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[bug-diffutils] bug#40018: How to diff PDF files?

From: Peng Yu
Subject: [bug-diffutils] bug#40018: How to diff PDF files?
Date: Tue, 10 Mar 2020 16:15:52 -0500


I'd like to diff PDF files.

$ seq 10 | gs -q -P- -dSAFER -dNOPAUSE -dBATCH -sDEVICE=pdfwrite
-dCompatibilityLevel=1.4 -sstdout=%stderr -sOutputFile=1.pdf -f -
$ pdftk 1.pdf output 2.pdf uncompress
$ diff {1,2}.pdf
Binary files 1.pdf and 2.pdf differ

Since PDF files contains both texts and binaries, just saying that
they are binary files and refusing to show the difference is not very
helpful. Is there a way for me to easily see the differences between
PDF files. Thanks.


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