ffmpeg -i original.mp4 -vcodec libx264 -crf 24 converted.mp4
ffmpeg -i original.mov -vcodec libx264 -crf 24 converted.mp4
ffmpeg -i original.mp4 -vcodec libvpx -qmin 0 -qmax 50 -crf 10 -b:v 1M converted.webm
ffmpeg -i original.mov -vcodec libvpx -qmin 0 -qmax 50 -crf 10 -b:v 1M converted.webm