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Fine Tuning After Effects Motion Tracking
I came here hoping that someone can help.
This is a common for me when motion tracking. I will find strong points to track from (doesn’t seem to be the problem) and since I mainly work with Digital footage there is always some sort of grain involved.
Now when I motion track after effects always creates tiny jitters in the tracking. And when a text layer is pick-whipped to the null object that I apply the tracking to you can clearly see it is as if the text is vibrating. How do I get rid of this?
I turned off subpixel sampling which fixes most of the shaking and I always stop tracking is confidence is below %90 but that still doesn’t fix the problem.
I tried enhancing the pixels during tracking – – that doesn’t work.
Sometimes I can get away with a smooth expression on the keyframes, but if there is radical movement or rotation in the frame this expression doesnt always work.
I use . smooth(width = .2, samples = 5, t = time)
Any other advice? Especially working with HDV footage?
Doing a remove grain before I track the footage takes forever and doesn’t always work so I am looking for an alternative.
Thanks,
CJ
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5 Replies
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Getting a good track is seldom a one-click process but the result of several passes, tracking both forward and back.
Check out this free assistant thanks to NAB. There is a good video tutorial also available from this link.
https://www.vfxtalk.com/forum/trackerviz-cs3-t16031.html?s=5595d1516f77a6bf8196c49366667cd1&
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I also often use two passes with the AE tracker. I track from the beginning to the end and make a second pass from the end to the beginning. I then, average the two passes using an averaging script.
This often helps. I got the script from someone on cow, I don’t remember who. But, if there’s interest I can make the script available.
Eric
Eric Goldstein
Giraffe Film Company
Los Angeles
eric@giraffefilm.com -
I am having the same problem with tracking and I just want to say thanks because that smooth script made a huge difference!
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I am interested…
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Yeah, me, too, big time. The vfxtalk site that had the tut link is down. The only tuts on trackerviz I can find are by the dood that requested it from NAB and they deal only with corner pin type tracking.
I cannot for the life of me figure out how to use it with specific mask vertexes, like the ones created with auto trace. Any tut, for any script or app, that specifically goes into per vertex mask tracking would be amazing. I am trying to track non green screen dancers moving quikly and with very little contrast from the background. It is a relative nightmare
Blood type O negative. I bleed ones and zeros
Shifted Leering, Any Perspective
Shifting Literally All Perceptions
SLAP
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