Convert PDF ebook for Kobo Touch

kobo.sh

#!/bin/bash

##### SETTINGS #####
WIDTH=600
HEIGHT=750

OUTDIR="./cbz"
OUTFILE="${1}.cbz"
####################

if [ $# -lt 1 ]; then
    echo "no input files."
    exit
fi

mkdir ${OUTDIR}

i=0

while true; do
    filename=`printf "%03d" $i`

    convert \
	\( -size ${WIDTH}x${HEIGHT} xc:white \) \
	\( \
    	  \( \
	-density 300x300 -type GrayScale \
	-define pdf:use-trimbox=true $1"[$i]" \
	-level 3%,90%,2.0 \
	  \) \
	-fuzz 70% -trim \
	-bordercolor '#ffffff' -border 3%x0% \
  	-density 96x96 -resize x${HEIGHT} \
	\) \
	-gravity center -composite \
	-type GrayScale -quality 90 \
	-verbose ${OUTDIR}/${filename}.jpg

    if [ $? != 0 ]; then
	break
    fi

    i=$[i + 1]

done

#pdftk ${OUTDIR}/*.pdf cat output out.pdf
zip -r $OUTFILE $OUTDIR

rm -r $OUTDIR