Converting Epub to PDF

shmendrapolk · 02-09-2013, 01:02 PM

There are numerous trheads about going from pdf to e-reader formats, but I'm having trouble going the other way:
-I need to convert some ebooks (mobi and/or epub) to pdf files. I've been using Calibre. But I'm not happy with the results.
The fonts either come out gigantic or way to small, the margins are never adequatem, and I lose all the hyperlinks (this part may be inevitable).

Does anyone have any advice? Ideally, I would want the book to look as close to what a print copy of it would theoretically look like.

Most of these are academic books; they are far easier to read and mark up on my iPad as pdf files (using iAnnotate) than using either the Kindle app or iBooks.

DSpider · 02-09-2013, 03:25 PM

Adjust the margins, font size, etc., to your liking from Calibre's settings before exporting it as a PDF. Or alternatively, convert it as HTML, open it in Word (or similar) and export as PDF from there. The ePub-PDF process is much easier than PDF-ePub, trust me. Epub was developed as both an output and a source, as opposed to PDF that should always be considered a final destination.

JSWolf · 02-09-2013, 05:25 PM

Using Calibre, take the ePub, convert it to HTMLZ, unzip the contents, load into Word, fix as needed, print to PDF. Done!

roger64 · 02-09-2013, 07:04 PM

Quote:

Originally Posted by shmendrapolk

Does anyone have any advice? Ideally, I would want the book to look as close to what a print copy of it would theoretically look like.

You may have a look to an example here. There are two PDF (different sizes), coming from the same source EPUB (with link to this one for comparison). It's made using Prince and a Jellby's script to convert EPUB to PDF.
https://www.mobileread.com/forums/sho...30#post2325330

and the script is somewhere in this thread
https://www.mobileread.com/forums/sho...ght=Prince.xml

Jellby · 02-10-2013, 03:16 AM

Quote:

Originally Posted by roger64

and the script is somewhere in this thread
https://www.mobileread.com/forums/sho...ght=Prince.xml

The latest version (and hopefully cross-platform) is in this thread. It's also easy to find in the sticky thread titled "ePub tools and reading software submitted here".

As Roger says, the script uses Prince, so it's capable of giving a very good-quality output, but it may need some tweaking in the CSS, depending on how the ePub is coded. The good news is you can do most of the tweaking without modifying the actual ePub.

shmendrapolk · 02-11-2013, 06:46 AM

Thanks! I'll try these.

On a related note, I bought an academic book in Kindle format (no choice here) which in print is a massive multi-columned collection of documents.

I converted it from AZW3 to epub and then I compared the two on my iPad - in the Kindle app vs the iBooks app. I couldn't believe how much better it looked in the iBook application.

Given that the formats are essentially the same in terms of how formatting works (text reflow, etc), I'm going with the assumption the Apple simply know how to make books like these more pleasing to look at than Amazon's Kindle app.

shmendrapolk · 02-11-2013, 07:38 AM

Quote:

Originally Posted by Jellby

The latest version (and hopefully cross-platform) is in this thread. It's also easy to find in the sticky thread titled "ePub tools and reading software submitted here".

As Roger says, the script uses Prince, so it's capable of giving a very good-quality output, but it may need some tweaking in the CSS, depending on how the ePub is coded. The good news is you can do most of the tweaking without modifying the actual ePub.

OK I downloaded this. But it seems to require the installation of PyQt, which in turn requires the installation of something else.
I know this has something to do with Python, which I know next to nothing about, but I don't want to start installing a whole bunch of things I know little about for an app that may be no better than Calibre.

So what is it exactly? And is it better than just messing around with Calibre?

Jellby · 02-11-2013, 09:26 AM

I don't know what calibre does, but this script simply uses Prince to generate the PDF, and offers a way to add ad-hoc CSS rules. You can install Prince and test it (just Prince) with some HTML files to see if you like what you can get. In principle, Prince offers a better line-breaking algorithm, and some useful CSS extensions (to get real floats, footnotes, generated content, etc.), and hyperlinks are retained. The script just extracts the HTML files from the ePub and passes them to Prince in a command line. You could do the same yourself without python.

If I had enough time and motivation I could probably turn this into a calibre plugin (calibre is python too), but wouldn't mind others doing that either.

roger64 · 02-12-2013, 08:00 AM

Hi

I do not know Python. I have heard that on Linux, distros are going to upgrade Python from 2.7 to 3.3 (or maybe it has already been done for some of them).

Will your script stop working for such a reason? Will it be necessary to update it?

Jellby · 02-12-2013, 11:18 AM

I don't know, I'm pretty much a python newbie... all I know is it works in my system, which still has python 2.7

Anyway, I expect the changes needed for python 3.3, if any, will be relatively straightforward, especially since the script does nothing really fancy.

roger64 · 02-12-2013, 06:45 PM

I'd like to be such a python newbie... Well; 2.7 for me too. Wait and see.

shmendrapolk · 02-12-2013, 07:28 PM

Quote:

Originally Posted by Jellby

I don't know what calibre does, but this script simply uses Prince to generate the PDF, and offers a way to add ad-hoc CSS rules. You can install Prince and test it (just Prince) with some HTML files to see if you like what you can get. In principle, Prince offers a better line-breaking algorithm, and some useful CSS extensions (to get real floats, footnotes, generated content, etc.), and hyperlinks are retained. The script just extracts the HTML files from the ePub and passes them to Prince in a command line. You could do the same yourself without python.

If I had enough time and motivation I could probably turn this into a calibre plugin (calibre is python too), but wouldn't mind others doing that either.

