[mythtv-users] Simple video tests are failing -- what other tests are helpful?

[Mark Matula]

On Wed, 16 Mar 2005, Justin Gombos wrote:

> The following attempts at a simple device dump fail:
>
>   sh-3.00$ cat /dev/video0 > simpleTest
>   cat: /dev/video0: Invalid argument
>
>   sh-3.00$ dd if=/dev/video0 of=simpleTest
>   dd: reading `/dev/video0': Invalid argument
>   0+0 records in
>   0+0 records out
>   0 bytes transferred in 0.002232 seconds (0 bytes/sec)

It doesn't sound like your /dev/video* devices are set up.  You can check:
ls -l /dev/video0

Mine looks like:

mythos:~# ls -l /dev/video0
crw-rw----  1 root video 81, 0 Mar 13 15:38 /dev/video0

After a quick search, I couldn't find the corresponding bit of the official
docs, but thsi is from my personal install notes:

----
Run 'source /usr/src/linux-2.4.22/Documentation/video4linux/bttv/MAKEDEV'
or similar to get the /dev/video* devices set up.  The
ivtv install supposedly takes care of this, but no dice for me.
----

And then there's this thread I found in Gossamer:
http://gossamer-threads.com/lists/mythtv/users/22231

You may have to adjust some of the details to your specific setup.

Good luck.
-- 
Mark Matula
Mikey, you will be missed:
http://eblo.ratula.net/mikey.html