Two video inputs?

[Ben Rubinstein]

Can the Rev Video library be used to preview, capture, or otherwise work with 
more than one video source?

On the face of it there's no obvious way.  If you have one video source, 
that's it.  Plug an external iSight into a Mac with an internal iSight, and 
the external camera becomes the default.   revVideoGrabDialog can be used to 
select between sources.  But is there any way to use both at once?

TIA,

- Ben