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Old 10-07-2012, 11:43 PM   #1
maranium
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Resolution problem

I have a bit of an odd problem. I have many books, converted from cbr to epub, that I have used on all my previous Kobos. They have worked wonderfully, but when I bought a Kobo Glo a couple days ago, and tried loading them on, the images appear smaller. The Glo, with its higher resolution then previous incarnations, does not appear to be scaling the images to fit the screen. I have tried reconverting a book, using different settings, and it always ends up the same, big white borders on the sides and below the image. I have also been in touch with Kobo, who seem to be misunderstanding my problem. I don't think it is an issue with the books, I think the image size for an epub is the same no matter what. Any suggestions/inputs?
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Old 10-07-2012, 11:59 PM   #2
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I don't know that much about the comic conversions, but...

Did you choose "Kobo Reader" for the output profile? If so, the images will be converted to smaller than would be ideal for the Glo. Try the KindleDX output, as it sets comic resolution to 771*1116. Or use Tablet as that doesn't change the size of the images at all.
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Old 10-08-2012, 12:19 AM   #3
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Hey I just tried that and it partly works! The only problem is that tablet is still kinda too small, and DX is too big. Just need to find one in between, or hope that a proper output setting will be made
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Old 10-08-2012, 12:26 AM   #4
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Quote:
Originally Posted by maranium View Post
Hey I just tried that and it partly works! The only problem is that tablet is still kinda too small, and DX is too big. Just need to find one in between, or hope that a proper output setting will be made
Open an enhancement request. If possible do include the resolution needed.
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Old 10-08-2012, 12:37 AM   #5
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This seems to be the only way to go, except it will cause my library to grow in size by perhaps a little too much. I already use a 32 GB SD card, filled with about 23 GB of books this style. I think I am going to have to give up on using a Kobo Glo
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Old 10-08-2012, 12:44 AM   #6
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I took a quick look through an older version of calibre's source.

Here are the Profiles and screen sizes

Spoiler:

Code:
	Line 225: class OutputProfile(Plugin):
	Line 239:     comic_screen_size = (584, 754)
	Line 273: class iPadOutput(OutputProfile):
	Line 280:     comic_screen_size = (768, 1024)
	Line 435: class iPad3Output(iPadOutput):
	Line 437:     screen_size = comic_screen_size = (2048, 1536)
	Line 444: class TabletOutput(iPadOutput):
	Line 450:     comic_screen_size = (10000, 10000)
	Line 452: class SamsungGalaxy(TabletOutput):
	Line 457:     screen_size = comic_screen_size = (600, 1280)
	Line 476: class KoboReaderOutput(OutputProfile):
	Line 484:     comic_screen_size         = (536, 710)
	Line 498: class SonyReader900Output(SonyReaderOutput):
	Line 505:     screen_size               = (600, 999)
	Line 506:     comic_screen_size = screen_size
	Line 515: class GenericEinkLarge(GenericEink):
	Line 521:     screen_size               = (600, 999)
	Line 522:     comic_screen_size = screen_size
	Line 533: class SonyReaderLandscapeOutput(SonyReaderOutput):
	Line 542:     comic_screen_size         = (784, 1012)
	Line 588: class CybookG3Output(OutputProfile):
	Line 596:     comic_screen_size         = (600, 757)
	Line 641: class KindleDXOutput(OutputProfile):
	Line 650:     comic_screen_size = (771, 1116)
	Line 665: class KindleFireOutput(KindleDXOutput):
	Line 673:     comic_screen_size = (570, 1016)
	Line 681: class IlliadOutput(OutputProfile):
	Line 688:     comic_screen_size         = (760, 925)
	Line 693: class IRexDR1000Output(OutputProfile):
	Line 702:     comic_screen_size         = (996, 1241)
	Line 707: class IRexDR800Output(OutputProfile):
	Line 716:     comic_screen_size         = (768, 1024)
	Line 721: class NookOutput(OutputProfile):
	Line 730:     comic_screen_size         = (584, 730)
	Line 735: class NookColorOutput(NookOutput):
	Line 741:     comic_screen_size         = (594, 900)
	Line 744: class BambookOutput(OutputProfile):
	Line 754:     comic_screen_size         = (540, 700)
	Line 759: class PocketBook900Output(OutputProfile):
	Line 766:     screen_size               = (810, 1180)
	Line 768:     comic_screen_size         = screen_size


Why not have more than one SD card?
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Old 10-08-2012, 12:46 AM   #7
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The Glo is 758 x 1024. So close. And yeah, can always have another SD card, just not preferable.
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Old 10-08-2012, 01:02 AM   #8
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Actually it appears I can convert the books to PDF, at the correct resolution. Then it work on both old and new devices, and doesn't seem to increase the file size by any detrimental amount
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Old 10-08-2012, 01:39 AM   #9
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I've read the rest, but this is the one I want to comment on...

Quote:
Originally Posted by maranium View Post
Hey I just tried that and it partly works! The only problem is that tablet is still kinda too small, and DX is too big. Just need to find one in between, or hope that a proper output setting will be made
What resolution are the images you are starting with? The "Tablet" profile shouldn't change the size at all. And I thought the KindleDX would shrink them, but not enlarge them.

I had a look through the current source and found:

- iPad - 768*1024
- GenericEinkLarge - 600*999

And as PeterT said, put in an enhancement request for a size you think is right.
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Old 10-08-2012, 04:02 AM   #10
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Maybe the Kobo can handle 64Gb cards ?
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Old 10-08-2012, 11:05 AM   #11
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So far converting cbrs to pdf has worked for getting over the screen issue. But the new problem I am running into is changing epubs into pdf. A lot of my library was changed into epubs, and then i deleted the old cbrs to save hard drive space. Now i can't seem to convert them in a way that will expand the images to fill the screen, even if i convert them into epub for a larger device
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Old 10-08-2012, 12:48 PM   #12
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With the ePub files, it would've converted then to 600x800 resolution pictures, so up scaling them won't work well. You needed the original files to let you create a 758x1024 version. Not much I can suggest except to live with the pictures being smaller, unless you kept backups of the originals somewhere.

And the Glo is specked up to 32gb MicroSD cards only, ATM.
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