ffmpeg: transform

#ffmpeg #shell

動画を90度回転する

sh

ffmpeg -i in.mp4 -vf "transpose=1" out.mp4

> 0 = 90° counterclockwise and vertical flip (default)

> 1 = 90° clockwise

> 2 = 90° counterclockwise

> 3 = 90° clockwise and vertical flip

-vf "transpose=2,transpose=2" とすれば180度回転が可能

Ref: https://stackoverflow.com/questions/3937387/rotating-videos-with-ffmpeg