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

Jan Ehrhardt phpdev at ehrhardt.nl
Sun Jul 14 01:17:41 CEST 2013

Kieran Kunhya in gmane.comp.video.ffmpeg.devel (Sun, 14 Jul 2013
00:07:02 +0100):
>> There are some situations where you cannot do a dual pass. For instance,
>> if you are live broadcasting a symphony with a grand finale, there is no
>> hardware or software solution possible that produces a fully EBU R128
>> compliant loudness. Something like my patch must be close enough. After
>> all, EBU R128 is only a recommendation.
>EBU R128 specifically does not address any realtime paradigm for the
>simple reason:
>Say you have film credits, the normaliser thinks it's too quiet. The
>next advert is then boosted.

If the next advert is prerecorded, you can apply separate loudness rules
on it.

>R128 refers to programme loudness.

I believe you. But aren't there loudness recommendations for live steams
of popconcerts, the Bayreuther Festspiele or the like?


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