frame rate
frame rate

"Frame rate measures how many still images appear on the screen over the span of one second, indicating how smooth the video looks. [...] A high frame rate also increases the bitrate -- unrelated to the level of compression -- because of the data required to store the additional frames. Televisions with motion interpolation can automatically increase the frame rate of a video at the time of playback, but doing so can cause the "soap opera effect" when the video appears abnormally smooth. [...] Unlike bitrate, video has standardized frame rates. In the United States, most movies run at 24 frames per second, while most TV programs follow the NTSC standard, playing back at about 30fps. In areas that use the PAL standard, such as many countries in Europe, TV video plays at 25fps instead. There are exceptions, however: in 2012, "The Hobbit" played in some theaters at 48fps, reducing blurring, but causing some viewers to find the video unsettling due to its departure from the normal rate of animation."

"More dynamic content requires higher bitrates to have good quality, so you will need a higher bitrate to stream sporting events or video game competitions as opposed to speakers giving presentations at a conference or commencement ceremonies.

The encoded frame rate also affects the required bitrate. When streaming sports you could encode a 60 frames per second (fps) stream at 1080p60 or 720p60; for lower motion events like lectures or conferences, encoding and sending 60 fps may not provide a visible benefit, but requires significantly more bandwidth than streaming at the more common 30 fps. Not all online streaming platforms can accept a 60 fps stream, and not all viewers can handle receiving 60 fps, so be sure to take that into consideration."

make sure to shoot, edit and upload video in the same frame rate so that no data (frames) are lost throughout the process

"usually written as FPS or frames per second."

"In North America, parts of South America and Japan, frame rates of 29.97 (30) FPS and 59.94 (60) FPS respectively are used, also known as NTSC. In most of Europe, and other countries, 25 FPS or 50 FPS are used, also known as PAL. There is yet another, lesser used standard called SECAM that a few countries like Russia, France and some African countries still use, that is also 25 FPS or 50 FPS."

Emory Shaw

Source: fpsillustration.png