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Activity Forums Apple Final Cut Pro Legacy alpha and matte handling

  • alpha and matte handling

    Posted by Neil Young on September 23, 2005 at 4:25 pm

    Apologies for the basic question. Our office manual is missing.

    A producer just handed me a QT for fill and a QT for matte. I need to get a luminance
    matte, and haven’t quite figured it out with this matte filter.

    Also, f I import a quicktime with an alpha, will FCP automatically work with the alpha,
    so that there is transparency where it should be? The way After Effects works?

    David Bogie replied 20 years, 7 months ago 3 Members · 2 Replies
  • 2 Replies
  • Todd Perchert

    September 23, 2005 at 4:49 pm

    Place your matte on V1 and your fill on V2, control click on V2, select composite mode as Travel Matte-Luma.

    You can place a QT with Alpha directly in your sequence and it will key. Transparencies will be where they should be.
    TC

    [neil Young] “A producer just handed me a QT for fill and a QT for matte. I need to get a luminance
    matte, and haven’t quite figured it out with this matte filter.

    Also, f I import a quicktime with an alpha, will FCP automatically work with the alpha,
    so that there is transparency where it should be? The way After Effects works?”

  • David Bogie

    September 23, 2005 at 5:31 pm

    side note.
    We’re not positive, but it appears that FCP uses the first frame or two to determine alpha settings. Thus, if your first few frames contain no alpha information, the clip will not interpreted correctly.

    ALSO, BIG ISSUE: Lots of folks had NO alpha support after they upgraded to FCP5/Tiger/QT7. They had to reinstall FCP and/or QT.

    bogiesan

    This is my standard sigfile so do not take it personally: “For crying out loud, read the freakin’ manual.”

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