Why would a book PDF work ok as a file, but not open in Calibre?

willbeaufoy · 07-13-2016, 08:12 AM

I have a book pdf that opens fine if you just open it as a file before adding it to Calibre, but once you add it to Calibre (2.62) it opens blank with a message 'this document has no pages'. Why might this be? I can't really add this as a bug as it only seems to affect this book.

pdurrant · 07-13-2016, 08:35 AM

Quote:

Originally Posted by willbeaufoy

I have a book pdf that opens fine if you just open it as a file before adding it to Calibre, but once you add it to Calibre (2.62) it opens blank with a message 'this document has no pages'. Why might this be? I can't really add this as a bug as it only seems to affect this book.

calibre displays PDFs by first converting them to an ePub. I think this conversion is going wrong.

Double-check this by actually trying an explicit conversion and see what you get.

eschwartz · 07-13-2016, 08:43 AM

I would double-check by examining the filesize of the PDF stored in calibre, and/or opening it in the same software used to read the PDF pre-import.

Also, disable reading PDF in the builtin viewer. See Preferences ==> Behavior ==> Use builtin viewer for ...

...

calibre does not modify ebooks during the import process, thy should be byte-identical. Thirdarty plugins of the "filetype plugin" type can, however.

willbeaufoy · 07-13-2016, 02:43 PM

Thanks for both replies. As you both indicated, the problem was the conversion giving an error and it turned out indeed to be due to a 'filetype plugin', which I disabled and now the import works fine. Thanks for the help.

07-13-2016, 08:12 AM	#1
willbeaufoy Junior Member Posts: 4 Karma: 10 Join Date: Oct 2015 Device: Nook	Why would a book PDF work ok as a file, but not open in Calibre? I have a book pdf that opens fine if you just open it as a file before adding it to Calibre, but once you add it to Calibre (2.62) it opens blank with a message 'this document has no pages'. Why might this be? I can't really add this as a bug as it only seems to affect this book.

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07-13-2016, 08:43 AM	#3
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85400180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	I would double-check by examining the filesize of the PDF stored in calibre, and/or opening it in the same software used to read the PDF pre-import. Also, disable reading PDF in the builtin viewer. See Preferences ==> Behavior ==> Use builtin viewer for ... ... calibre does not modify ebooks during the import process, thy should be byte-identical. Thirdarty plugins of the "filetype plugin" type can, however.

07-13-2016, 02:43 PM	#4
willbeaufoy Junior Member Posts: 4 Karma: 10 Join Date: Oct 2015 Device: Nook	Thanks for both replies. As you both indicated, the problem was the conversion giving an error and it turned out indeed to be due to a 'filetype plugin', which I disabled and now the import works fine. Thanks for the help.

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