HW decoding HEVC w/Jellyfin doesn't work when subtitles enabled

[nyanmisaka]

HW decoding HEVC w/Jellyfin doesn't work when subtitles enabled

[bbklopfer]

Update: I'm guessing the previous version of latest-rockchip was nyanmisaka/jellyfin:240117-arm64, so I pulled that and it works as expected: with HW decode (and encode) enabled, subtitles appear as expected.

[nyanmisaka]

@bbklopfer
That’s the expected behavior since Rockchip changed their librga kernel API last year. You have to update the BSP kernel to 5.10 rkr6 to get the fully-functional subtitle burn-in output.

You can simply install https://github.com/Joshua-Riek/ubuntu-rockchip instead.

[bbklopfer]

Thanks so much!

[bbklopfer]

Follow up in case anyone ended up here with a similar question:

I installed the kernel from https://github.com/Joshua-Riek/ubuntu-rockchip , but unfortunately am experiencing higher power usage (~2x power consumption at idle), increased thermals, and a load average that won't go below 1.00 ( Joshua-Riek/ubuntu-rockchip#606 ). I did verify that the transcoding works as expected, however.

[nyanmisaka]

Follow up in case anyone ended up here with a similar question:

I installed the kernel from https://github.com/Joshua-Riek/ubuntu-rockchip , but unfortunately am experiencing higher power usage (~2x power consumption at idle), increased thermals, and a load average that won't go below 1.00 ( Joshua-Riek/ubuntu-rockchip#606 ). I did verify that the transcoding works as expected, however.

This distro is mainly for desktop applications. Rockchip's default cpu/gpu governor can cause high latency or lag. So they set the governor to performance by default.

https://github.com/Joshua-Riek/ubuntu-rockchip/blob/main/overlay/usr/lib/systemd/system/cpu-governor-performance.service
https://github.com/Joshua-Riek/ubuntu-rockchip/blob/main/overlay/usr/lib/systemd/system/gpu-governor-performance.service

[bbklopfer]

Thanks! Unfortunately performance governors don't appear to be the issue (or at least, not the whole issue) --- the same set of issues happens with the stock Orange Pi Debian userspace if I install the kernel from https://github.com/Joshua-Riek/ubuntu-rockchip (that userspace uses ondemand and simple_ondemand for CPU and GPU, respectively).

I wasn't super careful with looking at the thermals/power with this userspace though, so perhaps it is a little better; but it certainly runs hotter than the Orange Pi issued kernel, and the load average = 1 bug persists.