pl-jpegoptim

Table of Contents

• Abstract
• Description
• Usage
  • Arguments
  • Run
• Development
• Examples

Abstract

An app to optimize/compress JPEG/JFIF files.

Description

jpegoptim is a ChRIS ds-type application that takes in directory of JPEG/JFIF files and optimizes them by invoking the jpegoptim utility. More information available at:

'https://manpages.ubuntu.com/manpages/trusty/man1/jpegoptim.1.html'

Usage

docker run --rm fnndsc/pl-jpegoptim jpegoptim
    [-h|--help]
    [--json] [--man] [--meta]
    [--savejson <DIR>]
    [-v|--verbosity <level>]
    [--version]
    [--force] [--noaction] [--csv] [--quiet]
    [--totals] [--verbose]
    [--max=<###>]
    [--size=<###>]
    [--preserve] [--preserve-perms]
    [--strip-all] [--strip-none] [--strip-com]
    [--strip-exif] [--strip-iptc] [--strip-icc]
    [--strip-xmp]
    [--all-normal] [--all-progressive]

    <inputDir> <outputDir>

Arguments

[-h] [--help]
If specified, show help message and exit.

[--json]
If specified, show json representation of app and exit.

[--man]
If specified, print (this) man page and exit.

[--meta]
If specified, print plugin meta data and exit.

[--savejson <DIR>]
If specified, save json representation file to DIR and exit.

[-v <level>] [--verbosity <level>]
Verbosity level for app. Not used currently.

[--version]
If specified, print version number and exit.

[--force]
force optimization

[--max]
set maximum image quality factor (disables lossless optimization mode, which is by default on) Valid quality values: 0 - 100

[--noaction]
don't really optimize files, just print results

[--size]
Try to optimize file to given size (disables lossless optimization mode). Target size is specified either in kilo bytes (1 - n) or as percentage (1% - 99%)

[--csv]
print progress info in CSV format

[--preserve]
preserve file timestamps

[--preserve-perms]
preserve original file permissions by overwriting it

[--quiet]
quiet mode

[--totals]
print totals after processing all files

[--verbose]
enable verbose mode (positively chatty)

[--strip-all]
strip all markers from output file

[--strip-none]
do not strip any markers

[--strip-com]
strip Comment markers from output file

[--strip-exif]
strip Exif markers from output file

[--strip-iptc]
strip IPTC/Photoshop (APP13) markers from output file

[--strip-icc]
strip ICC profile markers from output file

[--strip-xmp]
strip XMP markers markers from output file

[--all-normal]
force all output files to be non-progressive

[--all-progressive]
force all output files to be progressive

Getting inline help is:

docker run --rm fnndsc/pl-jpegoptim jpegoptim --man

Run

You need to specify input and output directories using the -v flag to docker run.

docker run --rm -u $(id -u)                             \
    -v $(pwd)/in:/incoming -v $(pwd)/out:/outgoing      \
    fnndsc/pl-jpegoptim jpegoptim                        \
    /incoming /outgoing

Development

Build the Docker container:

docker build -t local/pl-jpegoptim .

Run unit tests:

docker run --rm local/pl-jpegoptim nosetests

Examples

Reduce input images to images half the size:

docker run -v $INPUTDIR:/indir -v $OUTPUTDIR:/outdir --rm fnndsc/pl-jpegoptim --size=50% /indir /outdir

Remove ALL metadata from input images:

docker run -v $INPUTDIR:/indir -v $OUTPUTDIR:/outdir --rm fnndsc/pl-jpegoptim --strip-all /indir /outdir

Remove IPTC metadata from input images:

docker run -v $INPUTDIR:/indir -v $OUTPUTDIR:/outdir --rm fnndsc/pl-jpegoptim --strip-iptc /indir /outdir