How to create an OCF file

billrosenblatt · 05-19-2018, 11:26 AM

Hi,

Noob question on exporting EPUB ebooks in Calibre. I created an EPUB ebook in Calibre (by converting a Word doc and fuzting with the output of the conversion tool). Calibre stores the ebook in a file folder (Windows), but I want to be able to distribute it myself. It seems to me that there should be a simple way to export it as an OCF file, so that it can be sent around (e.g. by email) and opened in whatever reader someone else uses. But I can't find how to do this, except maybe to create a ZIP archive and just rename the filename extension.

How do you do this?

Thanks for any help!

theducks · 05-19-2018, 12:30 PM

What is a OCF file? Most common are Epub, AZW3, PDF

Save to Disk will export a current version (updates metadata) to a path.
Right-click on the STD icon, and you get to specify a specific format.

billrosenblatt · 05-19-2018, 01:30 PM

Sorry but that doesn't work. Save to Disk simply saves the files in a folder. It doesn't create a container file.

kovidgoyal · 05-19-2018, 01:35 PM

If you want to sharea book file with other people you simply need to email the book file itself, i.e. just the EPUB file. There is no need for container files or zip archives.

billrosenblatt · 05-19-2018, 02:00 PM

Thanks but then how does the cover image JPG travel with the ebook?

Terisa de morgan · 05-19-2018, 02:03 PM

Quote:

Originally Posted by billrosenblatt

Thanks but then how does the cover image JPG travel with the ebook?

It's part of the epub file.

Divingduck · 05-19-2018, 03:31 PM

@billrosenblatt, you usually include cover and basic basic dc metadata in your ebook. There should be no need to distribute a cover separately.

BetterRed · 05-19-2018, 07:36 PM

From this I get the impression that EPUB is OCF compliant.

OCF is the product of the Open Container Initiative (OCI), interestingly 3 of the big 'A's are not listed as OCI members - Adobe, Alphabet and Apple.

BR

itimpi · 05-20-2018, 01:43 AM

Quote:

Originally Posted by BetterRed

From this I get the impression that EPUB is OCF compliant.

OCF is the product of the Open Container Initiative (OCI), interestingly 3 of the big 'A's are not listed as OCI members - Adobe, Alphabet and Apple.

BR

from reading that link, it says that .epub files are OCF containers! It sounds like OCF is just a specification type, not a file extension.

Divingduck · 05-20-2018, 03:42 AM

Quote:

Originally Posted by itimpi

from reading that link, it says that .epub files are OCF containers! It sounds like OCF is just a specification type, not a file extension.

Correct. And here is where the EPUB definitions come from...
http://idpf.org/epub/201

05-19-2018, 11:26 AM	#1
billrosenblatt Junior Member Posts: 3 Karma: 10 Join Date: May 2018 Device: Samsung Galaxy S8	How to create an OCF file Hi, Noob question on exporting EPUB ebooks in Calibre. I created an EPUB ebook in Calibre (by converting a Word doc and fuzting with the output of the conversion tool). Calibre stores the ebook in a file folder (Windows), but I want to be able to distribute it myself. It seems to me that there should be a simple way to export it as an OCF file, so that it can be sent around (e.g. by email) and opened in whatever reader someone else uses. But I can't find how to do this, except maybe to create a ZIP archive and just rename the filename extension. How do you do this? Thanks for any help!

05-19-2018, 07:36 PM	#8
BetterRed null operator (he/him) Posts: 21,725 Karma: 29711016 Join Date: Mar 2012 Location: Sydney Australia Device: none	From this I get the impression that EPUB is OCF compliant. OCF is the product of the Open Container Initiative (OCI), interestingly 3 of the big 'A's are not listed as OCI members - Adobe, Alphabet and Apple. BR Last edited by BetterRed; 05-20-2018 at 06:53 AM.

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05-19-2018, 12:30 PM	#2
theducks Well trained by Cats Posts: 31,057 Karma: 60358908 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	What is a OCF file? Most common are Epub, AZW3, PDF Save to Disk will export a current version (updates metadata) to a path. Right-click on the STD icon, and you get to specify a specific format.

05-19-2018, 01:30 PM	#3
billrosenblatt Junior Member Posts: 3 Karma: 10 Join Date: May 2018 Device: Samsung Galaxy S8	Sorry but that doesn't work. Save to Disk simply saves the files in a folder. It doesn't create a container file.

05-19-2018, 01:35 PM	#4
kovidgoyal creator of calibre Posts: 45,351 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	If you want to sharea book file with other people you simply need to email the book file itself, i.e. just the EPUB file. There is no need for container files or zip archives.

05-19-2018, 02:00 PM	#5
billrosenblatt Junior Member Posts: 3 Karma: 10 Join Date: May 2018 Device: Samsung Galaxy S8	Thanks but then how does the cover image JPG travel with the ebook?

05-19-2018, 03:31 PM	#7
Divingduck Wizard Posts: 1,166 Karma: 1410083 Join Date: Nov 2010 Location: Germany Device: Sony PRS-650	@billrosenblatt, you usually include cover and basic basic dc metadata in your ebook. There should be no need to distribute a cover separately.