Convertir PDF a CBZ

# 1 - pasar de PDF a ficheros JPEG (150ppp)
gs -dNOPAUSE -sDEVICE=jpeg -dFirstPage=1 -sOutputFile=page%d.jpg -dJPEGQ=100 -r150 -q input.pdf -c quit
# 2 - ajustar la numeración a 3 digitos
for f in $(ls page??.jpg); do mv $f $(echo $f | sed 's_page\(.*\).jpg_page0\1.jpg_g'); done
for f in $(ls page?.jpg); do mv $f $(echo $f | sed 's_page\(.*\).jpg_page00\1.jpg_g'); done
# 3 - generar CBZ
zip final.cbz page*.jpg