diff --git a/libavformat/mp3.c b/libavformat/mp3.c
index f99f5206b3..5d6af0f9b6 100644
--- a/libavformat/mp3.c
+++ b/libavformat/mp3.c
@@ -420,6 +420,7 @@ static int mp3_read_probe(AVProbeData *p)
             first_frames= frames;
     }
     if   (first_frames>=3) return AVPROBE_SCORE_MAX/2+1;
+    else if(max_frames>500)return AVPROBE_SCORE_MAX/2;
     else if(max_frames>=3) return AVPROBE_SCORE_MAX/4;
     else if(max_frames>=1) return 1;
     else                   return 0;