Odroid H4Ultra - hardware transcoding

[erathia65]

So first, my specs:

Jellyfin 10.9.9 installed via official charts on TrueNAS Scale
Odroid H4Ultra (intel core i3-n305)
32G Sabrent DDR5-4800
4 * Crucial BX500 4to Raidz1

i've been trying to setup my own lil mediacenter, and now and then i got this message, but on specific files:


Thing is there is no obvious difference between the two files:


here are my transcoding settings:


I tried disabling hardware acceleration, not working, even broke the install once, had to redeploy

Got a related error on the client (tried chrome and firefox)


here's the log when i try to play thoses non-working files:
https://pastebin.com/8ai7rpr8

Hope i'm clear enough, please ask if you need any other info to help me solve this