Making .mp4 with Actionscript 3 and what to use for 3D animation

Dear user,
I have to load several images and then do 3D image animation.
For this if I use Flash CS4 platform,do I have to use Papervision 3D or other 3D open source classes.
Further,I have to create a movie file which contains all the image animation and allow user to view it.
It is similar to website concept.
So,is it possible to make .mp4 files with actionscript or I have to rely on AIR platform.
Thanks in advance.