public void stopDisplayService(){
    if (mediaProjection != null) {
      mediaProjection.stop();
      mediaProjection = null;
    }
    if (glInterface != null) {
      glInterface.removeMediaCodecSurface();
      glInterface.stop();
      videoEncoder.stop();
    }
  }


public void stopRtspFromFile() {
    if (streaming) {
      streaming = false;
    }
    if (!recordController.isRecording()) {
      if (glInterface != null) {
        glInterface.removeMediaCodecSurface();
        glInterface.stop();
      }
      if (videoEnabled) videoDecoder.stop();
      if (videoEnabled) videoEncoder.stop();
      recordController.resetFormats();
      videoEnabled = false;
    }
  }

public void startDisplayService(){
    videoEncoder.start();
    if (glInterface != null) {
      glInterface.setFps(videoEncoder.getFps());
      glInterface.start();
      glInterface.addMediaCodecSurface(videoEncoder.getInputSurface());
    }
    Surface surface =
            (glInterface != null) ? glInterface.getSurface() : videoEncoder.getInputSurface();
    if (mediaProjection == null) {
      mediaProjection = mediaProjectionManager.getMediaProjection(resultCode, data);
    }
    if (glInterface != null && videoEncoder.getRotation() == 90
            || videoEncoder.getRotation() == 270) {
      mediaProjection.createVirtualDisplay("Stream Display", videoEncoder.getHeight(),
              videoEncoder.getWidth(), dpi, 0, surface, null, null);
    } else {
      mediaProjection.createVirtualDisplay("Stream Display", videoEncoder.getWidth(),
              videoEncoder.getHeight(), dpi, 0, surface, null, null);
    }
  }


//switch from displayService to rtspFromFile  
displayBase!!.stopDisplayService()
rtspFromFile!!.setVideoEncoder(DisplayBase.getVideoEncoder()) 
rtspFromFile!!.setOnlyVideo(true) 
rtspFromFile!!.prepareVideo(path)
rtspFromFile!!.setLoopMode(true)
rtspFromFile!!.startStream(rtsp_server)


//Switch from rtspFromFile to displayService
rtspFromFile!!.stopRtspFromFile()
displayBase!!.prepareVideo()
displayBase!!.startDisplayService()