Tracking movement in areas

Nov 1, 2008 at 2:24am

Tracking movement in areas

Hello all,

I’m looking to trigger different sound effects stored in a ~buffer. I would like be able to assign sound effects to different pixels area in a video. Imagine rectangles overlaid on a video feed separating areas. When the pixels change in those rectangles (someone moves their hand in front of it) I want the buffers to trigger.

Any ideas/tutorials/3rd party add-ons that I should look at?



Nov 1, 2008 at 5:22am

an easy way without any actual “tracking” per say would be to get the frame difference (jit.op @op absdiff) then use jit.3m to get the mean. From there it is easy to set a trigger point. You could then divide the screen into smaller segments via jit.submatrix or jit.scissors to several areas…

just one quick, simple possibility.
hope it helps.

Nov 1, 2008 at 5:49am

Thanks so much, I’ll definitely check these out!

I’ve never really worked in Jitter before, I keep looking through the help files, but it’s always nice to have a starting point.




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