[mythtv-users] Blending/spanning two crt projectors using myth and nvidia nview

[Gene Stapp]

I checked the archives and couldn't find anything current on this 
subject so I'll go ahead and ask.
I currently have two sony vph-1272q projectors. Their maximum resolving 
resolution is 660p but 720p looks good albiet a tad soft (I havn't felt 
like going through the 12 hour ordeal of totally converging everything 
yet since I moved) with a max resolution of 1600x1200... I'm looking at 
either horizontally spanning them, which would create a max displayable 
resolution of 1200p or rotating them 90 degrees so that my new max 
resolution when the two projectors pictures are combined would be 
2400x1600 :)  . Both of these options would use a 16:9 display mode. I 
checked with the foremost authority with crt's on this and it is 
possible to span them so I am totally stoked...

I'm going to try this setup with a overclocked 3200+ mobile (to 2.6ghz) 
and a 6800gt nvidia card. I looked through the search lists and it 
appears mythtv can output spanned content, but is there a performance 
hit and would I be better off using xinerama instead of nvidia nview for 
the spanning? Is there something I need to do with myth to enable 
spanning or does the video card drivers .conf file handle that without 
myth knowing. I found some previous threads from 2003 where spanning was 
turned off by default.

Also what is the max resolution anyone has been able to run HD content 
in because the sky is the limit with this setup if it works correctly. I 
assume with XvMC support turned on the graphics card is the limiting 
factor? The HD content would be converted usually from 1080i but some 
720p native movie content would also be used.