On 14 Jan 2008, at 02:26, Adrian Ward wrote:
On 12 Jan 2008, at 19:24, David Stolarsky wrote:
I can't tell what exactly the deal here is...I'm considering
purchasing a Mac Pro with 4 dual out graphics cards for a 2 X 4
monitor display wall. Can I drive all the screens with a single
composition running inside quartz composer? QC Visualizer? Would
I need to use QCViews or QCRenderers? I read in the archives
about Render in Image and Image with Movie problems with multiple
graphics cards, but maybe that was just Tiger.
You could use Quartz Composer Visualizer which does a nice job of
rendering each screen in a different thread and synchronising the
different screens. This however causes problems if you use a Movie
Loader since you can't handle a QuickTime movie in a different
thread than it was initialised in. I had filed this as a bug
(rdar://5673045) but got a response back recently which explained
the solution clearly.
I suggest anyone that wants to do this also take a look at
Troikatronix Isadora.
www.troikatronix.com
I did a test last year for a theatre production playing back quartz
compositions split across four outputs on two graphics cards. The
Isadora renderer seems to already be capable of running multi GPU's
just drop them in and they play back ok.
Isadora also supports quartz compositions as effects chains with full
parameter support and has a lot of very sophisticated support for
DMX, serial inputs, multi channel audio etc. I'd suggest any doing
theatre or multi screen display work with
QC would probably save a lot of time if they consider using an
Isadora + Qtz combo rather than rolling it all yourself.
Roger
CoreMelt
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Quartzcomposer-dev mailing list ([email protected])
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/quartzcomposer-dev/archive%40mail-archive.com
This email sent to [EMAIL PROTECTED]
