08-23-2009, 09:40 AM
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#1 |
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Enthusiast
 Posts: 42
Karma: 14
Join Date: Jul 2009
Device: dr800sg
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Comic to lrf and ebup
Hi,
I recently got a PRS-505 and I begin reading comics on it. I know that the format preferred by Sony is the lrf format, but that you said that epub is better and will be the next format. So I tried to convert a comic in epub and lrf and send it to the device. First of all, changing page in the epub format take longer. Secondly, the image look worse. I tried to open them in calibre internal viewer. You can see that the image are not render the same way. I attach the two viewer image so you can see (Left is epub, right is lrf). For the time to change page, is not so a big difference, I can live with it. It's probably the reader that is made principaly for lrf. For the image, small text become unreadable in epub. Is the conversion different, or is it the viewer that interpret it differently? Should I continue to convert is lrf to have better result or is there an option I haven't seen? Thanks Edit: Forget to say I use calibre 0.6.6 on ubuntu 9.04 (jaunty) in 32bits. |
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08-23-2009, 11:45 AM
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#2 |
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creator of calibre
 
Posts: 43,858
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Did you set the output profile to SONY?
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08-23-2009, 12:40 PM
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#3 | |
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Enthusiast
Posts: 42
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Device: dr800sg
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Quote:
The conversion are done the same way, for the epub one, i just choose epub of the combo box on the top right of the conversion windows (without changing parameters the two times). Plus, in the welcome wizard, I say my device is a prs-505 |
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08-23-2009, 12:44 PM
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#4 |
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creator of calibre
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Post the log from the conversion to EPUB (You can get it by clicking the rotating hourglass and clicking job details)
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08-23-2009, 12:49 PM
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#5 |
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Enthusiast
Posts: 42
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Device: dr800sg
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I closed calibre since a begin this post. So I reopened it and reconvert the book.
This is the log of the conversion to epub: Spoiler:
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08-23-2009, 01:09 PM
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#6 |
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creator of calibre
Posts: 43,858
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Location: Mumbai, India
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Unzip the EPUb, what size are the image files (i.e. what resolution)
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08-23-2009, 01:27 PM
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#7 |
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Liseuse Lover
Posts: 869
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Location: Netherlands
Device: PRS-505
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Hey Kovid,
I recently opened a ticket for this issue (comic conversion looks worse on epub) and you closed with a "works for me" - could it be there is a difference between conversion on linux and conversion on windows? I have my output profile set to Sony too (by default) and I was converting on my work (Windows) machine. I'll try to convert that same thing on my home (Linux) box and see what happens. |
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08-23-2009, 01:40 PM
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#8 | |
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Enthusiast
Posts: 42
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Join Date: Jul 2009
Device: dr800sg
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Quote:
It also seem that it create a single xhtml file per image. This probably doesn't change anything for the image aspect, but may be the cause of the slowndown of the device? Found an option to split larger html file. Set to 260 kb by default. Since that more than 2 images, should I put it up when using comics? Last edited by Landrovan; 08-23-2009 at 02:32 PM. |
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08-23-2009, 02:33 PM
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#9 |
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creator of calibre
Posts: 43,858
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Join Date: Oct 2006
Location: Mumbai, India
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There shouldn't be any difference between linux and windows. I tested it on linux, where it worked, but the code that runs is the same in both cases.
@Landrovan: One more test. Run the command lrf2lrs on the generated LRF file. It will extract the images. Compare the images with the ones from the EPUB (are they identical?) I'm trying to determine if the loss of quality is being caused by your device trying to resize the images when given an EPUB. |
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08-23-2009, 03:12 PM
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#10 |
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Enthusiast
Posts: 42
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Join Date: Jul 2009
Device: dr800sg
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I test two images from the epub and the output of lrf2lrs and they seem really similar. The problem seem not to be the modifying of images. Like acidzebra said, it's probably a difference between the way images are rendered depending on the input formats in the reader.
Can it be a difference in the way image are added to the book. I know that epub is only html, and that you put style on the body, div and img tag. Those style are in stylesheets.css like a normal html page. Can those style be not excatly the same as the one use for the lrf (if he use html). Like one says autosize and not the others... |
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08-23-2009, 03:14 PM
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#11 |
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creator of calibre
Posts: 43,858
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Join Date: Oct 2006
Location: Mumbai, India
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Hmm well the problem is that your readers seem to be resizing the EPUB images. Unfortunately, on my 505, the EPUB works well, so it's difficult for me to tell what could be causing the problem. I can only suggest that you play around with the HTML/CSS until you find whatever is causing the problem on your readers.
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08-23-2009, 03:18 PM
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#12 |
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Enthusiast
Posts: 42
Karma: 14
Join Date: Jul 2009
Device: dr800sg
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Ok thanks!
I think I will just stick to lrf for now. (I don't really want to play with stylesheet). |
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