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

<plugin>
  <name>encoding</name>
  <description>various encoding-related elements</description>
  <filename>../../gst/encoding/.libs/libgstencoding.so</filename>
  <basename>libgstencoding.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>encodebin</name>
      <longname>Encoder Bin</longname>
      <class>Generic/Bin/Encoder</class>
      <description>Convenience encoding/muxing element</description>
      <author>Edward Hervey &lt;edward.hervey@collabora.co.uk&gt;</author>
      <pads>
        <caps>
          <name>audio_%u</name>
          <direction>sink</direction>
          <presence>request</presence>
          <details>ANY</details>
        </caps>
        <caps>
          <name>private_%u</name>
          <direction>sink</direction>
          <presence>request</presence>
          <details>ANY</details>
        </caps>
        <caps>
          <name>video_%u</name>
          <direction>sink</direction>
          <presence>request</presence>
          <details>ANY</details>
        </caps>
        <caps>
          <name>src</name>
          <direction>source</direction>
          <presence>always</presence>
          <details>ANY</details>
        </caps>
      </pads>
    </element>
  </elements>
</plugin>