Jellyfin Transcoded 4k Content Dropped Frames In Chrome

[planedrop]

Hoping to get some help digging into this one, I did do some digging online, found a few threads with some similar issues but no resolutions. 

I am doing some testing with transcoding some 4k content (just recorded SDR content, 87Mbps, so no tone mapping or anything), performance of the GPU (2060 with NVENC enabled) seems to be totally fine, but for some reason if I try to transcode this 4k 87Mbps stream down to 4k 80Mbps or 1080p 60Mpbs, I get stuttering/dropped frames and bufferstalled errors in Chrome's inspection tools. 

So it doesn't appear to be network related, unless this is some bitrate spike issue, since the 87Mbps plays super smooth. I'd also doubt this anyway since this is a 10GbE connection from client all the way to the server.

Additionally, the 2060 seems to be handling this just fine, it doesn't take long to transcode the entire clip and then stops having any load on it (clip is only about 1 minute). 

Any ideas what would be causing lower bitrate content to drop frames like this? 

I am going to do more testing w/ my Shield and my Google 4k Streamer to see if this is a Chrome/Chromium specific issue, but posting about it anyway since I feel like it should work?

[TheDreadPirate]

What server version and what OS?

[Fate]

besides of what TDP asked... what hardware does your server have?

[planedrop]

Thanks for the responses, sorry for replying late, email notifications don't seem to be working.

Server is running Ubuntu Server 24.04 LTS and Jellyfin server version is 10.9.11.

As for the hardware, this server is running a Threadripper 3970X as the main CPU for the Hypervisor host, with 96GB of RAM. The VM though is assigned 8 threads, 8GB of RAM, and has a RTX 2060 passed through (confirmed NVENC encoding is working).

As I mentioned though, streaming any other bitrate is fine, and the GPU finishes transcoding the higher bitrate stuff super fast (I can monitor with nvidia-smi and it only has a process on the GPU for like 5 seconds for this 15 second clip, but the clip still stutters).

So I don't think it's hardware related, but maybe something with Chrome?

I'll get to more testing over the weekend to see if the same stutter happens on other devices.