Calibre has some CSS related options. Problem is I don't know what the hell I'm doing.
What's Prince exactly?

shmendrapolk · 02-12-2013, 07:37 PM

Quote:

Originally Posted by JSWolf

Using Calibre, take the ePub, convert it to HTMLZ, unzip the contents, load into Word, fix as needed, print to PDF. Done!

I'm trying this method now.
Once I've unzipped the HTMLZ (using 7-Zip) how do I load it into word? If I just open the Index.html document, it does open, but the hyperlinks don't work. They take me to the top of the page.
Whereas in a web browser they do work.

So I must be doing something wrong.

Jellby · 02-13-2013, 04:33 AM

Quote:

Originally Posted by shmendrapolk

What's Prince exactly?

It is a program that generates PDFs from (x)HTML files (www.princexml.com), with better typesetting and more features than what you usually get from any "print to PDF" option around.

elibrarian · 02-13-2013, 12:22 PM

7-Zip can open epubs directly (if they're not encrypted, but then it would be illegal anyway). Also, Openoffice Writer can import HTML-files (Insert --> File) with most, if not all formatting intact, and save as PDF (Word 2010 also have the ability to save to PDF, without the need to "print".

Just a couple of tricks to try out ...

Regards,

Kim

02-09-2013, 01:02 PM	#1
shmendrapolk Member Posts: 10 Karma: 10 Join Date: May 2012 Device: kindle	Converting Epub to PDF There are numerous trheads about going from pdf to e-reader formats, but I'm having trouble going the other way: -I need to convert some ebooks (mobi and/or epub) to pdf files. I've been using Calibre. But I'm not happy with the results. The fonts either come out gigantic or way to small, the margins are never adequatem, and I lose all the hyperlinks (this part may be inevitable). Does anyone have any advice? Ideally, I would want the book to look as close to what a print copy of it would theoretically look like. Most of these are academic books; they are far easier to read and mark up on my iPad as pdf files (using iAnnotate) than using either the Kindle app or iBooks.

02-09-2013, 03:25 PM	#2
DSpider Evangelist Posts: 450 Karma: 343115 Join Date: Nov 2009 Location: Romania Device: PW2 2014	Adjust the margins, font size, etc., to your liking from Calibre's settings before exporting it as a PDF. Or alternatively, convert it as HTML, open it in Word (or similar) and export as PDF from there. The ePub-PDF process is much easier than PDF-ePub, trust me. Epub was developed as both an output and a source, as opposed to PDF that should always be considered a final destination. Last edited by DSpider; 02-09-2013 at 03:28 PM.

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02-09-2013, 05:25 PM	#3
JSWolf Resident Curmudgeon Posts: 73,894 Karma: 128597114 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	Using Calibre, take the ePub, convert it to HTMLZ, unzip the contents, load into Word, fix as needed, print to PDF. Done!

02-11-2013, 06:46 AM	#6
shmendrapolk Member Posts: 10 Karma: 10 Join Date: May 2012 Device: kindle	Thanks! I'll try these. On a related note, I bought an academic book in Kindle format (no choice here) which in print is a massive multi-columned collection of documents. I converted it from AZW3 to epub and then I compared the two on my iPad - in the Kindle app vs the iBooks app. I couldn't believe how much better it looked in the iBook application. Given that the formats are essentially the same in terms of how formatting works (text reflow, etc), I'm going with the assumption the Apple simply know how to make books like these more pleasing to look at than Amazon's Kindle app.

02-11-2013, 09:26 AM	#8
Jellby frumious Bandersnatch Posts: 7,515 Karma: 18512745 Join Date: Jan 2008 Location: Spaniard in Sweden Device: Cybook Orizon, Kobo Aura	I don't know what calibre does, but this script simply uses Prince to generate the PDF, and offers a way to add ad-hoc CSS rules. You can install Prince and test it (just Prince) with some HTML files to see if you like what you can get. In principle, Prince offers a better line-breaking algorithm, and some useful CSS extensions (to get real floats, footnotes, generated content, etc.), and hyperlinks are retained. The script just extracts the HTML files from the ePub and passes them to Prince in a command line. You could do the same yourself without python. If I had enough time and motivation I could probably turn this into a calibre plugin (calibre is python too), but wouldn't mind others doing that either.

02-12-2013, 08:00 AM	#9
roger64 Wizard Posts: 2,608 Karma: 3000161 Join Date: Jan 2009 Device: Kindle PW3 (wifi)	Hi I do not know Python. I have heard that on Linux, distros are going to upgrade Python from 2.7 to 3.3 (or maybe it has already been done for some of them). Will your script stop working for such a reason? Will it be necessary to update it?

02-12-2013, 11:18 AM	#10
Jellby frumious Bandersnatch Posts: 7,515 Karma: 18512745 Join Date: Jan 2008 Location: Spaniard in Sweden Device: Cybook Orizon, Kobo Aura	I don't know, I'm pretty much a python newbie... all I know is it works in my system, which still has python 2.7 Anyway, I expect the changes needed for python 3.3, if any, will be relatively straightforward, especially since the script does nothing really fancy.

02-12-2013, 06:45 PM	#11
roger64 Wizard Posts: 2,608 Karma: 3000161 Join Date: Jan 2009 Device: Kindle PW3 (wifi)	I'd like to be such a python newbie... Well; 2.7 for me too. Wait and see.

02-13-2013, 12:22 PM	#15
elibrarian Imperfect Perfectionist Posts: 460 Karma: 724664 Join Date: Dec 2011 Location: Ølstykke, Denmark Device: none	7-Zip can open epubs directly (if they're not encrypted, but then it would be illegal anyway). Also, Openoffice Writer can import HTML-files (Insert --> File) with most, if not all formatting intact, and save as PDF (Word 2010 also have the ability to save to PDF, without the need to "print". Just a couple of tricks to try out ... Regards, Kim

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