diff --git a/ext-codec/H264.cpp b/ext-codec/H264.cpp
index 7f796ea0..d542a8aa 100644
--- a/ext-codec/H264.cpp
+++ b/ext-codec/H264.cpp
@@ -235,13 +235,17 @@ void H264Track::setExtraData(const uint8_t *data, size_t bytes) {
 }
 
 bool H264Track::update() {
-    _config_frames = std::vector<Frame::Ptr>{
-        createConfigFrame<H264Frame>(_sps, 0, getIndex()),
-        createConfigFrame<H264Frame>(_pps, 0, getIndex())
-    };
     return getAVCInfo(_sps, _width, _height, _fps);
 }
 
+std::vector<Frame::Ptr> H264Track::getConfigFrames() const {
+    if (!ready()) {
+        return {};
+    }
+    return { createConfigFrame<H264Frame>(_sps, 0, getIndex()),
+             createConfigFrame<H264Frame>(_pps, 0, getIndex()) };
+}
+
 Track::Ptr H264Track::clone() const {
     return std::make_shared<H264Track>(*this);
 }
diff --git a/ext-codec/H264.h b/ext-codec/H264.h
index 9d662037..e76263a9 100644
--- a/ext-codec/H264.h
+++ b/ext-codec/H264.h
@@ -115,7 +115,7 @@ public:
     toolkit::Buffer::Ptr getExtraData() const override;
     void setExtraData(const uint8_t *data, size_t size) override;
     bool update() override;
-    std::vector<Frame::Ptr> getConfigFrames() const override { return _config_frames; }
+    std::vector<Frame::Ptr> getConfigFrames() const override;
 
 private:
     Sdp::Ptr getSdp(uint8_t payload_type) const override;
@@ -130,7 +130,6 @@ private:
     float _fps = 0;
     std::string _sps;
     std::string _pps;
-    std::vector<Frame::Ptr> _config_frames;
 };
 
 template <typename FrameType>
diff --git a/ext-codec/H265.cpp b/ext-codec/H265.cpp
index 4bf3e2ff..ae649b1d 100644
--- a/ext-codec/H265.cpp
+++ b/ext-codec/H265.cpp
@@ -182,14 +182,18 @@ void H265Track::setExtraData(const uint8_t *data, size_t bytes) {
 }
 
 bool H265Track::update() {
-    _config_frames = std::vector<Frame::Ptr>{
-        createConfigFrame<H265Frame>(_vps, 0, getIndex()),
-        createConfigFrame<H265Frame>(_sps, 0, getIndex()),
-        createConfigFrame<H265Frame>(_pps, 0, getIndex())
-    };
     return getHEVCInfo(_vps, _sps, _width, _height, _fps);
 }
 
+std::vector<Frame::Ptr> H265Track::getConfigFrames() const {
+    if (!ready()) {
+        return {};
+    }
+    return { createConfigFrame<H265Frame>(_vps, 0, getIndex()),
+             createConfigFrame<H265Frame>(_sps, 0, getIndex()),
+             createConfigFrame<H265Frame>(_pps, 0, getIndex()) };
+}
+
 Track::Ptr H265Track::clone() const {
     return std::make_shared<H265Track>(*this);
 }
diff --git a/ext-codec/H265.h b/ext-codec/H265.h
index 8132f444..b95f72e8 100644
--- a/ext-codec/H265.h
+++ b/ext-codec/H265.h
@@ -142,7 +142,7 @@ public:
     toolkit::Buffer::Ptr getExtraData() const override;
     void setExtraData(const uint8_t *data, size_t size) override;
     bool update() override;
-    std::vector<Frame::Ptr> getConfigFrames() const override { return _config_frames; }
+    std::vector<Frame::Ptr> getConfigFrames() const override;
 
 private:
     Sdp::Ptr getSdp(uint8_t payload_type) const override;
@@ -158,7 +158,6 @@ private:
     std::string _vps;
     std::string _sps;
     std::string _pps;
-    std::vector<Frame::Ptr> _config_frames;
 };
 
 }//namespace mediakit
diff --git a/webrtc/WebRtcPlayer.cpp b/webrtc/WebRtcPlayer.cpp
index b410a154..83ff5830 100644
--- a/webrtc/WebRtcPlayer.cpp
+++ b/webrtc/WebRtcPlayer.cpp
@@ -129,7 +129,12 @@ void WebRtcPlayer::sendConfigFrames(uint32_t before_seq, uint32_t sample_rate, u
     if (!play_src) {
         return;
     }
-    auto video_track = std::dynamic_pointer_cast<mediakit::VideoTrack>(play_src->getTrack(mediakit::TrackVideo));
+    SdpParser parser(play_src->getSdp());
+    auto video_sdp = parser.getTrack(TrackVideo);
+    if (!video_sdp) {
+        return;
+    }
+    auto video_track = dynamic_pointer_cast<VideoTrack>(Factory::getTrackBySdp(video_sdp));
     if (!video_track) {
         return;
     }
@@ -146,9 +151,8 @@ void WebRtcPlayer::sendConfigFrames(uint32_t before_seq, uint32_t sample_rate, u
     encoder->setRtpInfo(0, video_mtu, sample_rate, 0, 0, 0);
 
     auto seq = before_seq - frames.size();
-    for (const auto &frame : video_track->getConfigFrames()) {
-        auto rtp = encoder->getRtpInfo().makeRtp(
-            TrackVideo, frame->data() + frame->prefixSize(), frame->size() - frame->prefixSize(), false, 0);
+    for (const auto &frame : frames) {
+        auto rtp = encoder->getRtpInfo().makeRtp(TrackVideo, frame->data() + frame->prefixSize(), frame->size() - frame->prefixSize(), false, 0);
         auto header = rtp->getHeader();
         header->seq = htons(seq++);
         header->stamp = htonl(timestamp);