default) until system reboot occurs.
</p>
</dd>
<dt>&lsquo;<samp>show_video_device_dialog</samp>&rsquo;</dt>
<dd><p>If set to &lsquo;<samp>true</samp>&rsquo;, before capture starts, popup a display dialog
to the end user, allowing them to change video filter properties
and configurations manually.
Note that for crossbar devices, adjusting values in this dialog
may be needed at times to toggle between PAL (25 fps) and NTSC (29.97)
input frame rates, sizes, interlacing, etc.  Changing these values can
enable 