maya camera rotation convert to UE4 moviescene sequence camera rotation

https://forums.unrealengine.com/filedata/fetch?type=thumb
Screenshot_20200102151614.png
I am writing the conversion from Maya camera to UE4 camera manually . But I found that camera rotation between Maya and UE was very different.
Can anyone tell me what the background conversion principle of UE is?

I know that post was long time ago. But I solved this importing the camera to blender and then exporting the fbx to unreal.