Thanks for the video link, Davide DB. Will check it out.
Mark answered my question on YT how to get the Gopro into REC2020 wide gamut color space (for HDR).
Here it is :
I guess I have to type oMWIDE=2020 ?
Thank you, Davide DB.
Unfortunately, when I point my GoPro to the QR code, I get the message "QRCode non-GoPro".
Can it be that some codes only work with certain GoPro models like the 11 Mini ?