astraphl

What is needed to have two (or more) firewire cameras recognized in a single patch.. ? I have tried a firewire hub which didn't work. I've read other forums which said that osX mac only sees one DV source at a time. However it seems some had sucess with was it.. installing an additional video card? 

but would one be able to run two or more jit.grab objects in one patch? then process and output.. such as motion tracking

mixed with a video out? any clear direction would be appreciated..

What is needed to have two (or more) firewire cameras recognized in a single patch.. ? I have tried a firewire hub which didn't work. I've read other forums which said that osX mac only sees one DV source at a time. However it seems some had sucess with was it.. installing an additional video card? 
but would one be able to run two or more jit.grab objects in one patch? then process and output.. such as motion tracking
mixed with a video out? any clear direction would be appreciated..


multiple-camera-set-up

yes, it will only see 1 DV camera at a time on a firewire bus. You could try adding additional pci firewire cards if you are on a desktop. this will give more firewire busses and therefore more cameras, as I understand it. Never tried it myself.

You could also go analog (cheeper cables and lower latency!) and use a digitizer from 1394imaging.com or use a Miglia alchemyTV card 

http://www.miglia.com/products/video/alchemytvdvr/index.html

yes, it will only see 1 DV camera at a time on a firewire bus.  You could try adding additional pci firewire cards if you are on a desktop.  this will give more firewire busses and therefore more cameras, as I understand it.  Never tried it myself.
You could also go analog (cheeper cables and lower latency!) and use a digitizer from 1394imaging.com or use a Miglia alchemyTV card  http://www.miglia.com/products/video/alchemytvdvr/index.html

that recipe does me no good at all since I don't drink.. but enjoy yourself..

as for the cameras..a portable situtation would seem to require the analogue direction.It would be nice to be able to work with multiple web (usb?) cams on a powerbook with jitter. Perhaps I am missing the obvious but is that impossible? Is it the single quicktime stream issue- and is there a way around it?

i am not on a mac, but look here for hacks.

http://www.vrhotwires.com/InexpensivePanoramicVideo.html

i am not on a mac, but look here for hacks.
http://www.vrhotwires.com/InexpensivePanoramicVideo.html


thanks ..very helpful ..through it found Ben Birds Sec software that works with mac. but not sure if jitter will access it.guess I'll try.

thanks ..very helpful ..through it found Ben Birds Sec software that works with mac. but not sure if jitter will access it.guess I'll try.
A


i used to use 4 FW cameras on a pbook, mac, osX (it was one or 2 

years ago, so it most certainly was panther)

basically there were no magic (!!) involved, just 4 Fire-i cameras 

daisy chained - the attached patch says it all - here the idea was to 

show one of the 4 possible images on the second screen, you can throw 

this is only jitter - at some point I used 3 cams with soft vns - works as well

the only "trick" (which is more recent than the patch) is that now 

(since when???) you should NOT name your cameras not use special 

names for them - it once was possible (so i could "speak" to fire1, 

fire2 etc, now they are all the same. Not sure if they "placement" is 

random, or depending where they are in the chain... in any case not a 

#P window setfont "Fixedwidth Serif" 10.;

#P newex 834 441 122 1441802 jit.qt.grab 320 240;

#P user jit.pwindow 833 502 162 122 0 1 0 0 1 0;

#P message 223 283 68 1441802 patch $1 3;

#P message 154 283 68 1441802 patch $1 2;

#P number 127 260 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;

#P number 90 260 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;

#P number 53 260 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;

#P number 16 260 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;

#P number 16 193 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;

#P newobj 16 171 70 196617 counter 0 1 4;

#P newex 16 238 158 196617 route 1 2 3 4;

#P number 115 193 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;

i used to use 4 FW cameras on  a pbook, mac, osX (it was one or 2 
years ago, so it most certainly was panther)

basically there were no magic (!!) involved, just 4 Fire-i cameras 
daisy chained - the attached patch says it all - here the idea was to 
show one of the 4 possible images on the second screen, you can throw 
away that part

the only "trick" (which is more recent than the patch) is that now 
(since when???) you should NOT name your cameras not use special 
names for them - it once was possible (so i could "speak" to fire1, 
fire2 etc, now they are all the same. Not sure if they "placement" is 
random, or depending where they are in the chain... in any case not a 
problem

#P window setfont "Sans Serif" 9.;
#P window linecount 1;
#P message 834 416 27 196617 open;
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#P window setfont "Fixedwidth Serif" 10.;
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#P newex 834 441 122 1441802 jit.qt.grab 320 240;
#B color 5;
#P user jit.pwindow 833 502 162 122 0 1 0 0 1 0;
#P window setfont "Sans Serif" 9.;
#P comment 843 488 133 196617 webcam4;
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#P message 688 385 51 1441802 input 2;
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#P window setfont "Fixedwidth Serif" 10.;
#P newex 27 318 173 1441802 jit.window snow 5 41 645 521;
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#P message 198 122 14 196617 0;
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#P window setfont "Sans Serif" 12.;
#P comment 280 57 106 196620 !!!!!!!WARNING!!!!!!!!;
#P window setfont "Sans Serif" 9.;
#P window linecount 4;
#P comment 246 86 179 196617 in "extended desktop" mode first place 
the "snow" window (which is in the left corner , top , of this 
screen) on the screen $2. then start;
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-- 
  Kasper T. Toeplitz
noise, composition, bass, computer
http://www.sleazeArt.com

yes this may work with icameras but not with multiple dv cameras .. it seems the jit.qt grab only reads one dv input even when more than one camera is attached on seperate FW inputs or a hub-

so I guess its back to the drawing board - I wanted to use what I had not buy more stuff .

yes this may work with icameras but not with multiple dv cameras .. it seems the jit.qt grab only reads one dv input even when more than one camera is attached on seperate FW inputs or a hub-
so I guess its back to the drawing board - I wanted to use what I had not buy more stuff .


multiple camera set up