.
</p>
<p>Fill data in a background thread, to decouple I/O operation from demux thread.
</p>
<div class="example">
<pre class="example">async:<var>URL</var>
async:http://host/resource
async:cache:http://host/resource
</pre></div>

<a name="bluray"></a>
<h2 class="section"><a href="ffmpeg-protocols.html#toc-bluray">3.2 bluray</a></h2>

<p>Read BluRay playlist.
</p>
<p>The accepted options are:
</p><dl compact="compact">
<dt>&lsquo;<samp>angle</samp>&rsquo;</dt>
<dd><p>BluRay angle
</p>
</dd>
<dt>&lsquo;<sam