ffmpeg

ffmpeg command usage example.

Rotate

Rotate video 90° clockwise:

ffmpeg -i input.mp4 -vf "transpose=1" output.mp4

Rotate video 270° clockwise:

ffmpeg -i input.mp4 -vf "transpose=3" output.mp4

Convert

Convert to 24fps:

ffmpeg -i input.mp4  -filter:v fps=fps=24 output.mp4