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I have 4 groups of 64 videos which will be played by Opensesame. In one of my group, the sound of the videos is lower than in the other groups. So I would like to normalize the audio of all my videos. How can I do that ?
You can do that in Python. This discussion on Stackoverflow looks promising:
I think it would make sense to do that in preparation of the experiment, so that you don't have to do this every time you are running the experiment.