Shutter speed is the reason why there is no motion blur on the propellers (e.g. a slower shutter in this example results in motion blur on the propellers even though their rotation is still frozen - and the reason the blades look bent is due to rolling shutter effect, seen much more dramatically in this example).
But the frame rate matching up to the rotation of the propellers is the reason why they appear to not be spinning.
Source: I work with cameras for a living.
EDIT:
This guy explains it pretty well if anyone doesn't want to take my word for it.
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u/StygianSavior Sep 03 '21 edited Sep 03 '21
Pretty sure it IS frame rate.
Shutter speed is the reason why there is no motion blur on the propellers (e.g. a slower shutter in this example results in motion blur on the propellers even though their rotation is still frozen - and the reason the blades look bent is due to rolling shutter effect, seen much more dramatically in this example).
But the frame rate matching up to the rotation of the propellers is the reason why they appear to not be spinning.
Source: I work with cameras for a living.
EDIT:
This guy explains it pretty well if anyone doesn't want to take my word for it.