calibre - very slow conversion, very slow on PRS

cremofix · 06-09-2009, 02:03 PM

hello folks,

I found some interesting PDF-ebooks. Because PDF viewing on my PRS-700 is not very comfortable I tried to convert them the following way:

- extract the text from the PDF via copy/paste to a Word2007 file.

- Do some corrections

- safe as ebook.rtf

import with calibre and convert to epub.

The conversion for one book (about 500 pages on the PRS700) needs more than 3 hours.

The size of the epub-book is 0.7 MB

The ebook on the PRS700 is very slow, sometimes I need 2 or 3 minutes to change a page.

Is thee any efficient way to do this kind of conversion?
Where can be the reason for the very long conversion time (usually conversion is done within 10-20 seconds)

perhaps the fonts ?

please help, because I still have mor than 50 books in PDF format to be converted...

thanks
mario

kovidgoyal · 06-09-2009, 02:46 PM

Save your RTF files as clean HTML to improve performance.

mbovenka · 06-09-2009, 03:29 PM

Quote:

Originally Posted by kovidgoyal

Save your RTF files as clean HTML to improve performance.

Yep, converting RTF to anything else is v-e-r-y s-l-o-w, compared to other input formats, although I haven't run into 3-hour conversions myself...

Any idea why that is, Kovid?

kovidgoyal · 06-10-2009, 05:21 PM

Because the library calibre uses to convert RTF into HTML isn't the best, so you often get better results if you convert to HTML using another program

06-09-2009, 02:03 PM	#1
cremofix Member Posts: 12 Karma: 10 Join Date: Apr 2009 Device: Sony PRS700	calibre - very slow conversion, very slow on PRS hello folks, I found some interesting PDF-ebooks. Because PDF viewing on my PRS-700 is not very comfortable I tried to convert them the following way: - extract the text from the PDF via copy/paste to a Word2007 file. - Do some corrections - safe as ebook.rtf import with calibre and convert to epub. The conversion for one book (about 500 pages on the PRS700) needs more than 3 hours. The size of the epub-book is 0.7 MB The ebook on the PRS700 is very slow, sometimes I need 2 or 3 minutes to change a page. Is thee any efficient way to do this kind of conversion? Where can be the reason for the very long conversion time (usually conversion is done within 10-20 seconds) perhaps the fonts ? please help, because I still have mor than 50 books in PDF format to be converted... thanks mario

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06-09-2009, 02:46 PM	#2
kovidgoyal creator of calibre Posts: 44,546 Karma: 24495948 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Save your RTF files as clean HTML to improve performance.

06-10-2009, 05:21 PM	#4
kovidgoyal creator of calibre Posts: 44,546 Karma: 24495948 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Because the library calibre uses to convert RTF into HTML isn't the best, so you often get better results if you convert to HTML using another program

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