diff --git a/src/ice/ice_agent.cpp b/src/ice/ice_agent.cpp
index 51a3d3e..296a154 100644
--- a/src/ice/ice_agent.cpp
+++ b/src/ice/ice_agent.cpp
@@ -1,17 +1,21 @@
 #include "ice_agent.h"
 
+#include <glib.h>
+
 #include <cstring>
 #include <iostream>
 
 #include "log.h"
 
-IceAgent::IceAgent(bool enable_turn, bool trickle_ice, bool offer_peer,
-                   std::string &stun_ip, uint16_t stun_port,
-                   std::string &turn_ip, uint16_t turn_port,
+IceAgent::IceAgent(bool offer_peer, bool use_trickle_ice, bool use_reliable_ice,
+                   bool enable_turn, bool force_turn, std::string &stun_ip,
+                   uint16_t stun_port, std::string &turn_ip, uint16_t turn_port,
                    std::string &turn_username, std::string &turn_password)
-    : enable_turn_(enable_turn),
-      trickle_ice_(trickle_ice),
-      stun_ip_(stun_ip),
+    : stun_ip_(stun_ip),
+      use_trickle_ice_(use_trickle_ice),
+      use_reliable_ice_(use_reliable_ice),
+      enable_turn_(enable_turn),
+      force_turn_(force_turn),
       stun_port_(stun_port),
       turn_ip_(turn_ip),
       turn_port_(turn_port),
@@ -26,7 +30,6 @@ IceAgent::~IceAgent() {
   g_object_unref(agent_);
   g_free(ice_ufrag_);
   g_free(ice_password_);
-  g_free(stream_sdp_);
 }
 
 int IceAgent::CreateIceAgent(nice_cb_state_changed_t on_state_changed,
@@ -52,17 +55,17 @@ int IceAgent::CreateIceAgent(nice_cb_state_changed_t on_state_changed,
 
     agent_ = nice_agent_new_full(
         g_main_loop_get_context(gloop_), NICE_COMPATIBILITY_RFC5245,
-        (NiceAgentOption)(trickle_ice_
-                              ? NICE_AGENT_OPTION_ICE_TRICKLE |
-                                    (enable_turn_ ? NICE_AGENT_OPTION_NONE
-                                                  : NICE_AGENT_OPTION_RELIABLE)
-                              : (enable_turn_ ? NICE_AGENT_OPTION_NONE
-                                              : NICE_AGENT_OPTION_RELIABLE)));
+        (NiceAgentOption)(use_trickle_ice_
+                              ? (NICE_AGENT_OPTION_ICE_TRICKLE |
+                                 (use_reliable_ice_ ? NICE_AGENT_OPTION_RELIABLE
+                                                    : NICE_AGENT_OPTION_NONE))
+                              : (use_reliable_ice_ ? NICE_AGENT_OPTION_RELIABLE
+                                                   : NICE_AGENT_OPTION_NONE)));
 
     LOG_INFO(
         "Nice agent init with [trickle ice|{}], [reliable mode|{}], [turn "
-        "support|{}]]",
-        trickle_ice_, !enable_turn_, enable_turn_);
+        "support|{}], [force turn|{}]]",
+        use_trickle_ice_, use_reliable_ice_, enable_turn_, force_turn_);
 
     if (agent_ == nullptr) {
       LOG_ERROR("Failed to create agent_");
@@ -95,7 +98,9 @@ int IceAgent::CreateIceAgent(nice_cb_state_changed_t on_state_changed,
                                 NICE_RELAY_TYPE_TURN_TCP);
     }
 
-    // g_object_set(agent_, "force-relay", true, NULL);
+    if (force_turn_) {
+      g_object_set(agent_, "force-relay", true, NULL);
+    }
 
     nice_agent_attach_recv(agent_, stream_id_, NICE_COMPONENT_TYPE_RTP,
                            g_main_loop_get_context(gloop_), on_recv_,
@@ -142,12 +147,12 @@ int IceAgent::DestroyIceAgent() {
   return 0;
 }
 
-char *IceAgent::GetLocalStreamSdp() {
-  stream_sdp_ = nice_agent_generate_local_stream_sdp(agent_, stream_id_, true);
-  return stream_sdp_;
+const char *IceAgent::GetLocalStreamSdp() {
+  local_sdp_ = nice_agent_generate_local_stream_sdp(agent_, stream_id_, true);
+  return local_sdp_.c_str();
 }
 
-char *IceAgent::GenerateLocalSdp() {
+const char *IceAgent::GenerateLocalSdp() {
   if (!nice_inited_) {
     LOG_ERROR("Nice agent has not been initialized");
     return nullptr;
@@ -164,9 +169,9 @@ char *IceAgent::GenerateLocalSdp() {
   }
 
   local_sdp_ = nice_agent_generate_local_sdp(agent_);
-  LOG_INFO("Generate local sdp:[\n{}]", local_sdp_);
+  LOG_INFO("Generate local sdp:[\n{}]", local_sdp_.c_str());
 
