avfilter/avf_showspectrum: finally fix log scaler

Signed-off-by: Paul B Mahol <onemda@gmail.com>
2016-01-03 22:43:21 +01:00 · 2016-01-03 22:43:21 +01:00 · 0a451082c7
parent 14caf9667e
commit 0a451082c7
1 changed files with 1 additions and 1 deletions
--- a/libavfilter/avf_showspectrum.c
+++ b/libavfilter/avf_showspectrum.c
@ -581,7 +581,7 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
                a = pow(a, 0.20);
                break;
            case LOG:
-                a = 1 + log10(FFMAX(FFMIN(1, a), 1e-6)) / 5; // zero = -120dBFS
+                a = 1 + log10(FFMAX(FFMIN(1, a * w), 1e-6)) / 6; // zero = -120dBFS
                break;
            default:
                av_assert0(0);