From c6a7ca271b9cead3595cef09b8e455ff4b3f198a Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Tue, 24 Nov 2020 14:24:18 +0100
Subject: avfilter/af_biquads: make sure that biquad filter still works

---
 libavfilter/af_biquads.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/af_biquads.c b/libavfilter/af_biquads.c
index 549724ec4e..3ec26d2a9d 100644
--- a/libavfilter/af_biquads.c
+++ b/libavfilter/af_biquads.c
@@ -440,7 +440,7 @@ static int config_filter(AVFilterLink *outlink, int reset)
         return 0;
     }
 
-    if (w0 > M_PI || w0 <= 0.)
+    if ((w0 > M_PI || w0 <= 0.) && (s->filter_type != biquad))
         return AVERROR(EINVAL);
 
     switch (s->width_type) {
-- 
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