drop script data except the onMetaData packet.

@@ -275,6 +275,13 @@ int main(int argc, char** argv)
         // we only write some types of messages to flv file.
         int is_flv_msg = type == SRS_RTMP_TYPE_AUDIO
             || type == SRS_RTMP_TYPE_VIDEO || type == SRS_RTMP_TYPE_SCRIPT;
+            
+        // for script data, ignore except onMetaData
+        if (type == SRS_RTMP_TYPE_SCRIPT) {
+            if (!srs_rtmp_is_onMetaData(type, data, size)) {
+                is_flv_msg = 0;
+            }
+        }
 
         if (flv) {
             if (is_flv_msg) {

@@ -1064,6 +1064,31 @@ int srs_rtmp_write_packet(srs_rtmp_t rtmp, char type, u_int32_t timestamp, char*
     return ret;
 }
 
+srs_bool srs_rtmp_is_onMetaData(char type, char* data, int size)
+{
+    int ret = ERROR_SUCCESS;
+    
+    if (type != SRS_RTMP_TYPE_SCRIPT) {
+        return false;
+    }
+    
+    SrsStream stream;
+    if ((ret = stream.initialize(data, size)) != ERROR_SUCCESS) {
+        return false;
+    }
+    
+    std::string name;
+    if ((ret = srs_amf0_read_string(&stream, name)) != ERROR_SUCCESS) {
+        return false;
+    }
+    
+    if (name != "onMetaData") {
+        return false;
+    }
+    
+    return true;
+}
+
 /**
 * directly write a audio frame.
 */

@@ -264,6 +264,11 @@ extern int srs_rtmp_write_packet(srs_rtmp_t rtmp,
     char type, u_int32_t timestamp, char* data, int size
 );
 
+/**
+* whether type is script data and the data is onMetaData.
+*/
+extern srs_bool srs_rtmp_is_onMetaData(char type, char* data, int size);
+
 /*************************************************************
 **************************************************************
 * audio raw codec