BUG - Something wrong with codecs on Plex player and Plex HTPC for Windows (4k hevc)

Plex Players Desktop Players
1

Server Version#: 1.32.8.7639
Player Version#: 1.8.4.1
Player Version# (HTPC): 1.53.0

When I play certain 4k HDR HEVC files on Plex or Plex HTPC for my windows PC’s i get a weird stutter on the image, the files are direct play so no transcode.

If I open the file in Mediaplayer-Classic or VLC they work fine.
If I open the file in Plex Web on my Edge browser they work fine.
If I open the file in PlexforKodi they work fine.

It seems to be a codec in need of update.

2

The Plex players to apply some very computing-intesive filters by default. With 4K content, this can absolutely overwhelm even newer systems, if they are not in the top
powerful range .

Go into the settings and play with the “Video Quality” and “Hardware Acceleration” toggles.

3

Not sure what kind of answer that is ?
If its not a problem on some players and a problem on others its not freaking performance now is it ?

4

What hardware do you have? Can you please share the Plex HTPC logs after playing such a stuttering file?

5

Problem presents both on my Intel NUC11TNKi5 and my AMD 5950x with GTX4080
Log is from the latter.

Plex HTPC.log (331.5 KB)

6

Okay, your hardware (especially the RTX4080 system - the nuc might be to slow…) should be plenty for 4k hevc playback. For some reason, I can not download the .log file… May I ask if you could upload it again as a .txt?

Never mind, my pc needed a reboot (wtf??) and now I could download the file…

7

Okay, after examination of your log. I found this:

  Seekable: true
  Partially seekable: false
  Paused for cache: false
  Buffering state: 100
  Frame drop count: 96
  Time: 200.49 / 3109.66 (6.45%)

You are dropping a lot of frames… There is something very wrong. However, there are some things you should try.

  1. change the power mode of your gpu to “maximum” =>

    image
    image824×607 117 KB

  2. create/modify the mpv.conf file and add
    vo=gpu-next

… and try again.

  1. Use a never mpv.dll =>
  1. Change Video playback quality from normal to low in the Plex HTPC settings. Low does not mean bad - it is more of untouched MPV quality (which is already very good)
8

Just FYI
11th gen NUC can hardware render 4k 60hz and support HEVC decodig (why i bought the thing)

Now since as you said yourself i should have plenty of horsepower in th big rig so i skipped the tuning steps and updated the DLL and low and behold; problem solved on Both machines and both pieces of software.

Maybe someone should get that fixed with the next player update.

Fixed by getting the DLL from this post:

9

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