#!/bin/sh#we assume two things, that you're already using mp2 audio and that want it#and also that where ever mktemp creates the files will have enough free space to do this#and also the settings that you'll want to encode the mp2 audio at#i should really check to see if you have the tools needed to make everything#and that ALL files are sucessfully created before removing the original file (edit the script if you just want to move it out of the way to .old or something)REQUANTFACTOR = 10MPLEXFORMAT = 8IN=$1NEW=$1.newTMP=`mktemp -t reqXXXXXX`mpgdemux $IN -b $TMPtcrequant -f $REQUANTFACTOR -i $TMP-0.m2v -o $TMP-1.m2vlame --decode $TMP-0.mp2 - | toolame -b 112 -s 48 - $TMP-1.mp2mplex -f $MPLEXFORMAT -o $NEW $TMP-1.mp2 $TMP-1.m2v && (rm -f $IN; mv $NEW $IN)rm -f $TMP $TMP-*