All videos have been processed in a similar manner with a proven set of tools. The Runcam5 has a 145º field of view causing significant fisheye distortion of the 4K footage. In most cases this problem has been overcome by filming a sea horizon and then finding optimum correction factors in ShotCut that make this horizon flat.
Using these factors, ShotCut is used to correct lens distortion, then apply modest sharpening and improve colour saturation in cases where an image is muted, for example in evening light. From ShotCut the optimised footage is exported as an 1920×1080 HD file to OpenShot where the videos you see here are finally compiled.