Ffmpeg和CUDA硬轉碼實現帶bt2020顏色空間裁剪成2x2的小視頻：
ffmpeg -y -c:v hevc_cuvid -i D:\8Kvideos\模特.mp4 -b:v 40M -c:v hevc_nvenc -preset fast -vf crop=iw/2:ih/2:0:0 -profile:v main10 -pix_fmt p010 -color_primaries bt2020 -colorspace bt2020_ncl -color_trc arib-std-b67 1.mp4
ffmpeg -y -c:v hevc_cuvid -i D:\8Kvideos\模特.mp4 -b:v 40M -c:v hevc_nvenc -preset fast -vf crop=iw/2:ih/2:iw/2:0 -profile:v main10 -pix_fmt p010 -color_primaries bt2020 -colorspace bt2020_ncl -color_trc arib-std-b67 2.mp4
ffmpeg -y -c:v hevc_cuvid -i D:\8Kvideos\模特.mp4 -b:v 40M -c:v hevc_nvenc -preset fast -vf crop=iw/2:ih/2:0:ih/2 -profile:v main10 -pix_fmt p010 -color_primaries bt2020 -colorspace bt2020_ncl -color_trc arib-std-b67 3.mp4
ffmpeg -y -c:v hevc_cuvid -i D:\8Kvideos\模特.mp4 -b:v 40M -c:v hevc_nvenc -preset fast -vf crop=iw/2:ih/2:iw/2:ih/2 -profile:v main10 -pix_fmt p010 -color_primaries bt2020 -colorspace bt2020_ncl -color_trc arib-std-b67 4.mp4