In this little how to I will show you have to make the most of Flash 8’s transparency. This is only supported with the new Flash 8 video codec ON2 VP6. I have created a little example output here. This is 2 different FLVs one in one layer of the SWF the other on the next layer.
First key out whatever you want transparent in After Effects (a great keying plugin to use is The Foundry Keylight)
Render the movie out of After Effects (control/command M)
Settings for render
click on the word lossless
make sure you use quicktime as you output format
set your compressor to Animation
be sure to set your channels to RGB + ALPHA
Click OK, next click Render
Now in the Flash Video Encoder application that comes with Flash 8 Professional click add to add the video you just rendered out of After Effects.
Once added click on settings
Click show advance settings
Click the little check box next to Encode alpha channel
Click OK, next click Start Queue
You now have a Flash FLV with transparency.
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