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Activity Forums Apple Final Cut Pro Legacy Alpha from AE into FCP looks like Garbage

  • Alpha from AE into FCP looks like Garbage

    Posted by Jordan O’leary on January 29, 2008 at 9:05 pm

    I look around before I posted.

    I expor a shine effect from AE in Animation Codec Straight Through Alpha and when I place it on FCP it brings out a ton of artifacts. THe only way I’ve been able to get rid of it to PreMultiply it from AE but then I loose all the pretty colors from the shine effect. I’ve tried screing with the Modify > Alpha channels in FCP – but to no avail.

    The following is a screen shot of what it looks like IN THE MIDDLE OF A CROSS DISSOLVE in FCP. After the dissolve it looks fine. THE ORANGE BARS are added for censorship so don’t look at that as part of the problem. From AE this is a Straight Alpha – Animation Millions + IN FCP it’s Modify > Alpha = Straight.

    Bad Alpha in FCP

    Jordan O’leary replied 18 years, 3 months ago 6 Members · 9 Replies
  • 9 Replies
  • Paul Escandon

    January 29, 2008 at 10:03 pm

    Where’s the screen shot?

  • Jordan O’leary

    January 29, 2008 at 10:20 pm

    I’m an idiot – here’s the real pic

    Really bad Alpha!!.

  • Matthew Nelson

    January 29, 2008 at 11:21 pm

    Can’t tell much from the still. As a guess is the animation and the video it is cross dissolving to/from on the same video track? If so I have had render issues that look like banding on steroids. The work around was to put them on different tracks and use the cross dissolve on the upper track.

    Matt

  • Aaron Neitz

    January 29, 2008 at 11:32 pm

    This always works for me:

    AE = render to Animation + Alpha. Premultiplied
    FCP = Modify -> Alpha -> Black

  • Danny Fox

    January 30, 2008 at 10:04 am

    Hi,

    I had a similar problem with a recent project and the way we got around it was to export the clip that was artifacting as a image stream of JPEGs. This would not be ideal if you are trying to cross drissolve over but as one of the previous threads mentioned, you could place the next clip on another video level and put the transition over that.

    It’s all well and good having some solutions of how to get around it but does anyone know the actual cause of this problem? Is it a bug or is there a setting in FCP that can be applied to prevent this?

  • Tom Wolsky

    January 30, 2008 at 12:20 pm

    JPEGs are a compressed format and carry no transparency. They’re not relevant to the problem. Your problem may be different, but a JPEG image sequence solution is usually not a good one.

    All the best,

    Tom

    Class on Demand DVDs “Complete Training for FCP6,” “Basic Training for FCS2” and “Final Cut Express Made Easy”
    Author: “Final Cut Pro 5 Editing Essentials” and “Final Cut Express 3.5 HD Editing Workshop”

  • Jordan O’leary

    January 30, 2008 at 6:24 pm

    The work around was to put them on different tracks and use the cross dissolve on the upper track. [Matthew Nelson] “The work around was to put them on different tracks and use the cross dissolve on the upper track.”

    This worked perfectly! Thank you.

  • Jordan O’leary

    January 30, 2008 at 6:27 pm

    THIS [Aaron Neitz] “This always works for me:

    AE = render to Animation + Alpha. Premultiplied
    FCP = Modify -> Alpha -> Black”

    This ALSO worked perfectly – in fact it works better than laying the adjacent clip on a different track because you can do the actualy cross dissolve on the same track (while preserving the beautiful color). Thanks Aaron – nice fix.

  • Jordan O’leary

    January 30, 2008 at 6:27 pm

    THIS [Aaron Neitz] “This always works for me:

    AE = render to Animation + Alpha. Premultiplied
    FCP = Modify -> Alpha -> Black”

    This ALSO worked perfectly – in fact it works better than laying the adjacent clip on a different track because you can do the actualy cross dissolve on the same track (while preserving the beautiful color). Thanks Aaron – nice fix.

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