[FFmpeg-devel] [PATCH] libavfilter/af_showvolume: A Simple Audio Filter for Extracting Volume Information

Lars Kiesow lkiesow at uos.de
Mon Dec 22 18:19:57 CET 2014

Hi Timothy,
volumedetect will give you statistics about the overall volume of the
audio stream like mean value, maxumim value, ... That's interesting for
tasks like audio normalization but does not help if you want to have
information about volumes at given points. For example, I don't think
you could use volumedetect for generating waveform images.

On Mon, 22 Dec 2014 17:08:01 +0000
Timothy Gu <timothygu99 at gmail.com> wrote:

> On Mon Dec 22 2014 at 7:51:10 AM Lars Kiesow <lkiesow at uos.de> wrote:
> > Hi everyone,
> > I'm an FFmpeg user for quite a while now and though I might as well
> > switch to dev at some point...
> >
> > Please find attached to this mail a simple audio filter which makes
> > it possible to extract and print volume information from audio
> > streams. It works more or less like the showinfo filters only that
> > it returns the pcm value information for each audio sample.
> >
> https://ffmpeg.org/ffmpeg-filters.html#volumedetect ?
> Timothy
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