Thread: [Conversion Output] KFX Output
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Old 05-01-2020, 08:23 PM   #835
jhowell
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Quote:
Originally Posted by steakhutzeee View Post
Just converted an epub and this is the log. There are some errors and some are about "obfuscated fonts".
Failed to de-obfuscate EPUB font OEBPS/Fonts/font00217.otf
Failed to de-obfuscate EPUB font OEBPS/Fonts/font00228.otf
Failed to de-obfuscate EPUB font OEBPS/Fonts/font00229.otf

Commercially published EPUBs use a weak form of DRM called obfuscation to protect embedded font files. The errors indicate that the EPUB has been edited in a way that breaks the font obfuscation algorithm, preventing to fonts from being decoded.

This will prevent the embedded fonts in the book from being used. Whether that has much of an effect or not on readability depends on the book.

You can use the calibre editor to remove the fonts from the book along with references to them in the book's CSS and see how it looks. Or you can go back to the original EPUB file and edit it more carefully before converting it.
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