Quote:
Originally Posted by Tiiba
Turned out he used Calibre to convert a PDF to an ePub. Apple mentions Calibre by name as a Bad Idea.
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This is funny (although not for you...). As stated earlier, PDF is the worst format to convert from most of the time. It actually depends on the PDF.
Try to get a non-PDF file to start from and fire the designer. He does not know what he is doing and if he delivers something, he needs to fix it. I assume he is paid to deliver a working e-book.
If the source cannot be better than a PDF, consider running it through OCR.
I think it is very funny that Apple mentions Calibre as Bad Idea. Who is Apple to say so? Calibre follows the ePUB standard much better than Apple themselves with their iTunes and iBooks crap.
About the error, the images are wrongly in the xhtml files. There is missing an attribute. If you say that there are 9017 messages about this, than it is quite a large book with an enormous amount of images. More likely, things are identified as image but are actually not.
You could try loading the book in Sigil and save it again. That should solve the messages regarding alt=.