diff --git a/src/Http/HttpSession.cpp b/src/Http/HttpSession.cpp
index 3e8ba4da..7b58a232 100644
--- a/src/Http/HttpSession.cpp
+++ b/src/Http/HttpSession.cpp
@@ -332,7 +332,8 @@ bool HttpSession::checkLiveStreamTS(const function<void()> &cb){
 
 //http-flv 链接格式:http://vhost-url:port/app/streamid.flv?key1=value1&key2=value2
 bool HttpSession::checkLiveStreamFlv(const function<void()> &cb){
-    return checkLiveStream(RTMP_SCHEMA, ".flv", [this, cb](const MediaSource::Ptr &src) {
+    auto start_pts = atoll(_parser.getUrlArgs()["starPts"].data());
+    return checkLiveStream(RTMP_SCHEMA, ".flv", [this, cb, start_pts](const MediaSource::Ptr &src) {
         auto rtmp_src = dynamic_pointer_cast<RtmpMediaSource>(src);
         assert(rtmp_src);
         if (!cb) {
@@ -359,7 +360,7 @@ bool HttpSession::checkLiveStreamFlv(const function<void()> &cb){
             }
         }
 
-        start(getPoller(), rtmp_src);
+        start(getPoller(), rtmp_src, start_pts);
     });
 }
 
diff --git a/src/Rtmp/FlvMuxer.cpp b/src/Rtmp/FlvMuxer.cpp
index 5728d30f..ffcb9ef0 100644
--- a/src/Rtmp/FlvMuxer.cpp
+++ b/src/Rtmp/FlvMuxer.cpp
@@ -20,17 +20,17 @@ FlvMuxer::FlvMuxer(){
     _packet_pool.setSize(64);
 }
 
-void FlvMuxer::start(const EventPoller::Ptr &poller, const RtmpMediaSource::Ptr &media) {
+void FlvMuxer::start(const EventPoller::Ptr &poller, const RtmpMediaSource::Ptr &media, uint32_t start_pts) {
     if (!media) {
         throw std::runtime_error("RtmpMediaSource 无效");
     }
     if (!poller->isCurrentThread()) {
         weak_ptr<FlvMuxer> weakSelf = getSharedPtr();
         //延时两秒启动录制，目的是为了等待config帧收集完毕
-        poller->doDelayTask(2000, [weakSelf, poller, media]() {
+        poller->doDelayTask(2000, [weakSelf, poller, media, start_pts]() {
             auto strongSelf = weakSelf.lock();
             if (strongSelf) {
-                strongSelf->start(poller, media);
+                strongSelf->start(poller, media, start_pts);
             }
             return 0;
         });
@@ -50,9 +50,8 @@ void FlvMuxer::start(const EventPoller::Ptr &poller, const RtmpMediaSource::Ptr
         strongSelf->onDetach();
     });
 
-    //音频同步于视频
-    _stamp[0].syncTo(_stamp[1]);
-    _ring_reader->setReadCB([weakSelf](const RtmpMediaSource::RingDataType &pkt) {
+    bool check = start_pts > 0;
+    _ring_reader->setReadCB([weakSelf, start_pts, check](const RtmpMediaSource::RingDataType &pkt) mutable {
         auto strongSelf = weakSelf.lock();
         if (!strongSelf) {
             return;
@@ -61,6 +60,12 @@ void FlvMuxer::start(const EventPoller::Ptr &poller, const RtmpMediaSource::Ptr
         size_t i = 0;
         auto size = pkt->size();
         pkt->for_each([&](const RtmpPacket::Ptr &rtmp) {
+            if (check) {
+                if (rtmp->time_stamp < start_pts) {
+                    return;
+                }
+                check = false;
+            }
             strongSelf->onWriteRtmp(rtmp, ++i == size);
         });
     });
@@ -137,9 +142,7 @@ void FlvMuxer::onWriteFlvTag(uint8_t type, const Buffer::Ptr &buffer, uint32_t t
 }
 
 void FlvMuxer::onWriteRtmp(const RtmpPacket::Ptr &pkt, bool flush) {
-    int64_t dts_out;
-    _stamp[pkt->type_id % 2].revise(pkt->time_stamp, 0, dts_out, dts_out);
-    onWriteFlvTag(pkt, (uint32_t) dts_out, flush);
+    onWriteFlvTag(pkt, pkt->time_stamp, flush);
 }
 
 void FlvMuxer::stop() {
diff --git a/src/Rtmp/FlvMuxer.h b/src/Rtmp/FlvMuxer.h
index caf1903c..8c0d63cd 100644
--- a/src/Rtmp/FlvMuxer.h
+++ b/src/Rtmp/FlvMuxer.h
@@ -28,7 +28,7 @@ public:
     void stop();
 
 protected:
-    void start(const EventPoller::Ptr &poller, const RtmpMediaSource::Ptr &media);
+    void start(const EventPoller::Ptr &poller, const RtmpMediaSource::Ptr &media, uint32_t start_pts = 0);
     virtual void onWrite(const Buffer::Ptr &data, bool flush) = 0;
     virtual void onDetach() = 0;
     virtual std::shared_ptr<FlvMuxer> getSharedPtr() = 0;
@@ -43,8 +43,6 @@ private:
 
 private:
     ResourcePool<BufferRaw> _packet_pool;
-    //时间戳修整器
-    Stamp _stamp[2];
     RtmpMediaSource::RingType::RingReader::Ptr _ring_reader;
 };