I’m preparing a presentation which consists almost exclusively of photographs with captions… no videos, no animations, very little text, simple transitions. I’m using Keynote ’09 version 5.1 on the Mac as a glorified 35mm slide carousel.
The file is 188 MEGAbytes.
Which is absurd. There are 70 slides. I manually shrunk all the source images to 1024×768 in Acorn before pasting them into Keynote. So if the whole darned thing were stored as uncompressed 1024x768x24bit images, it’d be “only” 165 megabytes. Since compression exists, it should be a lot smaller.
Keynote’s “Reduce file size” option says “can’t be reduced any further.” Doing a “Save as…” under a new name results in the identical 188 MB.
Well, what the heck. Disk space is cheap, so I shouldn’t sweat it, right? Even though I still have in my possession several working external hard disks which are significantly smaller than 188 MB.
But… I want to use this presentation with Keynote on my iPad.
- Can’t email a file that size.
- Can’t use Dropbox (crashes).
- Can’t use iWork.com (crashes).
- Can’t use iDisk (don’t have enough space free, and I suspect it would crash as well).
- Can’t use a USB drive (Steve Jobs thinks I don’t need one on my iPad).
- Can’t use iCloud (I’m not a developer and don’t have it yet).
- Inconvenient to use iTunes and a USB cable (my iPad is synced to my home Mac, and I was trying to do this at the office).
So I really do need to shrink it down.
Exporting it to PDF results in a filesize of 65 MB… a 2/3rds reduction.
To add insult to injury, I tried exporting it to PowerPoint then re-importing it as Keynote. That results in a 56 MB Keynote file! Which happily transfers over Dropbox. And even with 70% fewer bits, even the detailed images look great on the iPad screen.
So I’ve solved my immediate problem, but I still don’t understand what the heck Keynote is doing with all that disk space! Transmitting secret steganographic copies of WikiLeaks? Any ideas?