Compress PDF Files Effectively in Ubuntu

Found a great script that does an amazing job with compressing PDF files whilst maintaining a good quality:

Get the script from here: http://www.alfredklomp.com/programming/shrinkpdf/

Just copy the script to a text file and make it executable, then run:

./shrinkpdf infile.pdf outfile.pdf

It compressed 3 PDF files from 80 MB to 13 MB!

Enjoy!

About SoCRaT

Research Support and Infrastructure Engineer, OSS & Linux Geek
This entry was posted in Linux, Uncategorized and tagged , . Bookmark the permalink.

One Response to Compress PDF Files Effectively in Ubuntu

  1. SoCRaT says:

    A copy of the script:

    #!/bin/sh

    # http://www.alfredklomp.com/programming/shrinkpdf
    # Licensed under the 3-clause BSD license:
    #
    # Copyright (c) 2014, Alfred Klomp
    # All rights reserved.
    #
    # Redistribution and use in source and binary forms, with or without
    # modification, are permitted provided that the following conditions are met:
    # 1. Redistributions of source code must retain the above copyright notice,
    # this list of conditions and the following disclaimer.
    # 2. Redistributions in binary form must reproduce the above copyright notice,
    # this list of conditions and the following disclaimer in the documentation
    # and/or other materials provided with the distribution.
    # 3. Neither the name of the copyright holder nor the names of its contributors
    # may be used to endorse or promote products derived from this software
    # without specific prior written permission.
    #
    # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS”
    # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
    # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    # POSSIBILITY OF SUCH DAMAGE.

    shrink ()
    {
    gs \
    -q -dNOPAUSE -dBATCH -dSAFER \
    -sDEVICE=pdfwrite \
    -dCompatibilityLevel=1.3 \
    -dPDFSETTINGS=/screen \
    -dEmbedAllFonts=true \
    -dSubsetFonts=true \
    -dAutoRotatePages=/None \
    -dColorImageDownsampleType=/Bicubic \
    -dColorImageResolution=$3 \
    -dGrayImageDownsampleType=/Bicubic \
    -dGrayImageResolution=$3 \
    -dMonoImageDownsampleType=/Bicubic \
    -dMonoImageResolution=$3 \
    -sOutputFile=”$2″ \
    “$1”
    }

    check_smaller ()
    {
    # If $1 and $2 are regular files, we can compare file sizes to
    # see if we succeeded in shrinking. If not, we copy $1 over $2:
    if [ ! -f “$1” -o ! -f “$2” ]; then
    return 0;
    fi
    ISIZE=”$(echo $(wc -c “$1″) | cut -f1 -d\ )”
    OSIZE=”$(echo $(wc -c “$2″) | cut -f1 -d\ )”
    if [ “$ISIZE” -lt “$OSIZE” ]; then
    echo “Input smaller than output, doing straight copy” >&2
    cp “$1” “$2”
    fi
    }

    usage ()
    {
    echo “Reduces PDF filesize by lossy recompressing with Ghostscript.”
    echo “Not guaranteed to succeed, but usually works.”
    echo ” Usage: $1 infile [outfile] [resolution_in_dpi]”
    }

    IFILE=”$1″

    # Need an input file:
    if [ -z “$IFILE” ]; then
    usage “$0”
    exit 1
    fi

    # Output filename defaults to “-” (stdout) unless given:
    if [ ! -z “$2″ ]; then
    OFILE=”$2″
    else
    OFILE=”-”
    fi

    # Output resolution defaults to 72 unless given:
    if [ ! -z “$3″ ]; then
    res=”$3″
    else
    res=”72”
    fi

    shrink “$IFILE” “$OFILE” “$res” || exit $?

    check_smaller “$IFILE” “$OFILE”

    Like

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