[jitter] multiple Firewire cameras and jit.qt.grab

thanks for the feedback, Jamie. If true, it's disappointing that these cameras can't be used with the IIDC driver. Do you know if this is true of all miniDV cameras? 

It would be helpful if jit.qt.grab had a couple more explanatory error messages. For example, it would be nice if sending "open, vdevice IIDC Firewire Video, input [your DV camera]" to jit.qt.grab returned an error like "selected input device cannot be used with the selected driver: IIDC".  


-----Original Message-----
From: jamie jewett <jewett18 at yahoo.com>

Date: Wed, 19 Dec 2007 15:54:17 
To:jitter at cycling74.com
Subject: Re: [jitter] multiple Firewire cameras and jit.qt.grab


those 2 cameras are DV cameras not IIDC cameras - so you can only use one at a time...

the IIDC driver is not for DV cameras but for ICD cameras - which don't send a DV stream in

so no - you don't have to buy a mixer but you might want to look at some different cameras or a 1394imaging dfg box

I have used the fire-i camera extensively and have been happy with them...
they used to cost around $100... and if you get the 'board' version you can switch which lens you are using - helpful if you need different lenses for different applications...

good luck
jamie

----- Original Message ----
From: Dan Winckler <dan at danwinckler.com>
To: jitter at cycling74.com
Sent: Wednesday, December 19, 2007 10:33:57 AM
Subject: [jitter] multiple Firewire cameras and jit.qt.grab 


Happy Holidays, everybody!

I am trying to open two Firewire cameras (a Canon GL2 and a Panasonic  
DVX100) at the same time with two jit.qt.grab objects.  I am using a  
Kramer 4-port FW hub since the MacBook Pro has only one FW input.

Last night I was unable to open both at once but could open each  
independently.   (I know that you have to use the IIDC FireWire  
driver) for this to work. It went something like this:

* plug in both cameras
* open a [jit.qt.grab], select the IIDC Firewire Video driver, select  
one camera (both showed up in the input list).
* send "open" to the second grab object.  Despite selecting the IIDC  
driver, the other camera would not show up in the input list.  I got  
an error message in the Max window, which, er, I did not save.  (It  
was in the heat of battle just before the show....)  It was one of  
the standard jit.qt.grab errors I've seen before.  :-/

I also tried plugging in and opening the cameras one at a time.  No  
luck.  Also tried opening one of the cameras with the DV driver to  
see if that would let me open the other with IIDC -- no luck.

I won't have access to both cameras again until January.  In the  
meantime, any suggestions to get this working -- besides "get a  
mixer" -- would be much appreciated.  Thanks!

dan


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