I played with SWF format (trying to get an Actionscript solution for online SWF manipulation/authoring).
Here you can find a sample AIR application to extract all images from any swf file and a source example with main Actionscript functions for SWF format parsing:
http://flashpanoramas.com/blog/2007/07/02/swf-parser-air-application
I believe this will be useful for someone…
