diff --git a/src/Extension/Factory.cpp b/src/Extension/Factory.cpp
index 6aedc4b5..a9a76fc8 100644
--- a/src/Extension/Factory.cpp
+++ b/src/Extension/Factory.cpp
@@ -88,8 +88,7 @@ Track::Ptr Factory::getTrackBySdp(const SdpTrack::Ptr &track) {
         return std::make_shared<H265Track>(vps,sps,pps,0,0,0);
     }
 
-
-    WarnL << "暂不支持该sdp:" << track->_codec << " " << track->_fmtp;
+    WarnL << "暂不支持该sdp:" << track->getName();
     return nullptr;
 }
 
diff --git a/src/Rtsp/Rtsp.cpp b/src/Rtsp/Rtsp.cpp
index 13203199..d6415231 100644
--- a/src/Rtsp/Rtsp.cpp
+++ b/src/Rtsp/Rtsp.cpp
@@ -30,6 +30,42 @@
 
 namespace mediakit{
 
+int RtpPayload::getClockRate(int pt){
+    switch (pt){
+#define SWITCH_CASE(name, type, value, clock_rate, channel) case value :  return clock_rate;
+        RTP_PT_MAP(SWITCH_CASE)
+#undef SWITCH_CASE
+        default: return 90000;
+    }
+}
+
+TrackType RtpPayload::getTrackType(int pt){
+    switch (pt){
+#define SWITCH_CASE(name, type, value, clock_rate, channel) case value :  return type;
+        RTP_PT_MAP(SWITCH_CASE)
+#undef SWITCH_CASE
+        default: return TrackInvalid;
+    }
+}
+
+int RtpPayload::getAudioChannel(int pt){
+    switch (pt){
+#define SWITCH_CASE(name, type, value, clock_rate, channel) case value :  return channel;
+        RTP_PT_MAP(SWITCH_CASE)
+#undef SWITCH_CASE
+        default: return 1;
+    }
+}
+
+const char * RtpPayload::getName(int pt){
+    switch (pt){
+#define SWITCH_CASE(name, type, value, clock_rate, channel) case value :  return #name;
+        RTP_PT_MAP(SWITCH_CASE)
+#undef SWITCH_CASE
+        default: return "unknown payload type";
+    }
+}
+
 static void getAttrSdp(const map<string, string> &attr, _StrPrinter &printer){
     const map<string, string>::value_type *ptr = nullptr;
     for(auto &pr : attr){
@@ -47,6 +83,16 @@ static void getAttrSdp(const map<string, string> &attr, _StrPrinter &printer){
         printer << "a=" << ptr->first << ":" << ptr->second << "\r\n";
     }
 }
+
+string SdpTrack::getName() const{
+    switch (_pt){
+#define SWITCH_CASE(name, type, value, clock_rate, channel) case value :  return #name;
+        RTP_PT_MAP(SWITCH_CASE)
+#undef SWITCH_CASE
+        default: return _codec;
+    }
+}
+
 string SdpTrack::toString() const {
     _StrPrinter _printer;
     switch (_type){
@@ -105,8 +151,9 @@ static TrackType toTrackType(const string &str) {
 void SdpParser::load(const string &sdp) {
     {
         _track_vec.clear();
-        string key;
         SdpTrack::Ptr track = std::make_shared<SdpTrack>();
+        track->_type = TrackTitle;
+        _track_vec.emplace_back(track);
 
