h264 instead of HEVC

[Stephan]

Hello Everyone.

I spent some time searching here for this. Saw people talking about it but havent found a solution for my situation.
All clients i tested transcoding with result in h264 insteaf of hevc or AV1. I configured the Server as described in the wiki.
Setup feels correct as i can use ffmpeg from shell to transcode HEVC and AV1 using A380(vaapi) with great performance btw
intel_gpu_top works and shows that transcode is done by the a380

My idea was to have better quality with HEVC or AV1 at lower bitrates. (On reddit people were stating HEVC is better choice with ARC)
Especially when i am on Travel there is often only 4-6Mbit available.

The Server:
AMD System with a Intel Arc A380 i bougt to play with.
OS is Archlinux and JF is latest AUR
I trief the JF-ffmpeg(6.0.1-Jellyfin) and the one thats latest aur(n6.1.1)


The Clients i had tested:
Win10 Laptop with Chrome and Edge 
LG Webos with JF client from the Appstore
Iphone 14

Thanks to this forum here i learned that the client decides the target codec. I was not able to find the reason why clients request that codec.
Anyone has a idea how to make it work with HEVC or AV1?

Thanks!
Stephan