# What is a video bitrate ?

A video bitrate is the number of bit per unit of time that a video sends to the display buffer (and sound).

It's given in:

• bps - bits per second
• kbps - kilobps
• mbps - megabps

It may be parameter that you give to your video editing software as a target to determine the file size.

The lower the bitrate is:

• the more the software has to compress the video
• which leads to loss of information
• which makes the video quality worse.

## Formula

$$Bitrate = \frac{fileSize}{Duration}$$

Example: if the video file output of 200 MiB is desired for a movie of 10 minutes (600 seconds) long

The image bitrate is: $$\frac{(200 * 8192 )}{600} =~ 2730 \text{ kBit/s total bitrate}$$ The video bitrate is (with a 128kb/s desired audio bitrate) $$2730 - 128 = 2602 \text{ kBit/s video bitrate }$$

## Streaming

The max bitrate you can set it to when streaming is limited by: