l accepts the following options:
</p>
<dl compact="compact">
<dt>&lsquo;<samp>blocksize</samp>&rsquo;</dt>
<dd><p>Set I/O operation maximum block size, in bytes. Default value is
<code>INT_MAX</code>, which results in not limiting the requested block size.
Setting this value reasonably low improves user termination request reaction
time, which is valuable if data transmission is slow.
</p></dd>
</dl>

<p>Note that some formats (typically MOV), require the output protocol to
be seekable, so they will fail wi