avfilter/af_bs2b: add missing flag for options

Signed-off-by: Paul B Mahol <onemda@gmail.com>

diff --git a/libavfilter/af_bs2b.c b/libavfilter/af_bs2b.c
index 54d52c5..531a27b 100644 (file)
--- a/libavfilter/af_bs2b.c
+++ b/libavfilter/af_bs2b.c
@@ -45,7 +45,7 @@ typedef struct Bs2bContext {
 } Bs2bContext;
 
 #define OFFSET(x) offsetof(Bs2bContext, x)
-#define A AV_OPT_FLAG_AUDIO_PARAM
+#define A AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
 
 static const AVOption bs2b_options[] = {
     { "profile", "Apply a pre-defined crossfeed level",