From: Sebastian Dröge <sebast...@centricular.com>
s->target_i and global are in dB but s->target_tp and true_peak are
linear. Instead of mixing these in the calculations, convert the former
first to have all following calculations in the same unit.
---
libavfilter/af_loudnorm.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/libavfilter/af_loudnorm.c b/libavfilter/af_loudnorm.c
index 314b25fa39..8e3cdc36db 100644
--- a/libavfilter/af_loudnorm.c
+++ b/libavfilter/af_loudnorm.c
@@ -453,10 +453,9 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
true_peak = tmp;
}
- offset = s->target_i - global;
- offset_tp = true_peak + offset;
+ offset = pow(10., (s->target_i - global) / 20.);
+ offset_tp = true_peak * offset;
s->offset = offset_tp < s->target_tp ? offset : s->target_tp -
true_peak;
- s->offset = pow(10., s->offset / 20.);
s->frame_type = LINEAR_MODE;
}
--
2.26.2
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