Playing with mpv.
They appear mostly on curvatures when the screen is "moving" vertically.
Woa! Thanks for sharing this! Didn't know that DVD and Blu-ray have efficiency problems. When I don't grab .ISO images, I usually go for Blu-ray remuxes with the highest bitrate I can find. Am I right to assume that higher bitrates helps with banding? I hate banding... XD sorry for sounding childish. It's my day off. :)