Thread: PDF to EPUB Conversion - best practice?
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Old 10-07-2024, 09:34 AM   #4
retiredbiker
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Quote:
Originally Posted by Ma'am-I-Am View Post
Now that Calibre has updated its ability to convert PDF to other formats, I do have one question:
After 38 minutes converting PDF to epub (I think the message said "converting to html"), progress was at only 1%. I aborted because my backup would have interrupted it anyway. Any insight on why it takes so long?
Since nearly anything can be hiding inside a pdf, it could be many things. One consistent problem seems to be complexity. People have reported waiting days or weeks trying to convert dictionaries or bibles, for example. If your pdf is reasonably small, simple, and has a clean text layer it should not take too long on modern hardware.

Take your pdf and try to highlight and copy-paste some text out of it from your pdf viewer. If that does not work, you are in trouble already. And if the text does copy out but is not very good, it is probably from an iffy OCR (Optical Character Recognition) done on the images, and the only way to fix that is to proofread and edit it.
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