Backup diff of FFmpeg/usage vs current(No. 2)

• hhttps://nico-lab.net/cutting_ffmpeg/

  ffmpeg -ss [duration] -to [hh:mm:ss] -i input.mp4 -c copy output.mp4

fmpeg -i input.​mov -af anlmdn=0.00001:0.002:0.1:1:1000 -vf eq=contrast=1.6:brightness=0.2,vignette=0.1 output.mp4