solomonB

I am working on a large project which requires the use of multiple projectors outputting various video streams. This is for a performance which needs to be portable and easy to setup. I have a macbook pro which will be used for all the video processing. I have not been able to find information on using multiple video outs from one computer. Will this require multiple computers to achieve?

hardware-multiple-video-outputs-from-one-computer

look at the triple head to go or the double head to go

http://www.matrox.com/graphics/en/cadgis/products/th2go/th2go.php

I use 2 networked macbook pros to drive 2 projectors and my sound...

I found that a tower just was not a real option for me for touring ...

Sent: Friday, December 7, 2007 10:37:12 PM

Subject: [jitter] [Hardware] multiple video outputs from one computer

I am working on a large project which requires the use of multiple

projectors outputting various video streams. This is for a performance

which needs to be portable and easy to setup. I have a macbook pro which

will be used for all the video processing. I have not been able to find

information on using multiple video outs from one computer. Will this

I found that  a tower just was not a real option for me for touring ...

----- Original Message ----
From: Solomon Bothwell 
Sent: Friday, December 7, 2007 10:37:12 PM
Subject: [jitter] [Hardware] multiple video outputs from one computer

I am working on a large project which requires the use of multiple
 projectors outputting various video streams. This is for a performance
 which needs to be portable and easy to setup. I have a macbook pro which
 will be used for all the video processing. I have not been able to find
 information on using multiple video outs from one computer. Will this
 require multiple computers to achieve?


Woah this is exactly what I was looking for. The laptop will be dedicated to video processing and will be recieving the control data via ethernet. Will a single macbook pro 2.16ghz 512mb ram be able to process and output to three projectors without any delay or latency issues?

To get an answer for this you need to supply more info-

the answer to this may wildly vary according to your video playing and processing needs, and networking strategy (broadcasting jitter video, or only control data, etc.). You need to supply more details on what you are planning to output: straight quicktime, processed matrices, opengl (which you may not broadcast through the jitter networking objects but must either read back to matrixland or broadcast only the control data). Also relevant are the pixel dimensions of your output.

Concerning multiple stream solutions, you can sometimes also improvise, such as outputting one stream via the video out and another through firewire (which again limits you to matrix output).

To get an answer for this you need to supply more info-
the answer to this may wildly vary according to your video playing and processing needs, and networking strategy (broadcasting jitter video, or only control data, etc.). You need to supply more details on what you are planning to output: straight quicktime, processed matrices, opengl (which you may not broadcast through the jitter networking objects but must either read back to matrixland or broadcast only the control data). Also relevant are the pixel dimensions of your output.

With a triple head 2 go, you'll have to be careful about pixel fill

rates from your GPU. Relatively expensive shaders like phong shading

can add up quickly on large display dimensions, especially if each

frame has lots of objects that are nearly screen size. This can be

counteracted by rendering to texture smaller than screen size but you

will lose some quality although in most cases a good compromise can be

On Dec 7, 2007 8:10 PM, Solomon Bothwell wrote:

> Woah this is exactly what I was looking for. The laptop will be dedicated to video processing and will be recieving the control data via ethernet. Will a single macbook pro 2.16ghz 512mb ram be able to process and output to three projectors without any delay or latency issues?

With a triple head 2 go, you'll have to be careful about pixel fill
rates from your GPU.  Relatively expensive shaders like phong shading
can add up quickly on large display dimensions, especially if each
frame has lots of objects that are nearly screen size.  This can be
counteracted by rendering to texture smaller than screen size but you
will lose some quality although in most cases a good compromise can be
found.

On Dec 7, 2007 8:10 PM, Solomon Bothwell  wrote:
>
> Woah this is exactly what I was looking for. The laptop will be dedicated to video processing and will be recieving the control data via ethernet. Will a single macbook pro 2.16ghz 512mb ram be able to process and output to three projectors without any delay or latency issues?
>
>


How has the triple head 2 go worked out? I am looking to buy one in case I cannot acquire some extra computers for an install. I just did a quick search online and some MBP users are having problems with the Matrox Drivers and are instead using SwitchResX (

http://vjforums.com/showthread.php?t=21609)?

 Has anyone had some experience with MBP and the Triple Head 2 Go they can share? Or perhaps the Dual Head 2 Go? Did you have to use Analog or Digital?

And is it safe to assume that if I create a window the size of 3360x1050, the frame rate I get on my MBP single display would be the same as the Matrox Output?

How has the triple head 2 go worked out?  I am looking to buy one in case I cannot acquire some extra computers for an install.  I just did a quick search online and some MBP users are having problems with the Matrox Drivers and are instead using SwitchResX (http://vjforums.com/showthread.php?t=21609)?  Has anyone had some experience with MBP and the Triple Head 2 Go they can share?   Or perhaps the Dual Head 2 Go?  Did you have to use Analog or Digital?