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Activity Forums Adobe After Effects Alpah channel issue

  • Alpah channel issue

    Posted by Joseph Mehr on February 6, 2007 at 6:40 pm

    Hi !
    I have some troubles exporting footage with alpha channel out of AE .
    (QT animation millions+)
    My settins are OK, and a little test with a rescaled picture moving on the by default black AE screen gives me the desired alpha.
    But here I keyed out a talking head using color difference key, the result seems quite good in AE, but my make movie doesn’t produce the alpha. What kind of setting did I miss, I know I have done this previously and did NOT have this kind of issue
    Many thanks in advance

    Sep

    Joseph Mehr replied 19 years, 3 months ago 2 Members · 2 Replies
  • 2 Replies
  • Steve Roberts

    February 6, 2007 at 7:07 pm

    If you push the little checkerboard button at the bottom of the comp window, do you see a checkerboard anywhere in the keyed shot? You should.

  • Joseph Mehr

    February 6, 2007 at 9:16 pm

    I am no longer in front of AE, right now, but will look for this button ASAP.
    Many thanks for answer and for your help, Steve.

    Sep

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