#! /bin/bash
#
# Hacked by Claus Brod,
#   http://www.clausbrod.de/Blog/DefinePrivatePublic20090422SpeedingThroughTheCrisis
#
# prepare podcast for mp3 player:
#  - speed up by 15%
#  - split into small chunks of 5 minutes each
#
# requires:
#  - lame
#  - soundstretch
#  - mp3splt

if [ $# -ne 1 ]
then
  echo Usage: $0 mp3file >&2
  exit 2
fi

bn=`basename "$1"`
bn="${bn%.*}"

lame --priority 0 -S --decode "$1" - | \
  soundstretch stdin stdout -tempo=15 | \
  lame --priority 0 -S --vbr-new -V 9 - temp.mp3

mp3splt -q -f -t 05.00 -o "${bn}_@n" temp.mp3
rm temp.mp3