• Adobe Premiere Pro

  Premultiplied Alpha in a Quicktime File

  Posted by Michael Goldberg on July 9, 2007 at 1:24 pm

  Hi,
  I just imported a quicktime that was rendered in an avid premultiplied over black. There doesn’t seem to be anyway to interpret the alpha in Premiere Pro? Obviously I’m getting a bit of black fringe that I don’t want. Is this hidden somewhere, or is it just missing?

  Mike

  Pentti Kakkori replied 18 years, 10 months ago 2 Members · 3 Replies
• 3 Replies

• 

  Pentti Kakkori

  July 9, 2007 at 6:23 pm

  Maybe unmult will help, it’s free

  https://www.redgiantsoftware.com/unmult.html

  Unzip the file to Plug-ins/en_US/AEfilters.
  You will find Unmult in Video Effects/Knoll.
• 

  Michael Goldberg

  July 10, 2007 at 12:56 pm

  Hi,

  Unmult will get rid of black. I have an alpha in the file, I’m looking to interpret it correctly as premultiplied. I can easilly do this in After Effects, but see no way in Premiere.

  MG
• 

  Pentti Kakkori

  July 10, 2007 at 5:14 pm

  That’s true and rerendering in AE is not an option?
  Maybe PPro CS3 treats alpha same way as AE.
  https://livedocs.adobe.com/en_US/PremierePro/3.0/help.html?content=WSbaf9cd7d26a2eabf53ab041041081290f-7ff6.html

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