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

<plugin>
  <name>audiomixmatrix</name>
  <description>Audio matrix mix</description>
  <filename>../../gst/audiomixmatrix/.libs/libgstaudiomixmatrix.so</filename>
  <basename>libgstaudiomixmatrix.so</basename>
  <version>1.15.1</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>audiomixmatrix</name>
      <longname>Matrix audio mix</longname>
      <class>Filter/Audio</class>
      <description>Mixes a number of input channels into a number of output channels according to a transformation matrix</description>
      <author>Vivia Nikolaidou &lt;vivia@toolsonair.com&gt;</author>
      <pads>
        <caps>
          <name>sink</name>
          <direction>sink</direction>
          <presence>always</presence>
          <details>audio/x-raw, channels=(int)[ 1, 2147483647 ], layout=(string)interleaved, format=(string){ F32LE, F64LE, S16LE, S32LE }</details>
        </caps>
        <caps>
          <name>src</name>
          <direction>source</direction>
          <presence>always</presence>
          <details>audio/x-raw, channels=(int)[ 1, 2147483647 ], layout=(string)interleaved, format=(string){ F32LE, F64LE, S16LE, S32LE }</details>
        </caps>
      </pads>
    </element>
  </elements>
</plugin>