MobileRead Forums
Register Guidelines E-Books Search Today's Posts Mark Forums Read

Go Back   MobileRead Forums > E-Book Formats > PDF
Reload this Page Problem converting pdf to epub (size) using calibre

Notices

Reply
 
Thread Tools Search this Thread
Old 06-09-2010, 08:36 AM   #1
abadguy
Junior Member
abadguy began at the beginning.
 
Posts: 1
Karma: 10
Join Date: Jun 2010
Device: Iphone
Problem converting pdf to epub (size) using calibre
Hi everyone, I had a pdf ebook made only by images. I converted it into a searchable text pdf using an ocr program called pdf converter professional, a very good program. The original pdf was 8mb, the new pdf is about 18mb. When I try to convert it to epub format using Calibre I get an epub output file of 80+ mb and there's no way I could manage to upload such a big file to my iphone unfortunately (I also tried to convert the 8mb pdf to epub but I still get a big 70mb+ epub file as an output). I haven't figured out yet how to make my output file smaller, do I make some mistake in calibre's settings? Please help me I don't get why the epub is so big after conversion, after all this ebook is just 140 pages..

p.s. if this could help I also converted the file with the ocr program in a .doc format, but since calibre doesn't support .doc I don't know how this could be useful
Last edited by abadguy; 06-09-2010 at 08:47 AM.
abadguy is offline   Reply With Quote
Old 06-09-2010, 10:25 AM   #2
Pranananda
Connoisseur
Pranananda is often consulted by the I Ching.Pranananda is often consulted by the I Ching.Pranananda is often consulted by the I Ching.Pranananda is often consulted by the I Ching.Pranananda is often consulted by the I Ching.Pranananda is often consulted by the I Ching.Pranananda is often consulted by the I Ching.Pranananda is often consulted by the I Ching.Pranananda is often consulted by the I Ching.Pranananda is often consulted by the I Ching.Pranananda is often consulted by the I Ching.
 
Pranananda's Avatar
 
Posts: 98
Karma: 122982
Join Date: Apr 2010
Location: Humboldt County, California
Device: ipad, iPod touch, JetBook Lite
You might try making a copy of the epub (an epub is just a zip archive), renaming the extension to .zip (from .epub), unzipping the book, and see which files in the epub are large. It could be that there are some large images. If you then open the images in Preview or Photoshop or Gimp, you an probably save those images at a reduced resolution, zip of the files, and make it an epub again.
Pranananda is offline   Reply With Quote
Advert
Old 06-09-2010, 10:33 AM   #3
Jellby
frumious Bandersnatch
Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.
 
Jellby's Avatar
 
Posts: 7,515
Karma: 18512745
Join Date: Jan 2008
Location: Spaniard in Sweden
Device: Cybook Orizon, Kobo Aura
Maybe the "searchable text" pdf has both the images and the text, and when you convert it to epub, calibre keeps the images. Try getting a text-only file first with your OCR program, and make it HTML if possible.
Jellby is offline   Reply With Quote
Old 06-09-2010, 01:40 PM   #4
frabjous
Wizard
frabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameter
 
frabjous's Avatar
 
Posts: 1,213
Karma: 12890
Join Date: Feb 2009
Location: Amherst, Massachusetts, USA
Device: Sony PRS-505
Quote:
Originally Posted by abadguy View Post
p.s. if this could help I also converted the file with the ocr program in a .doc format, but since calibre doesn't support .doc I don't know how this could be useful
If your OCR program will only output the text in .pdf or .doc format, it should be pretty easy to convert the .doc to a format calibre can handle, like .html, .rtf or .odt. Just use a WordProcessor to open the .doc, and then save as or export as another format. If using M$ Word, save as filtered HTML. (If you don't have M$ Word, you could use a free open source word processor like OpenOffice, or AbiWord. I've mostly had success using the HTML output of AbiWord's conversions from doc to html in calibre to generate ebooks.)
frabjous is offline   Reply With Quote
Old 03-22-2012, 08:25 AM   #5
Hedaya
Connoisseur
Hedaya began at the beginning.
 
Posts: 81
Karma: 12
Join Date: Jul 2011
Device: Pocketbook 612
I'm having the reverse problem: getting epubs into PDFs. It actually just fails completely. any thoughts?
Hedaya is offline   Reply With Quote
Advert
Old 03-22-2012, 05:41 PM   #6
frabjous
Wizard
frabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameterfrabjous can solve quadratic equations while standing on his or her head reciting poetry in iambic pentameter
 
frabjous's Avatar
 
Posts: 1,213
Karma: 12890
Join Date: Feb 2009
Location: Amherst, Massachusetts, USA
Device: Sony PRS-505
Quote:
Originally Posted by Hedaya View Post
I'm having the reverse problem: getting epubs into PDFs. It actually just fails completely. any thoughts?
What is "it"? What method are you trying?

For the other direction, I'd use jellby's script instead. Here.
frabjous is offline   Reply With Quote
Old 03-23-2012, 05:33 AM   #7
Hedaya
Connoisseur
Hedaya began at the beginning.
 
Posts: 81
Karma: 12
Join Date: Jul 2011
Device: Pocketbook 612
I'll do that, thanx! =)
Hedaya is offline   Reply With Quote
Reply

« Previous Thread | Next Thread »
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Problem with double L's converting PDF to EPUB TheFakeMoonMan Conversion 26 06-08-2018 05:18 PM
Problem with accents converting PDF to EPUB madeira Calibre 0 07-09-2010 05:15 PM
Problem converting PDF to EPUB in calibre adgpro Calibre 2 07-09-2010 01:10 AM
Problem converting pdf to epub smartin Calibre 3 05-02-2010 06:55 AM
problem with calibre converting pdf to lrf badr Calibre 11 05-23-2008 10:16 AM


All times are GMT -4. The time now is 11:58 PM.

Contact Us - FAQ - Guidelines - Privacy - Top

MobileRead.com is a privately owned, operated and funded community.