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====== Ubuntu - Sound - Bitrate - Change Bitrate ======

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

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

<WRAP info>
**NOTE:** The bitrate is set to 192 kbps.
</WRAP>

----

===== 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 ====

<code bash>
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
</code>

<WRAP warning>
**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.
</WRAP>

----

==== Using mp3info ====

<code bash>
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
</code>

<WRAP info>
**NOTE:** This uses the **mp3info** command to determine the bitrate.

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

</WRAP>