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

Go Back   MobileRead Forums > E-Book Software > Calibre

Notices

Reply
 
Thread Tools Search this Thread
Old 04-20-2012, 10:27 AM   #1
marshap
Member
marshap began at the beginning.
 
Posts: 11
Karma: 10
Join Date: Apr 2012
Device: Kobo Aura H2O
Can you tell if an epub was converted from mobi or vice versa?

Is there a way to determine if an epub ebook is the original format, or if it was converted from mobi or some other format?
marshap is offline   Reply With Quote
Old 04-20-2012, 11:13 AM   #2
kovidgoyal
creator of calibre
kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.
 
kovidgoyal's Avatar
 
Posts: 26,314
Karma: 5382313
Join Date: Oct 2006
Location: Mumbai, India
Device: Various
Look at the timestamp on the files.
kovidgoyal is offline   Reply With Quote
Old 04-20-2012, 11:33 AM   #3
theducks
Grand Sorcerer
theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.
 
theducks's Avatar
 
Posts: 15,054
Karma: 5936659
Join Date: Aug 2009
Location: (The original) Silicon Valley, USA
Device: Galaxy Tab 2, Astak Pocket Pro, K4NT
Quote:
Originally Posted by marshap View Post
Is there a way to determine if an epub ebook is the original format, or if it was converted from mobi or some other format?
If the time stamp does not help:
use Tweak to explode the book and look at the end of a chapter with an editor
if you see a line similar to this
Code:
<div class="mbppagebreak" id="calibre_pb_36"></div>
It probably was a (Calibre?) Mobi at some time in its life
theducks is offline   Reply With Quote
Old 04-20-2012, 12:06 PM   #4
cybmole
Wizard
cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.
 
Posts: 2,962
Karma: 1280000
Join Date: Sep 2010
Device: Kobo aura HD, Kobo Arc, Kindle Fire HDX 8.9 , Kindle for PC
Quote:
Originally Posted by theducks View Post
If the time stamp does not help:
use Tweak to explode the book and look at the end of a chapter with an editor
if you see a line similar to this
Code:
<div class="mbppagebreak" id="calibre_pb_36"></div>
It probably was a (Calibre?) Mobi at some time in its life
how reliable is that test?
I see those lines in lots of epubs, some of which also have drop cap styling at chapter start, which makes me think they are optimised epubs, not mobi conversions ?
am i right in thinking that those mbppagebreak lines do not do anything in epub format. I often remove them as they seem to have no effect ?
cybmole is offline   Reply With Quote
Old 04-20-2012, 12:33 PM   #5
dwig
Guru
dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.
 
dwig's Avatar
 
Posts: 982
Karma: 1382338
Join Date: Dec 2004
Location: Paradise (Key West, FL)
Device: Current:Dell Venue 8 Pro, Kindle 3/WiFi - Retired:Clie UX50, T415, ...
Quote:
Originally Posted by cybmole View Post
...which makes me think they are optimised epubs, not mobi conversions ? ...
They are possibly both. They can very well be MOBI conversions that contain ePub optimizations added after conversion. On the other hand they can be original ePubs that were created for use as such that later had the MOBI specific tag added in preparation for conversion to MOBI
dwig is offline   Reply With Quote
Old 04-20-2012, 02:14 PM   #6
cybmole
Wizard
cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.cybmole ought to be getting tired of karma fortunes by now.
 
Posts: 2,962
Karma: 1280000
Join Date: Sep 2010
Device: Kobo aura HD, Kobo Arc, Kindle Fire HDX 8.9 , Kindle for PC
Hmmm, your 2nd option seems more likely - I thought it was pretty much impossible to work in mobi as a source format - as there are no decent tools/editors.

thus most authors/publishers would do their styling in epub or in html & then-to-epub; & convert to mobi only to sell on amazon ?
cybmole is offline   Reply With Quote
Old 04-20-2012, 06:13 PM   #7
dwig
Guru
dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.dwig ought to be getting tired of karma fortunes by now.
 
dwig's Avatar
 
Posts: 982
Karma: 1382338
Join Date: Dec 2004
Location: Paradise (Key West, FL)
Device: Current:Dell Venue 8 Pro, Kindle 3/WiFi - Retired:Clie UX50, T415, ...
Quote:
Originally Posted by cybmole View Post
...
thus most authors/publishers would do their styling in epub or in html & then-to-epub; & convert to mobi only to sell on amazon ?
Yes, most MOBI ebooks a created from either ePub or HTML source files.

It is not possible to edit the MOBI format itself as it is a compiled file. To make changes you have to extract the contents by decompiling it or convert it to some other format. You can then edit the pieces and use the edited pieces to create a new MOBI.
dwig is offline   Reply With Quote
Old 04-20-2012, 06:24 PM   #8
JSWolf
Resident Curmudgeon
JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.
 
JSWolf's Avatar
 
Posts: 37,777
Karma: 18492088
Join Date: Nov 2006
Location: Roslindale, Massachusetts
Device: Sony Reader PRS-650, iPad, nook STR
Quote:
Originally Posted by kovidgoyal View Post
Look at the timestamp on the files.
When the DRM is removed, an ePub can have the same date/timestamp. Same way a Calibre conversion can.
JSWolf is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Mobi to Epub or vice versa Kumabjorn Conversion 3 01-13-2012 01:17 PM
Transferring a books from Kindle on PC to Calibre and vice versa Heathside Boy Amazon Kindle 9 10-09-2011 03:25 PM
Russian to English and vice versa? afterry Ectaco jetBook 3 02-12-2010 07:47 AM
EPUB TO PDF AND VICE VERSA MSMYTH Sony Reader 2 01-10-2010 02:55 PM
Can Sony read Kindle eBooks and Vice versa? ScottAGross Which one should I buy? 21 01-12-2008 04:41 AM


All times are GMT -4. The time now is 07:23 AM.


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