BitRate

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:
  • Automaticautomatically chosen
    valthe average number of bits per second
    {valv,vala}bit rate separately specified for audio and video tracks
    <|"Video"valv,"Audio"vala}bit rate separately specified for audio and video tracks
  • Typical video bit rate ranges for H.264, HEVC and VP9 codecs are:
  • 2160p40-60 Mbps for 30 fps, 50-80 Mbps for 60 fps
    1080p8-10 Mbps for 30 fps, 12-15 Mbps for 60 fps
    720p5-6.5 Mbps for 30 fps, 7.5-9.5 Mbps for 60 fps
  • Typical audio bit rates are:
  • mono128 Kbps
    stereo384 Kbps
    5.1512 Kbps

Examples

Basic Examples  (1)

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:

Wolfram Research (2021), BitRate, Wolfram Language function, https://reference.wolfram.com/language/ref/BitRate.html.

Text

Wolfram Research (2021), BitRate, Wolfram Language function, https://reference.wolfram.com/language/ref/BitRate.html.

CMS

Wolfram Language. 2021. "BitRate." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/BitRate.html.

APA

Wolfram Language. (2021). BitRate. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/BitRate.html

BibTeX

@misc{reference.wolfram_2025_bitrate, author="Wolfram Research", title="{BitRate}", year="2021", howpublished="\url{https://reference.wolfram.com/language/ref/BitRate.html}", note=[Accessed: 17-July-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_bitrate, organization={Wolfram Research}, title={BitRate}, year={2021}, url={https://reference.wolfram.com/language/ref/BitRate.html}, note=[Accessed: 17-July-2025 ]}