[FFmpeg-devel] [PATCH 2/2] lavfi/volume: support volume normalization through metadata.

Nicolas George nicolas.george at normalesup.org
Fri Mar 1 22:19:18 CET 2013

Le primidi 11 ventôse, an CCXXI, Nicolas George a écrit :
> > Do you mean something like "volume=@{metadata_key}" or I'm still in the
> > fog?
> Yes, exactly.

As a side note, this kind of method would also allow "half-normalization":
if you want -23 and you have some parts very loud at -15 and some parts very
quiet at -31, you may want to make the loud parts less loud and the quiet
parts less quiet, but still keep the loud parts louder than the quiet parts;
maybe make them -19 and -27 respectively (halfway). With expression
evaluation, that would just be volume="(-23-@{loudness})/2".


  Nicolas George
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