PDF not importing to Library correctly

tempura · 07-16-2014, 09:49 AM

So, I have been stuck with a peculiar problem of PDF importing to calibre. I have been trying to add this PDF of an Academic Paper called: "Timing Attacks on Implementations of Diffe-Hellman, RSA, DSS, and Other Systems" by Paul C. Kocher. It's a PDF created using LaTEX (atleast from looking at it).

I am using Windows 7 with Calibre 1.44, though I noticed this trouble happening with 1.41 as well.

I am not sure what happens but basically, I just add the book to calibre, and the PDF text gets scrambled or maybe the text turns to the color white. But I can't open it through Adobe Reader which just gives a Bad File Error, then I used SumatraPDF(my Default PDF Reader) which just displays the text as white, while all the images are intact. I tried importing the book through the Edit Metadata Dialog Box, but it gives the same result.

Anyway, I have attached the original PDF to this post and the one which calibre creates, after importing.

Also, does this mean that some of the previous PDF's which I have in my library might not have been imported correctly?

Any help is appreciated.

itimpi · 07-16-2014, 10:30 AM

Not sure what is going on here, but Calibre does not change a file in any way during an import.

kovidgoyal · 07-16-2014, 10:44 AM

A file imported into calibre is byte identical to the original. The only exception to that is if you installed some third party plugins, most commonly drm removal plugins which often change files during import.

tempura · 07-16-2014, 11:29 AM

Well, looked like disabling the DRM plugin worked. Thanks Kovid.

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07-16-2014, 10:30 AM	#2
itimpi Wizard Posts: 4,553 Karma: 950151 Join Date: Nov 2008 Device: Sony PRS-950, iphone/ipad (Marvin/iBooks/QuickReader)	Not sure what is going on here, but Calibre does not change a file in any way during an import.

07-16-2014, 10:44 AM	#3
kovidgoyal creator of calibre Posts: 45,145 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	A file imported into calibre is byte identical to the original. The only exception to that is if you installed some third party plugins, most commonly drm removal plugins which often change files during import.

07-16-2014, 11:29 AM	#4
tempura Connoisseur Posts: 71 Karma: 47102 Join Date: Dec 2013 Location: Outside the Universe Device: Kindle PW3	Well, looked like disabling the DRM plugin worked. Thanks Kovid.

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