App crash when click on grab frame.

[TripleSM]

System.OverflowException
HResult=0x80131516
Message=Arithmetic operation resulted in an overflow.
Source=System.Private.CoreLib
StackTrace:
at System.IntPtr.ToInt32()
at WinUI3_DirectShow_Capture.MainWindow.d__132.MoveNext() in C:\Workbench\WinUI3_DirectShow_Capture-master\MainWindow.xaml.cs:line 309

[castorix]

I cannot reproduce this problem (Windows 10 21H1, unpackaged, x86 or x64)

[mimregit]

You probably run the app in 64 bit mode.
The problem occures, when copying the DIB to the byte array.
Marshal.Copy(new IntPtr(pDIB.ToInt32() + 40), pManagedArray, 0, nSize);

Use instead:
Marshal.Copy(new IntPtr(pDIB.ToInt64() + 40), pManagedArray, 0, nSize);