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How To: Easily Convert FLAC audio to MP3s in Linux

r3dux | September 16, 2009

I grabbed a bunch of FLAC files the other day, and as nice as they sound, I don’t think ~30-40MB per track is acceptable, so I did a bit of research and stumbled across this great post on LinuxTutorialBlog.

Turns out there’s a dead simple GUI based tool called SoundConverter – which really is as simple as pointing it at a directory and configuring your transcoding preferences (mp3, ogg, file-naming etc). A swift sudo apt-get install soundcoverter and a couple of clicks later and the job’s done.

SoundConverter1SoundConverter2

If you really want a bash method, there’s a bunch of scripts and links in tfa, such as this one by Octavio Ruiz :

#!/bin/bash
#
# Copyright 2008 Octavio Ruiz
# Distributed under the terms of the GNU General Public License v3
# $Header: $
#
# Yet Another FLAC to MP3 script
#
# Author:
# Octavio Ruiz (Ta^3) <tacvbo@tacvbo.net>
# Modification/Fixage:
# r3dux
# Thanks:
# Those comments at:
# http://www.linuxtutorialblog.com/post/solution-converting-flac-to-mp3
# WebPage:
# https://github.com/tacvbo/yaflac2mp3/tree
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY. YOU USE AT YOUR OWN RISK. THE AUTHOR
# WILL NOT BE LIABLE FOR DATA LOSS, DAMAGES, LOSS OF PROFITS OR ANY
# OTHER KIND OF LOSS WHILE USING OR MISUSING THIS SOFTWARE.
# See the GNU General Public License for more details.
 
LAME_OPTS="-V 0 -q 0 --vbr-new"
 
id3v2=$(which id3v2)
old_IFS=${IFS}
IFS=''
files=( `find . -type f -name '*flac'` )
 
for N_files in ${!files[@]}
do
vars=( `metaflac --no-utf8-convert --export-tags-to=- "${files[${N_files}]}"` )
 
for N_vars in ${!vars[@]}
do
    export "$(echo "${vars[${N_vars}]%=*}" | tr [:upper:] [:lower:])=${vars[${N_vars}]#*=}"
done
 
flac -dc "${files[${N_files}]}" |\
    lame ${LAME_OPTS} --ignore-tag-errors --add-id3v2 \
        ${artist:+--ta} ${artist} \
        ${tracknumber:+--tn} ${tracknumber} \
        ${title:+--tt} ${title} \
        ${album:+--tl} ${album} \
        ${date:+--ty} ${date} \
        ${genre:+--tg} ${genre} \
        ${comment:+--tc} ${comment} \
        - "${files[${N_files}]/\.flac/.mp3}"
 
    [[ -x ${id3v2} ]] && ${id3v2} \
        ${artist:+--artist} ${artist} \
        ${tracknumber:+--track} ${tracknumber} \
        ${title:+--song} ${title} \
        ${album:+--album} ${album} \
        ${date:+--year} ${date} \
        ${genre:+--genre} ${genre} \
        ${comment:+--comment} ${comment} \
        "${files[${N_files}]/\.flac/.mp3}"
 
done
IFS=${old_IFS}

I’ve modded the LAME_OPTS line in the above script to use the -q 0 switch in lame (so it uses the highest quality algorithm it can), and changed the order of when the ${LAME_OPTS) options are passed to lame, which results in them actually being honoured. Which is nice. Should you have any specific encoding goals, you can always browse through the lame switches and mod it to your hearts content.

Sweet like chocolate =D

Note: To run the above script, just copy & paste into a file, maybe flac2mp3.sh or something, then chmod +x flac2mp3.sh to make it executable and run it on a folder like flac2mp3.sh MyFolderOfFLACFiles.

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Categories
How-To, Linux, Music
Tags
Audio, Bash, Conversion, FLAC, Formats, How-To, mp3, ogg, script, SoundConverter
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