Actual video resolution in open sesame
I have some troubles understanding the actual resolution the participants in my experiment see.
I collected data using Open Sesame (and pygaze add-ons) and Tobii pro eye-tracker.
The backend in the experiment is legacy and the experiment resolution is 1024*768
(the default and what is mention in the output file of pygaze).
One of my stimuli is a video with a 1920*1080 resolution, which is also my screen's resolution.
I found out that during the experiment, the video is resized to a larger size, such that only the center part of it is seen on the screen. About 30% of the X axis are trimmed (15% from the right edge and 15% from the left edge); and about 12.5% of the Y axis are trimmed (half of it from the top and half of it from the bottom).
I need to figure out what is the actual video resolution that was displayed, to calculate the correct XY coordinates of areas of interest in the screen - to analyze the eye tracking data.