Please ask metavision_sdk_get_started.cpp why the screen flips left and right after starting EVS to start collecting, thank you!

Please ask metavision_sdk_get_started.cpp why the screen flips left and right after starting EVS to start collecting, thank you!

Please consult metavision_sdk_get_started.cpp. After starting EVS to start collecting, the screen flips left and right.
For example: In the pictures and videos, the text on the side of the book is: QT5 development and examples. Comparing the actual object and the EVS screen, they are in different directions. How can I set this up so that the screen is in a normal viewing angle? Thank you!