Quote:
Originally Posted by 93terp
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For the book cover, it needs to be a 450x680 jpg. There's a "Resize Cover" Calibre plugin, and you can customize the plugin to resize all covers to this default value when you run the plugin.
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Quote:
Originally Posted by HarryT
That's a terribly low resolution. If you resize the book's cover to that resolution, it's going to look pretty bad when it's full screen.
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IIRC, the jpeg format can contain both the image and its thumbnail.
Nope, my recall had some noise spikes there.
The jpeg compression is used in some common file formats that contain both the image and its format.
But due to the casual usage of the "jpg" or "jpeg" reference, it still might be the case in what a book cover might contain.
I think that what probably should be done is set the image to an appropriate size (or larger) for full screen use and the contained thumbnail to whatever smaller size is required.