Why is the screen divided into 2 parts when watching a video in powerdvd?

Question

C++ / C#

Hello everyone
. I turned on the movie in mkv format in powerdvd and the screen was divided into 2 parts and I don’t know how to change it.
Thanks

Answer 1

default(T) evaluates to the default value for type T.

Given a variable t of a parameterized type T, the statement t = null is only valid if T is a reference type and t = 0 will only work for numeric value types but not for structs.The solution is to use the default keyword, which will return null for reference types and zero for numeric value types.

Answer 2

Entered in Google
c# default
The first link leads to the official documentation.
Coincidence? More likely...