n -video_device_index 2 -i &quot;:1&quot; out.avi
</pre></div>

</li><li>
Record video from the system default video device using the pixel format bgr0 and do not record any audio into out.avi:
<div class="example">
<pre class="example">$ ffmpeg -f avfoundation -pixel_format bgr0 -i &quot;default:none&quot; out.avi
</pre></div>

</li></ul>

<a name="bktr"></a>
<h2 class="section"><a href="ffmpeg-devices.html#toc-bktr">3.4 bktr</a></h2>

<p>BSD video input device.
</p>
<a name="Options-23"></a>
<h3 class="su