x265 Mkv 10bit hevc done by Gangsternerd encoders using staxrip
are fake or "home made" 4k/uhd with bad encoding ,try another video .
There are NOT any DEMO or real video with this encoding
wiki report :
The Still Picture profiles can use an unbounded level, level 8.5, for which no limit is imposed on the picture size.[8] Decoders for level 8.5 are not required to decode all level 8.5 bitstreams, since some may exceed their picture size capability.
UHD /4k true video not use this encoding.
Topic: Main@L8.5 profile (Read 4713 times)
