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Adjustment layer changes gamma?

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Chris Stevens
Adjustment layer changes gamma?
on Jan 14, 2016 at 11:01:57 am

Applying an adjustment layer with a letterbox crop added & it changes the gamma of all the underlying shots?
Any ideas why please?

Chris Stevens - Waterline Media. Marine Production Company.
FCPX,Motion,AE, Resolve


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Noah Kadner
Re: Adjustment layer changes gamma?
on Jan 15, 2016 at 3:46:39 am

What format is the footage? It might be getting rendered to a different color space than it was shot in originally. You're only seeing that on the letterbox because its forcing a render vs. just playing back from the original format.

Noah

FCPWORKS - FCPX Workflow
FCP eXchange - FCPX Workshops


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Chris Stevens
Re: Adjustment layer changes gamma?
on Jan 15, 2016 at 9:12:18 am

Thanks for the reply Noah.
The format is XAVC HD @ 100Mb/s (from a Sony FS7). I also have GoPro H264 clips in the edit which behave the same as the XAVC.
Have tried disabling the adjustment layer then applying an effect, to force a render, this does not create a shift in gamma though?

Chris Stevens - Waterline Media. Marine Production Company.
FCPX,Motion,AE, Resolve


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Chris Stevens
Re: Adjustment layer changes gamma?
on Jan 15, 2016 at 9:14:19 am

Sorry. Correction to my last post.
The GoPro H264 clips behave in the same way as the XAVC. i.e. the adjustment layer forces a gamma shift.

Chris Stevens - Waterline Media. Marine Production Company.
FCPX,Motion,AE, Resolve


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Noah Kadner
Re: Adjustment layer changes gamma?
on Jan 15, 2016 at 6:01:50 pm

A gamma shift where- in FCPX? Or in the finished footage playing out to a broadcast monitor?

Noah

FCPWORKS - FCPX Workflow
FCP eXchange - FCPX Workshops


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Chris Stevens
Re: Adjustment layer changes gamma?
on Jan 16, 2016 at 11:42:02 am

Gamma shift appears in FCPX UI, on monitor via Black magic Ultra I/O & on exported ProRes file.

Chris Stevens - Waterline Media. Marine Production Company.
FCPX,Motion,AE, Resolve


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Jeff Kirkland
Re: Adjustment layer changes gamma?
on Jan 16, 2016 at 11:58:19 am

What are you using as an adjustment layer? Have you tried a different adjustment layer? What effects are applied to it? What happens if you apply the adjustment layer over footage in a new project?

Just wondering if it's the adjustment layer, or something applied to it that's causing the colour shift.

Jeff Kirkland | Video Producer | Southern Creative Media | Melbourne Australia
http://www.southerncreative.com.au | G+: http://gplus.to/jeffkirkland | Twitter: @jeffkirkland


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Chris Stevens
Re: Adjustment layer changes gamma?
on Jan 16, 2016 at 12:28:00 pm

Using the adjustment layer from the text browser. Didn't know there was an alternative? Please advise.
Applying a letterbox crop.
Same gamma shift when in new project.

Chris Stevens - Waterline Media. Marine Production Company.
FCPX,Motion,AE, Resolve


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Chris Stevens
Re: Adjustment layer changes gamma?
on Jan 19, 2016 at 8:43:34 am

Have solved the issue.
Opened the adjustment layer, from the text browser, into motion. Changed nothing then published it to FCPX.
All ok now. No idea why?

Chris Stevens - Waterline Media. Marine Production Company.
FCPX,Motion,AE, Resolve


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Noah Kadner
Re: Adjustment layer changes gamma?
on Jan 19, 2016 at 10:42:26 pm

Might have had something hidden someplace that caused that shift- hard to say. In general I find copy/paste attributes a lot more predictable/useful than adjustment layers which are really more of a workaround in FCPX and not so much a built-in workflow.

Noah

FCPWORKS - FCPX Workflow
FCP eXchange - FCPX Workshops


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