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Motion Blur on Corner Pin

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The lack of motion blur for corner-pinning in AE makes the whole Mocha / AE setup fairly useless, but since Mocha is such a great tracker, it was worth working out how to add motion blur in AE from the corner-pin data.
After Effects CS3
Tracking
Presets (ffx)

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The expressions only deal with planar motion-blur, which is good enough for most shots.
A few notes on how to use it:
Copy and paste your corner-pin tracking data from Mocha, and paste it onto your layer in AE as usual. This adds a corner-pin effect to your layer. Then apply this MB_for_Mocha favourite to the same layer. This adds a directional blur effect linked to the corner-pinning. All you need to do now is match the amount of blurring. Move on to a frame in the timeline where you have lots of movement. In the directional blur effect in the timeline, drag the 'Blur length' up until the amount of FG blur matches your BG shot (about 150 works for me). The 'Blur length' will pop back down to 0.3 or so - that's because it's calculating the blur based on the amount that you just gave it divided by the amount of movement for that particular frame.

Presto! Motion blur!
Enjoy!

Yan Masterson - Spot Post - www.spotpost.co.uk

Effects & Plugins

Directional Blur

Keywords

Motion Blur, Preset, ffx

(Min. Version: After Effects CS3, Category: Tracking, Type: Presets (ffx))
posted by MicGyver on Oct 27, 2010

 

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