Shotcut has black lines around the edges

Hello, I have recently finished editing my video, but I realized that there were some black bars on the edges, im not sure if it is from OBS or from shotcut, the video is here, If it comes from Shotcut how can i fix it ?

What was the resolution and aspect ratio of your original video? And what Video Mode (found in “Preferences”) did you use for your project?

The original video was 1920 by 1080

And what was the Video Mode you used?
Also what were your exporting settings?
Did you add any filters to the video?

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