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+--- Thread: SOLVED: Help with transcoding (/t-solved-help-with-transcoding)
Help with transcoding - Deegee88 - 2024-06-06
Hello - i've recently moved my server over to ubuntu desktop and installed jellyfin via a portainer stack.
I have an A380 which i'm trying to set up for encoding but it seems very sluggish.
Stack code:
---
services:
jellyfin:
image: lscr.io/linuxserver/jellyfin:latest
container_name: jellyfin
environment:
- PUID=1000
- PGID=1000
- TZ=Europe/London
- JELLYFIN_PublishedServerUrl=192.168.4.86 #optional
volumes:
- /mnt/programs/jellyfin
config- /mnt/programs/jellyfin/cache
cache- /mnt/vault/shows
shows- /mnt/vault/films
filmsports:
- 8096:8096
- 7359:7359/udp #optional
- 1900:1900/udp #optional
devices:
- /dev/dri/renderD128
dev/dri/renderD128restart: unless-stopped
Transcode log: https://sourceb.in/1pQo3NECMk
My system does have dual GPU's but i'm 90% sure that D128 is the A380 and not the other GPU (K2200 i believe).
Any help on what i'm doing wrong would be appreciated.
RE: Help with transcoding - TheDreadPirate - 2024-06-06
Just pass in /dev/dri in its entirety. The Intel driver will then automatically select your Arc GPU. In a multi-GPU setup, which GPU gets assigned to which renderD number is random on reboots.
Code:
devices:
- /dev/dri/:/dev/dri/RE: Help with transcoding - Deegee88 - 2024-06-06
So as long as i have Intelquick sync selected in hardware encoding it'll know to use the A380?
At the moment I have HVEC, H264, VC1, AV1, HEVC 10bit & VP9 10bit selected to be decoded.
and encoding format is just HEVC - not AV1
Does that sound okay?
https://sourceb.in/IUCxzrlP3h
It is still extremely slow...
https://sourceb.in/DDpGovDOlc - another film title which is exactly the same.
RE: Help with transcoding - TheDreadPirate - 2024-06-06
Correct. The Intel driver will automatically select your Arc GPU if you just pass in /dev/dri without specifying a particular renderD device.
Why not enable AV1 encoding?
Also, VC1 decoding is not supported. This table has all the codecs that Intel supports (the far right column).
https://en.wikipedia.org/wiki/Intel_Quick_Sync_Video#Hardware_decoding_and_encoding
Everything except VP8 and VC1.
RE: Help with transcoding - Deegee88 - 2024-06-06
No particular reason it was just setup that way.
Unforunately even with AV1 encoding and changing to /dev/dri it's still very slow.
It's actually quicker to disable hardware acceleration - which defeats the point surely?
RE: Help with transcoding - TheDreadPirate - 2024-06-06
Can you share the ffmpeg log from the "slow" transcode?
RE: Help with transcoding - Deegee88 - 2024-06-06
Yup - i did post them above but here are 2:
https://sourceb.in/IUCxzrlP3h
https://sourceb.in/DDpGovDOlc
RE: Help with transcoding - TheDreadPirate - 2024-06-06
Enable low power encoding (both check boxes). Its required for Arc.
RE: Help with transcoding - Deegee88 - 2024-06-06
Okay - so that has helped a bit but still not perfect. Compared to no hardware acceleration with speeds of 1.5 i'm not getting 0.4 (so double what it was!) but still with some buffering - especially when first starting up.
https://srcb.in/VSwr8VxCus
Is this normal?
RE: Help with transcoding - TheDreadPirate - 2024-06-06
What kernel is your system running? sudo uname -a
BTW, this is what you should be seeing.