export_pdf.sh

#!/bin/bash

for FILE in "$@"
do
  echo $FILE
  NAME=$(basename "$FILE" | cut -d . -f1)
  PAGES=`pdfinfo "$FILE" | grep Pages | grep -P '\d+' -o`
  mkdir -p "$NAME"
  seq 1 $PAGES | parallel pdftoppm -f {} -l {} -aa yes -r 400 -png "$(printf "%q" "$FILE")" "$(printf "%q/img" "$NAME")"
  find $NAME -type f -name "*.png" | parallel optipng -o4 {}
done

export_pdf_mac.sh

#!/bin/bash

for FILE in "$@"
do
  echo $FILE
  NAME=$(basename "$FILE" | cut -d . -f1)
  PAGES=`pdfinfo "$FILE" | grep Pages | grep -E '\d+' -o`
  mkdir -p "$NAME"
  seq 1 $PAGES | parallel pdftoppm -f {} -l {} -aa yes -r 300 -jpeg -jpegopt quality=90,optimize=y "$(printf "%q" "$FILE")" "$(printf "%q/img" "$NAME")"
done