Video Essentials

Learn the Difference Between Frame Rate and Shutter Speed: Video 101


The following lesson was created by Vimeo for its Vimeo Video School. It’s used here with permission. Look for a new lesson each week.

In this day and age of constantly changing gear and technology, there’s a growing set of vocabulary that we video creators are all expected to learn. With so much jargon being thrown around, it can be easy to forget certain concepts or confuse them for other ones. A prime example of this is demonstrated by the confusion between frame rates and shutter speeds. Let’s taken a minute to clarify.

First, check out this video from –jL, which does an outstanding job explaining the difference between the two concepts:

Now let’s recap: Although frame rate and shutter speed are related, they are completely separate concepts.

Frame rate refers to the number of individual frames that comprise each second of video you record, also known as FPS (frames per second.) The most common frame rates in video are 24, 25 and 30 frames per second.

Shutter speed refers to the amount of time that each individual frame is exposed for. In video, the shutter speed you use will almost always be a fraction of a second. The number used in setting a camera’s shutter speed refers to the denominator of that fraction of a second. For example, if you set your camera’s shutter speed to 60, that means that each frame is being exposed for 1/60th of a second.

People often make the mistake of equating frame rate with shutter speed. In other words, some people determine that if they are shooting with a shutter speed of 1/100th of a second, that they are in turn shooting 100 frames per second. This is not the case. Depending on the camera you are using and the frame rate you have selected, you are probably shooting at either 24, 25 or 30 frames per second and exposing each individual frame for 1/100th of a second.

The shutter speed you choose can have a very noticeable effect on the style of your video, particularly when it comes to motion. A fast shutter speed such as 1/400th of a second will produce a series of crisp frames that have a choppy look when played back. A slow shutter speed such as 1/30th of a second, on the other hand, will produce a series of slightly blurred frames that have a smoother look when played back. As a rule of thumb, you want the denominator of your shutter speed to be approximately double the number of frames per second that you are recording. In other words, if you are recording at 30 frames per second, you want your shutter speed to be 1/60th of a second.

Ready for more? Learn the 180-degree rule or view more lessons at the Vimeo Video School.




Discussion

Comments for “Learn the Difference Between Frame Rate and Shutter Speed: Video 101”

  1. Well and truly bookmarked. Nice set of info here. Thanks. Just started making a short and need all the help I can get.

    Posted by DJH | January 6, 2012, 11:25 am
  2. Excellent explanation! I’ve worked with film a lot, as well as video, but have never heard anyone explain the difference between shutter and frame rates so clearly. Even DP’s that have been working with digital for a long time have had trouble explaining it to me. Great info! Thank you for putting together such a well said video! ^_^

    Posted by Kennedy | August 14, 2012, 5:30 pm

Post a comment