>Possible values of <var>arg</var> are:
</p><dl compact="compact">
<dt><samp>long</samp></dt>
<dd><p>Print advanced tool options in addition to the basic tool options.
</p>
</dd>
<dt><samp>full</samp></dt>
<dd><p>Print complete list of options, including shared and private options
for encoders, decoders, demuxers, muxers, filters, etc.
</p>
</dd>
<dt><samp>decoder=<var>decoder_name</var></samp></dt>
<dd><p>Print detailed information about the decoder named <var>decoder_name</var>. Use the
<samp>-decoders</s