diff --git a/filters/f_lavfi.c b/filters/f_lavfi.c
index afc9f2d445..982e7ea6fa 100644
--- a/filters/f_lavfi.c
+++ b/filters/f_lavfi.c
@@ -987,6 +987,8 @@ static bool is_usable(const AVFilter *filter, int media_type)
     int nb_inputs  = avfilter_pad_count(filter->inputs),
         nb_outputs = avfilter_pad_count(filter->outputs);
 #endif
+    if (nb_inputs > 1 || nb_outputs > 1)
+        return false;
     bool input_ok = filter->flags & AVFILTER_FLAG_DYNAMIC_INPUTS;
     bool output_ok = filter->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS;
     if (nb_inputs == 1)