calibre bloating converted file?

blubb · 10-17-2010, 07:24 PM

actually, as new as i am with calibre, and the fact that i don't use it that much for the fact it eats almost all my cpu unfortunately. as far as i gathered now, pdf is not the best source for converting. unfortunately most of my books are in pdf ... yet, isn't a converted ~7mb original pdf into an ~145mb epub quite excessive? k, it has about 400 pages, yet ...

itimpi · 10-17-2010, 10:25 PM

That suggests that the original PDF file is an image based one, and not a text based one. In that case there is not much point in trying to convert it as the output is unlikely to be useful.

Starson17 · 10-18-2010, 09:00 AM

Quote:

Originally Posted by itimpi

That suggests that the original PDF file is an image based one, and not a text based one. In that case there is not much point in trying to convert it as the output is unlikely to be useful.

I agree. with itimpi's comment above. It would be possible to run the pdf through OCR, delete out the page images and convert that. It's a lot of work, but it will produce a smaller file than the original 7mb pdf and make the text reflowable as a decent ebook should.

blubb · 10-18-2010, 01:59 PM

Quote:

Originally Posted by itimpi

That suggests that the original PDF file is an image based one, and not a text based one.

that was also one of my first thoughts when i tried to open the epub, coz it took ages. as for ocr, i played with the thought of saving the pdf as txt and converting it then, if it worked. only question left, wot about the tons of footnotes then.

10-17-2010, 07:24 PM	#1
blubb Junior Member Posts: 4 Karma: 10 Join Date: Oct 2010 Device: some android	calibre bloating converted file? actually, as new as i am with calibre, and the fact that i don't use it that much for the fact it eats almost all my cpu unfortunately. as far as i gathered now, pdf is not the best source for converting. unfortunately most of my books are in pdf ... yet, isn't a converted ~7mb original pdf into an ~145mb epub quite excessive? k, it has about 400 pages, yet ...

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10-17-2010, 10:25 PM	#2
itimpi Wizard Posts: 4,552 Karma: 950151 Join Date: Nov 2008 Device: Sony PRS-950, iphone/ipad (Marvin/iBooks/QuickReader)	That suggests that the original PDF file is an image based one, and not a text based one. In that case there is not much point in trying to convert it as the output is unlikely to be useful.