Hi all, I have written a plugin for converting scanned PDFs from google books and the like to DJVU. You can use the Convert menu or have them converted automatically on import.
https://github.com/kfix/calibre_plug...aker/releases/
I personally use it to keep koreader on my Kindle fed with very big old books :-)
Only tested on OSX, but linux and windows are theoretically possible if someone can write a build & install script for the conversion apps.
YOU MUST GO TO github to read the install procedure and to report all issues and feature requests. The plugin requires extra software to be installed.
I am only on this thread to upload the occasional bug-fix/API update, because this CHAT FORUM is used as a Software Update Service by Calibre
