title: How to get sink elements from a pipeline?
body: <p>I have a pipeline, which is created by using the below function</p>
  
  <pre><code>gst_parse_launch(char * string);
  </code></pre>
  
  <p>Now I would like to overlay the video, in my WID. For that I need to get the sink element.</p>
  
  <p>How to get the Sink element from above pipeline?</p>