I would like to use ghostscript (version 9.27) to batch compress big quantities of pdf files. The best option for me regarding compress ratio is -dPDFSETTINGS=/ebook, since it is able to reduce my files on average to about 40-50% of original size.
gs -sDEVICE=pdfwrite -dPDFSETTINGS=/ebook -dNOPAUSE -dQUIET -dBATCH -sOutputFile=compressed.pdf original.pdf
Problem is that black background appears behind some text in a compressed pdf and makes it unusable. Using -dPDFSETTINGS=/printer presets does not produce this black background effect but is not an option for me since it does not compress enough.
gs -sDEVICE=pdfwrite -dPDFSETTINGS=/printer -dNOPAUSE -dQUIET -dBATCH -sOutputFile=compressed.pdf original.pdf
I did a comparison between this settings thanks to this post and tried tweaking specific settings but with no luck. Thank you if anybody has an idea. I will try to generate a pdf without user sensitive information which I can append. For now, these are only snips of the part of the pdf document that gets "corrupted" during compression.
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