20210614 A video can be rotated clockwise or counter
clockwise easily with ffmpeg. Here, the input video
is identified using
-i. Video filtering is introduced with
a shorthand for
-filter:v. A transpose=1 will rotate the video
clockwise. The audio is kept as it is with
-c:a. The video is copied
to the output video file.
$ ffmpeg -i input.mp4 -vf transpose=1 -c:a copy OUTPUT.mp4
A counterclockwise rotation is achieved by a transpose=2 filter.
$ ffmpeg -i input.mp4 -vf vflip -c:a copy OUTPUT.mp4
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