// For bigger size not recommended c:\ffmpeg\bin\ffmpeg.exe -i video1.mp4 -movflags faststart -vcodec libx264 -crf 23 -g 1 -pix_fmt yuv420p output1.mp4 // For smaller size and optimized encoding c:\ffmpeg\bin\ffmpeg.exe -i video1.mp4 -movflags faststart -vcodec libx264 -crf 28 -g 1 output4.mp4
See the Pen Video Background for Scrolltrigger by sinanisler (@sinanisler) on CodePen.