How many unibrain firewire cams can be daisychained and still have a decent fps in jitter?

for a small opera play the idea is to use about ten of them .

how-many-unibrain-firewire-cams-can-be-daisychained

the guys from unibrain told me to get this card 

http://www.unibrain.com/Products/p1394/fb800e_dual.htm.

with four firewire ports it could connect up to 16 fire-i cams .

the guys from unibrain told me to get this card http://www.unibrain.com/Products/p1394/fb800e_dual.htm.
with four firewire ports it could connect up to 16 fire-i cams .


Daisy chaining those cams is asking for trouble-- don't do it. In my experience you'll need a separate port for each camera.

edit: just to clarify i was using a mac-- maybe things are different on a pc.

Also, theoretically you cant daisy chain more than 2 cams due to the bandwidth of the fw 400 spec.

Daisy chaining those cams is asking for trouble-- don't do it. In my experience you'll need a separate port for each camera.
T

edit: just to clarify i was using a mac-- maybe things are different on a pc.
Also, theoretically you cant daisy chain more than 2 cams due to the bandwidth of the fw 400 spec.


could work, ptgrey have a whitepaper on FW bandwidth considerations

could work, ptgrey  have a whitepaper on FW  bandwidth considerations


http://www.unibrain.com/download/pdfs/Fire-i_Board_Cams/camera_bytes_pkts_3Public.pdf

unibrain says one could daisychain 4 cams on one firewire line...

got this chart http://www.unibrain.com/download/pdfs/Fire-i_Board_Cams/camera_bytes_pkts_3Public.pdf
(dont realy understand what it says)

unibrain says one could daisychain 4 cams on one firewire line...


Basically it says the more cameras you have on a single buss then the smaller the resolution and the lower the frame rate for each camera will have to be. Also if you want to process 16 different video signals in max then your overall frame rate will be potentially very slow, to the point of impracticality. the only way you're going to know for sure is to get some cameras and try them out...

Article 22 - Maximum number of IEEE-1394 cameras on a single 1394 bus.

http://www.ptgrey.com/support/kb/printable.asp?q=22

they also provide an excel calculator for this

note: AFAIK ptgrey cameras are not compatible with jitter

Article 22 - Maximum number of IEEE-1394 cameras on a single 1394 bus.
http://www.ptgrey.com/support/kb/printable.asp?q=22

they also provide an excel calculator for this
note: AFAIK ptgrey cameras are not compatible with jitter


how many unibrain firewire cams can be daisychained..