ffmpeg -i creature_commandos_s01e06.mkv -c:v libx265 -crf 23 -preset medium -c:a aac -b:a 128k -vf "scale=1920:-2" cc_s01e06_1080p.mp4
If your copy is in HDR10 or Dolby Vision but your screen washes out colors: creature commandos s01e06 ffmpeg
High efficiency. Reduces file size by 50% over H.264. ffmpeg -i creature_commandos_s01e06