Quote:
Originally Posted by DNSB
Did you try adding the files/directories to a .zip file and then renaming it as .epub? The mimetype file goes uncompressed in the root of the .zip file, the META-INF and OEBPS directories are compressed.
|
Thank you so much for your reply. First, I would like to clarify I did not intend to indulge in illegal or inappropriate actions of DRM removal or other. I was genuinely interested in what may have caused the conversion issue on a technical level.
I did try your suggestion. I renamed the .zip to .epub, which turned the compressed file into an epub per se. I reloaded it on calibre, but same thing. No readable text or images, all gibberish.
I also launched the epub to another converter software and it showed an error of "DRM unknown", so it couldn't even read the book or do any conversion. It was kept "locked".
I suspect the proprietary DRM of the company is the "culprit" indeed.
Thank you again for your help.
