[Plugin] JPEGOptimizer - Lossless image optimization

Doitsu · 10-28-2021, 12:27 PM

Released: November 26, 2021
Current Version: "0.0.3"

This plugin uses the jpegoptim command line utility to losslessly reduce the size of JPEG files.

Disclaimer: Since this plugin will replace the images in your ebook with optimized images, you might want to save your ePub or create a checkpoint before running this plugin.

Credits

BeckyEbook created the plugin icon, and KevinH provided the macOS binary.

System requirements

This plugin requires at least Sigil 0.9.8. If you uncheck the Use Bundled Python option, you'll also need to install Python 3. Linux users will also need to install the jpegoptim package (Debian, Arch).

Installation

1. Select Manage Plugins from the Plugins menu and enable the Use Bundled Python option, if it isn't already enabled (or greyed out).
2. Click Add Plugin and select JPEGOptimizer_v0.0.3.zip. This will install the plugin, which you can select via Plugins > Edit > JPEGOptimizer.

Settings

To turn on lossy optimization, edit JPEGOptimizer.json and change the quality value. For example:

Code:

  "quality": 80,

To display the folder that contains JPEGOptimizer.json select Edit > Preferences > Open Preferences Location. Then double-click plugins_prefs and JPEGOptimizer.
Windows users can also press WIN+R, paste %localappdata%\sigil-ebook\sigil\plugins_prefs\JPEGOptimizer into the Run dialog box and hit Enter.

License: GNU General Public License v3 (GPL-3)

DNSB · 10-28-2021, 01:31 PM

I gave the plugin a quick try and it worked well. Very nice.

DiapDealer · 10-28-2021, 04:37 PM

Added to the plugin index. Thanks!

Vanguard3000 · 12-05-2022, 06:06 PM

Hi, I'm really liking this plugin; it's part of my workflow now for all new ebooks. I don't suppose there's something like this that can handle bulk epub processing? I was thinking there may have been something similar as a Calibre plugin or standalone but I can't find anything like it.

Doitsu · 12-06-2022, 02:19 AM

Quote:

Originally Posted by Vanguard3000

I don't suppose there's something like this that can handle bulk epub processing?

You could use the Calibre Polish books tool for this.

Vanguard3000 · 12-06-2022, 01:03 PM

Quote:

Originally Posted by Doitsu

You could use the Calibre Polish books tool for this.

Perfect, that's exactly what I was looking for. Thanks!

10-28-2021, 01:31 PM	#2
DNSB Bibliophagist Posts: 48,175 Karma: 174315444 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	I gave the plugin a quick try and it worked well. Very nice. Last edited by DNSB; 10-28-2021 at 06:04 PM. Reason: Removed comment on release date in November

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10-28-2021, 04:37 PM	#3
DiapDealer Grand Sorcerer Posts: 28,891 Karma: 207182180 Join Date: Jan 2010 Device: Nexus 7, Kindle Fire HD	Added to the plugin index. Thanks!

12-05-2022, 06:06 PM	#4
Vanguard3000 Groupie Posts: 169 Karma: 474196 Join Date: Jan 2011 Location: Canada Device: Kobo Libra 2	Hi, I'm really liking this plugin; it's part of my workflow now for all new ebooks. I don't suppose there's something like this that can handle bulk epub processing? I was thinking there may have been something similar as a Calibre plugin or standalone but I can't find anything like it.

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