NAME

       jpegoptim - utility to optimize/compress JPEG/JFIF files.

SYNOPSIS

       jpegoptim [ options ] [ filenames ]

DESCRIPTION

       jpegoptim is used to optimize/compress jpeg files. Program supports lossless optimization, which is based
       on optimizing the Huffman tables. And so called "lossy" optimization  where  in  addition  to  optimizing
       Huffman tables user can specify upperlimit for image quality.

OPTIONS

       Options  may  be  either  the traditional POSIX one letter options, or the GNU style long options.  POSIX
       style options start with a single ``-'', while GNU long options start with ``--''.

       Options offered by jpegoptim are the following:

       -d<path>, --dest=<path>
             Sets alternative destination directory where to save optimized files (default is to  overwrite  the
             originals).  Please  note  that  unchanged  files won't be added to the destination directory. This
             means if the source file can't be compressed, no file will be created in the destination path.

       -f, --force
             Force optimization, even if the result would be larger than the original file.

       -h, --help
             Displays short usage information and exits.

       -m<quality>, --max=<quality>
             Sets the maximum image quality factor (disables lossless optimization mode,  which  is  by  default
             enabled).  This  option  will  reduce  quality  of  those source files that were saved using higher
             quality setting.  While files that already have lower quality setting will be compressed using  the
             lossless optimization method.

             Valid values for quality parameter are: 0 - 100

       -n, --noaction
             Don't really optimize files, just print results.

       -S<size>, --size=<size>
             Try  to optimize file to given size (disables lossless optimizaiont mode). Target size is specified
             either in kilobytes (1 - n) or as percentage (1% - 99%) of the original file size.

       -T<treshold>, --threshold=<treshold>
             Keep the file unchanged if the compression gain is lower than the threshold (%).

             Valid values for treshold are: 0 - 100

       -o, --overwrite
             Overwrite target file even if it exists (when using -d option).

       -p, --preserve
             Preserve file modification times.

       -q, --quiet
             Quiet mode.

       -t, --totals
             Print totals after processing all files.

       -v, --verbose
             Enables verbose mode (positively chatty).

       --all-normal
             Force all output files to be non-progressive. Can be used to convert all input files to progressive
             JPEGs when used with --force option.

       --all-progressive
             Force  all  output  files to be progressive. Can be used to convert all input files to normal (non-
             progressive) JPEGs when used with --force option.

       --strip-all
             Strip all (Comment & Exif) markers from output file. (NOTE! by default only Comment & Exif  markers
             are kept, everything else is discarded)

       --strip-com
             Strip Comment (COM) markers from output file.

       --strip-exif
             Strip EXIF markers from output file.

       --strip-iptc
             Strip IPTC markers from output file.

       --strip-icc
             Strip ICC profiles from output file.

BUGS

       When  using  --size option, resulting file is not always exactly the requested size. Workaround is to re-
       run jpegoptim on the same file again which often will result file closer to target size.

SEE ALSO

       jpeginfo(1)

AUTHOR

       Timo Kokkonen <tjko@iki.fi>

COPYING

       Copyright (C) 1996-2013  Timo Kokkonen

       This program is free software; you can redistribute it and/or modify  it  under  the  terms  of  the  GNU
       General  Public License as published by the Free Software Foundation; either version 2 of the License, or
       (at your option) any later version.
        This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;  without  even
       the  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
       License for more details.
        You should have received a copy of the GNU General Public License along with this program; if not, write
       to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.