 Linux
systems tend to automatically create such nodes when the device
(e.g. an USB webcam) is plugged into the system, and has a name of the
kind &lsquo;<tt>/dev/video<var>N</var></tt>&rsquo;, where <var>N</var> is a number associated to
the device.
</p>
<p>Video4Linux2 devices usually support a limited set of
<var>width</var>x<var>height</var> sizes and frame rates. You can check which are
supported using <code>-list_formats all</code> for Video4Linux2 devices.
Some devices, like TV cards, support one or 