I am trying to use the MovieStim3 class to create a stimulus which will play a .mp4 movie, but I can’t seem to get it to work. When I call the play method nothing happens. Here is an example of the code I am using.
from psychopy.visual import Window, MovieStim3 # create the window and stimulus object w = Window(screen=0, size=[1280,720], units='pix') f = '<path/to/movie>' s = MovieStim3(w, f, volume=0, size=w.size, units='pix') #play the movie s.play() # this call returns but nothing happens
I can play the video by manually drawing each frame and flipping the window.
n_frames = 613 # I happen to know the video is made of 613 frames for iframe in range(n_frames): s.draw() w.flip()
What gives? I have attached an example of the video I am trying to play (I guess mp4 videos are not a supported format), and I am using PsychoPy version 2021.1.3