Mark Coniglio
TroikaTronix
/ Moderator
Apr 25, 2007, 4:22 AM
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Video Cards on G5; 8 Channels Video?
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[I am posting this email exchange with a potential user here for everyone's benefit -- Mark]
hi, i am thinking about using isadora for a this fall... i have a dual processor G5 and wanted to use up to 8 projectors....
so, i am wondering if you have a dual DVI graphics cards to recommend? i realize we may have to rent a faster computer, but thought i would try it with mine first.
i will be using all pre-made videos, and the only processing will be fades in and out/cross fades, so i hope that the processor won't be out of its mind!
(i did see the wooster group hamlet piece at st. ann's warehouse, it was fab.)
thanks for any advice you can offer!
There is a post in the Troika Tronix forum in the Perfformance section about this today. I will find an answer later today and post it.
But I don't think 8 projectors is possible. You can only add three cards, no? Three dual head cards would give you 6 outputs. And besides, Isadora itself only supports 6 distinct outputs.
But _for sure_ you cannot play more than three full res DV clips at a time on one machine, unless you get a very very fast disk drive. If you want to play 6 clips, they will have to be less than full resolution.
The total number of videos you can play at full frame rates are a rather alchemical mix of the video's resolution and video compression format, the processor speed, the amount of RAM and the speed of the disk drive. The speed of the disk drive is a much bigger factor than most people realize.
Best Wishes,
Mark
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Mark Coniglio / TroikaTronix
Creator of Isadora
(This post was edited by Mark Coniglio on Apr 25, 2007, 4:23 AM)
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