• Apple Final Cut Pro

  Alpha not recognized in PR4444

  Posted by Oliver Peters on July 4, 2015 at 4:18 pm

  I’ve run into this issue with ProRes4444 source files inside FCP X. The file in question has mixed alpha conditions. The first segment in the file is a reference composite of animation over video. This is followed by the animation clean. This pattern is repeated for a series of animation clips.

  The files was exported from the client’s FCP X (all clips as primary storyline clips, not connected). When I preview the file using QuickLook, I can clearly see that the sections of just the animation have an alpha. But when I try to key these as a connected clip over video in FCP X, it does not recognize that there is an alpha there and I can’t change it in the info pane.

  The client re-exported only the animations without the reference composites and these keyed fine and FCP X recognized that there was an alpha in the file.

  My guess is that if your file is mixed, like the first export, FCP X won’t recognize the alpha, because the first clip in the file doesn’t have an embedded alpha. I presume this is a bug. Thoughts?

  – Oliver

  Oliver Peters Post Production Services, LLC
  Orlando, FL
  http://www.oliverpeters.com

  Jeremy Garchow replied 11 years ago 2 Members · 2 Replies
• 2 Replies

• 

  Jeremy Garchow

  July 4, 2015 at 5:50 pm

  See here. It seems to be a bug, there is a workaround;

  https://forums.creativecow.net/thread/344/36774
• 

  Jeremy Garchow

  September 6, 2015 at 7:21 am

  Looks like this was fixed in 10.2.2

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