;<samp>embedded</samp>&rsquo;,
&lsquo;<samp>aes_ebu</samp>&rsquo;, &lsquo;<samp>analog</samp>&rsquo;, &lsquo;<samp>analog_xlr</samp>&rsquo;, &lsquo;<samp>analog_rca</samp>&rsquo; or
&lsquo;<samp>microphone</samp>&rsquo;. Defaults to &lsquo;<samp>unset</samp>&rsquo;.
</p>
</dd>
<dt>&lsquo;<samp>video_pts</samp>&rsquo;</dt>
<dd><p>Sets the video packet timestamp source. Must be &lsquo;<samp>video</samp>&rsquo;, &lsquo;<samp>audio</samp>&rsquo;,
&lsquo;<samp>reference</samp>&rsquo;, &lsquo;<samp>wallclock</sam