[CentOS] Stripping silent periods from MP3s

On Sun, 12 Dec 2010, Scott Robbins wrote:

> To: CentOS mailing list <centos at centos.org>
> From: Scott Robbins <scottro at nyc.rr.com>
> Subject: Re: [CentOS] Stripping silent periods from MP3s
> 
> On Sun, Dec 12, 2010 at 05:48:36PM +0000, Keith Roberts wrote:
>> I'm on Centos 5.5, and would like to use sox to strip out
>> any periods of silence > 5 seconds from a batch mp3 audio
>> files.
>
> ffmpeg can do this.
> Assuming it's the first 5 seconds (as an example), syntax would be
>
> ffmpeg -i longerfile.mp3 -ss 5 -t 300 newfile.mp3
>
> on a 300 second mp3.  In other words, the -ss is the start time and the
> -t is the duration of time you want to keep.  So, that will give you all
> but the first 5 seconds of the file.
>
> You would have to know the duration of each file.
>
>
> You might also want to use the -sameq argument as well, which will keep
> the new file at the same quality as the old one.
>
> ffmpeg -i  longerfile.mp3 -ss 5 -t 300 -sameq newfile.mp3

Hi Scott.

Thanks for the reply.

I need to remove (or shorten to 5 seconds) any silent 
sections throughout the Mp3 file - not just the beginning or 
the end.

So all I end up with in the output file is the original, 
with those silent periods truncated down to ~ 5 secs.

Keith

-- 
In theory, theory and practice are the same;
in practice they are not.

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