export setup for apple tv 3 1080p

hi, I have last version of aperture, I create my slideshow and I want export file in Itunes and watch movie with my apple tv 3, and I cant find correct setup, there is only for apple tv 720p, I try hd 1080 setup but file create is very large 35Gb, I try custum setup but is impossible found a compatible setup for apple tv!!!

I Imovie is possible and in aperture not?

I have only 2 solution, firsth, export file in 720p, second export file in hd1080, import file in imovie and with imovie create a file in 1080p for my apple tv3.

it is correct or there are another solutions?

thanks

mauro