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Activity Forums Apple Motion How to remove black border/frame from keyed layer

  • How to remove black border/frame from keyed layer

    Posted by Tom Hancock on August 6, 2008 at 12:58 pm

    Hi,

    I am currently working on a scene which involves layered still images and also some footage of a person shot in front of green screen which I have since keyed out using Motion’s Blue/Green Screen filter – which is placed in the foreground of the 3D ‘space’. The problem I’m having is that there appears to be a sort of ‘dancing’ black edge which outlines the entire frame of the keyed layer. If for example I use the crop tool to say remove the outer left/right areas of the layer, the black outline simply changes shape to match the new cropped shape of the layer.

    Is there a simple way to get rid of this?

    Cheers

    Stephen Smith replied 18 years ago 4 Members · 5 Replies
  • 5 Replies
  • Stephen Smith

    August 6, 2008 at 2:35 pm

    Try the mask tool on the keyed clip. Hope this helps.

    Stephen Smith
    Salt Lake Video

    Check out my DVD Money Making Graphics & Effects for Final Cut Studio 2

  • David Bogie

    August 6, 2008 at 3:57 pm

    [Tom Hancock] “he problem I’m having is that there appears to be a sort of ‘dancing’ black edge which outlines the entire frame of the keyed layer. If for example I use the crop tool to say remove the outer left/right areas of the layer, the black outline simply changes shape to match the new cropped shape of the layer. “

    No idea what you mean by that last part.
    Black edges around a keyed source are usually simply alpha interpretation settings for the layer. Change yours.
    did you prerender the greenscreen key? Nest it?

    bogiesan

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

  • Noah Kadner

    August 7, 2008 at 1:22 am

    Draw a bezier mask around the shot to remove the black areas. It’s called a garbage matte in old-school compositing terms.

    Noah

    My FCP Blog. Unlock the secrets of the DVX100, HVX200 and Apple Color and Win a Free Letus Extreme.
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  • Tom Hancock

    August 7, 2008 at 4:20 pm

    Hi,

    Thanks for the replies. After trying the first two, I was recommended to install the software update (3.0.2) then – magically – problem solved. Weird, but good.

    🙂

  • Stephen Smith

    August 7, 2008 at 4:53 pm

    How funny, I’m glad that solved the problem.

    Stephen Smith
    Salt Lake Video

    Check out my DVD Money Making Graphics & Effects for Final Cut Studio 2

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