diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 2e54ed1f01..6654694102 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -916,7 +916,7 @@ typedef struct AVStream {
     /**
      * Stream information used internally by av_find_stream_info()
      */
-#define MAX_STD_TIMEBASES (30*12+7+6)
+#define MAX_STD_TIMEBASES (30*12+30+3+6)
     struct {
         int64_t last_dts;
         int64_t duration_gcd;
diff --git a/libavformat/utils.c b/libavformat/utils.c
index b116a45c75..bbf67ef49e 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -2802,10 +2802,14 @@ static int get_std_framerate(int i)
         return (i + 1) * 1001;
     i -= 30*12;
 
-    if (i < 7)
-        return ((const int[]) { 40, 48, 50, 60, 80, 120, 240})[i] * 1001 * 12;
+    if (i < 30)
+        return (i + 31) * 1001 * 12;
+    i -= 30;
 
-    i -= 7;
+    if (i < 3)
+        return ((const int[]) { 80, 120, 240})[i] * 1001 * 12;
+
+    i -= 3;
 
     return ((const int[]) { 24, 30, 60, 12, 15, 48 })[i] * 1000 * 12;
 }