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Cannot launch a movie under expyriment

I want to display an .mp4 movie during the presentation of my stimuli but I am unable to do so using Expyriment. I believe this is because the module has been deprecated. I am using expyriment 0.0.7. and pygame 1.9.3.

Could you help me with this?
Thank you very much in advance.
Ana Luísa Pinho

P.S. I am writing below the full log of the error message for sake of clarity.

In [1]: run
Expyriment 0.7.0 (Revision 55a4e7e; Python 2.7.12)
File: (7f2624)
ALSA lib conf.c:3009:(snd_config_update_r) Cannot access file /etc/alsa/alsa.conf
ALSA lib seq.c:935:(snd_seq_open_noupdate) Unknown SEQ default
Warning: OpenGL does not support window mode. OpenGL will be deactivated!
Standard output and error logging is switched off under IPython.
Warning: Mixer is still initialized, cannot play audio! Call expyriment.control.stop_audiosystem() before preloading the video.
/usr/lib/python2.7/dist-packages/expyriment/stimuli/ RuntimeWarning: use movie: No module named movie
(ImportError: No module named movie)

self._file =,

NotImplementedError Traceback (most recent call last)
/volatile/mygit_repos/ibc_ghub/cognitive_protocols/Movie_protocol/ in ()
154 t_start = t0.time
155 # Present stimulus for one second
--> 156 stimulus.present()
157 exp.clock.wait(1000)
158 # Calculate duration of condition

/usr/lib/python2.7/dist-packages/expyriment/stimuli/_video.pyc in present(self)
250 """
--> 252
253 while not self._file.get_frame() > self._frame:
254 pass

/usr/lib/python2.7/dist-packages/expyriment/stimuli/_video.pyc in play(self)
199 if not self._is_preloaded:
--> 200 self.preload()
201 if self._logging:
202 expyriment._active_exp._event_file_log(

/usr/lib/python2.7/dist-packages/expyriment/stimuli/_video.pyc in preload(self)
162 if not self._is_preloaded:
--> 163 self._file =,
164 fse=True))
165 screen_size = expyriment._active_exp.screen.surface.get_size()

/home/analu/.local/lib/python2.7/site-packages/pygame/init.pyc in getattr(self, var)
103 if self.reason:
104 MissingPygameModule += "\n(%s)" % self.reason
--> 105 raise NotImplementedError(MissingPygameModule)
107 def nonzero(self):

NotImplementedError: movie module not available
(ImportError: No module named movie)


103 if self.reason:
104 MissingPygameModule += "\n(%s)" % self.reason
--> 105 raise NotImplementedError(MissingPygameModule)
107 def nonzero(self):


  • Hi,

    the new version of Expyriment (0.9.0) has a new Video stimulus. If you install it in the following way:

    python -m pip install expyriment[video]

    This should allow for mp4 videos to be played.

    Please also check the documentation at

  • Hi,
    Do I need to install Expyriment 0.9.0 and run it using python3? I am asking this because I have several protocols running in Expyriment 0.7.0.

    Thank you.
    Ana Luísa

  • You will need to install Expyriment 0.9.0, yes. But this version runs also under Python 2.7, so there is no need to install Python 3 if you do not want to.

  • Hello again,
    Thank you very much for your answer. It is working now. Nonetheless, I have another question. I want to change the size of the window that displays the video. It is currently very small. I am not sure whether this relates to the resolution because when I display it outside of expyriment (e.g. vlc) I can manage to have the full screen.

    Thank you once again.
    Ana Luísa

  • Hi Ana Luísa,

    it does indeed relate to the resolution of the video. Expyriment does not perform any form of up or down scaling.


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