I have a constant and very inconvenient issue in RaceChrono iOS overlaid video export. Whenever I do that, I end up getting huge files (~1GB per minute), which have corrupted framerate (660 FPS), and therefore wrong video duration with slowmo taking most of the video.https://imgur.com/a/bOWj7Bi
iOS usually can't open those files at all, and MacOS' QuickTime shows slow-motion segment for the bigger part of the video.https://imgur.com/a/x1F1rSw
The only cure is to open the video in iMovie, remove speed adjustments and re-export, which results in 10x smaller file with same quality.
Source video is GoPro 1080p/50fps, added and manually synced with a session. Reproduced every time on iOS 14, iPhone 8 Plus.
Also, video quality settings on iOS don't seem to make any difference whatsoever, neither on the bug nor on the output file size/quality.