Security enhanced replacement drivers are being worked on since last
year, but not yet ready for prime time.  It is possible with these
drivers to let scripts assign different device file permissions based on
the type of FireWire device ( -> finer grained device security).  These
drivers also implement filtered physical DMA as mentioned in a previous
comment ( -> improved host security).  Development status of these
drivers is posted at wiki.linux1394.org.

> Capturing DV video over the desktop should be straightforward,

It actually is, except if ancient userspace software is used.

-- 
use /dev/video1394, not /dev/raw1394
https://bugs.launchpad.net/bugs/6290
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