Questions · Cameras
How many frames per second do I really need?
Far fewer than the default settings put in, except at a few points. To have a record of what happened in a corridor, a warehouse or an office, a few images per second are enough and the sequence is still perfectly understandable; the video looks a bit choppy and that takes no information away.
High frame rates are needed where the movement is fast and has to be frozen: a till where the movement of the hands matters, a gaming table, a production line, a lane cars go through. At those points, dropping the frame rate turns the video into a series of jumps and the detail you were after falls between two images.
It is worth not confusing this with the exposure time, which is what really decides whether a moving subject comes out sharp or smeared. You can record at many frames per second and have every one of them blurred because the shutter is slow to make up for the lack of light. In fast movement and low light you have to force a fast shutter and accept the darker image, or add light.
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