[FFmpeg-user] Get exact duration of an mpeg1 file

Carl Zwanzig cpz at tuunq.com
Thu Dec 13 19:18:27 EET 2018

On 12/13/2018 9:07 AM, Robert Kr├╝ger wrote:
> Sorry, I have to take that back as I used the wrong file and got something
> mixed up when looking at it. -probesize doesn't change the behaviour at
> all. I set it to a value larger than the file and still got the warning and
> the incorrect number. So for mpeg1 this does not seem to work and seems to
> be consistent with my last test a long time ago.

Happens :).

You could simply "play" the file into null output and catch the frame count 
at the end ("ffmpeg -i <file> -f null -"). May have to play with other 
options to get readily-parsible text.


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