code: private void sendClearPing() {
          Ping eof = new Ping();
          eof.setEventType(Ping.STREAM_PLAYBUFFER_CLEAR);
          eof.setValue2(streamId);
          // eos 
          RTMPMessage eofMsg = RTMPMessage.build(eof);
          doPushMessage(eofMsg);
      }
docs: Send clear ping. Lets client know that stream has no more data to send.