refine the hls m3u8 refresh interval.

@@ -3,7 +3,7 @@
 //////////////////////////////////////////////////////////////////////////////////
 
 // to query the swf anti cache.
-function srs_get_version_code() { return "1.30"; }
+function srs_get_version_code() { return "1.31"; }
 
 /**
 * player specified size.

@@ -31,7 +31,7 @@ package
     public class Player
     {
 		// refresh every ts_fragment_seconds*M3u8RefreshRatio
-		public static var M3u8RefreshRatio:Number = 0.45;
+		public static var M3u8RefreshRatio:Number = 0.3;
 		
 		// parse ts every this ms.
 		public static var TsParseAsyncInterval:Number = 80;