What is your configuration (OS, Pd version, Gem version) ?

Ubuntu 14.10 amd64, Pd 0.45.5, and Gem Ver is latest(I guess).

Can you open the stream with VLC ?

Still no luck

If yes, try with [pix_video] and vlc backend :

[driver vlc(
|
[pix_video]

I have no driver for vlc. How to install that in linux?

[pix_video]: backend #0='v4l2' : v4l2 analog

[pix_video]: backend #1='v4l' : v4l analog

[pix_video]: backend #2='dv4l' : dv4l dv

[pix_video]: backend #3='dc1394' : dc1394 iidc

[pix_video]: could not find a backend for driver 'vlc'