different scan rates/frame rates and avoiding green bars at
the bottom, flickering scan lines, etc.
Note that with some devices, changing these properties can also affect future
invocations (sets new defaults) until system reboot occurs.
</p>
</dd>
<dt>&lsquo;<samp>show_audio_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 audio filter properties
and configurations manually.
</p>
</dd>
<