From 50b3cd22dd70658b39abd0ced31b495d4d0a4b1b Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Sat, 6 Jan 2018 14:58:00 +0100
Subject: [PATCH] avfilter/av_biquads: scale a0 too

Fixes bug when using commands to alter coefficients.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
---
 libavfilter/af_biquads.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavfilter/af_biquads.c b/libavfilter/af_biquads.c
index 6e60e3b1b7..d5c3823e64 100644
--- a/libavfilter/af_biquads.c
+++ b/libavfilter/af_biquads.c
@@ -382,6 +382,7 @@ static int config_filter(AVFilterLink *outlink, int reset)
     s->b0 /= s->a0;
     s->b1 /= s->a0;
     s->b2 /= s->a0;
+    s->a0 /= s->a0;
 
     s->cache = av_realloc_f(s->cache, sizeof(ChanCache), inlink->channels);
     if (!s->cache)