How to smooth out motion tracking?

[Mike Clasby]

You can try the flipside of Wiggle, the Smooth expression, to the layer the Tracker tranformed.

smooth(2, 5)

This from AE Help is all I know about the smooth expression, but I do know it’s not as intuitive as wiggle, raising the width smoothes more:

Number or Array smooth(width= 2, samples=5, t=time) {width, samples, and t are numbers} Applies a box filter to the value of the property at the specified time, and smooths the result over time. Width (in seconds) is the range of time over which the filter is averaged. Samples equals the number of discrete samples evenly spaced over time. Generally, you’ll want samples to be an odd number so that the value at the current time is included in the average. For example, position.smooth(.1, 5).

The larger the first number, the smoother it gets, quickly. For a smooth, but less smooth than 2, try .5 or so.

Apply the smooth expression to any keyframed parameter thats jumpy.

Apply an expression, by copying the expression, Alt-click the stopwatch (of the parameter to be smoothed) and Paste.

[Aharon Rabinowitz]

Yoiu can also try applying the smoother to the rough spots.

Window > The smoother

Select the offending keyframes and then use the smoother dialog to remove unneeded keyframes.

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Aharon Rabinowitz
arabinowitz(AT)yahoo(DOT)com
http://www.allbetsareoff.com

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[Darby Edelen]

You can apply the expression smooth() to any keyframed property to smooth the values. It can take a few arguments, I don’t have AE in front of me now so I can’t tell you in what order to enter them but you should be able to find them in the AE Help.

The most common arguments to change are the duration of the sample and the number of samples.

Darby Edelen
DVD Menu Artist
Left Coast Digital
Aptos, CA