i just bought a new ATV and want to stream HD videos from my TC. I've flashed my ATV to install Boxee and XBMC. After this i tried to stream videos i stored on my TC, wich are 720p *.mkv-files. It's working, but i still get a lot of jerking. So what can i do to run my videos fluently? Should i convert it into an other container-format like MPEG e.g.?