What properties of the Camera are you wanting to convert?

hmm .. all camera motions .. i dont know .. rotation and position ... camera and pivot reference?

What properties of the "+origin prop" (whatever they are!) do you want to convert?

Origin prop in scene (to 3d null object in After effect)

 

It is possible, within the restrictions of AE's notion of 3d; but I doubt anyone has a handy script close nearby.

i know about a script python blender to after effect ..

 

May I ask. Why do you want to perform this export/import?

Just i like the make the animation and render in poser and make the compositing in AE but with the same camera of poser so i can add 3d layer ;-)