Sigil detects metadata but Calibre doesn't? So lost.

[penguin121]

I have a few epubs that were made very sloppily. They're readable, but too much metadata to do one by one.

I've spent a lot of time playing around to see what exact file in the epub is the issue (it's structured really weird). Sigil detects the metadata, but Calibre doesn't. Saving from Sigil doesn't change anything. What's that about?

(Also, replacing <metadata> in the faulty epub's .opf with the <metadata> from a functional epub makes it readable to Calibre. Couldn't find a fix short of manually adjusting it, but it's worth mentioning. Just asking about the Sigil-Calibre detection differences though.)

[theducks]

GIGO
If there are structure issues, those need to be fixed before automated tools have a chance.

NOW:
Calibre uses Library Metadata as the source to Embed (Polish, Embed...)
But the Editor can also auto update While opening the book.
(in the editor) Preferences: Integration with Calibre: Tick the box

[BetterRed]

Long Story Short - the calibre library manager sources the metadata from its database, Sigil sources its metadata from the opf file in the EPUB.

Use Calibre's Polish book tool (press 'P') to get the library database metadata into the EPUB, use Metadata edit to set the library database to what is in the EPUB, viz:



BR

[penguin121]

So I tried those methods... Perhaps I didnt do a good job of it, but I couldn't figure out a way to make it work :\

The metadata is definitely in the .opf. I wasn't sure how the Metadata Edit works? I tried a few templates, tried using Polish "update metadata," in both orders, and couldn't make any metadata appear. I may have done this wrong...

Unfortunately integrating the editor with calibre to update metadata didn't do the trick either

[davidfor]

Originally Posted by penguin121

So I tried those methods... Perhaps I didnt do a good job of it, but I couldn't figure out a way to make it work :\

The metadata is definitely in the .opf. I wasn't sure how the Metadata Edit works? I tried a few templates, tried using Polish "update metadata," in both orders, and couldn't make any metadata appear. I may have done this wrong...

Unfortunately integrating the editor with calibre to update metadata didn't do the trick either

I can't tell where you are seeing that the metadata is wrong or in which direction you are trying to update it. So...

The metadata editor in calibre does not update the actual book. It updates the database and then calibre will update the OPF file that is in the directory the book is in (which is used as a backup). To actually update the book, you need to do something. The methods I can think of to update the actual book are Embed metadata, a conversion, Polish books, the Modify ePub plugin, send-to-device or save-to-disk and opening with the editor. And if the ePub Metadata writer plugin is disable, most of the above won't do anything.

If you are updating the metadata directly in the book by Sigil, the calibre editor or some other metadata editor, then calibre will only read this when the book is first added to the library. If you edit the book afterwards, you will need to fetch the metadata again from the book. This can be done from the edit metadata screen. Select the book in the list of formats in the top right corner, and press "Set metadata" button.

Rereading the first post, I think your problem is the latter. Or possibly both. If you are editing the book with Sigil and updating the metadata, these changes will not show in the calibre library until you do the second of the above. And if you update the metadata in calibre, and edit the book in Sigil, you will not see the changed metadata unless you do one of the first options. Maybe calibre needs an "Embed metadata before opening with external program" option somewhere.

[McStubb]

In the metadata editor can you select set metadata from ebook format and see of that updates calibre?