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

<plugin>
  <name>adder</name>
  <description>Adds multiple streams</description>
  <filename>../../gst/adder/.libs/libgstadder.so</filename>
  <basename>libgstadder.so</basename>
  <version>1.15.2.1</version>
  <license>LGPL</license>
  <source>gst-plugins-base</source>
  <package>GStreamer Base Plug-ins git</package>
  <origin>Unknown package origin</origin>
  <elements>
    <element>
      <name>adder</name>
      <longname>Adder</longname>
      <class>Generic/Audio</class>
      <description>Add N audio channels together</description>
      <author>Thomas Vander Stichele &lt;thomas at apestaart dot org&gt;</author>
      <pads>
        <caps>
          <name>sink_%u</name>
          <direction>sink</direction>
          <presence>request</presence>
          <details>audio/x-raw, format=(string){ S32LE, U32LE, S16LE, U16LE, S8, U8, F32LE, F64LE }, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], layout=(string){ interleaved }</details>
        </caps>
        <caps>
          <name>src</name>
          <direction>source</direction>
          <presence>always</presence>
          <details>audio/x-raw, format=(string){ S32LE, U32LE, S16LE, U16LE, S8, U8, F32LE, F64LE }, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], layout=(string){ interleaved }</details>
        </caps>
      </pads>
    </element>
  </elements>
</plugin>