Created
January 10, 2020 16:59
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pdf compression script
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| #!/bin/sh | |
| # Sanity checks | |
| if ! [ -x "$(command -v gs)" ]; then | |
| echo "gs is not installed -> exit" | |
| exit 1 | |
| fi | |
| # Define some handy options to use with ghostscript | |
| export PDF2PDFFLAGS="-dCompatibilityLevel=1.5 -dPDFSETTINGS=/ebook -dPrinted=false -dColorConversionStrategy=/UseDeviceIndependentColor -dDownsampleColorImages=true -dDownsampleGrayImages=true -dDownsampleMonoImages=true -dMaxSubsetPct=100 -dSubsetFonts=true -dEmbedAllFonts=true -dOptimize=true -dUseFlateCompression=true -dNOPAUSE -dBATCH -sDEVICE=pdfwrite" | |
| # previsouly used: -dUseCIEColor=true | |
| # Get the initial file size | |
| init_size=$(du -h "$1" | cut -f1) | |
| # Get the file path without the file extension | |
| F=$1 | |
| F=${F%.*} | |
| # Load some handy pdfmarks to open the file as I like it | |
| pdfmarks=$(dirname "$0")/mktpdfmarks | |
| # Use gs to compress the file in a lossy fashion | |
| echo PDF lossy compression using: | |
| echo $PDF2PDFFLAGS -sOutputFile="$F-compressed.pdf" "$1" $pdfmarks | |
| gs $PDF2PDFFLAGS -sOutputFile="$F-compressed.pdf" "$1" $pdfmarks | |
| # pdftk is not maintained anymore and does not work on my mac... | |
| #echo pdftk $1 dump_data output /tmp/pdftk-report.txt | |
| #pdftk $1 dump_data output /tmp/pdftk-report.txt | |
| #echo pdftk /tmp/compressed.pdf update_info /tmp/pdftk-report.txt output $F-compressed.pdf | |
| #pdftk /tmp/compressed.pdf update_info /tmp/pdftk-report.txt output $F-compressed.pdf | |
| # Chrome has issues if exiftool is run last. Make sure smpdf comes afterwards | |
| if ! [ -x "$(command -v exiftool)" ]; then | |
| echo Could not find exiftool - Some tags might have been lost | |
| else | |
| # Restore some pdf tags that might have been lost in the process | |
| echo PDF tag transfer using: | |
| echo exiftool -overwrite_original -TagsFromFile "$1" "$F-compressed.pdf" | |
| exiftool -overwrite_original -TagsFromFile "$1" "$F-compressed.pdf" | |
| fi | |
| if ! [ -x "$(command -v smpdf)" ]; then | |
| echo Could not find smpdf - Skipping additional lossless compression | |
| echo See https://www.coherentpdf.com/compression.html | |
| else | |
| # Use smpdf to further compress the file in a lossless fashion | |
| echo PDF lossless compression using: | |
| echo smpdf "$F-compressed.pdf" -o "$F-compressed2.pdf" | |
| smpdf "$F-compressed.pdf" -o "$F-compressed2.pdf" | |
| mv "$F-compressed2.pdf" "$F-compressed.pdf" | |
| fi | |
| #if ! [ -x "$(command -v qpdf)" ]; then | |
| # echo Could not find qpdf - Skipping additional lossless compression | |
| #else | |
| # # Use qpdf to further compress the file | |
| # echo PDF lossless compression using: | |
| # echo qpdf --linearize --compress-streams=y --object-streams=generate "$F-compressed.pdf" "$F-compressed2.pdf" | |
| # qpdf --linearize --compress-streams=y --object-streams=generate "$F-compressed.pdf" "$F-compressed2.pdf" | |
| # mv "$F-compressed2.pdf" "$F-compressed.pdf" | |
| #fi | |
| if ! [ -x "$(command -v cpdf)" ]; then | |
| echo Could not find cpdf - Skipping additional annotation copying | |
| echo See https://www.coherentpdf.com/compression.html | |
| else | |
| # Use cpdf to copy information over | |
| echo PDF ID copy using: | |
| echo cpdf -copy-id-from "$1" "$F-compressed.pdf" -o "$F-compressed2.pdf" | |
| cpdf -copy-id-from "$1" "$F-compressed.pdf" -o "$F-compressed2.pdf" | |
| mv "$F-compressed2.pdf" "$F-compressed.pdf" | |
| if ! [ -x "$(command -v exiftool)" ]; then | |
| echo Could not find exiftool - Some tags might have been lost | |
| else | |
| # Restore producer and creator | |
| pdf_prod=$(exiftool -s3 -"Producer" "$1") | |
| echo Setting pdf producer to: "$pdf_prod" | |
| echo cpdf -set-producer "$pdf_prod" "$F-compressed.pdf" -o "$F-compressed2.pdf" | |
| cpdf -set-producer "$pdf_prod" "$F-compressed.pdf" -o "$F-compressed2.pdf" | |
| mv "$F-compressed2.pdf" "$F-compressed.pdf" | |
| pdf_creat=$(exiftool -s3 -"Creator" "$1") | |
| echo Setting pdf creator to: "$pdf_creat" | |
| echo cpdf -set-creator "$pdf_creat" "$F-compressed.pdf" -o "$F-compressed2.pdf" | |
| cpdf -set-creator "$pdf_creat" "$F-compressed.pdf" -o "$F-compressed2.pdf" | |
| mv "$F-compressed2.pdf" "$F-compressed.pdf" | |
| fi | |
| echo PDF annotation copy using: | |
| echo cpdf -copy-annotations "$1" "$F-compressed.pdf" -o "$F-compressed2.pdf" | |
| cpdf -copy-annotations "$1" "$F-compressed.pdf" -o "$F-compressed2.pdf" | |
| mv "$F-compressed2.pdf" "$F-compressed.pdf" | |
| fi | |
| # Get the new file size | |
| new_size=$(du -h "$F-compressed.pdf" | cut -f1) | |
| echo "\nCompressed from $init_size to $new_size" |
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| [/PageMode /UseOutlines % /UseNone /UserOutlines /UseThumbs /FullScreen | |
| /DOCVIEW pdfmark |
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