diff --git a/src/Common/MediaSink.cpp b/src/Common/MediaSink.cpp
index b9d3be98..542131bf 100644
--- a/src/Common/MediaSink.cpp
+++ b/src/Common/MediaSink.cpp
@@ -25,6 +25,8 @@
  */
 #include "MediaSink.h"
 
+//最多等待未初始化的Track 10秒，超时之后会忽略未初始化的Track
+#define MAX_WAIT_MS 10000
 
 namespace mediakit{
 
@@ -53,6 +55,7 @@ void MediaSink::addTrack(const Track::Ptr &track_in) {
     }else{
         _allTrackReady = false;
         _trackReadyCallback[codec_id] = lam;
+        _ticker.resetTime();
     }
 }
 
@@ -64,8 +67,9 @@ void MediaSink::inputFrame(const Frame::Ptr &frame) {
         return;
     }
     it->second->inputFrame(frame);
+
     if(!_allTrackReady && !_trackReadyCallback.empty() && it->second->ready()){
-        //Track由未就绪状态装换成就绪状态，我们就生成sdp以及rtp编码器
+        //Track由未就绪状态装换成就绪状态，我们就触发onTrackReady回调
         auto it_callback = _trackReadyCallback.find(codec_id);
         if(it_callback != _trackReadyCallback.end()){
             it_callback->second();
@@ -73,9 +77,26 @@ void MediaSink::inputFrame(const Frame::Ptr &frame) {
         }
     }
 
-    if(!_allTrackReady && _trackReadyCallback.empty()){
+    if(!_allTrackReady && (_trackReadyCallback.empty() || _ticker.elapsedTime() > MAX_WAIT_MS)){
         _allTrackReady = true;
-        onAllTrackReady();
+
+        if(!_trackReadyCallback.empty()){
+            //这是超时强制忽略未准备好的Track
+            _trackReadyCallback.clear();
+            //移除未准备好的Track
+            for(auto it = _track_map.begin() ; it != _track_map.end() ; ){
+                if(!it->second->ready()){
+                    it = _track_map.erase(it);
+                    continue;
+                }
+                ++it;
+            }
+        }
+
+        if(!_track_map.empty()){
+            //最少有一个有效的Track
+            onAllTrackReady();
+        }
     }
 }
 
@@ -83,11 +104,14 @@ bool MediaSink::isAllTrackReady() const {
     return _allTrackReady;
 }
 
-Track::Ptr MediaSink::getTrack(TrackType type) const {
+Track::Ptr MediaSink::getTrack(TrackType type,bool trackReady) const {
     lock_guard<recursive_mutex> lck(_mtx);
     for (auto &pr : _track_map){
         if(pr.second->getTrackType() == type){
-            return pr.second;
+            if(!trackReady){
+                return pr.second;
+            }
+            return pr.second->ready() ? pr.second : nullptr;
         }
     }
     return nullptr;
diff --git a/src/Common/MediaSink.h b/src/Common/MediaSink.h
index 0963f73d..44712096 100644
--- a/src/Common/MediaSink.h
+++ b/src/Common/MediaSink.h
@@ -29,6 +29,7 @@
 
 #include <mutex>
 #include <memory>
+#include "Util/TimeTicker.h"
 #include "Extension/Frame.h"
 #include "Extension/Track.h"
 
@@ -70,10 +71,11 @@ public:
 
     /**
      * 获取特定类型的Track
-     * @param type
+     * @param type track类型
+	 * @param trackReady 是否获取已经准备好的Track
      * @return
      */
-    Track::Ptr getTrack(TrackType type) const ;
+    Track::Ptr getTrack(TrackType type,bool trackReady = true) const ;
 protected:
     /**
      * 某track已经准备好，其ready()状态返回true，
@@ -97,6 +99,7 @@ private:
     map<int,Track::Ptr> _track_map;
     map<int,function<void()> > _trackReadyCallback;
     bool _allTrackReady = false;
+    Ticker _ticker;
 };