crunchjpgs.pl - Compress all JPG images in a PDF
crunchjpgs.pl [options] infile.pdf [outfile.pdf] Options: -j --justjpgs make script skip non-JPGs -q --quality select JPG output quality (default 50) -s --scale=num select a rescaling factor for the JPGs (default 100%) -m --scalemin=size don't scale JPGs smaller than this pixel size (width or height) -O --only=imnum only change the specified images (can be used mutliple times) -S --skip=imnum don't change the specified images (can be used mutliple times) -o --order preserve the internal PDF ordering for output --veryverbose increases the verbosity -v --verbose print diagnostic messages -h --help verbose help message -V --version print CAM::PDF version
The available values for --scale are:
1 100% 2 50% 4 25% 8 12.5%
imnum is a comma-separated list of integers indicating the images in order that they appear in the PDF. Use listimages.pl to retrieve the image numbers.
imnum
Requires the ImageMagick convert program to be available
Tweak all of the JPG images embedded in a PDF to reduce their size. This reduction can come from increasing the compression and/or rescaling the whole image. Various options give you full control over which images are altered.
CAM::PDF
listimages.pl
extractallimages.pl
extractjpgs.pl
uninlinepdfimages.pl
See CAM::PDF
To install CAM::PDF, copy and paste the appropriate command in to your terminal.
cpanm
cpanm CAM::PDF
CPAN shell
perl -MCPAN -e shell install CAM::PDF
For more information on module installation, please visit the detailed CPAN module installation guide.