diff --git a/src/Common/MediaSource.cpp b/src/Common/MediaSource.cpp
index d548a7d1..1c14508a 100644
--- a/src/Common/MediaSource.cpp
+++ b/src/Common/MediaSource.cpp
@@ -646,7 +646,7 @@ bool MediaSourceEventInterceptor::stopSendRtp(MediaSource &sender){
 
 /////////////////////////////////////FlushPolicy//////////////////////////////////////
 
-static bool isFlushAble_default(bool is_video, uint32_t last_stamp, uint32_t new_stamp, int cache_size) {
+static bool isFlushAble_default(bool is_video, uint64_t last_stamp, uint64_t new_stamp, int cache_size) {
     if (new_stamp + 500 < last_stamp) {
         //时间戳回退比较大(可能seek中)，由于rtp中时间戳是pts，是可能存在一定程度的回退的
         return true;
@@ -656,7 +656,7 @@ static bool isFlushAble_default(bool is_video, uint32_t last_stamp, uint32_t new
     return last_stamp != new_stamp || cache_size >= 1024;
 }
 
-static bool isFlushAble_merge(bool is_video, uint32_t last_stamp, uint32_t new_stamp, int cache_size, int merge_ms) {
+static bool isFlushAble_merge(bool is_video, uint64_t last_stamp, uint64_t new_stamp, int cache_size, int merge_ms) {
     if (new_stamp + 500 < last_stamp) {
         //时间戳回退比较大(可能seek中)，由于rtp中时间戳是pts，是可能存在一定程度的回退的
         return true;
@@ -672,7 +672,7 @@ static bool isFlushAble_merge(bool is_video, uint32_t last_stamp, uint32_t new_s
     return cache_size >= 1024;
 }
 
-bool FlushPolicy::isFlushAble(bool is_video, bool is_key, uint32_t new_stamp, int cache_size) {
+bool FlushPolicy::isFlushAble(bool is_video, bool is_key, uint64_t new_stamp, int cache_size) {
     bool flush_flag = false;
     if (is_key && is_video) {
         //遇到关键帧flush掉前面的数据，确保关键帧为该组数据的第一帧，确保GOP缓存有效
diff --git a/src/Common/MediaSource.h b/src/Common/MediaSource.h
index 44f8d3be..ed7d23e6 100644
--- a/src/Common/MediaSource.h
+++ b/src/Common/MediaSource.h
@@ -301,18 +301,10 @@ public:
     FlushPolicy() = default;
     ~FlushPolicy() = default;
 
-    uint32_t getStamp(const RtpPacket::Ptr &packet) {
-        return packet->timeStamp;
-    }
-
-    uint32_t getStamp(const RtmpPacket::Ptr &packet) {
-        return packet->time_stamp;
-    }
-
-    bool isFlushAble(bool is_video, bool is_key, uint32_t new_stamp, int cache_size);
+    bool isFlushAble(bool is_video, bool is_key, uint64_t new_stamp, int cache_size);
 
 private:
-    uint32_t _last_stamp[2] = {0, 0};
+    uint64_t _last_stamp[2] = {0, 0};
 };
 
 /// 合并写缓存模板
@@ -328,8 +320,8 @@ public:
 
     virtual ~PacketCache() = default;
 
-    void inputPacket(bool is_video, std::shared_ptr<packet> pkt, bool key_pos) {
-        if (_policy.isFlushAble(is_video, key_pos, _policy.getStamp(pkt), _cache->size())) {
+    void inputPacket(uint64_t stamp, bool is_video, std::shared_ptr<packet> pkt, bool key_pos) {
+        if (_policy.isFlushAble(is_video, key_pos, stamp, _cache->size())) {
             flushAll();
         }
 
diff --git a/src/FMP4/FMP4MediaSource.h b/src/FMP4/FMP4MediaSource.h
index 23b58fee..ef4af868 100644
--- a/src/FMP4/FMP4MediaSource.h
+++ b/src/FMP4/FMP4MediaSource.h
@@ -30,19 +30,8 @@ public:
     uint32_t time_stamp = 0;
 };
 
-//FMP4直播合并写策略类
-class FMP4FlushPolicy : public FlushPolicy{
-public:
-    FMP4FlushPolicy() = default;
-    ~FMP4FlushPolicy() = default;
-
-    uint32_t getStamp(const FMP4Packet::Ptr &packet) {
-        return packet->time_stamp;
-    }
-};
-
 //FMP4直播源
-class FMP4MediaSource : public MediaSource, public RingDelegate<FMP4Packet::Ptr>, public PacketCache<FMP4Packet, FMP4FlushPolicy>{
+class FMP4MediaSource : public MediaSource, public RingDelegate<FMP4Packet::Ptr>, public PacketCache<FMP4Packet>{
 public:
     using Ptr = std::shared_ptr<FMP4MediaSource>;
     using RingDataType = std::shared_ptr<List<FMP4Packet::Ptr> >;
@@ -100,14 +89,15 @@ public:
             _have_video = true;
         }
         _speed += packet->size();
-        PacketCache<FMP4Packet, FMP4FlushPolicy>::inputPacket(true, std::move(packet), key);
+        auto stamp = packet->time_stamp;
+        PacketCache<FMP4Packet>::inputPacket(stamp, true, std::move(packet), key);
     }
 
