I found a clock-offset issue in my case, so the data existed but the time windows never actually intersected.
Whichever source you choose, make sure its recording time overlaps the camera recording. Time overlap is the first thing I check when Stats cannot fin...
For a presentation overlay I would allow light smoothing, but I would not silently turn it into 'ground truth'. GPS-derived altitude can be noisier th...
Treat it as a test, not an assumption. Compare the remuxed file with the original in the telemetry software you actually plan to use.
I would check whether the camera had a good satellite lock before the important take and whether the environment had a clear enough view of the sky.
Makes sense. I am going to treat the original MP4 as the telemetry master even if I edit from proxies.