#!/bin/bash

if [ $# -ne 2 ]; then
  echo "$0 in.pdf out.pdf"
  exit 1
fi
if ! which pdftoppm tiffcp tiff2pdf >/dev/null; then
  echo "sudo apt-get install poppler-utils libtiff-tools"
  exit 1
fi
TDIR=$(mktemp -d)
trap "{ rm -rf $TDIR; }" EXIT
pdftoppm -tiff "$1" $TDIR/p
tiffcp $TDIR/p* $TDIR/all.tiff
tiff2pdf $TDIR/all.tiff -z -o "$2"