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== flac to mp3 == From [https://askubuntu.com/questions/385636/what-is-the-proper-way-to-convert-flac-files-to-320-kbit-sec-mp3 Ask Ubuntu] First of..."

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== flac to mp3 ==

From [https://askubuntu.com/questions/385636/what-is-the-proper-way-to-convert-flac-files-to-320-kbit-sec-mp3 Ask Ubuntu]

First of all you must make sure that it's installed.
<pre>sudo apt-get install libav-tools
</pre>

It should have lame and flac codecs, now is just create a bash script to finish the job:
<pre>cat > flac2mp3
</pre>

Here the shell will wait for your commands, copy and paste this:
<pre class="lang-bsh prettyprint prettyprinted" style="">#!/bin/bash
[[ $# == 0 ]] && set -- *.flac
for f; do
avconv -i "$f" -qscale:a 0 "${f[@]/%flac/mp3}"
done</pre>

Now press <kbd>Ctrl</kbd> + <kbd>D</kbd>. Make your script executable <code>chmod +x flac2mp3</code>. Now go you can use it like this:
<pre>./flac2mp3 /path/with/all/my/flacs/*.flac
</pre>

You can also copy the script to somewhere in your <code>PATH</code> and then <code>cd</code> to the directory with the flacs and execute it.

----

With regards to the following parameter used above:
<pre>-qscale:a 0
</pre>

will not actually give you a exact ''320k'' file, although it is probably the best setting to use anyway. The suggested settings actually give a target bitrate of 245 kbits/s with a range of 220-260. If you really wanted 320k mp3s you would have to go to CBR and use:
<pre>-c:a libmp3lame -b:a 320k
</pre>

but you would need great ears to notice the difference...

Reference:

*[https://wiki.archlinux.org/index.php/Convert_Flac_to_Mp3#With_FFmpeg https://wiki.archlinux.org/index.php/Convert_Flac_to_Mp3#With_FFmpeg]

== m4a to mp3 ==

Fuck me...

Copy the flac2mp3 script & just change "flac" to "m4a"

Seems to work just fine.

from [https://unix.stackexchange.com/questions/438927/convert-all-found-m4a-to-mp3 StackExchange]

(Doesn't actually work... but some ideas to think about in it...)
<pre>#!/bin/bash
## jc 2016
## convert [m4a mp3 wma] to mp3 128k
## [-vn] disable video recording
##
## avconv with lame mp3 plugin
## [-acodec libmp3lame]
##
## 192 k constant bitrate
## [-ab 192k]
## [-ab 128k]
##
## 44.1kHz sampling rate
## [-ar 44100]
##
## 2 channel audio
## [-ac 2]
##

## force the shell to do a case insensitive comparison
shopt -s nocasematch

working_directory="./mp3_converted"
# check if dir exist
if [ ! -d "$working_directory" ];
then
# dir does not exist
echo "convert directory does not exist $working_directory..."
`mkdir -p "$working_directory"`
echo "convert directory created $working_directory..."
fi

COUNT=0

for i in *; do

case $i in
*.mp3)
avconv -analyzeduration 999999999 -map_metadata 0 -i "$i" -vn -acodec libmp3lame -ac 2 -ab 128k -ar 44100 "$working_directory/`basename "$i" .mp3`.mp3"
echo $i
 ;;
*.m4a)
##avconv -analyzeduration 999999999 -map_metadata 0 -i "$i" -vn -acodec libmp3lame -ac 2 -ab 128k -ar 44100 "$working_directory/`basename "$i" .m4a`.mp3"
# adjusted for ffmpeg to test.
ffmpeg -i "$i" -n -acodec libmp3lame -ab 128k "$working_directory/`basename "$i" .m4a`.mp3"
echo $i
 ;;
*.wma)
avconv -analyzeduration 999999999 -map_metadata 0 -i "$i" -vn -acodec libmp3lame -ac 2 -ab 128k -ar 44100 "$working_directory/`basename "$i" .wma`.mp3"
echo $i
 ;;
*)
echo "other"
 ;;
esac

done

## back to normal comparison
shopt -u nocasematch
exit 0</pre>
</div>

Linux - Convert to mp3 - Revision history

Tinker: Created page with " == flac to mp3 == From [https://askubuntu.com/questions/385636/what-is-the-proper-way-to-convert-flac-files-to-320-kbit-sec-mp3 Ask Ubuntu] First of..."

Tinker: Created page with "
== flac to mp3 == From [https://askubuntu.com/questions/385636/what-is-the-proper-way-to-convert-flac-files-to-320-kbit-sec-mp3 Ask Ubuntu] First of..."