10Bit Source

NVEnc HEVC 10-bit
No Scaling: https://gist.github.com/sr55/228b827a3f7a7e722234eb47802e6996 (Hardware Decode)
Downscaling to 1080p https://gist.github.com/sr55/bdaf914b2dcf8fa2b703bf3923bdbba8 (Software Decode)

NVEnc HEVC 8-bit
No Scaling -> Encode Failed https://gist.github.com/sr55/2ea15bb200d08816f223f1a024d2ad3b (Software Decode)
Downcale to 1080p OK https://gist.github.com/sr55/72ddf243f54ecc39b67eeab1903f8832 (Software Decode)

8 Bit Source
8 -> 8 https://gist.github.com/sr55/9cd23c2579e545ba1fc8b8109d3375c1 (Hardware Decode)
8 -> 10 (Failed) https://gist.github.com/sr55/0b26f55e15eff89f9402653756d419cb (Software Decode)

@sr55 could you try again if the full path nvdec 8bit -> nvenc 10bit works?

Noted, I'll take a look in a bit.

I'm afraid not

https://gist.github.com/sr55/8302643e5f1d6d12c432729c128b38d4

8-8 was OK

It looks like it thinks it's not a full gpu path, so there is a wrong check somewhere.

Maybe now? Can you try with the latest commit?

8 -> 8 https://gist.github.com/sr55/225a7529268d9299504cdfb638463628
8 -> 10 https://gist.github.com/sr55/e54be68dba7c6d02c394aa6b96661969
10 -> 8 https://gist.github.com/sr55/7140b8375b9a013635d636caf73ef2fc
10 -> 10 https://gist.github.com/sr55/d7d0653480d10de0df2ded3679d2451d

Everything looks clean now.

Thanks!