Topic: Playback speed automatically changes
A student wrote to me with this problem:
When I try to configure the video timing to 240 fps (iPhone slow-motion) the video play speed drops down to 0% and when I try to move it to get the video to play it will change automatically drop back down to 0% so the video will not play.
Upon troubleshooting (restarting and not bothering to adjust video timing settings)
When I try that the video plays at 10% speed but I filmed it in slow mo to begin with so it is really slow now.
So I started trying it out myself. I had a slo-mo video of myself kicking a soccer ball and at first it seemed to work fine. However, as it played through the video a couple times, the playback speed started to decrease to 90%, to 80%, played a few more times and eventually got to 50% playback speed. If I set the playback speed to 1.5x it almost immediately slows it down to 1x and as it repeats through the video again goes down to slower speeds.
I'm guessing this has to do with memory allocation, but I'm not entirely sure and I'm not at all sure what to tell my students to do to troubleshoot this issue.