[FFmpeg-user] sound volume normalisation

[Lou]

On Wed, 26 Jun 2013 01:58:43 +0200
"Bouke \(VideoToolShed\)" <bouke at videotoolshed.com> wrote:

> ----- Original Message ----- 
> From: "Moritz Barsnick" <barsnick at gmx.net>
> To: "FFmpeg user discussions" <ffmpeg-user at ffmpeg.org>
> Sent: Wednesday, June 26, 2013 12:18 AM
> Subject: Re: [FFmpeg-user] sound volume normalisation
> 
> 
> > On Tue, Jun 25, 2013 at 19:56:23 +0200, jacky wrote:
> >>  1.   demux video , demux audio
> >>  2.   run lame to find out the sound level
> >
> > Have you seen ffmpeg's volumedetect filter?
> > http://www.ffmpeg.org/ffmpeg-filters.html#volumedetect
> >
> > The example says it all.
> 
> Moritz,
> Not to sound more arrogant than i actually am, I can't praise the Lords of 
> R128 Loudness enough.
> This  volumedetect is a nice function eg to plot waveforms, (and i did not 
> know about it, so thanks!)

Also see tools/normalize.py

(I haven't actually investigated or tried it yet though).