NVDEC Settings

[_Nick]

Hi all,

I'm configuring NVDEC hardware decoding in Jellyfin for my RTX 3070 Ti, and I need clarification on how HEVC RExt (8/10bit, 12bit) is implemented.

According to NVIDIA’s NVDEC matrix, my GPU supports:

✅ HEVC 4:2:0 (8-bit, 10-bit, 12-bit)
❌ HEVC 4:2:2 (8-bit, 10-bit) → NOT supported
✅ HEVC 4:4:4 (8-bit, 10-bit, 12-bit)

The issue: Does Jellyfin’s HEVC RExt setting apply only to 4:4:4 (which my GPU supports) or does it also include 4:2:2 (which my GPU does NOT support)?

If HEVC RExt includes 4:2:2, then enabling it could cause problems. But if it’s only for 4:4:4, then I should tick it?
Has anyone tested this, or can the devs clarify how Jellyfin handles these two settings?

Thanks!
Nick


   


   

[TheDreadPirate]

Since the 3070's NVDEC doesn't support 422 HEVC 8/10 bit (what a weird omission), you should leave RExt 8/10bit unchecked but you CAN check RExt 12bit.