Image optimization and compression tool for the console. This tool optimizes PNG, JPEG and GIF files, using gifsicle, jpegoptim, jpegtran, pngcrush and pngout and can usually reduce the filesize by 10% to 70%.
As optimzing images is CPU intensive and it may take several minutes for a larger PNG file, image-optimizer keeps track of which image files it has optimized. Each image file will only be optimize once, unless the --force flag is set.
image-optimizer is intended to be run unattended in a cronjob.
image-optimizer --path="/path/to/images"
image-optimizer --path="/path/to/images" --force
image-optimizer --path="/path/to/images" --index-only
Installation is via composer:
cd ~/install-path
composer create-project jonathanmaron/image-optimizer
It is recommended to include ~/bin in your PATH variable:
PATH=$PATH:~/install-path/image-optimizer/bin
so that image-optimizer is available to the logged in user globally.
Between v1 and v3, the structure of the history directory was updated. Therefore, please remove your current history directory. A new one, with the new structure, will be created when image-optimizer is executed for the first time:
rm -fr ~/.image_optimizer
image-optimizer depends upon gifsicle, jpegoptim, jpegtran, pngcrush and pngout to perform its work. These tools must be installed, otherwise image-optimizer will return an error.
Download and install pngout at:
http://static.jonof.id.au/dl/kenutils/pngout-20150319-linux-static.tar.gz (or newer)
then unpack, then copy to:
/usr/bin/pngout
Download and install other dependencies:
apt install pngcrush libjpeg-progs jpegoptim gifsicle