     /**
      * 情况GOP缓存
      */
     void clearCache() override {
-        PacketCache<FMP4Packet, FMP4FlushPolicy>::clearCache();
+        PacketCache<FMP4Packet>::clearCache();
         _ring->clearCache();
     }
 
diff --git a/src/Rtmp/RtmpMediaSource.h b/src/Rtmp/RtmpMediaSource.h
index b538c003..8d309654 100644
--- a/src/Rtmp/RtmpMediaSource.h
+++ b/src/Rtmp/RtmpMediaSource.h
@@ -154,7 +154,8 @@ public:
         }
         bool key = pkt->isVideoKeyFrame();
         bool is_video = pkt->type_id == MSG_VIDEO;
-        PacketCache<RtmpPacket>::inputPacket(is_video, std::move(pkt), key);
+        auto stamp  = pkt->time_stamp;
+        PacketCache<RtmpPacket>::inputPacket(stamp, is_video, std::move(pkt), key);
     }
 
     /**
diff --git a/src/Rtsp/RtspMediaSource.h b/src/Rtsp/RtspMediaSource.h
index cafeaf33..869eae73 100644
--- a/src/Rtsp/RtspMediaSource.h
+++ b/src/Rtsp/RtspMediaSource.h
@@ -183,7 +183,8 @@ public:
             }
         }
         bool is_video = rtp->type == TrackVideo;
-        PacketCache<RtpPacket>::inputPacket(is_video, std::move(rtp), keyPos);
+        auto stamp = rtp->timeStamp;
+        PacketCache<RtpPacket>::inputPacket(stamp, is_video, std::move(rtp), keyPos);
     }
 
     void clearCache() override{
diff --git a/src/Rtsp/RtspSession.h b/src/Rtsp/RtspSession.h
index f681e874..cd691c7b 100644
--- a/src/Rtsp/RtspSession.h
+++ b/src/Rtsp/RtspSession.h
@@ -37,17 +37,19 @@ class RtspSession;
 class BufferRtp : public Buffer{
 public:
     typedef std::shared_ptr<BufferRtp> Ptr;
-    BufferRtp(const RtpPacket::Ptr & pkt,uint32_t offset = 0 ):_rtp(pkt),_offset(offset){}
-    virtual ~BufferRtp(){}
+    BufferRtp(Buffer::Ptr pkt, uint32_t offset = 0) : _rtp(std::move(pkt)), _offset(offset) {}
+    ~BufferRtp() override{}
 
     char *data() const override {
         return (char *)_rtp->data() + _offset;
     }
+
     uint32_t size() const override {
         return _rtp->size() - _offset;
     }
+
 private:
-    RtpPacket::Ptr _rtp;
+    Buffer::Ptr _rtp;
     uint32_t _offset;
 };
 
diff --git a/src/TS/TSMediaSource.h b/src/TS/TSMediaSource.h
index 8b8c57f7..f13ad1c1 100644
--- a/src/TS/TSMediaSource.h
+++ b/src/TS/TSMediaSource.h
@@ -30,19 +30,8 @@ public:
     uint32_t time_stamp = 0;
 };
 
-//TS直播合并写策略类
-class TSFlushPolicy : public FlushPolicy{
-public:
-    TSFlushPolicy() = default;
-    ~TSFlushPolicy() = default;
-
-    uint32_t getStamp(const TSPacket::Ptr &packet) {
-        return packet->time_stamp;
-    }
-};
-
 //TS直播源
-class TSMediaSource : public MediaSource, public RingDelegate<TSPacket::Ptr>, public PacketCache<TSPacket, TSFlushPolicy>{
+class TSMediaSource : public MediaSource, public RingDelegate<TSPacket::Ptr>, public PacketCache<TSPacket>{
 public:
     using PoolType = ResourcePool<TSPacket>;
     using Ptr = std::shared_ptr<TSMediaSource>;
@@ -83,14 +72,15 @@ public:
         if (key) {
             _have_video = true;
         }
-        PacketCache<TSPacket, TSFlushPolicy>::inputPacket(true, std::move(packet), key);
+        auto stamp = packet->time_stamp;
+        PacketCache<TSPacket>::inputPacket(stamp, true, std::move(packet), key);
     }
 
     /**
      * 情况GOP缓存
      */
     void clearCache() override {
-        PacketCache<TSPacket, TSFlushPolicy>::clearCache();
+        PacketCache<TSPacket>::clearCache();
         _ring->clearCache();
     }