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JButler20
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JPG Folio Sluggish

Sep 12, 2012 11:36 AM

Wondering if anyone can offer some insight...

 

I've got a 2048x1536 horizontal-only folio set up with 5 articles. Each article has 6 pages in it. In testing originally with a "live" InDesign document, the folio was very sluggish when it came to scrolling vertically through the pages. I figured it might have been an issue with having to load the different items individually so I exported out each page as a high quality jpeg and reimported them into the folio. That is how it is currently set up.

 

Each jpeg is around 500-700kb and when I publish to the iPad, the vertical scroll issue is the same. It stutters/takes 2-3 seconds to load vertical pages. In running some tests, I'm wondering if there is a maximum number of pages you can have in each article. I have two sections uploaded currently and the filesize for the folio is only 7mb. The scrolling worked fine when I uploaded the folio with png compression but it ballooned the file size quite a bit.

 

Any thoughts would be appreciated!

 
Replies
  • Currently Being Moderated
    Sep 12, 2012 11:42 AM   in reply to JButler20

    JPEG is about the slowest possible option you can select for high-res ipad content. The JPEG decoder provided by iOS is, ah, pokey. You are much better off publishing as PDF.

     

    Neil

     
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    Sep 12, 2012 12:42 PM   in reply to JButler20

    I have excactly the same experience. The last folio I made in both 1024 and 2048 I finally unpublished the 2048 one due to extremely sluggish performance. Might've been because of jpeg compression. I'll try republishing it as pdf instead.

     
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    Sep 12, 2012 12:48 PM   in reply to eddie_dps

    It's just not a good idea to use JPEG as the format for high-resolution iPad content. The device and OS are not well-suited to JPEG decoding and you see the impact in the folio experience. Use PDF instead and you will have better luck.

     

    Neil

     
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  • Currently Being Moderated
    Sep 13, 2012 10:19 AM   in reply to Neil Enns - Adobe

    Neil

     

    Is there somewhere on the site here that will tell us what settings are being used to create the PDF's?  And is PNG the most effecient size/speed for 1024 ipad rendition?

     

    Thanks

    Chris

     
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    Sep 13, 2012 11:25 AM   in reply to JButler20

    There is no way to disable swiping between articles.

     

    Neil

     
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    Sep 13, 2012 11:26 AM   in reply to Neil Enns - Adobe

    I would publish as PDF for 1024 as well. You get quite a bit of file size savings. What PDF settings exactly are you asking about?

     

    Neil

     
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  • Currently Being Moderated
    Sep 13, 2012 3:15 PM   in reply to Neil Enns - Adobe

    Neil,

     

    We're just getting ready to launch a new large magazine and want to make the right design choices.  But we were wondering how when making PDF's DPS is deciding:

    compression size and type, downsampling, whether jpeg quality is maintained, whether font sets are included? etc, etc.

     

    These are all things you can normally control when making PDF's.  What are the settings that are being used?  and can they be changed or is this something that may not be available until future release?

     

    Reason being: can we downsample the images to twice the resolution of a retina display?

     

    Thanks

    Chris

     
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