[Libav-user] bitrate for multi-channel audio

YIRAN LI mrfun.china at gmail.com
Mon Jan 15 01:58:53 EET 2018

Hi there,

According to this https://trac.ffmpeg.org/wiki/Encode/HighQualityAudio

*To calculate the bitrate to use for multi-channel audio: (bitrate for
stereo) x (channels / 2).Example for 5.1(6 channels) Vorbis audio: 128Kbps
x (6 / 2) = 384Kbps*

Is it true for every encoder that supports multi-channel?

Is it ture for every encoder to use just bitarte/2 when encoding to mono
(like mp3) ? Because when encoding to stereo mp3 jointely encode both
channels so that compression can be imporved so when it's down to one
channel, should the bitrate > bitrate / 2?

Thanks for help!
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