Disruption before fixation point video

Brice

Hello everyone!

I am trying to introduce a dynamic fixation point in my trial sequence. To achieve this goal, I use .mp4 file. The video loading seems works perfectly. However, there is sometimes a kind of disruption (black screen) just before the fixation point video. You can see an example of this problem here : https://youtu.be/wNxuTLgSxrM

To solve this problem, I tried to introduce an empty sketchpad (for a short time – 16 ms) just before the fixation point video. It seems to reduce the number of disruptions, but there are still present.

Do you have any idea of how I can solve this problem? And the potential impact on the target timing presentation (just after the fixation point video).

Thank you in advance!

eduard

Hi Brice,

Weird. The only two ideas I have is (1) Make the background if your experiment black, so that the flicker is not seen. (2) Don't use a video, but an inline script in which you vary the fixdot size dynamically, (probably from within a while loop).

Hope this helps.

Eduard