Crappy epubs not showing covers?

arooni · 06-24-2020, 02:48 PM

Sometimes I see

(no book information, too many interruptions or crashing) under an epub

this seems to have the title of the book, # of pages, progress and size. But missing the cover page.

most of my other epubs seem to have covers so i'm guessing this is just a case of a poor quality epub not rendering as expected. the book opens fine and without issue.

the epubs themselves seem to have covers on the first page or so when you open them.

not really a huge issue but i do like seeing a sea of covers in the history view. i guess the solution is: "arooni get better epubs" lol

Frenzie · 06-24-2020, 03:32 PM

Covers are a thing that the EPUB declares in metadata, not simply the first page. I'm guessing they don't do that.

NiLuJe · 06-25-2020, 12:58 AM

There used to be an issue on Kindle where the metadata parsing went kablooey on the first KOReader boot after a fresh install, which could lead to a few "metadata parsing crashed" entries.

Been a while since I checked, though, so, probably broken metadata.
FWIW, we should be honoring the time-honored ePub 2 tradition (as defining a cover isn't in the specs, *sigh*) required by every content distributor out there, and the actual specs (finally) for an ePub 3.

JSWolf · 06-25-2020, 04:51 AM

Sony Readers take the cover from the first page of the ePub. It worked really well.

JSWolf · 06-25-2020, 05:14 AM

Where are these crappy ePub coming from?

hobnail · 06-25-2020, 03:10 PM

I don't know if this is related to your problem but I use the Calibre plugin Generate Cover for books I've made. Someone here suggested running Calibre's Polish books plugin after using Generate Cover (for reasons which I've forgotten). So now I always do that. (And being superstitious I now also run the Modify ePub plugin as well as part of my final voodo.)

JSWolf · 06-25-2020, 03:16 PM

Quote:

Originally Posted by hobnail

I don't know if this is related to your problem but I use the Calibre plugin Generate Cover for books I've made. Someone here suggested running Calibre's Polish books plugin after using Generate Cover (for reasons which I've forgotten). So now I always do that. (And being superstitious I now also run the Modify ePub plugin as well as part of my final voodo.)

There is no reason to Polish after using Generate Cover. The best way to add the cover is do a search for the cover and if you find a cover you like at a high resolution, you can just double click the cover and then you can change the cover with Modify ePub. This way, you don't need to use Generate Cover and Polish.

mzel · 07-05-2020, 10:14 PM

I see the cover page issue on Kobo. Some books correctly show covers in nickel, but not in koreader

06-24-2020, 02:48 PM	#1
arooni Addict Posts: 315 Karma: 26 Join Date: Jul 2012 Device: Kindle Paperwhite 4 (2018)	Crappy epubs not showing covers? Sometimes I see (no book information, too many interruptions or crashing) under an epub this seems to have the title of the book, # of pages, progress and size. But missing the cover page. most of my other epubs seem to have covers so i'm guessing this is just a case of a poor quality epub not rendering as expected. the book opens fine and without issue. the epubs themselves seem to have covers on the first page or so when you open them. not really a huge issue but i do like seeing a sea of covers in the history view. i guess the solution is: "arooni get better epubs" lol Last edited by arooni; 06-24-2020 at 03:44 PM.

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06-24-2020, 03:32 PM	#2
Frenzie Wizard Posts: 1,619 Karma: 724945 Join Date: Oct 2014 Location: Antwerp Device: Kobo Aura H2O	Covers are a thing that the EPUB declares in metadata, not simply the first page. I'm guessing they don't do that.

06-25-2020, 12:58 AM	#3
NiLuJe BLAM! Posts: 13,477 Karma: 26012494 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	There used to be an issue on Kindle where the metadata parsing went kablooey on the first KOReader boot after a fresh install, which could lead to a few "metadata parsing crashed" entries. Been a while since I checked, though, so, probably broken metadata. FWIW, we should be honoring the time-honored ePub 2 tradition (as defining a cover isn't in the specs, sigh) required by every content distributor out there, and the actual specs (finally) for an ePub 3.

06-25-2020, 04:51 AM	#4
JSWolf Resident Curmudgeon Posts: 73,983 Karma: 128903378 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	Sony Readers take the cover from the first page of the ePub. It worked really well.

06-25-2020, 05:14 AM	#5
JSWolf Resident Curmudgeon Posts: 73,983 Karma: 128903378 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	Where are these crappy ePub coming from?

06-25-2020, 03:10 PM	#6
hobnail Running with scissors Posts: 1,552 Karma: 14325282 Join Date: Nov 2019 Device: none	I don't know if this is related to your problem but I use the Calibre plugin Generate Cover for books I've made. Someone here suggested running Calibre's Polish books plugin after using Generate Cover (for reasons which I've forgotten). So now I always do that. (And being superstitious I now also run the Modify ePub plugin as well as part of my final voodo.)

07-05-2020, 10:14 PM	#8
mzel Connoisseur Posts: 92 Karma: 10 Join Date: Apr 2016 Device: Kobo Forma	I see the cover page issue on Kobo. Some books correctly show covers in nickel, but not in koreader