SOLVED: 4K Not playing on Google Streamer

[yeahzoomzoom]

I'm having a hard time getting 4K videos to play on my new Google TV Streamer, and even a harder time finding basic instructions on how to configure the correct transcoding options (and even if I need transcoding.)
When I play the video, I get audio, but the screen stays black. My logfile isn't very informative. The only error I see is:

"[WRN] [156] Emby.Server.Implementations.HttpServer.WebSocketConnection: WS "192.168.0.163" error receiving data: "The remote party closed the WebSocket connection without completing the close handshake."

I know details are important, so here's what I'm working with:

Windows 11
Jellyfin server 10.10.4
NVIDIA 3060Ti


Video file:      video.mkv
Codec:          MPEG-H Part2/HEVC H.265
10 bit
Resolution:    3840x1608
Frame Rate:  23.97 FPS

Jellyfin settings tried:

Transcoding

Test 1
Hardware acceleration off 
Result: audio only, black video

Test 2
Hardware acceleration Nvidia NVENC
Enable hardware decoding for HEVC, HEVC 10bit


Enable enhanced NVDEC decoder

Enable hardware encoding

Allow encoding in HEVC format


In all instances, i got audio only, and no video. and the only error in the log was closed without handshake

All of my 1080p content is playing fine.

I'd greatly appreciate some additional troubleshooting assistance.

Please let me know if I need to provide more details on my hardware setup, my Jellyfin settings, or the video file itself.

Thanks!