For those looking to optimize file‐size inside (and outside) of your Flash movie, I have done a fairly in‐depth amount of research into which formats Flash handles best once loaded into the main timeline. While I know that many no longer do this, it is ideal for those of us who still do animated presentations on the timeline. I was always under the impression that PNG‐24 was the smallest file‐size on publish, but I was wrong.
After extensive testing, a flattened LZW TIF with default Photoshop se6ngs seemed to compress the best for images without transparency & take up the least amount of filesize on disk. But, for those transparent image needs PNG‐24 (using the Save for Web dialog) won out.
I also noticed, just switching the AS library from 2 –3 barely increased filesize on publish as well. The same was true with activating JPG de‐blocking.
Obviously, if you are remotely loading your images, the smallest file‐size image wins that test.
Get the PDF of the breakdown here.
Tags: compression, documentation, filesize, flash