gstreamer/docs/plugins/inspect/plugin-speed.xml

<plugin>
  <name>speed</name>
  <description>Set speed/pitch on audio/raw streams (resampler)</description>
  <filename>../../gst/speed/.libs/libgstspeed.so</filename>
  <basename>libgstspeed.so</basename>
  <version>1.7.90</version>
  <license>LGPL</license>
  <source>gst-plugins-bad</source>
  <package>GStreamer Bad Plug-ins source release</package>
  <origin>Unknown package origin</origin>
  <elements>
    <element>
      <name>speed</name>
      <longname>Speed</longname>
      <class>Filter/Effect/Audio</class>
      <description>Set speed/pitch on audio/raw streams (resampler)</description>
      <author>Andy Wingo &lt;apwingo@eos.ncsu.edu&gt;, Tim-Philipp Müller &lt;tim@centricular.net&gt;</author>
      <pads>
        <caps>
          <name>sink</name>
          <direction>sink</direction>
          <presence>always</presence>
          <details>audio/x-raw, format=(string){ F32LE, S16LE }, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ]</details>
        </caps>
        <caps>
          <name>src</name>
          <direction>source</direction>
          <presence>always</presence>
          <details>audio/x-raw, format=(string){ F32LE, S16LE }, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ]</details>
        </caps>
      </pads>
    </element>
  </elements>
</plugin>