[FFmpeg-devel] One pass volume normalization (ebur128)

Kieran Kunhya kierank at obe.tv
Sun Jul 14 20:49:56 CEST 2013

On Sun, Jul 14, 2013 at 7:45 PM, Jan Ehrhardt <phpdev at ehrhardt.nl> wrote:
> Kieran Kunhya in gmane.comp.video.ffmpeg.devel (Sun, 14 Jul 2013
> 18:05:28 +0100):
>>> But am I remembering it correctly that you were the one that once on
>>> #ffmpeg-devel uttered the wish to do normalization on the fly? Did you
>>> change your mind?
>>Yes, having read the spec in more detailed and spoken to people who
>>helped create R128.
>>I don't think it's a good idea to have realtime normalisation and call it R128.
> Of course, we could make a duplicate of f_ebur128.c, remove every
> reference to R128 and use that for the injection of volume stats into
> the metadata. But it seems silly to duplicate a feature that is already
> in FFMpeg.
> For my kind of normalisation, two things are needed: volume injection in
> the metadata and use of those metadata for volume adjustment. How do we
> get rid of the R128 label without duplicating features?

I don't see what's wrong with having an out of spec option as long as
it's clear it's not actually R128.

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