Cant get hardware transcoding to work

[emailbin11]

So I uninstalled Ubuntu and installed Debian instead, and have everything up and running again but am running in to the same issue


Main jellyfin log: https://pastebin.com/EyDuvFkM
ffmpeg log: https://pastebin.com/x4EFmG7H

When I attempt to view it in Firefox in the jellyfin web UI:
It appears to attempt to request the same 447.01 mb file over and over again, when i open it on firefox directly it says: 'no video with supported format and MIME type found'

If I open it in Chrome it appears to send video at nearly 1gbps/second to the client
It streams 9 seconds and then pauses

this is the media info I get for those 9 seconds
Playback Info
Player
Html Video Player
Play method
Transcoding
Protocol
http
Stream type
HLS
Video Info
Player dimensions
1509x557
Video resolution
1920x800
Dropped frames
0
Corrupted frames
0
Transcoding Info
Video codec
H264
Audio codec
AAC
Audio channels
2
Bitrate
293.6 Mbps
Transcoding framerate
46 fps
Reason for transcoding
The container is not supported
The video codec is not supported
The audio codec is not supported
Original Media Info
Container
mkv
Video range type
SDR

If I wait it will continue at a lower streaming quality, and then pause again (downloading about 5gbs in 20ish seconds)