I am trying to write a patch for a G4 15" laptop using Max 4.5.7 and 

Jitter 1.5. I want to have 5 cameras running on the same laptop. The 

cameras are porting in through a firewire hub that is powered.

I am trying to write a patch for a G4 15" laptop using Max 4.5.7 and  
Jitter 1.5. I want to have 5 cameras running on the same laptop. The  
cameras are porting in through a firewire hub that is powered.

Ken
ken@kennethfeinstein.com
www.kennethfeinstein.com
646-220-8257

multiple-camera-on-a-laptop

On Jun 14, 2006, at 3:58 PM, Kenneth Feinstein wrote:

> I am trying to write a patch for a G4 15" laptop using Max 4.5.7 

> and Jitter 1.5. I want to have 5 cameras running on the same 

> laptop. The cameras are porting in through a firewire hub that is 

Depending on the camera type and resolution at which you are 

transitting he capture data o he computer, it sounds like you would 

probably saturate the FW bandwidth. I think you should be able to 

deliver 3xIIDC @ 640x480 streams per 400Mb/s FW port (a hub does you 

no good here as they all share the single port's BW). You might 

investigate PCI slots which provide additional FW ports. However 

you'll also have to investigate saturating the PCI bandwidth and deal 

with CPU overhead, perhaps resulting in less than applicable 

framerates. Your application might require using multiple computers.

Here's an Apple Tech note on the subject:

http://developer.apple.com/qa/qa2004/qa1365.html

> I am trying to write a patch for a G4 15" laptop using Max 4.5.7  
> and Jitter 1.5. I want to have 5 cameras running on the same  
> laptop. The cameras are porting in through a firewire hub that is  
> powered.

Depending on the camera type and resolution at which you are  
transitting he capture data o he computer, it sounds like you would  
probably saturate the FW bandwidth. I think you should be able to  
deliver 3xIIDC @ 640x480 streams per 400Mb/s FW port (a hub does you  
no good here as they all share the single port's BW). You might  
investigate PCI slots which provide additional FW ports. However  
you'll also have to investigate saturating the PCI bandwidth and deal  
with CPU overhead, perhaps resulting in less than applicable  
framerates.  Your application might require using multiple computers.

Here's an Apple Tech note on the subject:
http://developer.apple.com/qa/qa2004/qa1365.html

http://unibrain.com/download/pdfs/Fire-i_Board_Cams/camera_b

ptgrey has lots of knowledgebase articles

http://www.ptgrey.com/support/kb/index.asp?a=4&q=22&

see unibrain support
page
  http://unibrain.com/download/pdfs/Fire-i_Board_Cams/camera_b ytes_pkts_3Public.pdf

ptgrey has lots of knowledgebase articles
  http://www.ptgrey.com/support/kb/index.asp?a=4&q=22& ST=bandw idth


i used - with success - 4 FW cameras on a Pb titanium (1 giga)

those were unibrains, daisy chained, without being powered (other 

since i did not encounter any special problems (the rest of the 

jitter patch was pretty simple - just pick at random one of the 4 

images and send this to the 2nd screen for a duration chosen at 

those were unibrains, daisy chained, without being powered (other 
than the FW port)

since i did not encounter any special problems (the rest of the 
jitter patch was pretty simple - just pick at random one of the 4 
images and send this to the 2nd screen for a duration chosen at 
random between x

kasper
-- 
  Kasper T. Toeplitz
noise, composition, bass, computer
http://www.sleazeArt.com

Multiple camera on a laptop