[ffmpeg]剪輯影片- Cutting video

<code>ffmpeg -i in.mp4 -ss [start] -t [duration] -c:v copy -c:a copy out.mp4

time format
start: 00:00:00.000
duration: 00:00:00.000

reference:http://superuser.com/questions/377343/cut-part-from-video-file-from-start-position-to-end-position-with-ffmpeg
</code>