Properties of .avi file

Hi, I would like to know what is the maximum size of .avi file to be able to play it in aTV Flash (black) from Time Capsule.

I have 2.42 Gb video file, 1024x432 pixels, data rate 3.06 Mbit/s, xvid, ac3 5.1 and when I want to play it, it crashed after about 10-15 sec every time.

I’ve read somewhere that just .mkv are supported for HD and big files, but I don’t know the exact size…