SOLVED: 4K HEVC HDR not decoding in WebOS app

[DrGoldberg]

Hi!

I'm using Jellyfin 10.8.13 installed on Windows 11 as Windows Service on an Intel NUC with an 12th Gen Intel Core i7-1260P with it's GPU Intel UHD Graphics Version 31.0.101.5084 and 16GB RAM.

Now I can't play 4K HEVC HDR content on a 1080p LG TV with WebOS. On this TV the Jellyfin app from WebOS is installed. I always get the error "This client is not compatible with the media and the server is not sending a compatible media format".
When playing the content on a TV that supports 4K I have no problems playing it.

It is also not working when using Google Chromecast on that TV.

I think the transcoding is not working properly.

Hardware acceleration is enabled with Intel QuickSync (QSV)
Transcoding settings:

• Hardware acceleration: Intel QuickSync (QSV)
  
• Enable hardware decoding for: everything
  
• Prefer OS native DXVA or VA-API hardware decoders: true
  
• Enable hardware encoding: true
  
• Enable Intel low-power H.264 hardware encoder: true
  
• Enable Intel low-power HEVC hardware encoder: true
  
• Allow encoding in HEVC format: true
  
• Enable tone mapping: true
  

All other transcoding options are as per defaults.

Logs are attached.

Hope you can help me with this problem.

greetings

[TheDreadPirate]

The problem is that you have a1080P TV and the output of the transcode is 4K. The CCwGTV 4K is handling the down-scaling. It seems that the WebOS app is not.

Code:

Output #0, hls, to 'C:\ProgramData\Jellyfin\Server\transcodes\3f0b615558618a65bb69f5ce9f444ad6.m3u8':
  Metadata:
    encoder         : Lavf59.27.100
  Stream #0:0: Video: h264, qsv(tv, bt709, progressive), 3840x1608 [SAR 1:1 DAR 160:67], q=2-31, 8404 kb/s, 23.98 fps, 90k tbn (default)

In the WebOS app, there may be a setting to limit the transcode resolution.

[DrGoldberg]

Thanks for your reply.

That helped. I had to set the bitrate for network quality quite low (720p - 4 Mbps). With this it is working on the WebOS app.

[TheDreadPirate]

In the web client there is a global setting to limit the transcode resolution. In the web client you click on your user icon in the top right and click on "Playback" and there is a dropdown to select a max transcode resolution. Does the WebOS client have something similar? Instead of having to use the quality selector during playback.

[DrGoldberg]

Yes, in the WebOS client you can do it exactly the same way as it is in the web client.

But actually (I use Jellyfin only in my local network) I only had to limit the setting "quality of the home network".

The value of "Maximum Allowed Video Transcoding Resolutin" I have left on "Auto"

So in WebOS app:
User profile --> Playback --> quality of the home network --> Select value that works for you (try till one works )