Script -- Transencode Flac to Mp3 + tag rewrite

# ./flac2mp3.sh
No Source Dir given Please specify the full path to the source flac file

#!/bin/bash
#
# Desc :- Script will convert flac to mp3
#         Will pull flac tags into mp3 as ID3v2 tags
# Version :- 1.0.0
# Date :- 1-02-09
# Author :- undersys
# Dependencies :- lame-3.98.2, flac-1.2.1-r3, mp3gain-1.4.6-r2
#

# -------------------
# Set Global Config
# -------------------
#
# Only change seven settings below
#

# Set the base dir to write mp3s to, artist and album structure will be build under this
BASEDIR=/store/mp3

# Set who should own the files at the end
REALUSR=samba

# Set group to own files/folders
REALGRP=users

# Set path to lame binary
LAME=/usr/bin/lame

# Set path to flac binary
FLAC=/usr/bin/flac

# Set path to metaflac, part of flac
METAFLAC=/usr/bin/metaflac

# Set path to mp3gain binary
MP3GAIN=/usr/bin/mp3gain

# -------------------
# End Global Config
# -------------------

# -------------------
# Set Global Vars
# -------------------

# Must check for valid input first, befour we set any Global Vars
if [[ -z $1 ]]; then
        echo No Source Dir given
        echo Please specify the full path to the source flac files
        exit
fi

# Name of the file that holds file list
FLIST=flist.out

# Name of tags file
TAGSFILE=tags.out

# Find total coloums in input path
MAXCOL=`echo $1 | awk -F/ '{print NF}'`

# Select Album coloum
ALCOL=$(($MAXCOL - 1))

# Selet Artist coloum
ARCOL=$(($MAXCOL - 2))

# Select artist name from full path
ARTIST=`echo $1 | awk -F/ '{print $v1}' v1=$ARCOL`

# Select album name from full path
ALBUM=`echo $1 | awk -F/ '{print $v1}' v1=$ALCOL`

# Set source dir from input
SOURCEDIR=$1

# create a list of .flac files and write to file
FILES=`find $1 -name "*.flac" >$FLIST`

# ------------------
# End Global Vars
# ------------------

# --------------------
# Start Function Block
# --------------------

function cdir {
        if [[ -d $BASEDIR/$ARTIST/$ALBUM ]]; then
                echo This Album Has been encoded
                echo Script will now exit
                exit
        fi

        mkdir -p $BASEDIR/$ARTIST/$ALBUM
        }

function transcode {
        cp flist.out $BASEDIR/$ARTIST/$ALBUM/$FLIST
        cd $BASEDIR/$ARTIST/$ALBUM
        cat $BASEDIR/$ARTIST/$ALBUM/flist.out | while read line; do
        $METAFLAC --no-utf8-convert --export-tags-to=- ${line} | sed 's/=\(.*\)/="\1"/' >$TAGSFILE
        . ./$TAGSFILE
        FLACN=`echo ${line} | awk -F/ '{print$NF}'`
        MP3N=`echo $FLACN | sed 's/\..\{4\}$//'`
        $FLAC -d -c ${line} | $LAME -V3 --vbr-new \
        --tt "$TITLE" \
        --tn "$TRACKNUMBER" \
        --tg "$GENRE" \
        --ty "$DATE" \
        --tc "$COMMENT" \
        --ta "$ARTIST" \
        --tl "$ALBUM" \
        --add-id3v2 \
        - $MP3N.mp3
        done
       }

function replaygain {
        $MP3GAIN  -k -p -s r  $BASEDIR/$ARTIST/$ALBUM/*
        }

function setperms {
        chown -R "$REALUSR:$REALGRP" $BASEDIR/$ARTIST/$ALBUM
        chmod -R 774 $BASEDIR/$ARTIST/$ALBUM
        }

function clearvars {
        cat $BASEDIR/$ARTIST/$ALBUM/$TAGSFILE | while read line;
        do
        TAG=`echo "${line}" | awk -F= '{print $1}'` | unset $TAG
        done
        rm $BASEDIR/$ARTIST/$ALBUM/$TAGSFILE
        rm $BASEDIR/$ARTIST/$ALBUM/$FLIST
       }

# --------------------
# End Function Block
# --------------------

# --------------------
# main section
# --------------------

cdir
transcode
replaygain
setperms
clearvars

exit

# --------------------
# End main section
# --------------------

# -------------------
# End Script
# -------------------