Export settings on HEVC (H265) codec

Hi everyone! I am trying to export the highest quality and chose the codec H 265.

the problem is that the 4K video frame I shot has parameters Chroma 4:2:2 ; 

when exporting the video frame through H 265, the frame acquires Chroma 4:2:0 .

it is important for me to keep the original values of the video image.