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No idea about the war that seems to be ongoing above, but there's accuracy in pjanywhere's statement. Changing the FPS doesn't necessarily do anything to create a shorter exposure. Especially in the land of GoPro where they don't have an adjustable aperture to help regulate exposure.

If a given scene calls for iso 100 and a shutter speed of 1/500th to get proper exposure, it will call for that regardless of whether the recording is being done at 30 or 60fps.

If there isn't some sorta light reduction (nd filter, low light scene) then shutter speeds are likely quite high and safe from being impacted in any way by the recording framerate being used.
 

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No idea about the war that seems to be ongoing above, but there's accuracy in pjanywhere's statement. Changing the FPS doesn't necessarily do anything to create a shorter exposure. Especially in the land of GoPro where they don't have an adjustable aperture to help regulate exposure.

If a given scene calls for iso 100 and a shutter speed of 1/500th to get proper exposure, it will call for that regardless of whether the recording is being done at 30 or 60fps.

If there isn't some sorta light reduction (nd filter, low light scene) then shutter speeds are likely quite high and safe from being impacted in any way by the recording framerate being used.
I haven't seen the war, so can't say much about that.

But about the fps/shutter speed, a lower shutter speed (that is usually undesired) may have these two benefits over high shutter:
1. Smoother transition between frames - this is huge advantage, as the footage becomes more fluid and less stroboscopic;
2. For the reason above, a slightly higher compression can be achieved - This is marginal, but since the footage is more blurry, less artifact is seen.
 
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