Fail To Play Sequence Of Mp4 Videos Across Trials

I have 10 trials and two conditions (randomized across the trials) that consist of playing either an optic flow mp4 movie or a random flow mp4 movie. To load and play the mp4 I use

Solution 1:

Try inserting:

optic_flow_movie.seek(0)
random_flow_movie.seek(0)

in between the two for loops, so each movie gets reset to its start frame before getting played again.