Is FxImageColorInfo valid?
Is FxImageColorInfo valid?
- Subject: Is FxImageColorInfo valid?
- From: Stonewall Ballard <email@hidden>
- Date: Thu, 30 Oct 2008 19:54:37 -0400
I've found that in Motion, I always get back
kFxImageColorInfo_RGB_GAMMA_DEFAULT_MACINTOSH_DISPLAY from [inputImage
colorInfo] in renderOutput:withInput:withInfo. In FCP, I always get
back kFxImageColorInfo_RGB_GAMMA_VIDEO. This is with RGB images,
regardless of depth. I tried this with lots of different input images,
still, synthetic, and video, with the same results.
Using some clips that I created with varied color profiles in AE, it
appears that in Motion, the input image has linear gamma at the point
that it reaches my FxPlug. The compensation suggested by Pete Warden's
message "Recommendations for plugins that want to work internally in
linear color",
<http://lists.apple.com/archives/pro-apps-dev/2008/Feb/msg00015.html>
seem to seriously overcompensate for the gamma in FCP, and is
unnecessary in Motion.
Some of my code wants to work in linear rgb, but I don't see how to
interpret these results.
Can anyone clarify this?
TIA for any help.
- Stoney
--
Stonewall Ballard
email@hidden http://stoney.sb.org/
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