BitRate

is an option that specifies an approximate number of bits per second when creating video and audio files.

Details

BitRate specifies the approximate number of bits that are stored in a video file per second. Higher bit rate typically results in higher video or audio quality as well as larger file sizes.
The quality of a video is typically defined by its frame resolution and frame rate as well as the video and audio bit rates.
Typical settings for BitRate include:

	Automatic	automatically chosen
	val	the average number of bits per second
	{val_v,val_a}	bit rate separately specified for audio and video tracks
	<\|"Video"val_v,"Audio"val_a}	bit rate separately specified for audio and video tracks

Check the bit rate of an existing video:

Transcode the video into an MP4 file using the default bit rate:

Specify the approximate bit rate:

The file with smaller bit rate is typically smaller:

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