[Libav-user] loudnorm filter and EBU R128 standard

Jiming Shi jmshi.astro at gmail.com
Wed Feb 5 23:27:54 EET 2020

Recently I'm looking into ways of doing audio loudness normalization and
came across ffmpeg filter `loudnorm` .

According to EBU R128 standard:  "measurement shall include a gating method
as specified in ITU-R BS.1770" which requires a momentary measurement which
is 400ms instead of the shortterm one (3sec) used in the loudnorm filter:

Did I miss  something here? And is there a way to make the change in ffmpeg?

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