unity3D不借助外部工具导出OGV视频格式

using UnityEngine;
using UnityEditor;
using System.Collections;

public class ExportOgv 
{
      [MenuItem("Assets/ExportOgg")]
      static void Execute()
     {
           Object video = Selection.activeObject;

           EditorUtility.ExtractOggFile(video, "Assets/StreamingAssets/" + video.name + ".ogv");

           AssetDatabase.Refresh();
      
}
}