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gamma curve applied in fcp when jumping around the timeline
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gamma curve applied in fcp when jumping around the timeline


  • Subject: gamma curve applied in fcp when jumping around the timeline
  • From: Benjamin Kent <email@hidden>
  • Date: Fri, 28 Sep 2007 16:45:36 +0100

Hi,

I may be going mad, but it appears that the image data I get in an FxPlug plug-in when jumping around the timeline in FCP is different to when I render a sequence - it appears that it has been through a slight gamma correction (although nothing as extreme as sRGB).

To verify this I dropped a linear ramp image into my timeline - zero on the left and full white on the right. Plotting the intensity from left to right inside the plug-in yielded a curve when jumping around the timeline, but a straight line (as expected) when rendering the sequence.

Is this expected behaviour - maybe something to do with FCP correcting for the display? If so, is there a way to know if the data you're getting has been corrected, or whether you're in a render?

Thanks

Ben
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