Merge commit '567ca142952c5be57e52c149c815dfe5d6ac6d41'

[ffmpeg] / libavfilter / avf_showspectrum.c

diff --git a/libavfilter/avf_showspectrum.c b/libavfilter/avf_showspectrum.c
index 936db605a648a7725070857e3a5bef4c7b60cf2a..7d5c4380c6a31ce0a32156a7f73a33103fd512e3 100644 (file)
--- 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);