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

<plugin>
  <name>webrtc</name>
  <description>WebRTC plugins</description>
  <filename>../../ext/webrtc/.libs/libgstwebrtc.so</filename>
  <basename>libgstwebrtc.so</basename>
  <version>1.15.2.1</version>
  <license>LGPL</license>
  <source>gst-plugins-bad</source>
  <package>GStreamer Bad Plug-ins git</package>
  <origin>Unknown package origin</origin>
  <elements>
    <element>
      <name>webrtcbin</name>
      <longname>WebRTC Bin</longname>
      <class>Filter/Network/WebRTC</class>
      <description>A bin for webrtc connections</description>
      <author>Matthew Waters &lt;matthew@centricular.com&gt;</author>
      <pads>
        <caps>
          <name>sink_%u</name>
          <direction>sink</direction>
          <presence>request</presence>
          <details>application/x-rtp</details>
        </caps>
        <caps>
          <name>src_%u</name>
          <direction>source</direction>
          <presence>sometimes</presence>
          <details>application/x-rtp</details>
        </caps>
      </pads>
    </element>
  </elements>
</plugin>