[FFmpeg-user] using loudnorm only for true-peak limiting ?
cus at passwd.hu
Wed Sep 19 12:00:57 EEST 2018
On Fri, 14 Sep 2018, Frédéric Busnel-Joncour wrote:
> Hi there,
> I sometimes need to adjust true-peak of audio files, only for small
> corrections (from -0.7 to -1.0 for example), and leave everything else
> unchanged. As there's no dedicated true-peak limiter in ffmpeg audio
> filters (if I'm not wrong), I tried with loudnorm filter, but even when
> entering same input and output Integrated and LRA values, there's some
> corrections that are made. Is there any way to tell loudnorm to just
> adjust true-peak and leave anything else unchanged ?
For this, do not use loudnorm, just resample the audio to 4*sample_rate,
apply a traditional limiter (e.g. alimiter filter) and then downsample it.
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