Metadata on device different to Calibre

jindroush · 08-13-2016, 08:01 AM

I have Kindle Voyage. All my metadata in Calibre are perfect (ie. author name/surname in correct order, series filled in, everything with correct diacritics (using czech language which have many of those)).

I use one plugboard for connecting series names to book titles.

Sometimes, but only sometimes, this fails and the title displayed on Kindle is wrong. I can't find out the reason.

All the cases are stored as MOBI in Calibre, all have the unwanted metadata stored in them and on transfer, althought they're somehow changed by Calibre, the unwanted metadata are used by Kindle, not those wanted.
All of these have small 'DOC' displayed to the reading dots in the latest Voyage firmware, but not all which have DOC are these cases.

Why, and how can this be fixed?

Example:
This is mobi file in calibre run through ebook-meta.exe (unwanted)
Title : Husitská trilogie - 3 - Lux Perpetua
Author(s) : Sapkowski Andrzej

This is mobi file on the device (wanted)
Title : Husitská trilogie-003:Lux perpetua
Author(s) : Andrzej Sapkowski

But Kindle displays the original metadata... I also tried the binary editor and it seems that original file has one EXTH record, but these 'bad' have two of them, one good, one bad and Kindle displays the bad one.

jindroush · 08-13-2016, 08:46 AM

I played with the files a little bit more by KindleUnpack and it seems the offending files are 'double' format mobi7/mobi8. The metadata are modified by calibre for mobi7:
<dc:title>Husitská trilogie-003:Lux perpetua</dc:title>
but are unchanged in mobi8 (epub?):
<dc:title>Husitská trilogie - 3 - Lux Perpetua</dc:title>
and it seems that Kindle for these files prefers mobi8 metadata...

kovidgoyal · 08-14-2016, 02:59 AM

Updating metadata in joint mobi files is not supported. Either use the KindleSplit plugin or convert them to azw3 first.

jindroush · 08-14-2016, 03:46 AM

Thx Kovid for the reply

could you please elaborate?
a) Are there any plans for it to be fixed someday?
b) If not, would it be possible to do that split automagically on upload to device?

For whatever reasons I want all files stored in Calibre to be the 'original', untouched ones.

kovidgoyal · 08-14-2016, 04:20 AM

No and no. Joint mobis are not original/untouched in any way, they are the output of a kindlegen or calibre conversion

08-13-2016, 08:01 AM	#1
jindroush Connoisseur Posts: 78 Karma: 104 Join Date: Nov 2014 Device: Kindle	Metadata on device different to Calibre I have Kindle Voyage. All my metadata in Calibre are perfect (ie. author name/surname in correct order, series filled in, everything with correct diacritics (using czech language which have many of those)). I use one plugboard for connecting series names to book titles. Sometimes, but only sometimes, this fails and the title displayed on Kindle is wrong. I can't find out the reason. All the cases are stored as MOBI in Calibre, all have the unwanted metadata stored in them and on transfer, althought they're somehow changed by Calibre, the unwanted metadata are used by Kindle, not those wanted. All of these have small 'DOC' displayed to the reading dots in the latest Voyage firmware, but not all which have DOC are these cases. Why, and how can this be fixed? Example: This is mobi file in calibre run through ebook-meta.exe (unwanted) Title : Husitská trilogie - 3 - Lux Perpetua Author(s) : Sapkowski Andrzej This is mobi file on the device (wanted) Title : Husitská trilogie-003:Lux perpetua Author(s) : Andrzej Sapkowski But Kindle displays the original metadata... I also tried the binary editor and it seems that original file has one EXTH record, but these 'bad' have two of them, one good, one bad and Kindle displays the bad one. Last edited by jindroush; 08-13-2016 at 08:47 AM.

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08-13-2016, 08:46 AM	#2
jindroush Connoisseur Posts: 78 Karma: 104 Join Date: Nov 2014 Device: Kindle	I played with the files a little bit more by KindleUnpack and it seems the offending files are 'double' format mobi7/mobi8. The metadata are modified by calibre for mobi7: <dc:title>Husitská trilogie-003:Lux perpetua</dc:title> but are unchanged in mobi8 (epub?): <dc:title>Husitská trilogie - 3 - Lux Perpetua</dc:title> and it seems that Kindle for these files prefers mobi8 metadata...

08-14-2016, 02:59 AM	#3
kovidgoyal creator of calibre Posts: 44,017 Karma: 22669822 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Updating metadata in joint mobi files is not supported. Either use the KindleSplit plugin or convert them to azw3 first.

08-14-2016, 03:46 AM	#4
jindroush Connoisseur Posts: 78 Karma: 104 Join Date: Nov 2014 Device: Kindle	Thx Kovid for the reply could you please elaborate? a) Are there any plans for it to be fixed someday? b) If not, would it be possible to do that split automagically on upload to device? For whatever reasons I want all files stored in Calibre to be the 'original', untouched ones.

08-14-2016, 04:20 AM	#5
kovidgoyal creator of calibre Posts: 44,017 Karma: 22669822 Join Date: Oct 2006 Location: Mumbai, India Device: Various	No and no. Joint mobis are not original/untouched in any way, they are the output of a kindlegen or calibre conversion

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