C8 horizon blurry/fuzzy picture with h264 native usb/plex playback.
Anyone with the same issue. There is some sort of horizon blurry line on edge of face, shirt with any video 720p, 1080p with h264 codec. This only happen when playing via LG default media player thru usb and via plex which use the LG native support to playback video. Video with a lot red show the worst, like red edge on spiderman suit. At first I thought it was the video setting, changing everything from motion, noise setting to super resolution does nothing. But I test the same video with native playback on ps4, chromecast. The picture edge are perfectly smooth. So I narrow it down to the native support of Lg video processing of h264 playback. The LG picture quality on native playback of 4k Hevc h265 is perfect.
For the first picture, look at the neck area between the shadow and chin. The second picture I attach below with spiderman show the smooth side on left and the fuzzy side to right. I drew a green line of what the edge between black and red look to me on each side. To me it look like soft scans line when watching video.