Quote Originally Posted by lawtonglenn View Post
whenever I did two cams like that it took quite some time to synchronize the videos sliding one relative to the other at ever increasing time resolution until it was perfect... how did you do it?
The shadow under the bridge. I figured the car was right about the same length as the width of that shadow, and using the sliders/buttons I put the nose of the car from the front camera view on the downstream edge of the shadow, and the tail of the car from the rear view on the leading edge of the shadow. Worked perfectly and only took a few minutes of tweaking.

Absent that, I'd find a trackside brake marker and put it about midway on the car in both views (estimated of course, because you can't see sideways.)

GA