-  return local_sdp_;
+  return local_sdp_.c_str();
 }
 
 int IceAgent::SetRemoteSdp(const char *remote_sdp) {
diff --git a/src/ice/ice_agent.h b/src/ice/ice_agent.h
index 60fa921..20cf5ac 100644
--- a/src/ice/ice_agent.h
+++ b/src/ice/ice_agent.h
@@ -29,10 +29,10 @@ typedef void (*nice_cb_recv_t)(NiceAgent* agent, guint stream_id,
 
 class IceAgent {
  public:
-  IceAgent(bool enable_turn, bool trickle_ice, bool offer_peer,
-           std::string& stun_ip, uint16_t stun_port, std::string& turn_ip,
-           uint16_t turn_port, std::string& turn_username,
-           std::string& turn_password);
+  IceAgent(bool offer_peer, bool use_trickle_ice, bool use_reliable_ice,
+           bool enable_turn, bool force_turn, std::string& stun_ip,
+           uint16_t stun_port, std::string& turn_ip, uint16_t turn_port,
+           std::string& turn_username, std::string& turn_password);
   ~IceAgent();
 
   int CreateIceAgent(nice_cb_state_changed_t on_state_changed,
@@ -43,9 +43,9 @@ class IceAgent {
 
   int DestroyIceAgent();
 
-  char* GetLocalStreamSdp();
+  const char* GetLocalStreamSdp();
 
-  char* GenerateLocalSdp();
+  const char* GenerateLocalSdp();
 
   int SetRemoteSdp(const char* remote_sdp);
 
@@ -58,7 +58,11 @@ class IceAgent {
   int Send(const char* data, size_t size);
 
  public:
+  bool use_trickle_ice_ = true;
+  bool use_reliable_ice_ = false;
   bool enable_turn_ = false;
+  bool force_turn_ = false;
+
   std::string stun_ip_ = "";
   uint16_t stun_port_ = 0;
   std::string turn_ip_ = "";
@@ -72,14 +76,13 @@ class IceAgent {
   std::atomic<bool> nice_inited_{false};
 
   gboolean exit_nice_thread_ = false;
-  bool trickle_ice_ = true;
   bool controlling_ = false;
   gchar* ice_ufrag_ = nullptr;
   gchar* ice_password_ = nullptr;
-  gchar* stream_sdp_ = nullptr;
   uint32_t stream_id_ = 0;
   uint32_t n_components_ = 1;
-  char* local_sdp_ = nullptr;
+  // char* local_sdp_ = nullptr;
+  std::string local_sdp_ = "";
   NiceComponentState state_ = NiceComponentState::NICE_COMPONENT_STATE_LAST;
   bool destroyed_ = false;
   gboolean agent_closed_ = false;
diff --git a/src/pc/peer_connection.cpp b/src/pc/peer_connection.cpp
index 499a334..be5bd5f 100644
--- a/src/pc/peer_connection.cpp
+++ b/src/pc/peer_connection.cpp
@@ -51,6 +51,7 @@ int PeerConnection::Init(PeerConnectionParams params,
     cfg_hardware_acceleration_ =
         reader.Get("hardware acceleration", "turn_on", "false");
     cfg_av1_encoding_ = reader.Get("av1 encoding", "turn_on", "false");
+    cfg_enable_turn_ = reader.Get("enable turn", "turn_on", "false");
 
     std::regex regex("\n");
 
@@ -61,6 +62,7 @@ int PeerConnection::Init(PeerConnectionParams params,
     hardware_acceleration_ =
         cfg_hardware_acceleration_ == "true" ? true : false;
     av1_encoding_ = cfg_av1_encoding_ == "true" ? true : false;
+    enable_turn_ = cfg_enable_turn_ == "true" ? true : false;
 
