(2012-05-02 18:27)Jean-Max Wrote: (2012-05-02 10:47)Ned Scott Wrote: XBMC doesn't use iTunes on the desktop at all.
Thanks for your reply 
Yes, I know that XBMC doesn't use ITUNES
.. but my question "out of XBMC subject" was about ITUNES itself in MAC world :
-> Can ITUNE be set to store HD 1080 videos with a compression not so degrading ? (*)
Nb: When ATV3 will be jailbreaked (nothing is impossible), installing XBMC on ATV3 and reading the distant 1080 HD videos stored on the distant networked MAC would be the final solution
But actually, and waiting this future time, it would be useful to try to have better HD 1080 videos through the actual ATV3.. (*)
Thanks for any ideas and for MAC lovers experiences 
iTunes doesn't set the compression of videos, or change the video when you import it into the iTunes library. There are no settings to do what you're asking because it's not a function of iTunes. You can configure what resolution of videos you'd like to get when you rent/buy movies from within iTunes. So that if you buy a movie, you can specify whether you want it in 720p or 1080p. But regarding your existing movies not acquired through iTunes, the iTunes app doesn't/cannot do anything to the quality.
And don't confuse "resolution" with "quality". 720p and 1080p refer to the resolution (shape and size) of the video, not the quality. The quality is determined/set by whatever program was used to rip the movie in the first place. So if you don't like the quality of the movies, you'll have to re-rip the movies again from the source. If you used a program like Handbrake to rip the video from say a retail Bluray disc, you would specify in Handbrake what video quality you would like the video to have. Obviously the higher the quality, the bigger the file size, and the longer it will take to rip. If it's not good enough after ripping it, you'll have to redo it with higher quality settings.
So if you want "better HD 1080 videos", you'll have to re-rip them from the source. iTunes won't help you.
Also, keep in mind that you don't need iTunes to play videos from a remote networked Mac. For that, all you have to do is setup a network share on the remote networked Mac, and tell XBMC to look at that specific remote share for videos. No iTunes necessary.