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Gamma shift in FCP 7 Effect?

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Hans Damkoehler
Gamma shift in FCP 7 Effect?
on May 18, 2011 at 8:37:23 pm

Hey folks,

I'm adding a simple stock FCP wipe between a ProRes 4444 clip to a ProRes 422 (HQ) clip and as soon as the wipe effect begins my outgoing clip darkens by 10% or so. Arrgh.

I'm demoing sapphire (sigh) and using their wipe doesn't mess with it at all.

Any idea what's up and what I can do to negate the gamma shift with the stock effect? Wish I had the $1600 for sapphire, but not for a wipe!



Hans Damkoehler
VideoBloom, Inc.
Senior Video Editor/Producer

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Dustin Parsons
Re: Gamma shift in FCP 7 Effect?
on May 18, 2011 at 10:16:55 pm

I haven't run into that exact problem but something similar. I would try R-Clicking on the clips and going to Item Properties > Format... and make sure the Alpha and Composit is the same for both clips.

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Sascha Engel
Re: Gamma shift in FCP 7 Effect?
on May 19, 2011 at 5:35:17 am

If the Alpha Channels settings fro both are the same, the next step I'd try, is to make both clips the exact same codec. And just for the sake of experiment, export both into another Codec, e.g. Animation or Uncompressed10-Bit, and see, if it still happening then.


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