4 weeks ago
if you mean the capture of photos during video, this is not available anymore I think from hero 6 or hero 7.
what I use is:
I usually I film at 4K
using GoPro app I save frames from videos as photos directly from my iPhone, even without downloading the video (just preview) ... or other post-processing apps.
because of the 4K (all sensor surface used or almost) the screenshots taken in this way have the quality of a photo.