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!
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 The last folio I made in both 1024 and 2048 I finally unpublished the 2048 one due to extremely sluggish performance.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.
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.
I'm just going to tack on another question to this thread: is there any way to disable scrolling between articles? In my folio, each article is in a different language and some top-level navigation controls which language the user wants. Thinking it might save some confusion.
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?
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