No flip option on nvvideoconvert

nvvidconv had the “flip-method” property, but there is nothing like that on nvvideoconvert. How are you supposed to flip the video image on a nvarguscamerasrc using Deepstream 4.0?

https://devtalk.nvidia.com/default/topic/1058270/deepstream-sdk/nvvidconv-vs-nvvideoconvert-ds-4-0-nano-/post/5366862/#5366862
Jetson platform has VIC hw engine module, but Tesla platform does not have.
There are some features in progress for nvvideoconvert