Post

7 followers Follow
4
Avatar

Concern about mib file size

Hi again,

We are creating an e-book for kids with 30 chapters and currently having texts / pictures / few html test content and the retina mib file size is over 500 MB. Looking at the verticals architecture showing images for Retina and double less images for iPad 1 and 2.

What's the file size for a person downloading the e-book? I'm wondering does it recognizing the device and downloading the files that are actually needed? What's the best optimal size of the downloadable mib?

We have all image files optimized for Retina and html folder contains only needed assets. We are reviewing/pushing with iPad 2 and Retina and both showing the same mib size.

Regards, ken

Ken Juks Answered

Please sign in to leave a comment.

12 comments

0
Avatar

My iPad mib is around 300mb which means the Retina will be over 600mb! This is definitely going to be too big for anyone to download.

I have 3 embedded videos, images and a few simple htmls. 

What features can be adjusted to decrease the mib file size? Do we need to repro the images to make them smaller in file size or does this not affect the mib file size?

Please help - we need to sort this out ASAP

Thanks

hannah dossary 0 votes
0
Avatar

I never got an answer from Mag+ to my question neither found explanations from helpdesk. But as far I understand there's nothing to do about it. The final mib contains mainly images, also text is png-file. Videos and html content will remain as they are. The full screen image for Retina is 2048x2048 @ 264 dpi. That is a large image file. The longer vertical, the larger file size.

You can just double check the followings:

1) replace the png's with jpeg's in your design if possible and reduce the file size to level 10 or more (12 is the max as you may probably know). I prepared the jpeg's and turned off the 'Downscale images using Photosop' option from Mag+ indesing plugin when exported the vertical. That worked best for me.

2)  for video inputs we have used mp4 with h264 codec finding the compromise on quality and file size.

3) consider to link some large content items, videos etc to online. Customer can't see that when offline. That's a loss actually.

4) check that html folder doesn't contain irrelevant content, Photoshop psd files etc. All these unnecessary files will be included to final mib.

 Regards, ken

Ken Juks 0 votes
0
Avatar

Hi! Somebody find other tips to decrease the mib file size? I've the same problem.

bests, Christian

christian.serra 0 votes
0
Avatar

For me http://imageoptim.com/ worked great. 

After exporting all verticals i select all PNGs and JPGs and drop them to ImageOptim. There is no visible difference exept the file size afterwards so i can definitely recommend it. (just make sure to speed it up in its general settings before you use it on all your image files or it can take quite a while to compress). 

In a 60 MB MIB I usually save around 10-15 MB. 

Hannah Libea Leat 0 votes
0
Avatar

Hannah Libea Leat, THANK YOU! ImageOptim is AMAZING! took a 28MB file down to 14MB. 

however, i am having trouble re-zipping any MIBs back to their original state. using ImageOptim, or just re-zipping an untouched MIB, both result in "corrupt MIB." hmm... will try everything i can, because the size savings are too good to pass up. 

 

paul seymour 0 votes
0
Avatar

hello nathan, 

actually, the 28MB file above, was reduced by the MIB optimizer down from 60~MB. so, to go down 50% twice, is pretty stunning. so, my aim is to use the "official" iOS optimizer, then run ImageOptim after that. however, i still can't figure out how to re-zip the archive back to a MIB. something seems to have changed, as this post is actually half a year old. i'm hoping for a solution, because WiFi or not, fast downloads are key to the UX of a digital magazine. 

thanks for the suggestion. 

paul seymour 0 votes
0
Avatar

To re-zip your MIB file select the "verticals", "issue.xml" file and the "issuepreviews.zip" file (if there is one) and compress to a zip.  Then rename the .zip to .mib and that should do it.  

We are not familiar with http://imageoptim.com but if you're getting an error when repackaging the .mib file it may be related to something that that compression application is doing to your files.

Regards,

Mike Rettew 

Mag+ Support Team

Mike Rettew 0 votes
0
Avatar

hello, that was exactly the problem - i was trying to recompress the folder itself, not the files within the folder. thanks!

however, sad to report - after the MIB worked fine (i.e. not corrupt), using the ImageOptim app, as mentioned above, caused some of the PNGs to not show up. maybe there might be some specific settings, so i will keep fiddling around with it. anything that can squeeze down the file size of issues is a big plus. thanks!

paul seymour 0 votes
0
Avatar

I am repurposing my iPad app for Android and just discovered that Google Play has a 50MB file limit(!)

My MIB file is 191MB. Just tried ImageOptim but it didn't work, and Mag+ says not to use their optimizer for Android apps. Has anyone had any success reducing a large Android MIB? Of course, like all requests in our business, this one is urgent. : ) Thanks!!

Maureen Gregory 0 votes
0
Avatar

Maureen, google play allows you to upload expansion files a long with your APK. When you build your app you will get a relatively small apk file (around 5mb). When you upload your app, there will be an option to add an expansion file when uploading the apk, this is where you upload the .mib file. When it installs, the app will automatically check for expansion files. You may need to add your apk twice to get the expansion file option to show.

nadia 0 votes