Tuesday, September 17, 2019

Frame Rate

Frame rate, when concerning photography, is the amount of individual video frames that the camera captures, per second. Frame rate comes in a few different standards (expressed as frames per second or fps): 24fps, 25fps, 30fps, 60fps, and 120fps. Frame rate stems from the very first silent films. Film would first be placed on a reel, and then cranked by hand by a camera operator, after which the projectionist would playback the film at the same frame rate that it was recorded at. Due to this, frame rate can be thought of as flip books, with each new drawing on a piece of paper representing a frame. When one flips through, they can see all of the frames blended together as one continuous moving image. With that in mind, if one has a frame rate of 24fps, in one second, the camera is capturing 24 individual frames, and when played back, it displays as just one continuous video.

No frame rate can necessarily be considered the best. This is because each one has its own specific use case. For video on the Internet and film, 24fps is the standard, due to this frame rate being the most cinematic, and appearing the most natural to the human eye. For live television, sports, and soap operas, 30fps is common. 30fps has six more frames per second than 24fps, giving it a smoother feel that works well for live television, but is less cinematic. 60fps, 120fps, and higher frame rates are generally used for recording video to be played back in slow motion.

Any frame rate at 60fps or above is considered a high-speed frame rate. For example, 60fps, 120fps, and 240fps would all be considered high-speed and are typically used for slow motion video. Some cameras can even go as fast as 1,000 frames per second, and are capable of perfectly capturing extremely fast events in high detail, such as balloons bursting and bullets travelling through the air after being fired.

https://wistia.com/learn/production/what-is-frame-rate

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