I cannot believe I haven't got this in my blog..
How to grab video from your IEEE1394/FireWire interconnectable DV Cam...
Well here it is:
Possibly you will get an error message saying something like "failure reading from raw1394" when you either, try to use Kino to capture, or use dvgrab from the command line, what to do?
you@yourpc:/$ sudo chmod a+rw /dev/raw1394
Then try dvgrab, this is the most likely to work.
type "dvgrab -i" to use in interactive mode, then you can play and stop aso.