Frame rate

The number of whole pictures per unit time, usually frames per second, f/s or Hz. There is a wide range of frame rates used with modern media, typically from 23.976 to 60Hz. An even higher frame rate of 120Hz is included in ITU-R BT.2020 recommendation for UHD. This is because the large 4K and 8K video requires high frame rates to provide good smoothness of motion when looking at very big pictures.