Get Video Duration in Seconds Using FFmpeg / FFprobe
We'll get the value back in seconds as well as HH:MM:SS if you prefer.
We’ll be using ffprobe but that’s a tool that gets installed by default with
ffmpeg. You can apt / brew / etc. install ffmpeg if you need to install it.
We can do it based off the container format or stream duration of the video:
# Container format:
$ ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 myvideo.mp4
453.903678
# Stream format:
$ ffprobe -v error -select_streams v:0 -show_entries stream=duration -of default=noprint_wrappers=1:nokey=1 myvideo.mp4
453.866667
With quite a few videos I’ve noticed if you round each one to the nearest
second they both produce the same result. You can round it up by piping the
command into | xargs printf "%.0f\n". You can change the 0 to 1, 2 or
whatever precision you want.
You may also want to use LC_ALL=C xargs /usr/bin/printf instead of printf
to avoid edge cases between shells and language settings. There’s a nice write
up about that here, but if you’re
running this as a 1 off script with an English locale then printf should
suffice.
I didn’t formally benchmark it but both appear to finish in about the same time
if you run them with time. I tried it on a video that was over 3 hours long
and both commands finished between 220-240ms on my workstation with an old i5
quad core 3.2ghz CPU.
If you want more details about the output you can remove the -v error flag
which is the log level. It defaults to -v info if you omit it. You can find
more details in the docs.
We can also get the HH:MM:SS.MICROSECONDS format with the -sexagesimal flag if you prefer:
# Container format:
$ ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 -sexagesimal myvideo.mp4
0:07:33.903678
# Stream format:
$ ffprobe -v error -select_streams v:0 -show_entries stream=duration -of default=noprint_wrappers=1:nokey=1 -sexagesimal 2022-10-26,21-09.mp4
0:07:33.866667
That could be handy depending on what you’re doing. A while back I made a
video to do the above but I used a combo of ffmpeg and grep because I didn’t
know about the above command.
As for a real world use case. I ended up getting the video duration in seconds for 200+ videos for one of my video courses to help seed my local database with realistic values for the course platform I’m building.
# Demo Video
Timestamps
- 0:31 – Getting the duration in seconds in 2 different ways
- 1:47 – Real world use case
- 2:16 – They both run at about the same speed
- 2:59 – The v flag lets us see more information (log level)
- 3:42 – Getting the value in HH:MM:SS format
- 4:13 – Rounding up the seconds with xargs and printf
- 5:17 – Handling edge cases with your locale and printf
What use case will you be using this for? Let me know below.