Many thanks again for your advice ... I just matched the GoPro video to the iPhone 11 max settings and I had no problem overlaying the video and now seeing the data on the screen!

Please make sure the GoPro video you try to overlay uses a standard encoding and format. HEROs come with so many bells and whistles, it is easy to select something your iPhone can display, but will fail to generate a new video based on the non-standard input. For existing GoPro video, you may want ...

Hi,

I have read the previous posts / threads with regard to ‘No data overlay in exported video, however my problem is a little different to those previously described.

For reference I am using v25.01 (current), iPhone 11 w/ios26 & GoPro Hero 7.

I use LapTimer to record the video in SD on the ...