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

<plugin>
  <name>teletext</name>
  <description>Teletext plugin</description>
  <filename>../../ext/teletextdec/.libs/libgstteletext.so</filename>
  <basename>libgstteletext.so</basename>
  <version>1.13.1.1</version>
  <license>LGPL</license>
  <source>gst-plugins-bad</source>
  <package>GStreamer Bad Plug-ins git</package>
  <origin>Unknown package origin</origin>
  <elements>
    <element>
      <name>teletextdec</name>
      <longname>Teletext decoder</longname>
      <class>Decoder</class>
      <description>Decode a raw VBI stream containing teletext information to RGBA and text</description>
      <author>Sebastian Pölsterl &lt;sebp@k-d-w.org&gt;, Andoni Morales Alastruey &lt;ylatuya@gmail.com&gt;</author>
      <pads>
        <caps>
          <name>sink</name>
          <direction>sink</direction>
          <presence>always</presence>
          <details>application/x-teletext</details>
        </caps>
        <caps>
          <name>src</name>
          <direction>source</direction>
          <presence>always</presence>
          <details>video/x-raw, format=(string)RGBA, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]; text/x-raw, format=(string){ utf-8, pango-markup }</details>
        </caps>
      </pads>
    </element>
  </elements>
</plugin>