Ok guys I got it working thanks a lot!
However I have a last question...
- Not all games support resolutions above 480p (Halo 2 for example). Games that do support 720p (Soul Calibur 2) suffer from pillar boxing (I wonder why though, since the TV's native is 720p, perhaps the games were not designed for 720p but still support it somehow).
Are these problems normal or is there a way to fix them?
I also had a problem with playing videos when on 720p or 1080i but I found the reason in the XBMC faq. Here is an excerpt (for anyone who also wondered why there are problems):
Q: Does XBMC and Xbox support HDTV (High Definition TV) resolutions?, and HDTV media?
A: Yes and no, but the answer is a little more complicated than that, you see: Xbox/XBMC can output 480p/720p/1080i (if you have a High Definition AV Pack/component cable) and upscale all low-resolution videos (like retail DVD-Video/Movies) to 720p (1280x720 pixel progressive) or 1080i (1920x1080 pixel interlaced) in hardware (linear upscale/upconvert). So XBMC have no problems with upscaling example DVD-video (720x480 NTSC/720x756 PAL) movies to HDTV 480p/720p/1080i. XBMC is even capable of playing native HD video (video/movies with native resolutions higher than 720x576) like 720p (1280x720) and 1080i (1920x1080), however there is here a big snag/limitation and that is that a standard Xbox only has a 733Mhz Intel Pentium-III CPU (processor) and that does not have the processing power to decode those native HD video resolutions, and that means you would only get maybe 10fps (frames per seconds) displayed which would appear so jerky because of all dropped frames that it will be un-viewable. The only solution if you want to play videos with native HD resolutions on Xbox is to buy or upgrade to a non-standard Xbox with a much faster CPU (processor), (like example the DreamX-1400 from FriendTech which has a 1480Mhz Pentium-III that is at least capable of decoding native HD videos that are have up to 720p in native HDTV video resolution. FriendTech do offers trade-in). Note! XBMC does not yet have DVD-menu support so note you only get video on DVD-Videos. Note! You must enable/setup your HDTV settings in Microsoft dashboard, (on NTSC Xboxes).
To make this even clearer XBMC capability on a standard Xbox (with Intel 733Mhz PIII CPU):
- 720x480 pixel video output to 480p HDTV (720x480 progressive) = OK! (eg not upscaled).
- 720x480 pixel video output to 720p HDTV (1280x720 progressive) = OK! (eg upscaled).
- 720x480 pixel video output to 1080i HDTV (1920x1080 interlaced) = OK! (eg upscaled).
- 1280x720 pixel progressive video output to 720p HDTV (native 1280x720 progressive) = FAIL!
- 1920x1080 interlaced video output to 1080i HDTV (native 1920x1080 interlaced) = FAIL!
Note! All above that state FAIL don't actually fail to play, it's just that the Xbox CPU is to slow to decode/render the high resolution so it will drop so may frames that is will be un-viewable.
PS! There are not many standalone DVD-players out there that can even upscale normal DVD-movies to 720p or 1080i and those that can are much more expensive than a modded Xbox ;-P
FYI; Microsoft® & DivX® recommend 2.4 Ghz PC + 384MB RAM for 720p MPEG-4 playback!
Thanks for all!