Hello,
I did find the teensy4.0 pdf... and unfortunately, not all the pins are available for camera HW assist :-(
It seems that it would be possible with the teensy4.1... Hallas, they are not available (at least at an OK price) in France... (they are >$40 while the 4.0 is 25€)...
Well, I will start with SW and move to HW if the project works and I need to make it better!
Cyrille