SOLVED: HEVC transcoding/direct play issues

[Deegee88]

I'm having issues playing certain files on my TV through the jellyfin app, the below is LOTR and this doesn't play at all.
I also have a copy of another film which only shows in black and white.
The files work on VLC player on the PC fine but not on tv or through iphone app.

I currently have no hardware encoding enabled (i dont have a dedicated GPU although i have an A380 coming soon!) and when i did enable it it didn't make any difference.
I did enable "Allow encoding in HEVC format" which changed the log from direct stream to transcode but it still has the same error message.

Jellyfin is running on truenas scale:TrueNAS-SCALE-23.10.1.3
intel xeon Intel® Xeon® CPU E5-1650 v3 @ 3.50GHz
64gb ram

https://pastebin.com/SL4wH4Kp - direct stream log
https://pastebin.com/wfTYHA4b - transcode log

Any thoughts would be greatly appreciated!