Q: How accurate is this thing?
I should not be posting anything about my work unless I can show that it actually works. Over the years I have tested with a mechanical simulator and video recordings with optical position sensors. I have looked for, and asked about existing commercial tools. Lately I am considering a mechanical test sensor, but this will take considerable time to design, build and test. For now I decided to try what appear to be some recent video analysis tools. Kinovea is a video annotation tool designed for sport analysis. I have my 22 year-old Litespeed Ultimate sitting on a trainer, with a flood light and iPhone 2020 SE pointed at the crank arm. I wrapped white tape at either end of my shoe and colored a black dot on each. I was able to capture a sequence of 20 pedal strokes at 60 fps. (My attempts at slo-mo recording ran afoul of simply copying the data off my iPhone. Yes, I even tried the Quicktime export trick.) None of the Kinovea examples I saw inclu...