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

Clément Bœsch u at pkh.me
Mon Dec 22 18:13:06 CET 2014

On Mon, Dec 22, 2014 at 04:50:57PM +0100, Lars Kiesow 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.
> This output can then be used to easily plot a waveform image like this:
>   http://larskiesow.de/waveform.png

You might want to look at ebur128, volumedetect and showwaves filters...


Clément B.
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