Issue: Video not playing smoothly and if user issue stop command, same video will start playing back again. State transitioning does not work properly. 

When Rygel gets following message.Types from the GST bus, rygel should not be setting the GST states PLAYING or PAUSED.  GST itself capable of handling the BUFFERING and CLOCK_LOST.  It confuses the Gstreamer and as a result video freezing and video stop does not working properly.  Our Gstreamer team have confirmed that rygel should not be handling following message types in GST point of view.

MessageType.BUFFERING:
MessageType.CLOCK_LOST:

by removing following state changing statements in both cases, now stop command works properly and video is playing back lot smoother than before.

//this.playbin.set_state (State.PAUSED);
//this.playbin.set_state (State.PLAYING);

Please let us know any feedback.

Thanks,
Siva