is the 4k video jerky for everyone else?
the old plex media player plays 4k perfectly, but todays release of the new HTPC app plays all 4k really jerkily… (at first i thought maybe it was transcoding for some reason, but i checked and it wasn’t)
any chance this is gonna be fixed?
just tried the latest beta and the same jerkiness is still there : (
(same stuff plays perfectly/smooth on the older plex media player app)
I´m having a similar problem on my end. For me, however, it only affects 1080p content, 4K stuff is perfectly smooth. (only 1 dropped frame every 1,5h and no visible juddering).
1080p content is juddering like crazy but not dropping frames.
What I found out is changing the vsync setting in the Nvidia control panel to “on” fixes this, but leads to many dropped frames. (20+ in 20min) Reinstalling windows and/or reinstalling the GPU driver does not change any of this, unfortunately. I have also tried running it with Vulkan and there it is not present. This happens with the shipped mpv as well as with a third-party mpv library.
Testing was done on a windows 10 pc with an RTX3050 - resolution and refresh rate switching turned on. The log file includes a 30s playback of a 1080p file and a 30s playback of a 2160p movie.
Plex HTPC-broken-1080p-playback.log (876,1 KB)
Many others have discovered that non-default NVidia settings due lead to a significant drop in performance. You may want to try setting your settings to default or create a profile for the HTPC app that uses only the default NVidia settings.
thanks for the reply… alas i don’t have an nvidia… just an intel “surface pro 6”
it’s just weird… the older plex media player plays everything as smooth as butter… but the HTPC app is unusable (for 4k) : (
That has a UHD Grahpics 620 which is an extremely low power GPU. You will need to change the Video → Video Playback Quality setting to Low Quality (ANGLE Renderer). Additionally you may want to try experimenting with putting these in your mpv.conf:
hdr-compute-peak=no manual
gpu-dumb-mode=yes manual
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Well, on my system I have not touched the Nvidia Settings except for changing the display output from RGB to YCbCr444 and just for testing the VSYNC settings. (have been restored to defaults after testing)
I will try to gather the mpv logs, maybe there is something noted.
yea that doesnt help… and again 4k is smooth as silk in the older plex media player.
edit- actually i take that back : ) : (
trying normal quality angle renderer did in fact fix the jerkiness : )
my question is… is the video quality in this normal quality/angle renderer any worse than the default in plex media player?
Well, on my end it was a broken Nvidia driver. Studio Driver 516.59 and 516.93 are broken for me, I could not even select true 1080p modes… Just 4Kx2K 1080p modes which are kinda useless and in conjunction with mpv + 1080p files would lead to massive stuttering. The stuttering was also present in the standalone mpv player. Rolled back to 512.96 and everything is fine again.
It is actually higher quality that PMP had but it is only different when it is scaling the video (like playing 720p content on a 4k display). The Low Quality (ANGLE Renderer) is going to be the equivalent of the default in PMP.
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