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

<plugin>
  <name>cairo</name>
  <description>Cairo-based elements</description>
  <filename>../../ext/cairo/.libs/libgstcairo.so</filename>
  <basename>libgstcairo.so</basename>
  <version>1.2.0</version>
  <license>LGPL</license>
  <source>gst-plugins-good</source>
  <package>GStreamer Good Plug-ins source release</package>
  <origin>Unknown package origin</origin>
  <elements>
    <element>
      <name>cairooverlay</name>
      <longname>Cairo overlay</longname>
      <class>Filter/Editor/Video</class>
      <description>Render overlay on a video stream using Cairo</description>
      <author>Jon Nordby &lt;jononor@gmail.com&gt;</author>
      <pads>
        <caps>
          <name>sink</name>
          <direction>sink</direction>
          <presence>always</presence>
          <details>video/x-raw, format=(string){ BGRx, BGRA }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]</details>
        </caps>
        <caps>
          <name>src</name>
          <direction>source</direction>
          <presence>always</presence>
          <details>video/x-raw, format=(string){ BGRx, BGRA }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]</details>
        </caps>
      </pads>
    </element>
  </elements>
</plugin>