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fd0/reduce_pdf_dpi.sh

Last active August 7, 2022 15:23
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reduce_pdf_dpi.sh
#!/bin/bash
shopt -s dotglob
# use bash strict mode
set -euo pipefail
IFS=$'\n\t'
DPI="${DPI:-120}"
if [[ "$#" != "2" ]]; then
echo "usage: $0 input.pdf output.pdf"
exit 2
fi
input="$1"
output="$2"
"gs" -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/ebook -dNOPAUSE -dQUIET -dBATCH \
"-sOutputFile=$output" \
"-dColorImageResolution=$DPI" "-dGrayImageResolution=$DPI" "-dMonoImageResolution=$DPI" "$input"
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