https://ffmpeg.org

A complete, cross-platform solution to record, convert and stream audio and video.

Cutting Videos¹⁾ :

• ffmpeg -ss 00:00:15 -i input.mkv -to 00:01:00 -c copy output.mkv
• ffmpeg -i input.mp4 -to 00:00:46 output.mp4

-ss is starting time, -to is duration of cut, -c is codec and copy is input's codec copied to output's.