Jochen Schulz wrote:
Florian Kulzer:
Unfortunately I do not know if a "naked" CUPS has the same handy
pdfwriter with the option to downsample images, and I could not find
any command line tool to do this.
apt-cache show cups-pdf
I didn't try it, but it should downsample to printing quality and then
make a new PDF out of it. pdf2ps and ps2pdf might also work.
J.
I have now figured out how to do it with ghostscript from the command
line (after first failing with the "-r" option). The command is:
gs -q -dBATCH -dNOPAUSE -sDEVICE=pdfwrite -dDownsampleColorImages=true
-dColorImageResolution=300 -sOutputFile=small.pdf big.pdf
The resolution is specified in DPI. For grayscale and monochrome images
you have to add "-dDownsampleGrayImages=true -dGrayImageResolution=..."
and "-dDownsampleMonoImages=true -dMonoImageResolution=...", respectively.
Regards,
Florian
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