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

<plugin>
  <name>mad</name>
  <description>mp3 decoding based on the mad library</description>
  <filename>../../ext/mad/.libs/libgstmad.so</filename>
  <basename>libgstmad.so</basename>
  <version>1.9.1</version>
  <license>GPL</license>
  <source>gst-plugins-ugly</source>
  <package>GStreamer Ugly Plug-ins source release</package>
  <origin>Unknown package origin</origin>
  <elements>
    <element>
      <name>mad</name>
      <longname>mad mp3 decoder</longname>
      <class>Codec/Decoder/Audio</class>
      <description>Uses mad code to decode mp3 streams</description>
      <author>Wim Taymans &lt;wim.taymans@gmail.com&gt;</author>
      <pads>
        <caps>
          <name>sink</name>
          <direction>sink</direction>
          <presence>always</presence>
          <details>audio/mpeg, mpegversion=(int)1, layer=(int)[ 1, 3 ], rate=(int){ 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000 }, channels=(int)[ 1, 2 ]</details>
        </caps>
        <caps>
          <name>src</name>
          <direction>source</direction>
          <presence>always</presence>
          <details>audio/x-raw, format=(string)S32LE, layout=(string)interleaved, rate=(int){ 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000 }, channels=(int)[ 1, 2 ]</details>
        </caps>
      </pads>
    </element>
  </elements>
</plugin>