新增弹幕保存

完善FFmpeg转码

src/main/java/com/yutou/bilibili/sqlite/SQLiteManager.java

@@ -30,6 +30,13 @@ public class SQLiteManager {
             e.printStackTrace();
         }
     }
+    public void close(){
+        try {
+            conn.close();
+        } catch (SQLException throwables) {
+            throwables.printStackTrace();
+        }
+    }
 
     public void commit() {
         try {