Item-stack error

Comments

• sebastiaan

  January 2017

  Hi Felix,

  The crucial part of the error message is at the bottom, that is, the part that we can't see in your screenshot.

  The best way to post the error message is by simply copy-pasting the full text. You can use ~~~ markers to indicate that something is code when posting on the forum. Like so:

  ~~~
  # Your stacktrace here
  ~~~
  

  Cheers,
  Sebastiaan

  
• Felix1989

  January 2017

  Hi Sebastiaan,
  i see, lets try this...

   File "C:\Program Files (x86)\OpenSesame\lib\site-packages\libqtopensesame\misc\process.py", line 140, in run
      exp.run()
    File "C:\Program Files (x86)\OpenSesame\lib\site-packages\libopensesame\experiment.py", line 413, in run
      self.items.execute(self.var.start)
    File "C:\Program Files (x86)\OpenSesame\lib\site-packages\libopensesame\item_store.py", line 90, in execute
      self.prepare(name)
    File "C:\Program Files (x86)\OpenSesame\lib\site-packages\libopensesame\item_store.py", line 122, in prepare
      self[name].prepare()
    File "C:\Program Files (x86)\OpenSesame\lib\site-packages\libopensesame\sequence.py", line 124, in prepare
      self.experiment.items.prepare(_item)
    File "C:\Program Files (x86)\OpenSesame\lib\site-packages\libopensesame\item_store.py", line 122, in prepare
      self[name].prepare()
    File "C:\Program Files (x86)\OpenSesame\lib\site-packages\libopensesame\sequence.py", line 124, in prepare
      self.experiment.items.prepare(_item)
    File "C:\Program Files (x86)\OpenSesame\lib\site-packages\libopensesame\item_store.py", line 122, in prepare
      self[name].prepare()
    File "C:\Program Files (x86)\OpenSesame\share\opensesame_plugins\media_player_mpy\media_player_mpy.py", line 119, in prepare
      elif not self.player.load_media(path):
    File "C:\Program Files (x86)\OpenSesame\lib\site-packages\mediadecoder\decoder.py", line 162, in load_media
      self.clip = VideoFileClip(mediafile, audio=play_audio)
    File "C:\Program Files (x86)\OpenSesame\lib\site-packages\moviepy\video\io\VideoFileClip.py", line 55, in __init__
      reader = FFMPEG_VideoReader(filename, pix_fmt=pix_fmt)
    File "C:\Program Files (x86)\OpenSesame\lib\site-packages\moviepy\video\io\ffmpeg_reader.py", line 32, in __init__
      infos = ffmpeg_parse_infos(filename, print_infos, check_duration)
    File "C:\Program Files (x86)\OpenSesame\lib\site-packages\moviepy\video\io\ffmpeg_reader.py", line 250, in ffmpeg_parse_infos
      if "No such file or directory" in lines[-1]:
  IndexError: list index out of range
  Dismiss this message
  

  Best wishes
  Felix
• Chichi

  March 2018

  Hi,

  I get exactly the same error and I was wondering if you have already a solution, since the previous post is pretty old. I checked the preferences and the packages. I cannot understand why the experiment is working in one laptop and not in another one, the one that I have to use during the testing session.

  Do you a solution?

  Thanks
  Chi
• sebastiaan

  March 2018

  This looks like a bug in ffmpeg to me. @Daniel Do you recognize this?

  
• Chichi

  March 2018

  Hi Sebastiaan, hi Daniel,

  the problem is still present. Do you have maybe some suggestions? We also tried with different OpenSesame versions and different video files (avi and fls) but the problem persists on that laptop.

  Cheers,
  Chichi
• Daniel

  March 2018

  Hi all,

  Sorry for joining in so late, but this problem indeed appears to originate from within the moviepy module. An update to this module might fix this, but since I haven't updated the media player plugin for a while, I hope a newer moviepy version won't break anything else. In any case, I think it is worth the try.

  According to the instructions from http://osdoc.cogsci.nl/3.2/manual/environment/ you can update the moviepy module by issuing the following command in the OpenSesame debug window:

  import pip
  pip.main(['install', 'moviepy', '--upgrade'])
  

  Could you give this a try and let us know how it went here?