05-02-2015, 07:53 PM | #16 | ||
just an egg
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Only Amazon relies on an external server to download cover thumbnails. Why? I can't imagine it's because they can't figure out how to extract the cover from the ebook and shrink it the way epub readers do. I was actually shocked and befuddled when I got my first Kindle and discovered this was the Amazon way. Quote:
In any case, if you have a lot of books, looking up the ASIN for each and every one would be a major pain in the you-know-what, and while the Calibre metadata download option can help automate the process, I find it doesn't always work. Glad you found a method that works for you! |
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05-03-2015, 12:01 AM | #17 | ||
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One would hope at least, if speed was their motivating factor, that it would first check for a downloadable copy and then fall back on extraction. This would be much faster for books that did come from Amazon but were downloaded and added to the Kindle via USB... which also suffer this problem. Extraction is way way WAY quicker than waiting an indeterminate time for an internet connection to be activated. |
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05-03-2015, 12:28 AM | #18 |
just an egg
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Only if you use Calibre to manage your library, which I don't
Last edited by odamizu; 05-03-2015 at 05:39 PM. |
05-03-2015, 03:44 PM | #19 |
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If the thumbnail is for a book which isn't on device but only in the cloud they have to use a different method, so the chap in charge of coolness decided to standardise so it was always done the same way.
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05-03-2015, 05:53 PM | #20 | |
just an egg
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Though doesn't Nook show covers for cloud books (or "archived" books in Nook lingo) while still pulling covers for on-device books from within the ebook? It's been a while since I played with a Nook, so my memory could be faulty. |
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05-03-2015, 08:38 PM | #21 |
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It would be perfectly reasonable to use extraction as a fallback option -- like I said already, it would certainly be a lot faster if the Amazon-sourced book was downloaded from a computer and sideloaded.
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05-04-2015, 03:33 AM | #22 |
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I don't know. I have a lot of Delphi Classics, some of which are 25.000+ pages, such as the Anthony Trollope one (using my own setting of 2400 characters per page). When opening them using the calibre viewer, it takes a LONG time, and this is a desktop computer. I assume calibre is extracting the book and completely loading it into memory. (I'm opening the EPUB version, by the way.)
The Kindle opens the converted AZW3 version instantaneously, so it is not extracting the entire book. Maybe it's possible to extract only the OPF/NCX files, and then only extract the files one by one during reading. Or something... |
05-04-2015, 11:00 AM | #23 |
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Yep, and same goes for just extracting the cover resources.
(calibre, a piece of desktop software, presumably assumes people have the necessary RAM and CPU to preload everything.) |
05-04-2015, 11:58 AM | #24 |
just an egg
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I can understand (sort of) wanting to standardize how covers are handled, i.e., downloading from server so that covers from books on device and covers from books in cloud are handled the same. But I don't buy that it's too much effort or time-consuming for a Kindle to extract a cover from within the ebook file.
On my Sonys, when you add a book, it takes maybe 2 seconds for the reader to extract the cover and create a thumbnail, which is then stored in a separate thumbnail folder. This happens only once, the first time the book is added. |
05-05-2015, 12:41 AM | #25 |
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I have a couple of Personal Document books that do show cover thumbnails on my PW1. I have never bothered to try to figure out why, as I don't use Cover view on that device. calibre never touched them. I think there may be a 'magic' cover resolution that will get thumbnail image generated, at least that used to be the case on Fire.
Thumbnails show for all of the books on my Fire HD6 (and ios, android) once they're downloaded (except Fire only shows them in Collections, Carousel, and task switcher, not in Docs view). |
05-05-2015, 10:48 AM | #26 |
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Persona Documents (has Personal banner and might appear under Docs filter) always have covers extracted on E-Ink. Dunno how the Fires may differ, but this much at least is likely to be the same.
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05-07-2015, 02:44 PM | #27 | |
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Shari |
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05-07-2015, 04:45 PM | #28 |
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AFAIK personal documents don't use cover declared in EPUB but a special thumbnail (very small one) made during MOBI conversion.
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05-07-2015, 05:06 PM | #29 | |
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Shari |
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05-20-2015, 05:50 AM | #30 |
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depends on a set of conversion, if you use calibre program, in the edit conversion, remove the flag on a shared document, and your personal documents will appear with a large cover, without written personal document.
summary: open calibre, edit metadata, remove the check mark for share, converted to mobi or azw3, and you will appear as if it were an original book by amazon. Last edited by fendesa; 05-20-2015 at 05:54 AM. |
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cloud, covers not displaying, kf7, kf8 |
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