MobileRead Forums - View Single Post - Why does this one book not open up in Calibre (it's from Adobe Digital Editions)

jhowell · 09-29-2020, 04:20 PM

This should be a warning to others running the unreleased "master" DeDRM available from Apprentice Harper's GitHub. It is a work in progress and has bugs. If you use this software you could wind up with a calibre library full of junk.

One of the "features" of Adobe DRM is occasional, apparently random, corruption of the names of files inside of protected EPUBS. DeDRM undoes this, but that feature is broken in the "master" version. In this case, because the OPF file name was corrupted, it caused the entire EPUB to be unreadable. In other cases less important files may go missing, resulting in lost chapters or images in the book without any obvious error message.

(EDIT: After thinking about it some more, the chances of this sort of error going unnoticed are not as great as I first thought. Still, user beware.)

09-29-2020, 04:20 PM	#8
jhowell Grand Sorcerer Posts: 7,099 Karma: 92190113 Join Date: Nov 2011 Location: Charlottesville, VA Device: Kindles	This should be a warning to others running the unreleased "master" DeDRM available from Apprentice Harper's GitHub. It is a work in progress and has bugs. If you use this software you could wind up with a calibre library full of junk. One of the "features" of Adobe DRM is occasional, apparently random, corruption of the names of files inside of protected EPUBS. DeDRM undoes this, but that feature is broken in the "master" version. In this case, because the OPF file name was corrupted, it caused the entire EPUB to be unreadable. In other cases less important files may go missing, resulting in lost chapters or images in the book without any obvious error message. (EDIT: After thinking about it some more, the chances of this sort of error going unnoticed are not as great as I first thought. Still, user beware.) Last edited by jhowell; 09-30-2020 at 01:30 PM.