ffmpeg FFMPEG 4K/UltraHD Encoding Cheatsheet Crop Real 4K to UltraHD 4096>3840 ffmpeg -i A001_C014_01217G.4k.y4m -vf "crop=3840:2160:128:0" outputgirl.2160p.y4m Resize to 1080p ffmpeg -i outputgirl.2160p.y4m -vf scale=1920:-1 outputgirl.1080p.y4m Resize to 720p ffmpeg -i outputgirl.2160p.y4m -vf