diff --git a/src/Rtmp/FlvMuxer.cpp b/src/Rtmp/FlvMuxer.cpp
index 49cc349b..ab105a28 100644
--- a/src/Rtmp/FlvMuxer.cpp
+++ b/src/Rtmp/FlvMuxer.cpp
@@ -67,7 +67,7 @@ BufferRaw::Ptr FlvMuxer::obtainBuffer(const void *data, size_t len) {
     return buffer;
 }
 
-void FlvMuxer::onWriteFlvHeader(const RtmpMediaSource::Ptr &mediaSrc) {
+void FlvMuxer::onWriteFlvHeader(const RtmpMediaSource::Ptr &src) {
     //发送flv文件头
     auto buffer = BufferRaw::create();
     buffer->setCapacity(sizeof(FLVHeader));
@@ -80,15 +80,8 @@ void FlvMuxer::onWriteFlvHeader(const RtmpMediaSource::Ptr &mediaSrc) {
     header->flv[2] = 'V';
     header->version = 1;
     header->length = htonl(9);
-
-    mediaSrc->getConfigFrame([&](const RtmpPacket::Ptr &pkt) {
-        if (pkt->type_id == MSG_VIDEO) {
-            header->have_video = 1;
-        }
-        if (pkt->type_id == MSG_AUDIO) {
-            header->have_audio = 1;
-        }
-    });
+    header->have_video = src->haveVideo();
+    header->have_audio = src->haveAudio();
 
     //flv header
     onWrite(buffer, false);
@@ -97,7 +90,7 @@ void FlvMuxer::onWriteFlvHeader(const RtmpMediaSource::Ptr &mediaSrc) {
     auto size = htonl(0);
     onWrite(obtainBuffer((char *) &size, 4), false);
 
-    auto &metadata = mediaSrc->getMetaData();
+    auto &metadata = src->getMetaData();
     if (metadata) {
         //在有metadata的情况下才发送metadata
         //其实metadata没什么用，有些推流器不产生metadata
@@ -107,7 +100,7 @@ void FlvMuxer::onWriteFlvHeader(const RtmpMediaSource::Ptr &mediaSrc) {
     }
 
     //config frame
-    mediaSrc->getConfigFrame([&](const RtmpPacket::Ptr &pkt) {
+    src->getConfigFrame([&](const RtmpPacket::Ptr &pkt) {
         onWriteRtmp(pkt, true);
     });
 }
diff --git a/src/Rtmp/FlvMuxer.h b/src/Rtmp/FlvMuxer.h
index d551e4da..2f4a389c 100644
--- a/src/Rtmp/FlvMuxer.h
+++ b/src/Rtmp/FlvMuxer.h
@@ -34,7 +34,7 @@ protected:
     virtual std::shared_ptr<FlvMuxer> getSharedPtr() = 0;
 
 private:
-    void onWriteFlvHeader(const RtmpMediaSource::Ptr &media);
+    void onWriteFlvHeader(const RtmpMediaSource::Ptr &src);
     void onWriteRtmp(const RtmpPacket::Ptr &pkt, bool flush);
     void onWriteFlvTag(const RtmpPacket::Ptr &pkt, uint32_t time_stamp, bool flush);
     void onWriteFlvTag(uint8_t type, const Buffer::Ptr &buffer, uint32_t time_stamp, bool flush);
diff --git a/src/Rtmp/RtmpMediaSource.h b/src/Rtmp/RtmpMediaSource.h
index 045ee046..c8c19cbf 100644
--- a/src/Rtmp/RtmpMediaSource.h
+++ b/src/Rtmp/RtmpMediaSource.h
@@ -102,6 +102,8 @@ public:
     virtual void setMetaData(const AMFValue &metadata) {
         _metadata = metadata;
         _metadata.set("server", SERVER_NAME);
+        _have_video = _metadata["videocodecid"];
+        _have_audio = _metadata["audiocodecid"];
         if (_ring) {
             regist();
         }
@@ -125,7 +127,7 @@ public:
         //保存当前时间戳
         switch (pkt->type_id) {
             case MSG_VIDEO : _track_stamps[TrackVideo] = pkt->time_stamp, _have_video = true; break;
-            case MSG_AUDIO : _track_stamps[TrackAudio] = pkt->time_stamp; break;
+            case MSG_AUDIO : _track_stamps[TrackAudio] = pkt->time_stamp, _have_audio = true; break;
             default :  break;
         }
 
@@ -187,6 +189,14 @@ public:
         _ring->clearCache();
     }
 
+    bool haveVideo() const {
+        return _have_video;
+    }
+
+    bool haveAudio() const {
+        return _have_audio;
+    }
+
 private:
     /**
     * 批量flush rtmp包时触发该函数
@@ -200,6 +210,7 @@ private:
 
 private:
     bool _have_video = false;
+    bool _have_audio = false;
     int _ring_size;
     uint32_t _track_stamps[TrackMax] = {0};
     AMFValue _metadata;