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From: Martin Ratinaud <martinratinaud@gmail.com>
To: "Måns Rullgård" <mans@mansr.com>
Cc: sox-users@lists.sourceforge.net
Subject: Re: Wav to Mp3 leads to an mp3 file that has a longer duration
Date: Tue, 17 Dec 2019 14:04:04 +0400	[thread overview]
Message-ID: <CAKy7tYjJZEOjRtaNXCC+DctuBK+cKwBJy1RLjWpDbCo0sPdFQw@mail.gmail.com> (raw)
In-Reply-To: <yw1ximmgw4fh.fsf@mansr.com>


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Thanks for the tip!

What codec should I use then ?

Thanks
-----------------------------------------------------------------------
*Martin RATINAUD*
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On Mon, Dec 16, 2019 at 9:44 PM Måns Rullgård <mans@mansr.com> wrote:

> Martin Ratinaud <martinratinaud@gmail.com> writes:
>
> > Ok, thanks.
> >
> > But would it be possible to
> > - add silence samples at the end of the wav file so that is is a multiple
> > of 1152
> > - convert it to an mp3
> > - and get the exact same number of samples with no change between wav
> > duration and mp3 duration
> >
> > Because I just test with a wav file that is 8640000 samples = 7500 * 1152
> > and when I convert it to an mp3, I get 8641152 samples
>
> Apparently the LAME encoder is adding an extra frame for some reason.
> MP3 is weird like this.  If you need the number of samples to be exact,
> you'll have to switch a more modern codec.
>
> --
> Måns Rullgård
>

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  reply	other threads:[~2019-12-17 10:04 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-11 14:26 Wav to Mp3 leads to an mp3 file that has a longer duration Martin Ratinaud
2019-12-11 17:18 ` Jeremy Nicoll - ml sox users
2019-12-12  4:18   ` Martin Ratinaud
2019-12-12 17:05     ` Jeremy Nicoll - ml sox users
2019-12-16  5:10       ` Martin Ratinaud
2019-12-16 11:48 ` Måns Rullgård
2019-12-16 12:02   ` Martin Ratinaud
2019-12-16 13:30     ` Måns Rullgård
2019-12-16 13:36       ` Martin Ratinaud
2019-12-16 17:44         ` Måns Rullgård
2019-12-17 10:04           ` Martin Ratinaud [this message]
2019-12-17 10:50             ` Måns Rullgård
2019-12-18  4:00               ` Martin Ratinaud
2019-12-18  7:43                 ` Mikko Olkkonen
2019-12-18  9:06                   ` Martin Ratinaud
2019-12-19  9:52                     ` Mikko Olkkonen

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