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#!/usr/bin/env bash
#
# Copyright 2008-2014, Centova Technologies Inc.
#
# This script is used to re-encode MP3s to the specified parameters. Requires
# that lame be installed on your system.
#
# usage:
# reencode.sh bitrate samplerate channels filenames...
#
# change this if lame is not in your path
LAMEPATH=lame
SELFPATH=`dirname $0`
TMPDIR=$SELFPATH/vhosts/tmp
[ $# -lt 4 ] && echo "usage: $0 bitrate samplerate channels filenames..." && exit 1
HASLAME=`which $LAMEPATH`
[ -z "$HASLAME" ] && echo "Could not find lame encoder" && exit 1
BITRATE="$1"
shift
SAMPLERATE=`echo "$1" | awk '{print $1 / 1000}'`
shift
CHANNELS="$1"
shift
CHANARG=""
[ $CHANNELS -eq 1 ] && CHANARG="-a"
[ $CHANNELS -eq 2 ] && CHANARG="-m s"
rm -rf $TMPDIR
mkdir -p $TMPDIR
ID3PHP=$SELFPATH/../system/id3.php
while [ ! -z "$1" ]; do
rm -f $TMPDIR/_reencode_tmp.mp3
echo '#!/bin/sh' > $TMPDIR/_reencode_tmp.sh
php -q $ID3PHP "esc:'$LAMEPATH --tt '%title%' --ta '%artist%' --tl '%album%' --ty '%releaseyear%' --tg '%genre%' --mp3input -h $CHANARG -b $BITRATE --resample $SAMPLERATE '%filename%' $TMPDIR/_reencode_tmp.mp3" "$1" >> $TMPDIR/_reencode_tmp.sh
chmod a+x $TMPDIR/_reencode_tmp.sh
cat $TMPDIR/_reencode_tmp.sh
$TMPDIR/_reencode_tmp.sh
[ -f $TMPDIR/_reencode_tmp.mp3 ] && mv $TMPDIR/_reencode_tmp.mp3 "$1"
shift
done
rm -rf $TMPDIR