ubuntu:sound:bitrate:change_bitrate

Table of Contents

Ubuntu - Sound - Bitrate - Change Bitrate
- Convert MP3 files in all sub-directories to a different bitrate
- Convert MP3 files in all sub-directories to a different bitrate, but only if they have bitrates above a specific value
  - Using only built in Bash functions
  - Using mp3info

Ubuntu - Sound - Bitrate - Change Bitrate

Convert MP3 files in all sub-directories to a different bitrate

find . -type f -name "*.mp3" -print0 | while IFS= read -r -d '' file; do echo "$file"; lame -b 192 "$file" "${file%.*}".192.mp3; done

NOTE: The bitrate is set to 192 kbps.

Convert MP3 files in all sub-directories to a different bitrate, but only if they have bitrates above a specific value

Using only built in Bash functions

find . -type f -name "*.mp3" -print0 | while IFS= read -r -d '' file; do echo "$file"; [[ $(file "$file" | sed 's/.*, \(.*\)kbps.*/\1/' | tr -d " ") -gt 192 ]] && lame -b 192 "$file" "${file%.*}".192.mp3 && mv "${file%.*}".192.mp3 "$file"; done

WARNING: This uses the file command to determine the bitrate.

Unfortunately, sometimes the file command does not return the bitrate and returns something like Audio file with ID3 version 2.3.0.
For these files, the $(file “$file” | sed 's/.*, \(.*\)kbps.*/\1/' | tr -d “ ”) part will not work.

The bitrate is set to 192 kbps for any file that has a bitrate above 192 kbps.

Using mp3info

find . -type f -name "*.mp3" -print0 | while IFS= read -r -d '' file; do echo "$file"; [[ $(mp3info -r m -p "%r" "$file") -gt 192 ]] && lame -b 192 "$file" "${file%.*}".192.mp3 && mv "${file%.*}".192.mp3 "$file"; done

NOTE: This uses the mp3info command to determine the bitrate.

This mp3info command needs to be installed with sudo apt install mp3info.

ubuntu/sound/bitrate/change_bitrate.txt · Last modified: 2022/09/19 11:11 by peter