2019 at 7:32:41 am

I don't understand what you're saying. Is this a green screen background? Are you keying the person itself? Are you keying only what's around the person? Are you using a garbage matte? Is something being tracked?

Explain this with a lot more words, and maybe upload a still frame, and I think you'll get more feedback.


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Ted Irving
Re: Movement with Keying in 15b Mac
on Aug 4, 2019 at 1:44:18 pm

Just a simple keying of a person over a still background. When trying to move the person from left screen to right everything moves, the background moves as well as if is merged with the top layer person on a green screen.

Ted Irving
ENG Cinematographer
http://www.beingus.tv
tedirving@beingus.tv
@_beingUS_TV


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Glenn Sakatch
Re: Movement with Keying in 15b Mac
on Aug 10, 2019 at 7:56:29 pm

Perhaps a screen shot of the layout, and where you are doing the movement?

Glenn


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Ted Irving
Re: Movement with Keying in 15b Mac
on Aug 14, 2019 at 1:58:56 pm

Here is a link to what is happening. You can see the alpha being cut as you move the keyed subject around.
https://www.dropbox.com/s/olwl53nd0ldibnf/IMG_2411.MOV?dl=0

Ted Irving
ENG Cinematographer
http://www.beingus.tv
tedirving@beingus.tv
@_beingUS_TV


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Glenn Sakatch
Re: Movement with Keying in 15b Mac
on Aug 15, 2019 at 1:30:34 am

Ok, just to clarify, the background isn't really moving with the person. The background is totally static, what is happening is your key is cropping out the background. As you expand your key frame, you are expanding the amount of background that is visible. I think we all thought from your initial post, that if you panned the subjects left, the background was moving left as well.

Try putting a window/mask around the green subjects, to change the area Resolve is working on.
I'm guessing your two images are not the same size, and your green screen is the smaller of the two?

Part of the problem is probably that you are pulling a key in Resolve, which wouldn't be my first choice. I would probably prefer to take it into fusion, which is more designed for comp work.

Glenn


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