transcoding CPU threading in docker

[edd-- 2]

Hi,

 

I'm using docker to run emby-server on debian. I have set --cpuset-cpus=0-7 and in the emby server config I have tried the MAX setting, but when I start transcoding, only 1 core is being used @ 100% (using htop). I tried disabling throttling, but that doesn't help either. Does anyone have an idea on how to achieve real multithreaded transcoding in docker ?

 

OR ... am I looking at this the complete wrong way and does 1 single file transcode never spread out over different cores in Emby ? Even without Docker ?

 

Thanks for anyone's insight ...

 

edd--

[Luke 37337]

By default it will use all available cores, and the max setting as well as Auto should be fine. Please note, not all encoders within ffmpeg are support multi-threading, although libx264 does which is the one we use most frequently. I would test it a little more to see if it's happening every time. thanks !

[edd-- 2]

Well, I tried some more and I always only get one core doing the work when playing a movie. (live transcoding)

Transcoding for syncing however DOES use all cores ... is this normal behaviour ?

[Luke 37337]

Transcoding for sync uses a single core by default. You can change this in the server dashboard under Sync settings.

[edd-- 2]

I know, syncing does use all cores, it's live streaming that only uses 1 ...

[Luke 37337]

Hi @@edd--, live streaming does use all available cores, unless you customized this in the Transcoding menu. If you can provide an ffmpeg log then I can demonstrate this to you. You can learn how to do that here:

 

https://emby.media/community/index.php?/topic/739-how-to-report-a-problem/

 

Thanks !