r=<var>muxer_name</var></samp></dt>
<dd><p>Print detailed information about the muxer named <var>muxer_name</var>. Use the
<samp>-formats</samp> option to get a list of all muxers and demuxers.
</p>
</dd>
<dt><samp>filter=<var>filter_name</var></samp></dt>
<dd><p>Print detailed information about the filter name <var>filter_name</var>. Use the
<samp>-filters</samp> option to get a list of all filters.
</p></dd>
</dl>

</dd>
<dt><samp>-version</samp></dt>
<dd><p>Show version.
</p>
</dd>
<dt><samp>-formats</sa