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

<plugin>
  <name>sndfile</name>
  <description>use libsndfile to read and write various audio formats</description>
  <filename>../../ext/sndfile/.libs/libgstsndfile.so</filename>
  <basename>libgstsndfile.so</basename>
  <version>1.9.90</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>sfdec</name>
      <longname>Sndfile decoder</longname>
      <class>Decoder/Audio</class>
      <description>Read audio streams using libsndfile</description>
      <author>Stefan Sauer &lt;ensonic@user.sf.net&gt;</author>
      <pads>
        <caps>
          <name>sink</name>
          <direction>sink</direction>
          <presence>always</presence>
          <details>audio/x-ircam; audio/x-nist; audio/x-paris; audio/x-rf64; audio/x-sds; audio/x-svx; audio/x-voc; audio/x-w64; audio/x-xi</details>
        </caps>
        <caps>
          <name>src</name>
          <direction>source</direction>
          <presence>always</presence>
          <details>audio/x-raw, format=(string){ F32LE, S32LE, S16LE }, layout=(string)interleaved, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ]</details>
        </caps>
      </pads>
    </element>
  </elements>
</plugin>