Script that:
- optimizes the images by reducing their size and quality
- converts the images to webp and avif
Install the image optimization script and all requriements on your machine.
The docker image contains all dependencies needed. No need to install any dependencies. You can run the script on any machine that has docker installed on it.
The docker image is here
username@pc# optimize --help
Optimize v0.21.06.24 Copyright (c) 2021, Rashko Petrov
Usage: optimize [OPTIONS]...
Optimize/Compress images quality and size.
A wrapper around other tools and optimization services that simplifies the process.
Options:
--jpg Optimize the jpg images
--jpg-to-webp Convert the jpg images in webp but keeps the original files
--jpg-to-avif Convert the jpg images in avif but keeps the original files
--jpg-optimization-lvl <int> Overrides the global optimization level
--png Optimize all png images
--png-to-webp Convert the png images in webp but keeps the original files
--png-to-avif Convert the png images in avif but keeps the original files
--png-optimization-lvl <int> Overrides the global optimization level.
Optimization settings:
-s, --strip-markers Strip metadata when optimizing jpg/png images
-o <int>, --optimization-lvl <int> Optimization level (0-7) [default: 2]
WEBP settings:
--webp-quality-factor <int> Quality factor (0:small..100:big), [default: 82]
--webp-lossless-preset <int> Activates lossless preset with given level in [default: 9]
(0:fast..9:slowest)
AVIF settings (The Next-Gen Compression Codec):
--avif-compression-level <int> Compression level (0..63), [default: 25]
--avif-compression-speed <int> Compression speed (0..8), [default: 4]
--cmin [+|-]<n> File's status was last changed n minutes ago
--allow-concurrency Allow running the script multiple times at the same time for
the same directory
-a, --all Optimize and convert all jpg/png images to webp/avif
--source-dir <string> Define images path [default: current directory]
-v, --version Print version information and quit
Examples:
optimize Prints the help text
optimize --help Prints the help text
optimize --png --jpg --strip-markers Optimizes all png and jpg in current directory
optimize --png --source-dir ./dir/images Optimizes all png in given directoryusername@pc# optimize -s -a
Optimize v0.21.06.24 Copyright (c) 2021, Rashko Petrov
Optimizing the images...
==> ** Processing: 4k.jpg
Path: ./temp/4k.jpg
Size (kb):
before: 18306 after: 4483 difference: 13823
percentage difference: 75
==> ** Processing: 4k.png
Path: ./temp/4k.png
Size (kb):
before: 47668 after: 34843 difference: 12825
percentage difference: 26
Converting the images to webp...
==> ** Processing: 4k.jpg
Path: ./temp/4k.jpg
Size (kb):
before: 4483 after: 3673 difference: 810
percentage difference: 18
==> ** Processing: 4k.png
Path: ./temp/4k.png
Size (kb):
before: 34843 after: 3295 difference: 31548
percentage difference: 90
Converting the images to avif...
==> ** Processing: 4k.jpg
Path: ./temp/4k.jpg
Size (kb):
before: 4483 after: 2301 difference: 2182
percentage difference: 48
==> ** Processing: 4k.png
Path: ./temp/4k.png
Size (kb):
before: 34843 after: 2056 difference: 32787
percentage difference: 94
The optimization/conversion process takes a while.
- This script was inspired by VirtuBox / img-optimize
- WebP conversion script was inspired by this DigitalOcean Community Tutorial
- Tutorial about webp conversion available on jesuisadmin.fr (in french)
- Article about how to build a smaller docker image https://medium.com/@gdiener/