[FFmpeg-user] Converting mp4 to mp3 has the mp3 longer than the mp4

[DoubleFelix]

 Hello,
I was trying to rip the audio from an mp4 file and then cut the mp3 file
down, when I noticed something.

The source video is 24m 50s in length, but when using "ffmpeg -i video.mp4
audio.mp3", the resulting audio file is 25m 28s in length, confirmed in
both metadata and the Groove music player.

Any idea what's going on?

Thanks,
Felix