MP4Box
MP4Box -info original.mp4
MP4Box -out output.mp4 -splitx <start secs>:<end secs> original.mp4
ex) MP4Box -out output.mp4 -splitx 77:137 original.mp4
mkvtoolnix
mkvinfo original.mkv
mkvmerge -o output.mkv --split parts:<start time>-<end time> original.mkv
ex) mkvmerge -o output.mkv --split parts:1:17-2:17 original.mkv
합치기
MP4Box
MP4Box -cat input1.mp4 -cat input2.mp4 ouput.mp4
비디오, 오디오 합치기
MP4Box
MP4Box -add video.mp4 -add audio.m4a ouput.mp4
자막 합치기
MP4Box -add 자막.srt:hdlr=sbtl:lang=kor input.mp4 -out output.mp4
https://gist.github.com/wmanth/d08fb9fcc87dcf84ee5fd4a1d8b9d91c