transcode tvh pass stream

[TheDreadPirate]

I'm not familiar with the details of how TVHeadend works.

So the video source is natively VP8. You are having TVH convert it to HEVC BEFORE sending to Jellyfin which then converts it to H264 for your, I'm assuming, browser client. If you DON'T have TVH convert to HEVC before sending to Jellyfin, it fails.

Is that correct?

If that is correct, can you share screenshots of Dashboard > Playback > Transcoding?

Do you have VP8 checked? If you do, uncheck it. VP8 decoding is not support for Arc GPUs. Unchecking it would have the CPU decode the video before sending to the GPU for encoding.