Using The loader class of Adobe Flex, I load an external SWF file. However, the loaded SWF file has a different frameRate than my application.
Is it possible to have both the parent app and the loaded child app playing at different framerates? If so, how?
It’s not possible.
There are two ways around this, change the framerate of the main swf to match the loaded one (this can be done during runtime) or decouple the animation from actual frames and use events to step it forward.
If you decide to use events to drive your swf in order to approximate different frame rates I’d recommend using a tween engine like TweenLite/TweenMax.
It’s free (as in beer) and I’ve used it very successfully for frame based tweening in the past.