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Activity Forums Adobe After Effects motion blur from corner pin translation

  • motion blur from corner pin translation

    Posted by Geezer on December 29, 2005 at 6:29 pm

    I did a corner pin track in AE which worked quite well. Once I turned motion blur on, the track
    seems to no longer be tight. As best as I can tell it appears the AE motion blur is only
    calculated based upon position and rotation translations. Surely if corner pin tracking is
    an element of AE tracking, you must be able to calculate motion blur based on corner pin translation. I couldn’t get it to work , even when precomposing? Any thoughts?

    Robert Houghton replied 20 years, 5 months ago 4 Members · 5 Replies
  • 5 Replies
  • Joey Korenman

    December 29, 2005 at 8:26 pm

    If the shot isn’t insanely long, just manually keyframe a directional blur. I’ve done this before and it works well, just takes a little more effort.

    joey

  • Mylenium

    December 29, 2005 at 8:36 pm

    Nope, AE does not automatically calculate motion blur for effects. Your observations are thus correct. The only way around this is using plugins such as CC Force Motion Blur or ReelSmart MotionBlur.

    Mylenium

    [Pour Myl

  • Geezer

    December 29, 2005 at 9:53 pm

    Thanks, I’ll try cc motion blur. Its odd though that AE supports
    corner pin tracking but doesn’t consider it in motion blur.

  • Mylenium

    December 29, 2005 at 10:11 pm

    [geezer] “Thanks, I’ll try cc motion blur. Its odd though that AE supports
    corner pin tracking but doesn’t consider it in motion blur.”

    Nope, that’s not odd, that’s an implementation weakness. ;o) I’m not a programming guy, but as I understand it, plugins are not allowed to request temporal sub-sampling (which would be required for motion blur) and would have to do all such calculations themselves. So if it’s not coded in the plugin, you’re out of luck. CC Motion Blur does some sort of trickery by making AE think that the effect runs at a higher framerate and thus can request more inbetween buffers. Well, perhaps one day we will see the SDK/ API opened up and all effects will automatically get considered for motion blur. It definitely would be nice.

    Mylenium

    [Pour Myl

  • Robert Houghton

    December 30, 2005 at 12:32 am

    I would love it if AE would carry the OpenGL implementation over to their effects like corner pin. That way it would be a realtime polygon deformation, it would also open the door to more flexibilty in distortions that are actually reflected in 3D space.

    -Rob

    Motion Graphics Animation
    Professional & Freelance
    Respond2

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