[PD] Multiple videos on different Screens with gem

B. Bogart bbogart at goto10.org
Thu Nov 8 18:36:50 CET 2007


I'm using a nvidia 8500 card under linux using one single gemwin
spanning both screens. Certainly does not fall back to software rendering.

I would hope the nvidia quatro cards would do the same, but I've never
used one.

If your just playing videos look into ivysync.

Perhaps even Hans managed to get his VLC remote control through PD to
work, which could mean having a fullscreen VLC on each screen (I'm not
sure if vlc is multi-screen aware though.

I would not expect GL to work equally on all 5 screens, I would do lots
of tests before you expect it to work.


Robert Gruendler wrote:
> The hardware setup is the following:
> 2 FireMV 2400 pci express cards. Each card has 4 outputs. (didn't
> choose the hardware setup, only have to work with it...)
> Basically i need to have 2 setups:
> - Play 5 different videos on 5 different screens
> - Play 1 ultra-wide video over 5 screens (4 outputs on first card, 1
> output on second)
> Is there any chance this will work (performance-wise) ?
> I havent really started working on the patch yet, that's why i
> thought i might consult someone
> with more insight/experience with gem.
> -robert
> On Nov 7, 2007 9:10 AM, chris clepper <cgclepper at gmail.com> wrote:
>> What sort of hardware setup?  If you have multiple graphics cards
>> driving the displays then having one instance of Pd/GEM per card is
>> the best way to work.  Spreading one context over multiple cards will
>> fall back to software rendering and be very slow.
>> On Nov 7, 2007 10:53 AM, Robert Gruendler <doobre at gmail.com> wrote:
>>> Hi all,
>>> i'm having a setup with 4 projectors connected to a win xp box and
>>> would need to play 4 different videos at the same time (one on each
>>> screen).
>>> I've already searched the mailing list, and found some information
>>> about a cvs version of gem that supports multiple gemwins.
>>> The  version of gem i'm using is 0.91-cvs (the one coming with the
>>> latest pd-extended), but it seems i can't create multiple windows.
>>> When i try to create a second gemwin, i'm getting "error: GEM: gemwin:
>>> window already made".
>>> Is there a way to accomplish this without opening several instances of pd ?
>>> thanks for your help,
>>> -robert
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