Get length of a video using regex and ffmpeg

Question

From the following ffmpeg -i output, how would I get the length (00:35)--

$ ffmpeg -i 1video.mp4

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from \'/Users/d         


        

Answer 1

Format (container) duration:

$ ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 input.mp4
30.024000

Adding the -sexagesimal option will use the HOURS:MM:SS.MICROSECONDS time unit format:

0:00:30.024000

Duration of the first video stream:

$ ffprobe -v error -select_streams v:0 -show_entries stream=duration -of default=noprint_wrappers=1:nokey=1 input.mp4
30.000000

https://trac.ffmpeg.org/wiki/FFprobeTips#Duration