To speed up a video using FFMPEG via the cli:
ffmpeg -i my_video.mp4 -vf "setpts=(PTS-STARTPTS)/3" -crf 18 new_video.mp4
Where 3 is the 3x speed.
To speed up a video using FFMPEG via the cli:
ffmpeg -i my_video.mp4 -vf "setpts=(PTS-STARTPTS)/3" -crf 18 new_video.mp4
Where 3 is the 3x speed.