From: Dan Dennedy <dan@de...> - 2003-09-04 02:57:13
On Wed, 2003-09-03 at 17:20, Chris Rankin wrote:
> The vloopback device version 0.90 is broken as supplied and will probably crash
> your kernel with the message:
FYI all, this is in relation to the dc1394_vloopback utility that comes
with libdc1394 lest you think he posted to the wrong mailing list!
> Kernel panic: videodev: bad unregister
> when you unload it. I strongly recommend applying the vloopback patch that is
> shipped with effectv:
The comment header of dc1394_vloopback.c mentions this, but perhaps it
does need to be stressed a little more. Not to mention this utility
really needs more work to be useful with many V4L apps. I find myself
having to hack on it for every V4L app I use it with. It seems to make
it more generic enough will require a lot of image conversion and
scaling code to please the limitations of many V4L apps. Needless to
say, it does work as is with effectv.
> I would also suggest adding this information to the video1394 section of the
> linux1394 homepage.
I will consider it once I think dc1394_vloopback is more usable. As it
is, I do not want to draw too much attention to it.
--- Dan Dennedy <dan@...> wrote:
> FYI all, this is in relation to the dc1394_vloopback
> utility that comes
> with libdc1394 lest you think he posted to the wrong
> mailing list!
And there was me thinking that it was in relation to
the description of the video1394 module:
"video1394 is not a Video4Linux driver. There are no
Video4Linux drivers for Digital Camera video or DV on
ieee1394. Instead, one must use a user-space program
in conjunction with the vloopback Video4Linux driver."
Live and learn ... ;-),
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