TV Scan Lines shader

Hi !
i wonder how to create TV Scan Lines like this exemple Retroarch - BSNES - CRT Geom filter - YouTube
I triyed this turorial A new, community-hosted Unreal Engine Wiki - Announcements and Releases - Unreal Engine Forums
but this is not real scanlines pixels like we can see here http://timothylottes.blogspot.jp/2014/08/scanlines.html

Anyone got experience about it or can help please?