[FFmpeg-user] Capture H.264 stream from Logitech C930e (C930) webcam

[Neik]

I am trying to capture the camera-encoded H.264 video stream from a 
Logitech C930e webcam.

It seems that there is support for this in the UVC driver and I 
understand that guvcview supports this camera:

http://sourceforge.net/p/linux-uvc/mailman/message/33405777/

But, I am operating in a command line environment. I need to capture the 
H.264 stream from the camera, write it to a file, and possibly 
retransmit it. I would like to use ffmpeg and ffserver. Ideally I'd like 
this to work on a Raspberry Pi, but am happy to use whatever hardware 
and OS makes this work.

How can I do this using ffmpeg?