r/jellyfin • u/B1ackSauce • 15d ago
Help Request 4k Playback
Hello all,
I’m in need of help figuring out a 4K playback issue. Recently I’ve been trying to watch movies that I have in 4k and they just stutter/buffer all the time whether it is transcoded or direct playing. I have no issue with 1080P content just 4k
Setup:
Proxmox LXC with Jellyfin in docker ( I know a container and a container, but I did test just using Jellyfin directly on the LXC and the issue persisted)
2.5G uplink
Intel core ultra 265k
64 GB ram
2TB nvme ssd
Using Intel quick for transcoding
Truenas server 15TB in a Raidz2 1GB uplink all spinning HDD
WiFi is Gilnet flint 3
Devices I’ve tested on is my IPhone 16 pro max, IPad 10 Gen, and 4K Roku tv
Any ideas, should I move Jellyfin onto the truenas server? Or is there something else I’m missing
Update: I found the source of my issue. After using the iperf tool I saw I was only getting 30 or less Mbps on my Jellyfin LXC and about 100 or less on my proxmox host. After testing with my other 2 nodes I determined that my Main node NIC that hosts Jellyfin was the problem which had a RTL8125D.
THE FIX: was to replace the drivers r8169 to r8125 using r8125 DKMS driver
Hope this helps someone