I was recently introduced to Tracker and so far I really like it. I find it easy to use and the autotracking feature saved me a lot of time on a couple of occasions.

I have a question, or if you will a suggestion, regarding tracking of time intervals for periodic motion. Say I have a rotating shaft that I'm filming in a way so there is a unique feature that comes into the frame at regular intervals. Perhaps a marking I made or unique glare or whatever. Would it be possible to track the time between the two revolutions? To the best of my knowledge, this is not possible to do in Tracker. But I'm wondering if it is possible to implement or if there is some sort of clever hack I can do to make this work. What gave me the idea is seeing how well Tracker followed some funny, low contrast shapes in my previous attempts. It was really impressive.