hello to all and sorry for my English I'm taking a translator, I have a little problem, I have 4 Dahua cameras installed and I'm connected in hdmi to a 43-inch tv, on the 4 cameras I can see 2 sound cams on the M stream, that is to say the main stream, but the other 2 are on S2 secondary stream and the image is not beautiful, even if I try to click on the M it always comes back to secondary stream 2, I have did a lot of test but not able to go back to main stream and have a nice image thank you for your help