What is Frame Rate?
Also known as frame frequency, the Frame Rate is the frequency at which consecutive images called frames, are displayed per second. This is usually represented in Hertz (Hz). This applies both in the case of films, video cameras, and computer graphics.
On average, a human eye will consider anything that is above 20 frames per second as a moving image.
Silent era and Frame Rate
During the 1880s when videos had just been introduced, the frame rate was from 16 to 24 fps (frames per second), but Edison suggested that anything that is less than 46 fps can cause strain to the eye.
In the 1920s, the frame rate was increased to between 20 and 26 fps by the Lumiere brothers.
Sound films and Frame Rate
When sound was introduced in the industry, people were more sensitized towards audio frequency and variations in film speed were no longer tolerated. Therefore, 24 fps was made a standard for a 35mm sound film.
Modern videos and Frame Rate
Movies in general now used 24 to 26 frames per second. Even though with the technology that makes us capable of higher frame rates, people are habituated to 24 fps. The look and feel of the movie will impact on the factor of realism.
Since 24fps is generally how we see the world it gives us a very realistic feel.
When it comes to video games, the frame rate is 60fps. Anything less can make a person queasy.