title: How to set a DEBUG for appsink plugin in gstreamer
body: <p>Does anyone have a clue on how to set gst-debug for a appsrc plugin in my pipeline via <strong>a pipeline application (c file )</strong>? </p>
  
  <p>(Just like how we insert --gst-debug=appsrc:9 in gst-launch-1.0 command line on terminal?)</p>
  
  <p>Thanks ! </p>