[open] media_player_gst not working in fullscreen mode

Comments

• sebastiaan

  September 2015 edited 12:14PM

  Hi Steffen,

  I'll pass this on to @dschreij, who's the developer of the media-player gst plugin.

  Cheers,
  Sebastiaan

  
  
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• Daniel

  September 2015 edited 12:14PM

  Hi Steffen,

  could you tell me what OS you are running on, and which version of OpenSesame? In these cases it always helps if I can reproduce the problems. Can you send the experiment (with movies included in the file pool) to d.schreij (at) vu [dot] nl? I'll have a look and see if I can find what the problem is.

  
• sharti

  September 2015 edited 12:14PM

  Hey thanks for getting back to me!

  I am working on Windows 7 x64 with the latest Version of OpenSesame (2.9.7)
  Alright, I will send you the file.
• sharti

  September 2015 edited 12:14PM

  Ah, important to note is that I modified the Media_player_gst.py file: I replaced the original exec statement for individual python code in all handlers to:

  exec(self.custom_event_code, self.main_player.experiment.python_workspace._globals, locals())
  
• Daniel

  September 2015 edited 12:14PM

  I had a look at your experiment and it worked fine on my PC, which runs Windows 10 though. The movie played very smoothly with all backends, in both windowed and fullscreen mode, so I could not reproduce the flickering. Did you try running the experiment on another computer? What video card does the computer with problematic video rendering have?

  Regarding the change to the media_player_gst module, this should not be necessary if all you are trying to do is have access to global variables. The self.experiment or exp object is accessible in the event code section, so if you put all the variables you need in the exp object, you can access them through this object. Your preparation code then could be as follows:

  from multiprocessing.pool import ThreadPool
  from openexp.synth import synth
  from openexp.keyboard import keyboard
  
  #Initialise components
  exp.keybrd = keyboard(exp, keylist=['SPACE'], timeout=2000)
  exp.sound = synth(exp, length = 300)
  
  exp.sample_tms = [100,500]
  samples = len(exp.sample_tms)
  
  exp.prev_frame = 0
  
  #Initialise Threadpool
  exp.pool = ThreadPool(processes = 1)
  
  #Auditory response task for threads to run
  def play_sample(experiment, kbrd, snd):
      kbrd.flush()
      t1 = exp.time()
      snd.play()
      key, t2 = kbrd.get_key()
      rt = t2-t1
      if key == None:
          exp.set('rt_learn', 'timeout' )
      else:
          exp.set('rt_learn', t2-t1)
  
      print rt
      return
  
  exp.play_sample = play_sample
  

  The code in the media_player_gst event loop should then become

  if frame in exp.sample_tms and frame != exp.prev_frame:
      #Update previous frame
      exp.prev_frame = frame
  
      #Set frame and timestamp
      exp.set('frame_timestamp', exp.time())
      exp.set('frame', frame)
  
      #Play audio and collect response time in new thread
      exp.thread_result = exp.pool.apply_async(exp.play_sample, (exp, exp.keybrd, exp.sound))
  
      #Log all variables
      #log_vars()
  

  I commented log_vars() because I didn't understand exactly what you were trying to do there. It's best to just use the logger item for logging variables

  
• Daniel

  September 2015 edited 12:14PM

  Another thing that comes to my mind is that it might be a buffering setting of OpenGL. If you go to your graphic card properties page, see if you can play around with 'tripple buffering' settings and such of OpenGL