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Black Level, Gamma or what?

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Florian Gintenreiter
Black Level, Gamma or what?
on Jun 28, 2013 at 9:51:41 pm

Sorry for cross-posting, but I'm not sure wether this belongs into the FCPX or DaVinci Resolve forums, so I posted in both.

I graded a sequence in DaVinci Resolve 9. As a client-monitor I use a panasonic plasma connected to the BlackMagic DeckLink card in my MacPro.
I do know that it's not a calibrated monitor, but what I see is a relative problem rather than a absolute one.

I render the sequence in Resolve to a series of ProRes4444 files, export an XML and import the whole shabang into FCPX. I rendered at "Unscaled Full Range Data", because I don't need to be TV safe.

When I look at the footage in FCPX the blacks are at 0% on FCP's internal Waveform as opposed to below that and the whites are a good deal lower than 110% where they start to clip.

The images look flatter and less crisp than what I graded them to in resolve.

Does FCPX remap the black/white levels or do some gamma voodoo?

Remember I'm looking at the output of the two programs on the same monitor connected to the same I/O card, so even if the plasma is not a calibrated client-monitor at least it should look the same, no?

Help appreciated.

________________________________________
Director of Photography, Director, Editor
Vienna, Austria


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Bill Davis
Re: Black Level, Gamma or what?
on Jun 28, 2013 at 10:22:56 pm

This might be just me, but your post process seems kinda backwards to my thinking.

You're grading your footage BEFORE you edit it?

Not sure I understand that.

I mean I guess I could see that if you're shooting RAW and need to do a "1st light" correction. Is that what's happening here?

I always thought you did assembly and minor problem solving in your NLE. Then took the resulting master with all it's composites and transitions - and put THAT through color grading so that you're creating a properly graded master.

I've never heard of doing significant scene by scene color grading BEFORE editing - but maybe that's just because I don't do feature type work.

Anyone else?

Know someone who teaches video editing in elementary school, high school or college? Tell them to check out http://www.StartEditingNow.com - video editing curriculum complete with licensed practice content.


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Florian Gintenreiter
Re: Black Level, Gamma or what?
on Jun 29, 2013 at 8:55:38 am

I am not grading the rushes, I'm grading a XML file out of FCPX.

________________________________________
Director of Photography, Director, Editor
Vienna, Austria


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Jeremy Garchow
Re: Black Level, Gamma or what?
on Jun 29, 2013 at 1:17:02 am

If you bring the rendered movie back in to Resolve, what do you see?


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Florian Gintenreiter
Re: Black Level, Gamma or what?
on Jun 29, 2013 at 8:56:00 am

It looks like it should.

________________________________________
Director of Photography, Director, Editor
Vienna, Austria


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Jeremy Garchow
Re: Black Level, Gamma or what?
on Jun 29, 2013 at 3:01:29 pm

Is there any chance you can upload a full res one second test render just so that we are looking at the same thing?


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Florian Gintenreiter
Re: Black Level, Gamma or what?
on Jul 1, 2013 at 7:22:12 pm

I uploaded a clip here: https://www.dropbox.com/s/c7unq1v9aswrsti/CHIMERES_Testrender.mov

________________________________________
Director of Photography, Director, Editor
Vienna, Austria


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Jeremy Garchow
Re: Black Level, Gamma or what?
on Jul 1, 2013 at 7:23:01 pm

Awesome and thank you.

I'll take a look.


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