Comments on How to decrease image size from commandline
Parent
How to decrease image size from commandline
Problem
I'd like to be able to decrease images, particularly jpg and png's, either to a percentage of the original file, or a specified size in bytes.
MWE
decrease --size=900KB -o image_small.png image.png
decrease --size=90% -o image_small.png image.png
Notes
It can be two separate tools, but I want them to support both options,
and ideally, follow proper Unix option dash conventions (--out=file, -o file).
For jpg, I found jpegoptim which allows me to specify a size in either
kilobytes or percentage:
jpegoptim --size=900 --dest=compressed image.jpg
jpegoptim --size=90% --dest=compressed image.jpg
One downside of this though is it does not have a -o option to create
a new file; it either overwrites the input file, or takes in an output
directory that must exist ahead of time.
Post
Here goes nothing. An Internet search shows an answer on AskUbuntu#1164, author aneesheep.
The gist is to install ImageMagick (try package name imagemagick) and then use the convert utility:
convert -resize 20% image_small.png image.png
You can write a wrapper script that subscribes to your preferred options.
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