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rigaya / VCEEnc

VCEによる高速エンコードの性能実験
https://rigaya34589.blog.fc2.com/blog-category-12.html
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Green bar artifact when using --avhw at 4K #15

Closed Vrael0n closed 3 years ago

Vrael0n commented 3 years ago

I'm getting a green bar across the top of my encodes when using --avhw on 4K HEVC NVENC OBS recordings. The problem does not occur when using --avsw. At first I suspected it may be related to GTX 1xxx (Pascal) NVENC being unable to use CABAC with HEVC, however, the problem does not occur with 1080p NVENC clips so I am not sure. I have attached an image showing the artifact, and a link to the source video file I am encoding so it can be tested with other VCE hardware.

CL: C:\Users\NAS\Downloads\VCEEncC_6.06_x64>VCEEncC64.exe --avhw --input "C:\Users\NAS\Remote\OBS Recordings\2020-11-15 18-44-45.mkv" --codec hevc --profile main --tier main -u slow --cqp 24 --colorrange auto --colormatrix auto --colorprim auto --transfer auto --audio-copy --output "C:\Users\NAS\Remote\OBS Recordings\2020-11-15 18-44-45 VCE.mkv"

Info: VCEEnc (x64) 6.06 (r657) by rigaya, Nov 9 2020 11:56:01 (VC 1927/Win/avx2) OS Version Windows 10 x64 (18363) CPU: AMD Athlon 3000G with Radeon Vega Graphics (2C/4T) GPU: AMD Radeon Vega 3, AMF Runtime 1.4.17 / SDK 1.4.16 Input Info: avvce: H.265/HEVC, 3840x2160, 60/1 fps Vpp Filters copyDtoD Output: H.265/HEVC main @ Level 5.1 (main tier) 3840x2160p 1:1 60.000fps (60/1fps) avwriter: hevc, aac => matroska Quality: slow CQP: I:24, P:24 VBV Bufsize: 40000 kbps Bframes: 0 frames Pre Analysis: off Ref frames: 2 frames LTR frames: 0 frames Motion Est: Q-pel Slices: 1 GOP Len: 600 frames VUI: matrix:bt709,colorprim:bt709,transfer:bt709,range:full Others: deblock

Source Video [556MB]: https://drive.google.com/file/d/1npWVqjoOw68mQAbDTFuabdC1yDYqiOYM/view?usp=sharing Output Video [200MB]: https://drive.google.com/file/d/1XVlC1_NAlGaP99yIDXPedFCZzLyT431w/view?usp=sharing

Image (green bar artifact on top): 2020-11-15 18-44-45 VCE mkv_snapshot

rigaya commented 3 years ago

Thanks for the samples, I was able to reproduce the green artifact. However I'm not able to find out what is causing this issue... I'll check further from now.

Vrael0n commented 3 years ago

I have uninstalled, wiped, and fresh reinstalled the latest Radeon driver and the problem is gone. Can you confirm a driver update fixes it for you too?

rigaya commented 3 years ago

Thanks for letting me know, reinstalling the Radeon driver to the latest version fixes the problem!

I'll close this issue as the problem has been solved.