I bought the Verbatim 43888 (LG BU40N) to rip my 4K UHD, and once it was on Plex I noticed the motion seemed off, so I recorded in slow motion and watched. Sure enough, the frame-rate is very inconsistent. I then did the same slow-mo recording with the actual disc in a 4K Player and the disc played very consistently. See video I made here https://www.youtube.com/watch?v=CuA7_KrD-Os see 44 second mark and 1:04 mark for some especially bad skips, but the whole thing is bad. Everything after 2:00 mark is recorded from 4K player playing the actual disc and is very good. Compare 1:04 to 3:04.
I actually slowed the video down 80x to do a stop-watch between each frame. The ripped file came back:
3.18
2.70
4.01
2.80
3.95
2.70
The UHD disc video at 80x slow speed:
3.31
3.31
3.31
3.31
3.35
3.36
(I'm more impressed I was able to be so consistent on the stop watch).
So there's a lot of things it could be, so let me tell you what I've done (please note #2 should eliminate a lot of the usual issues).
1. Tried using handbrake 4 separate times with various settings. Conversions are all off exactly the same way as the MKV. (frame-rate same as source, constant frame rate (which True Lies is), tried interlace detection decomb and off, CQ 20)
2. Tried playing MKV directly on a computer with MKPlayer and Elmedia Player (and Handbrake conversion on Quicktime). They all showed frame rate issues at the exact same spots. (Computer is Mac Studio with M1 Max processor)
3. Because of #2 above, bandwidth to Plex isn't the issue, because I tried directly off SSD on my Mac but I'm hard-wired with CAT6 10GB with high-end modem and router if you're wondering, but again, it did it straight on the computer.
4. HDMI cord or TV's HDMI port. Although #2 could rule this out, I still tried swapping the HDMI cord (leaving input intact) that AppleTV's running Plex on and the Bluray player, and it was the same issue.
5. I have not tried re-ripping the same disc because I went to a bunch of other movies I ripped and see the same issue (but not on 4K bluray player)
All this leads me to one of three conclusions:
1. The Bluray player is just better than everything else at processing the files. Better than Plex, MKPlayer, Elmedia, and Quicktime (seems unlikely).
2. Something's happening in the ripping process.
3. Something's wrong with the Verbatim 43888 (LG BU40N)
Any ideas?