I used the same settings as you Bo, did the trick I also changed some other settings, to improve the image for me. I had trouble with white objects in dark water.
ânopreview
âmode 5
âbitrate 15000000
âintra 1
âawb auto
âbrightness 50
âsaturation 10
âsharpness 15
âcontrast 15
-fl
âtimeout 0
âroi 0.02,0.0,0.9,0.94
âmetering matrix
âdrc med