$ gs -dNOPAUSE -sDEVICE=pdfwrite -dPDFSETTINGS=/screen -sOUTPUTFILE=reduced.pdf -dBATCH toolarge.pdf
screen, ebook, printer, prepress
El documento original está disponible en https://clustercien.udea.edu.co/web/tiki-index.php?page=GhostScript