• Smally
  • JPEG Compression
  • PNG Compression
  • GIF Compression
  • Install Tools
    • Fedora
    • Ubuntu
    • Compile Install
  • Run Test
  • Usage
  • Screenshot
  • Old Version

Smally

A simple tool to compress all JPEG, PNG and GIF files losslessly in a folder, by invoking the famous jpegtran, optipng and gifsicle.

Smally uses file command to determine file type, and it would keep the file name and mtime unchnaged after compression!

JPEG Compression

1. Using jpegtran to reduce all metadata.
2. To compare among the original file, baseline format and progressive format files, choose the smallest one in size.
3. Whenever possible, choose progressive format version.

PNG Compression

Simply calling optipng to compress PNG, in the most crazy -o7 -zm1-9 level.

GIF Compression

Simple calling gifsicle to compress GIF, by using -O3 --color 256.

Install Tools

Smally needs jpegtran, optipng and gifsicle to do it's job.

Fedora

$ sudo dnf install libjpeg-turbo-utils optipng gifsicle

Ubuntu

sudo apt install libjpeg-turbo-progs optipng gifsicle

Compile Install

$ sudo bash _install_tools.sh JPEG
$ sudo bash _install_tools.sh PNG
$ sudo bash _install_tools.sh GIF
$ # or all in one command
$ sudo bash _install_tools.sh JPEG PNG GIF

This will compile and install the latest version of jpegtran, optipng and gifsicle at /usr/bin automatically. Be careful, the originals will be removed.

For the success of installation, you might also need:

$ sudo dnf install gcc make autoconf automake

Run Test

$ bash test.sh

Usage

Normally:

$ # for all jpeg, png and gif
$ find <path/to/image_folder> -type f -exec bash smally.sh {} \;
$ # only jpeg
$ find <path/to/image_folder> -type f -exec bash smally.sh -t JPEG {} \;
$ # only png
$ find <path/to/image_folder> -type f -exec bash smally.sh -t PNG {} \;
$ # only gif
$ find <path/to/image_folder> -type f -exec bash smally.sh -t GIF {} \;

Or to use xargs' -P parameter to take advantage of multi-core CPU:

$ # -P4 means 4 paralleled processes
$ find <pathname> -type f -print0 | xargs -0 -P4 -I{} bash smally.sh {}

For single file:

$ python3 smally.py --jpegtran <jpeg_file>
$ python3 smally.py --optipng <png_file>
$ python3 smally.py --gifsicle <gif_file>

For single file which you don't know the format:

$ bash smally.sh <filename>

Screenshot

Old Version

This version (from V0.50) of smally is a total refactor one, old versions are too complicated, which I do not recommend!