         auto lines = split(sdp, "\n");
         for (auto &line : lines) {
@@ -136,11 +183,17 @@ void SdpParser::load(const string &sdp) {
                     track->_b = opt_val;
                     break;
                 case 'm': {
-                    track->_type = toTrackType(key);
-                    _track_vec.emplace_back(track);
                     track = std::make_shared<SdpTrack>();
-                    key = FindField(opt_val.data(), nullptr, " ");
-                    track->_m = opt_val;
+                    int pt, port;
+                    char rtp[16] = {0}, type[16];
+                    if (4 == sscanf(opt_val.data(), " %15[^ ] %d %15[^ ] %d", type, &port, rtp, &pt)) {
+                        track->_pt = pt;
+                        track->_samplerate = RtpPayload::getClockRate(pt) ;
+                        track->_type = toTrackType(type);
+                        track->_m = opt_val;
+                        track->_port = port;
+                        _track_vec.emplace_back(track);
+                    }
                 }
                     break;
                 case 'a': {
@@ -157,8 +210,6 @@ void SdpParser::load(const string &sdp) {
                     break;
             }
         }
-        track->_type = toTrackType(key);
-        _track_vec.emplace_back(track);
     }
 
     for (auto &track_ptr : _track_vec) {
diff --git a/src/Rtsp/Rtsp.h b/src/Rtsp/Rtsp.h
index bafc81be..41cd64a4 100644
--- a/src/Rtsp/Rtsp.h
+++ b/src/Rtsp/Rtsp.h
@@ -47,6 +47,40 @@ typedef enum {
     RTP_UDP = 1,
     RTP_MULTICAST = 2,
 } eRtpType;
+
+#define RTP_PT_MAP(XX) \
+    XX(PCMU, TrackAudio, 0, 8000, 1) \
+    XX(GSM, TrackAudio , 3, 8000, 1) \
+    XX(G723, TrackAudio, 4, 8000, 1) \
+    XX(DVI4_8000, TrackAudio, 5, 8000, 1) \
+    XX(DVI4_16000, TrackAudio, 6, 16000, 1) \
+    XX(LPC, TrackAudio, 7, 8000, 1) \
+    XX(PCMA, TrackAudio, 8, 8000, 1) \
+    XX(G722, TrackAudio, 9, 8000, 1) \
+    XX(L16_Stereo, TrackAudio, 10, 44100, 2) \
+    XX(L16_Mono, TrackAudio, 11, 44100, 1) \
+    XX(QCELP, TrackAudio, 12, 8000, 1) \
+    XX(CN, TrackAudio, 13, 8000, 1) \
+    XX(MPA, TrackAudio, 14, 90000, 1) \
+    XX(G728, TrackAudio, 15, 8000, 1) \
+    XX(DVI4_11025, TrackAudio, 16, 11025, 1) \
+    XX(DVI4_22050, TrackAudio, 17, 22050, 1) \
+    XX(G729, TrackAudio, 18, 8000, 1) \
+    XX(CelB, TrackVideo, 25, 90000, 1) \
+    XX(JPEG, TrackVideo, 26, 90000, 1) \
+    XX(nv, TrackVideo, 28, 90000, 1) \
+    XX(H261, TrackVideo, 31, 90000, 1) \
+    XX(MPV, TrackVideo, 32, 90000, 1) \
+    XX(MP2T, TrackVideo, 33, 90000, 1) \
+    XX(H263, TrackVideo, 34, 90000, 1) \
+
+typedef enum {
+#define ENUM_DEF(name, type, value, clock_rate, channel) PT_ ## name = value,
+    RTP_PT_MAP(ENUM_DEF)
+#undef ENUM_DEF
+    PT_MAX = 128
+} PayloadType;
+
 };
 
 class RtpPacket : public BufferRaw{
@@ -63,6 +97,17 @@ public:
     TrackType type;
 };
 
+class RtpPayload{
+public:
+    static int getClockRate(int pt);
+    static TrackType getTrackType(int pt);
+    static int getAudioChannel(int pt);
+    static const char *getName(int pt);
+private:
+    RtpPayload() = delete;
+    ~RtpPayload() = delete;
+};
+
 class RtcpCounter {
 public:
     uint32_t pktCnt = 0;
@@ -83,6 +128,7 @@ public:
     string _c;
     string _t;
     string _b;
+    uint16_t _port;
 
     float _duration = 0;
     float _start = 0;
@@ -92,6 +138,7 @@ public:
     map<string, string> _attr;
 
     string toString() const;
+    string getName() const;
 public:
     int _pt;
     string _codec;