Cool - am on hero 4 - GP do use a high bitrate so let us know if that causes any issues in editing on low spec hardware/software. My 4 core lappy did not improve my editing experience much it's still choppy in real time play back although less crashing and better response times overall - I will have a look at editor you linked in the other thread.
For now I'm sticking to 1080p for ease of editing, smaller and more manageable file size and longer battery life. For bike night recording, I'm going to try:
ISO: 1600
Shutter: 1/50th second. I would prefer higher but with tests so far, it's pretty much unusable - however, a higher shutter speed could finally get properly exposed clear numberplates recorded, when they're illuminated by my bright headlights. Which is the ideal outcome for getting a better camera.
Sharpness: Low - sharpening on PC would be better. Sharpening noise in camera is self-defeating.
Exposure: Slightly lower - blown out regions like highly reflective numberplates illuminated by my bright headlights cannot be restored, best under-expose.
Video stabilisation: Off. It's useless at night and produces blurry frames as the camera enlarges, rotates and crops using internal gyro measurements. All action cameras I've seen are useless in this regard. The stabilisation process also relies on sharp images - fine in daylight, but with high ISO at night, all frames are too noise-infested and blurry.
The camera display is tiny, hardly readable to my eyes, but I do always carry a magnifying glass of the diffraction grating credit card sized type. I really don't want to lug around the tablet it does work on, simply to access and change camera settings, and for some reason it hates my OnePlus phone (may get a tiny tablet or try another phone).
It's likely footage will be trash at night no matter what I try. If I can snap number plates using some combination of settings which also reveal car make and model, that'll be a good result. It won't look terribly cinematic, but that's not the point.
My 4 core lappy did not improve my editing experience much it's still choppy in real time play back although less crashing and better response times overall
Make a note of the settings before changing in VLC - try changing the output to DirectX? If you're talking about choppy playback within the editor, there may be an assignable output module? If DirectX is available, it works better on lower powered hardware.
I will have a look at editor you linked in the other thread.
LosslessCut looks potentially useful to export short clips at original quality, for later use.