Just a little note, how to grab dv avis on Linux.
dvgrab -format dv2 -opendml -size 0 -showstatus
If your System is not configured properly you perhaps need to be either root or to make it accessible for your current user (until next reboot) by using chown:
sudo chown <user> /dev/raw1394
Check if firewire modules are loaded
If nothing is listed, try to load the kernel module
If you need to capture a video by using the camera's dv digitizer but