Quote:
Originally Posted by davidfor
I checked a few books that I have like this. They all show the covers on my devices.
This can work, but, it depends on how old the backup was. And what changed in between. I wouldn't expect the ids for covers for purchased books to change, but, it isn't something I have really checked.
The book is described by the row in the content table with "contentType=6". The column "Title" is what I usually use when searching for a book. The "ImageId" is used as part of the filename of the covers. You will need to do a search to find the actual file. My Kobo Utilities plugin does have a function to open the directory holding the cover image for any book on the device. You can use this to check if the cover image is on the disk when it disappears, and what it now looks like.
If the database isn't being corrupted, then I don't know. If it was something that happened after a while of use, I would suspect it was memory leak or other bug triggering the loss. But, unless the database is being updated, the image id should be recovered after the power cycle. Otherwise, something would have to be removing the actual file.
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Thank you for all this information.
I will try with your proposals.