keep showing the last frame of the video during subject's button press
I'm trying to create an experiment with short video excerpts showing emotional faces.
For each video the subject should press space as soon as he recognizes an emotion on face, then 4 buttons should appear at the bottom of the screen containing the labels of 4 different emotions one of which the subject should select. What I can't obtain is to keep showing the last frame of the video during subject's choice of emotion category. Thank you in advace,