Iām amazed people are using XPlay on their OLEDs. It simply doesnāt work correctly with UHD rips. I posted over in the LG C7 AVS forums, but for those who donāt frequent those boards, hereās your info:
TLDR: Donāt bother with XPlay or playing 4K HDR movies on the TV itself.
Long version:
People around here (that know me, at least!), know what a stickler I am for making sure things work 100%. When I got my 65C7, I was excited by the prospect of getting a UHD drive and ripping my movies for playing in X-Play or the built-in DLNA server (or, of course - via USB drive). My excitement was tempered by glitches - always repeatable - showing as split-second/blink and you miss it macro-blocking-like glitches during various movies.
Primo-example: The Lego Batman Movie. At ~7:35 into the movie, Joker says, āIām all ears,ā and as he says that, thereās a macro-blocking-like glitch in the video, and then thereās more glitches a little later (seconds, not minutes later), and randomly throughout the movie.
What is going on here? Is my UHD drive not ripping these movies correctly, is the disc damaged? I called a buddy of mine over in England, whoād just bought the 65B7 over there and was busy ripping his collection of UHDs, and he encountered the EXACT same issue at the exact same time-stamp.
Now, I didnāt have any other devices that can play 4K HDR MKVs direct-play, so I chalked it up to bad ripping, and let it go. But it turns out that other movies are having the same issues - and it started to drive me nuts. Harry Potter movies - for example, had sporadic glitching (but always at the same time-stamp), too.
Well, Plex Media Server has been updated and now direct-streams 4K HDR to the Apple TV 4K - which I have (audio is still transcoded, but thatās fine for this test). I can confirm that there are ZERO glitches in 4K HDR playback using the Apple TV connected to the LG C7 OLED.
Bottom line, the 2017 (canāt speak for the 2018 models) LG OLEDs built-in software simply donāt do a good enough job with 4K HDR MKVs from UHD Blu-rays, so you should look elsewhere for a device to connect to do it better.