[FFmpeg-user] Problem about duration value of converted mp3 file

[Carl Zwanzig]

On 9/1/2020 1:21 AM, myounggun jang wrote:
> The duration of the original wav is 1:09:30, but the length of the
> converted MP3 is 1:07:16.

Are those durations from actually playing the file? It's not uncommon for 
the container's metadata to be wrong and it sounds as if that's what's wrong 
(when different tools show different info, it's usually a metadata problem).

Please verify that the output file actually has 1:09:30 of content.

And what are you trying to accomplish? Just re-encoding the files or 
something else?

z!