HEVC transcoding stopped working in 10.9.3 (Intel QSV)

[TheDreadPirate]

Just for my curiosity; that happens on non 4k files as well right?
Because I'm not sure what the limits are of Gemini Lake's hevc encoder.

You have intel-media-va-driver-non-free installed right? Because HEVC encoding is not supported in the "free" version of the driver.
I don't think your GPU needs "intel-microcode" from the "non-free-firmware" but it wont hurt.

Are you loading any guc via /etc/modprobe.d/i915.conf ?

I can take a deeper look later when I'm back home since I have very similar setup. (j5005, proxmox, lxc container)

FYI, Fate, jellyfin-ffmpeg comes with all of the user space drivers needed for transcoding, except the Intel OpenCL driver.  For the official docker image, it also includes the OpenCL driver.

Regarding dmesg, if you go to /var/log there will probably be serveral dmesg log files.

Code:

-rw-r-----  1 root    adm              103203 May 11 01:07 dmesg
-rw-r-----  1 root    adm              103445 May  3 20:14 dmesg.0
-rw-r-----  1 root    adm                25082 May  1 14:23 dmesg.1.gz
-rw-r-----  1 root    adm                24654 Apr 29 13:47 dmesg.2.gz
-rw-r-----  1 root    adm                24821 Apr 29 12:03 dmesg.3.gz
-rw-r-----  1 root    adm                24536 Apr 28 20:47 dmesg.4.gz

If you "grep i915 dmesg.0" or "zgrep i915 dmesg.1.gz", etc., it will search the older dmesg files for the i915 driver logs.

And the debug log doesn't appear any more informative.

Can you look in /var/log/messages?  That is your system log and may help us find why jellyfin is crashing hard.

One thing worth trying is to disable HEVC iGPU decoding.  In Dashboard > Playback can you uncheck HEVC and HEVC 10-bit?