Thanks to Vern on the heads up on this. It is a free kinematic analysis tool. This could be very useful. The only problem is, the way I understand, you would first need to build a calibration structure. And, that structure would need to be placed where you plan to do the filming. So, it would be best for those who have a dedicated area put aside for this purpose. What do you think of the idea of building a portable one that you could take apart and put back together? Would it be worth the effort? Otherwise, I wouldn't even have the room to store something like that. Oh, one annoying thing. You have to convert your video into .avi before you can download it. Weird but do-able.