Quote:
Originally Posted by jhowell
I have been researching causes of failure for the lockscreen cover feature. One thing I found is that the cover image must be JPEG with JFIF metadata. If the image instead has EXIF metadata then the cover will not display on the lock screen.
Some image manipulation software, such as Photoshop Elements, create files with EXIF metadata and will cause problems for this feature.
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Just tried that with a book that caused problems and wouldn't show the cover. Exported the original file with Gimp to a new jpeg, used that as cover in calibre and converted it into a new azw3 file. Now it shows the cover on both the lockscreen and gallery view - so apparently a jpg with exif instead of jfif can mess up a book's gallery view as well.
Thanks a lot - this has been way more of a hassle than I was hoping for.
