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Activity Forums Adobe After Effects QT’s with Alpha

  • QT’s with Alpha

    Posted by Videobiker on November 9, 2006 at 7:09 pm

    So I have imported to QT clips from Avid…1 is for fill and the other is the matte. When I lay them in the timeline the Trakmatt switch only allows me to select Luma key to get the transparency I want. When I go to the render que I select QT…RGB+Alpha….millions of colors. In the past this has worked great but now in 7.o when I bring it into Avid it has no Alpha.

    Any suggestions?

    TIA

    AT

    Michael Duff replied 19 years, 6 months ago 2 Members · 1 Reply
  • 1 Reply
  • Michael Duff

    November 9, 2006 at 9:02 pm

    firstly make sure the codec you are using supports alpha channels…. like animation…. also it should be millions of colours+ (the + meaning alpha)

    also double check that there is transparency by clicking on the channels button on the composition window (the three overlapping circles) and chose alpha.

    you could test if it is rendering with an alpha by importing the render back into AE and putting something underneath it…

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