This is likely more precise and conveys the intent better.
Signed-off-by: Ganesh Ajjanagadde <[email protected]>
---
libavfilter/avf_showspectrum.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavfilter/avf_showspectrum.c b/libavfilter/avf_showspectrum.c
index 936db60..7d5c438 100644
--- a/libavfilter/avf_showspectrum.c
+++ b/libavfilter/avf_showspectrum.c
@@ -386,7 +386,7 @@ static int plot_spectrum_column(AVFilterLink *inlink,
AVFrame *insamples)
a = cbrt(a);
break;
case LOG:
- a = 1 - log(FFMAX(FFMIN(1, a), 1e-6)) / log(1e-6); // zero =
-120dBFS
+ a = 1 + log10(FFMAX(FFMIN(1, a), 1e-6)) / 6; // zero = -120dBFS
break;
default:
av_assert0(0);
--
2.6.2
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