glebone and Webcam Hp 3200 HD

Hi everybody,

I am new with beaglebone and I am trying to connect a webcam to do image processing.
I do all the steps of the Derek malloy’s website(

there is not something wrong in the process.

But when I finished all the process I type:
root@beaglebone:~# ffmpeg -f video4linux2 -i /dev/video0 out.avi

and appears:

WARNING: gnome-keyring:: couldn’t connect to: /run/user/daniel/keyring-37jbja/pkcs11: No such file or directory
ffmpeg version 0.8.16-6:0.8.16-1, Copyright © 2000-2014 the Libav developers
built on Sep 17 2014 13:57:48 with gcc 4.6.3
The ffmpeg program is only provided for script compatibility and will be removed
in a future release. It has been deprecated in the Libav project to allow for
incompatible command line syntax improvements in its replacement called avconv
(see Changelog for details). Please use avconv instead.

.so I can`t access or see the webcam. what can I fixed?? I also try with a genius webcam, but it shows the same message .

I appreciate your support. (what procedure I have to do to see the image of the webcam on a Beaglebone Black?)