diff --git a/src/Extension/Frame.cpp b/src/Extension/Frame.cpp
index b97a840e..dda876ca 100644
--- a/src/Extension/Frame.cpp
+++ b/src/Extension/Frame.cpp
@@ -210,5 +210,39 @@ void FrameMerger::flush() {
     }
     clear();
 }
+/**
+ * 写帧接口转function，辅助类
+ */
+class FrameWriterInterfaceHelper : public FrameWriterInterface {
+public:
+    typedef std::shared_ptr<FrameWriterInterfaceHelper> Ptr;
+    typedef std::function<bool(const Frame::Ptr &frame)> onWriteFrame;
+
+    /**
+     * inputFrame后触发onWriteFrame回调
+     */
+    FrameWriterInterfaceHelper(const onWriteFrame& cb){
+        _writeCallback = cb;
+    }
+
+    virtual ~FrameWriterInterfaceHelper(){}
+
+    /**
+     * 写入帧数据
+     */
+    bool inputFrame(const Frame::Ptr &frame) override {
+        return _writeCallback(frame);
+    }
+
+private:
+    onWriteFrame _writeCallback;
+};
+
+FrameWriterInterface* FrameDispatcher::addDelegate(const std::function<bool(const Frame::Ptr &frame)> &cb) {
+    auto delegate = std::make_shared<FrameWriterInterfaceHelper>(cb);
+    std::lock_guard<std::mutex> lck(_mtx);
+    _delegates.emplace(delegate.get(), delegate);
+    return delegate.get();
+}
 
 }//namespace mediakit
diff --git a/src/Extension/Frame.h b/src/Extension/Frame.h
index 10a046a8..aa096681 100644
--- a/src/Extension/Frame.h
+++ b/src/Extension/Frame.h
@@ -278,29 +278,6 @@ public:
     virtual void flush() {};
 };
 
-/**
- * 写帧接口转function，辅助类
- */
-class FrameWriterInterfaceHelper : public FrameWriterInterface {
-public:
-    typedef std::shared_ptr<FrameWriterInterfaceHelper> Ptr;
-    typedef std::function<bool(const Frame::Ptr &frame)> onWriteFrame;
-
-    /**
-     * inputFrame后触发onWriteFrame回调
-     */
-    FrameWriterInterfaceHelper(const onWriteFrame &cb) { _writeCallback = cb; }
-    virtual ~FrameWriterInterfaceHelper() = default;
-
-    /**
-     * 写入帧数据
-     */
-    bool inputFrame(const Frame::Ptr &frame) override { return _writeCallback(frame); }
-
-private:
-    onWriteFrame _writeCallback;
-};
-
 /**
  * 支持代理转发的帧环形缓存
  */
@@ -318,12 +295,7 @@ public:
         _delegates.emplace(delegate.get(), delegate);
     }
 
-    FrameWriterInterface* addDelegate(const std::function<bool(const Frame::Ptr &frame)> &cb) {
-        auto delegate = std::make_shared<FrameWriterInterfaceHelper>(cb);
-        std::lock_guard<std::mutex> lck(_mtx);
-        _delegates.emplace(delegate.get(), delegate);
-        return delegate.get();
-    }
+    FrameWriterInterface* addDelegate(const std::function<bool(const Frame::Ptr &frame)> &cb);
     /**
      * 删除代理
      */