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Live keying with Blackmagic card?

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Nate Vander PlasLive keying with Blackmagic card?
by on May 26, 2010 at 8:30:08 pm

I have a shoot coming up which will be on green screen. We'd like to be able to preview what the key will look like live right on set. We're shooting on the RED and have a Mac Pro with a Blackmagic HD Extreme card (not the current one that does 3D, but pretty new yet). What is the best (and cheapest) way to do this? Is there software we'd need to buy or will AE or Final Cut work? We do not need to record the footage or have the key be perfect live, just give us a good reference and help us make important tweaks to lighting on set. It's also possible that we'll be doing a screen replacement on a (mostly) stationary phone and might want to use the live key on a monitor to guide the hand model to press the right buttons.

Thanks in advance for you help!

Nate


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Dave LaRondeRe: Live keying with Blackmagic card?
by on May 26, 2010 at 8:44:57 pm

AE definitely will not cut it for previewing a chroma key. It has to work with files, and a video-in isn't a file.

I recall people who wanted to do something similar on the FCP forum, but I don't recall the outcome.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Nate Vander PlasRe: Live keying with Blackmagic card?
by on May 26, 2010 at 8:48:31 pm

Yeah, I had severe doubts about AE being able to handle it. Maybe I'll try posting this in the Final Cut forum unless someone here has any other ideas.



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Walter SoykaRe: Live keying with Blackmagic card?
by on May 26, 2010 at 9:10:27 pm

I think you could use either BoinxTV or VeeScope Live for live chroma keying on a Mac. Trials of both are available for testing.

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog - What I'm thinking when my workstation's thinking
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Nate Vander PlasRe: Live keying with Blackmagic card?
by on May 27, 2010 at 2:04:22 pm

Thanks Walter! I will try these out and see if they work for us.



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David ChaiRe: Live keying with Blackmagic card?
by on May 27, 2010 at 3:22:51 pm

Rent a Sony/Panasonic Switcher which has a built in Chromakeyer, and then you can feed the background with the Macpro and the front with the Camera HDSDI feed. Then you can preview the output in HDSDI live.

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http://www.davidchai.com
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Warren MorningstarRe: Live keying with Blackmagic card?
by on May 27, 2010 at 4:10:57 pm

A Tricaster will also do a live key, although it is much more forgiving than Keylight.



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