2 -f 4000

# List the current JACK clients.
$ jack_lsp -c
system:capture_1
system:capture_2
system:playback_1
system:playback_2
ffmpeg:input_1
metro:120_bpm

# Connect metro to the ffmpeg writable client.
$ jack_connect metro:120_bpm ffmpeg:input_1
</pre></div>

<p>For more information read:
<a href="http://jackaudio.org/">http://jackaudio.org/</a>
</p>
<a name="Options-4"></a>
<h3 class="subsection"><a href="ffmpeg-devices.html#toc-Options-4">3.12.1 Options</a></h3>

<dl compact="compact">
<dt>&lsquo;<samp