[Kdenlive-devel] testing pgrab

[Jason Wood]

> -----Original Message-----
> From: Reinhard Amersberger [mailto:protux at web.de]
> Sent: 17 September 2003 10:31
> To: kdenlive-devel at lists.sourceforge.net
> Subject: [Kdenlive-devel] testing pgrab
> 
> 
> kdenlive-devel at lists.sourceforge.net schrieb am 15.09.03 13:45:40:
> > BTW, did I mention that pgrab is in the CVS HEAD? You can 
> use it to capture DV 
> > from your DV-Cam if it's supported by avc1395.
> > 
> 
> 
> Ok, I've tested it, but had to run pgrab as root, otherwise I 
> get this error:
> 
> ....
> ....
> avccontroller.cc:75 INFO: AVCController::AVCController()
> avccontroller.cc:84 WARNING: couldn't get raw1394 handle
> avstream.cc:63 INFO:  _deliveredFrames=0
> caught std exception: raw1394 system error
> [booker at linux piave]$
> 
> But maybe this is a general problem on my machine, because I 
> had to run kino also as root to be able to grab using the 
> IEEE1394 interface.

It sounds like your normal user does not have read/write access to the
relevant ieee1394 devices. I cannot remember which devices they are, but I
believe /dev/raw1394 or similar is one of them. There are others for
camcorder control and recording, I believe.

There are potential security issues with making the firewire bus
read/writable by a normal user - any ieee1394 device can be accessed via the
bus, so if you had a firewire harddrive for example, a normal user could
completely trash it...

Personally, I don't care about multi-user secutiry issues on my laptop
though, I'm more concerned with the security issues of people walking off
with it ;-)

Cheers,
Jason