Converting OPF to mobi loses article's author and description?

Felix Ding · 08-21-2015, 03:56 AM

Hi,

I'm trying to convert a OPF to a mobi ebook using ebook-convert like

Code:

ebook-convert book.opf book.mobi

The convertion went OK and I could get the ebook.

But when I read the book on a Kindle Paperwhite, I found all articles' author and description info are lost.

In Paperwhite's Cover View, there is 'No details available' under each article title.

However, these information are in the OPF file:

Code:

<navPoint playOrder="2" class="article" id="88f3f4f35ed557e95c59024d92a73b33">
  <navLabel>
    <text>India blocks Colgate patents for spices</text>
  </navLabel>
  <content src="1.html"/>
  <mbp:meta name="description">India blocks Colgate patents for spices</mbp:meta>
  <mbp:meta name="author">Unknown</mbp:meta>
</navPoint>

Is there anyway to solve this? Thank you.

kovidgoyal · 08-21-2015, 06:45 AM

You cannot create periodicals by conversion only using the recipe system in calibre. Periodicals are the format needed for per article metadata.

Felix Ding · 08-21-2015, 09:51 PM

Quote:

Originally Posted by kovidgoyal

You cannot create periodicals by conversion only using the recipe system in calibre. Periodicals are the format needed for per article metadata.

Thanks for the prompty reply. But,

1. If I do

Code:

ebook-convert lifehacker.recipe lifehacker.mobi

I could get a ebook with authors and descriptions.

2. I tried to add these to article's HTML files:

Code:

<head>
    <meta charset='utf-8'>
    <meta content="here is the author" name="author"/>
    <meta content="here is the description" name="description" />
    <title>India blocks Colgate patents for spices</title>
  </head>

Then run

Code:

ebook-convert book.opf book.mobi

But still, "No details available".

What do you mean "per article metadata"?

By the way, if use kindlegen as

Code:

kindlegen lifehacker.opf lifehacker.mobi

I could get a ebook with authors and descriptions.

kovidgoyal · 08-21-2015, 11:04 PM

When you run ebook-convert with a .recipe file you are using the recipe system.

Once again, you can only create periodicals using the recipe system, and only periodicals have support for per article metadata. I dont know what kindlegen has to do with anything. *calibre* can only create periodicals using the recipe system. What kindlegen can or cannot do is irrelevant.

Felix Ding · 08-28-2015, 01:59 AM

Quote:

Originally Posted by kovidgoyal

When you run ebook-convert with a .recipe file you are using the recipe system.

Once again, you can only create periodicals using the recipe system, and only periodicals have support for per article metadata. I dont know what kindlegen has to do with anything. *calibre* can only create periodicals using the recipe system. What kindlegen can or cannot do is irrelevant.

Alright, thanks.

If I want to modify Calibre and recompile ebook-convert, where shoud I start?

I have located the code thats gives the 'No details available' message: https://github.com/kovidgoyal/calibr...er2/indexer.py

It seems that I only need to make sure that node.description comes from toc.ncx, or somewhere else. But which class/file should I modify?

I don't know Python, but it should not be too hard to to it.

kovidgoyal · 08-28-2015, 02:05 AM

Instructions on setting up a calibre development environment are in the user manual. You dont need to compile anything, it is as simple as running three commands

08-21-2015, 03:56 AM	#1
Felix Ding Member Posts: 11 Karma: 10 Join Date: Nov 2011 Device: iPad	Converting OPF to mobi loses article's author and description? Hi, I'm trying to convert a OPF to a mobi ebook using ebook-convert like Code: ebook-convert book.opf book.mobi The convertion went OK and I could get the ebook. But when I read the book on a Kindle Paperwhite, I found all articles' author and description info are lost. In Paperwhite's Cover View, there is 'No details available' under each article title. However, these information are in the OPF file: Code: <navPoint playOrder="2" class="article" id="88f3f4f35ed557e95c59024d92a73b33"> <navLabel> <text>India blocks Colgate patents for spices</text> </navLabel> <content src="1.html"/> <mbp:meta name="description">India blocks Colgate patents for spices</mbp:meta> <mbp:meta name="author">Unknown</mbp:meta> </navPoint> Is there anyway to solve this? Thank you.

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08-21-2015, 06:45 AM	#2
kovidgoyal creator of calibre Posts: 43,858 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	You cannot create periodicals by conversion only using the recipe system in calibre. Periodicals are the format needed for per article metadata.

08-21-2015, 11:04 PM	#4
kovidgoyal creator of calibre Posts: 43,858 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	When you run ebook-convert with a .recipe file you are using the recipe system. Once again, you can only create periodicals using the recipe system, and only periodicals have support for per article metadata. I dont know what kindlegen has to do with anything. calibre can only create periodicals using the recipe system. What kindlegen can or cannot do is irrelevant.

08-28-2015, 02:05 AM	#6
kovidgoyal creator of calibre Posts: 43,858 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Instructions on setting up a calibre development environment are in the user manual. You dont need to compile anything, it is as simple as running three commands

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