Hardware Decode (--avhw) fails when source is AV1

[Vrael0n]

Using the hardware decode flag on an AV1 video causes an error. Using software decode (--avsw) works.

Error:

cuvid: cuvidParseVideoData error
failed to init decoder.

Environment Info:
NVEncC (x64) 7.08 (r2398) by rigaya, Dec 29 2022 09:40:33 (VC 1929/Win) [NVENC API v12.0, CUDA 10.1]
OS : Windows 10 x64 (19044) [UTF-8]
CPU: 13th Gen Intel Core i5-13600K [5.12GHz] (6C/12T)
RAM: Used 9499 MB, Total 32532 MB

GPU Info:
Nvidia Driver Version 527.56
#0: NVIDIA GeForce RTX 4090 (16384 cores, 2520 MHz)[PCIe4x16][527.56]
Avaliable Codec(s)
H.264/AVC
H.265/HEVC
AV1

Command:
NVEncC64.exe --avhw --codec av1 --preset P7 --profile main --tier 1 --output-depth 10 --qvbr 20 --max-bitrate 800000 --aq --aq-temporal --mv-precision Q-pel --lookahead 32 --output-buf 32 --colorrange auto --colormatrix auto --colorprim auto --transfer auto --max-cll copy --master-display copy --audio-copy -i "E:\OBS Capture\2022-12-29 05-55-38 ffmpeg copy trim 3s.mkv" -o "E:\OBS Capture\2022-12-29 05-55-38 ffmpeg copy trim 3s NV-AV1.mkv"

Source video:
https://drive.google.com/file/d/1C0PK-6GOAWbyyo6TioZgmTdNUGGC2o_t/view?usp=share_link

Debug log:
log.txt

[Vrael0n]

I have verified my GPU can hardware decode this video in MPV

Light level blowout because Windows screenshot does not support HDR

[rigaya]

Yes, we currently have this problem.

I currently not being able to fix this, I might need it switch back to --avsw for now, and check further in the future.

[rigaya]

I think I've now found the cause. I'll have it fixed in the next release.

[rigaya]

Thank you for sharing the error with me.

NVEnc 7.09 shall fix AV1 hw decode error.