Hello. Recently I purchased a brand new GPU - AORUS GeForce GTX 1080 Ti. I found out that it supports HEVC 10-bit encoding, so I wanted to give that a try. I googled for HEVC encoding using NVENC and stumbled across this thread. I used the ffmpeg command based on the script I found here, but unfortunately, after encoding I noticed some artifacts, which occur in dark scenes and last one frame of the video. You can see them on these screenshots: I was wondering if you could help me figure out what might be the cause of these artifacts and how I can get rid of them. Here is the MI of the source video: Code: ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : High@L4.1 Format settings, CABAC : Yes Format settings, ReFrames : 4 frames Codec ID : V_MPEG4/ISO/AVC Duration : 2 h 2 min Bit rate mode : Variable Bit rate : 29.5 Mb/s Maximum bit rate : 37.0 Mb/s Width : 1 920 pixels Height : 1 080 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 23.976 (24000/1001) FPS Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.593 Stream size : 25.2 GiB (66%) Language : English Default : Yes Forced : No And here is the MI of the encoded video: Code: ID : 1 Format : HEVC Format/Info : High Efficiency Video Coding Format profile : Main 10@L4@Main Codec ID : V_MPEGH/ISO/HEVC Duration : 2 h 2 min Bit rate : 3 689 kb/s Width : 1 920 pixels Height : 800 pixels Display aspect ratio : 2.40:1 Frame rate mode : Constant Frame rate : 23.976 (24000/1001) FPS Standard : Component Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 10 bits Bits/(Pixel*Frame) : 0.100 Stream size : 3.15 GiB (95%) Default : Yes Forced : No Color range : Limited The command I'm using for encoding: Code: ffmpeg -hide_banner -i "<input_file>" -map 0:v:0 -map_chapters -1 -map_metadata -1 -vf "crop=1920:800:0:140" -vcodec hevc_nvenc -pix_fmt p010le -preset hq -profile:v main10 -rc constqp -global_quality 21 -rc-lookahead 32 -g 240 -f matroska Video_CQP21_LAF32_GOP240.mkv UPD. Problem solved. It turns out that there is a problem with H.265 encoding done by NVENC on GPUs, based on GP102 core. If you overclock it past a certain point, these artifacts appear after encoding. Decreasing the core clock of the GPU should solve the problem.