Frame Rate is simply how many frames are captured in a second.
So what can you do with shutter speed creatively?
High shutter speeds are often used in action shots to accentuate motion. Looks like this:
Higher shutter speeds lend a ‘staccato’ appearance to moving images, so it’s quite common to leave your shutter at the standard 1/48 of a second. Think Saving Private Ryan or Sherlock fight scenes. It feels a bit hyperreal and agitated. Stop motion videos often suffer from the same problem since each individual frame is taken without movement. There are tools for adding motion blur in post. BlackMagic Resolve and Fusion have these tools built in and they work pretty well. If you’re using Adobe applications, ReVisionFX makes a great plugin called Reel Smart Motion Blur which does the same thing. Computer generated imagery is easier to add motion blur to since the computer already knows the motion of the subject and no “motion vectors” have to be calculated. In After Effects or Fusion, this is what the motion blur toggle is using. It works great for motion graphics. 3D applications also rely on adding motion blur after the render where it’s much faster and more controllable.
The Hobbit notoriously shot at 48 frames per second, but what about shutter speed? Peter himself has the answer: a 270º shutter angle. That equates to a 1/64 of a second shutter speed at 48 frames per second. But as far as motion blur is concerned, that’s still 1/64th of a second motion blur, even when projected at 24 frames per second (135º at 24 fps). Notice that they didn’t shoot the whole thing at 1/96 due to the “double the frame rate to determine shutter” idea. Instead, they went with something close enough to the ‘standard’ motion blur of 24fps 1/48 that nobody would really notice. The increasing “temporal resolution” of more frames certainly made pans smoother, but it also made the whole thing more “realistic” which wasn’t universally appreciated. This has more to do with frame rate than shutter speed though.
See the “Shutter” section for a look at how shutter speed affects your exposure.