diff --git a/webrtc/Sdp.cpp b/webrtc/Sdp.cpp
index d24d5a06..3b2cfc9d 100644
--- a/webrtc/Sdp.cpp
+++ b/webrtc/Sdp.cpp
@@ -493,6 +493,7 @@ void SdpAttrExtmap::parse(const string &str)  {
         if (sscanf(str.data(), "%" SCNd32 " %127s", &index, buf) != 2) {
             SDP_THROW();
         }
+        direction = RtpDirection::sendrecv;
     } else {
         direction = getRtpDirection(direction_buf);
     }
@@ -1076,4 +1077,82 @@ void RtcSession::checkValid() const{
     for (auto &item : media) {
         item.checkValid();
     }
+}
+
+void RtcConfigure::RtcTrackConfigure::setDefaultSetting(TrackType type){
+    enable = true;
+    rtcp_mux = true;
+    rtcp_rsize = false;
+    group_bundle = true;
+    unified_plan = false;
+    support_rtx = true;
+    support_red = false;
+    support_ulpfec = false;
+    support_simulcast = false;
+    ice_lite = true;
+    ice_trickle = true;
+    ice_renomination = false;
+    switch (type) {
+        case TrackVideo: {
+            preferred_codec = {CodecAAC, CodecOpus, CodecG711U, CodecG711A};
+            rtcp_fb = {"transport-cc"};
+            extmap = {"1 urn:ietf:params:rtp-hdrext:ssrc-audio-level"};
+            break;
+        }
+        case TrackAudio: {
+            preferred_codec = {CodecH264, CodecH265};
+            rtcp_fb = {"nack", "ccm fir", "nack pli", "goog-remb", "transport-cc"};
+            extmap = {"2 urn:ietf:params:rtp-hdrext:toffset",
+                      "3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time",
+                      "4 urn:3gpp:video-orientation",
+                      "5 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01",
+                      "6 http://www.webrtc.org/experiments/rtp-hdrext/playout-delay"};
+            break;
+        }
+        case TrackApplication: {
+            enable = false;
+            break;
+        }
+        default: break;
+    }
+}
+
+void RtcConfigure::setDefaultSetting(string ice_ufrag,
+                                     string ice_pwd,
+                                     DtlsRole role,
+                                     RtpDirection direction,
+                                     const SdpAttrFingerprint &fingerprint) {
+
+    video.setDefaultSetting(TrackVideo);
+    audio.setDefaultSetting(TrackAudio);
+    application.setDefaultSetting(TrackApplication);
+
+    video.ice_ufrag = audio.ice_ufrag = application.ice_ufrag = ice_ufrag;
+    video.ice_pwd = audio.ice_pwd = application.ice_pwd = ice_ufrag;
+    video.role = audio.role = application.role = role;
+    video.direction = audio.direction = application.direction = direction;
+    video.fingerprint = audio.fingerprint = application.fingerprint = fingerprint;
+}
+
+void RtcConfigure::addCandidate(const SdpAttrCandidate &candidate, TrackType type) {
+    switch (type) {
+        case TrackAudio: {
+            audio.candidate.emplace_back(candidate);
+            break;
+        }
+        case TrackVideo: {
+            video.candidate.emplace_back(candidate);
+            break;
+        }
+        case TrackApplication: {
+            application.candidate.emplace_back(candidate);
+            break;
+        }
+        default: {
+            audio.candidate.emplace_back(candidate);
+            video.candidate.emplace_back(candidate);
+            application.candidate.emplace_back(candidate);
+            break;
+        }
+    }
 }
\ No newline at end of file
diff --git a/webrtc/Sdp.h b/webrtc/Sdp.h
index 51163e01..efca5783 100644
--- a/webrtc/Sdp.h
+++ b/webrtc/Sdp.h
@@ -609,5 +609,49 @@ public:
     void checkValid() const;
 };
 
+class RtcConfigure {
+public:
+    class RtcTrackConfigure {
+    public:
+        bool enable;
+        bool rtcp_mux;
+        bool rtcp_rsize;
+        bool group_bundle;
+        bool unified_plan;
+        bool support_rtx;
+        bool support_red;
+        bool support_ulpfec;
+
+        bool support_simulcast;
+        bool ice_lite;
+        bool ice_trickle;
+        bool ice_renomination;
+        string ice_ufrag;
+        string ice_pwd;
+
+        DtlsRole role{DtlsRole::invalid};
+        RtpDirection direction{RtpDirection::invalid};
+        SdpAttrFingerprint fingerprint;
+
+        vector<string> rtcp_fb;
+        vector<CodecId> preferred_codec;
+        vector<string> extmap;
+        vector<SdpAttrCandidate> candidate;
+
+        void setDefaultSetting(TrackType type);
+    };
+
+    RtcTrackConfigure video;
+    RtcTrackConfigure audio;
+    RtcTrackConfigure application;
+
+    void setDefaultSetting(string ice_ufrag,
+                           string ice_pwd,
+                           DtlsRole role,
+                           RtpDirection direction,
+                           const SdpAttrFingerprint &fingerprint);
+    void addCandidate(const SdpAttrCandidate &candidate, TrackType type = TrackInvalid);
+};
+
 
 #endif //ZLMEDIAKIT_SDP_H