   } else {
     cfg_signal_server_ip_ = params.signal_server_ip;
@@ -777,9 +779,13 @@ void PeerConnection::ProcessIceWorkMsg(const IceWorkMsg &msg) {
 
       for (auto &remote_user_id : user_id_list) {
         ice_transmission_list_[remote_user_id] =
-            std::make_unique<IceTransmission>(
-                enable_turn_, trickle_ice_, true, transmission_id, user_id_,
-                remote_user_id, ws_transport_, on_ice_status_change_);
+            std::make_unique<IceTransmission>(true, transmission_id, user_id_,
+                                              remote_user_id, ws_transport_,
+                                              on_ice_status_change_);
+
+        ice_transmission_list_[remote_user_id]->SetLocalCapabilities(
+            trickle_ice_, false, enable_turn_, false, video_payload_types_,
+            audio_payload_types_);
 
         ice_transmission_list_[remote_user_id]->SetOnReceiveVideoFunc(
             on_receive_video_);
@@ -820,9 +826,13 @@ void PeerConnection::ProcessIceWorkMsg(const IceWorkMsg &msg) {
           ice_transmission_list_.find(remote_user_id)) {
         // Enable TURN for answer peer by default
         ice_transmission_list_[remote_user_id] =
-            std::make_unique<IceTransmission>(
-                true, trickle_ice_, false, transmission_id, user_id_,
-                remote_user_id, ws_transport_, on_ice_status_change_);
+            std::make_unique<IceTransmission>(false, transmission_id, user_id_,
+                                              remote_user_id, ws_transport_,
+                                              on_ice_status_change_);
+
+        ice_transmission_list_[remote_user_id]->SetLocalCapabilities(
+            trickle_ice_, false, enable_turn_, false, std::vector<int>(),
+            std::vector<int>());
 
         ice_transmission_list_[remote_user_id]->SetOnReceiveVideoFunc(
             on_receive_video_);
diff --git a/src/pc/peer_connection.h b/src/pc/peer_connection.h
index f1d368f..7e4c145 100644
--- a/src/pc/peer_connection.h
+++ b/src/pc/peer_connection.h
@@ -129,6 +129,7 @@ class PeerConnection {
   std::string cfg_turn_server_password_;
   std::string cfg_hardware_acceleration_;
   std::string cfg_av1_encoding_;
+  std::string cfg_enable_turn_;
   int signal_server_port_ = 0;
   int stun_server_port_ = 0;
   int turn_server_port_ = 0;
@@ -138,6 +139,9 @@ class PeerConnection {
   bool trickle_ice_ = true;
   TraversalMode mode_ = TraversalMode::P2P;
   bool try_rejoin_with_turn_ = true;
+  std::vector<int> video_payload_types_ = {RtpPacket::PAYLOAD_TYPE::H264,
+                                           RtpPacket::PAYLOAD_TYPE::AV1};
+  std::vector<int> audio_payload_types_ = {RtpPacket::PAYLOAD_TYPE::OPUS};
 
  private:
   std::shared_ptr<WsClient> ws_transport_ = nullptr;
diff --git a/src/transmission/ice_transmission.cpp b/src/transmission/ice_transmission.cpp
index 9b40a55..2b4ca1f 100644
--- a/src/transmission/ice_transmission.cpp
+++ b/src/transmission/ice_transmission.cpp
@@ -12,13 +12,10 @@
 using nlohmann::json;
 
 IceTransmission::IceTransmission(
-    bool enable_turn, bool trickle_ice, bool offer_peer,
-    std::string &transmission_id, std::string &user_id,
+    bool offer_peer, std::string &transmission_id, std::string &user_id,
     std::string &remote_user_id, std::shared_ptr<WsClient> ice_ws_transmission,
     std::function<void(std::string)> on_ice_status_change)
-    : enable_turn_(enable_turn),
-      trickle_ice_(trickle_ice),
-      offer_peer_(offer_peer),
+    : offer_peer_(offer_peer),
       transmission_id_(transmission_id),
       user_id_(user_id),
       remote_user_id_(remote_user_id),
@@ -39,6 +36,19 @@ IceTransmission::~IceTransmission() {
   }
 }
 
+int IceTransmission::SetLocalCapabilities(
+    bool use_trickle_ice, bool use_reliable_ice, bool enable_turn,
+    bool force_turn, std::vector<int> &video_payload_types,
+    std::vector<int> &audio_payload_types) {
+  use_trickle_ice_ = use_trickle_ice;
+  use_reliable_ice_ = use_reliable_ice;
+  enable_turn_ = force_turn;
+  force_turn_ = force_turn;
+  video_payload_types_ = video_payload_types;
+  audio_payload_types_ = audio_payload_types;
+  return 0;
+}
+
 int IceTransmission::InitIceTransmission(
     std::string &stun_ip, int stun_port, std::string &turn_ip, int turn_port,
     std::string &turn_username, std::string &turn_password,
@@ -204,8 +214,9 @@ int IceTransmission::InitIceTransmission(
   rtp_data_sender_->Start();
 
   ice_agent_ = std::make_unique<IceAgent>(
-      enable_turn_, trickle_ice_, offer_peer_, stun_ip, stun_port, turn_ip,
-      turn_port, turn_username, turn_password);
+      offer_peer_, use_trickle_ice_, use_reliable_ice_, enable_turn_,
+      force_turn_, stun_ip, stun_port, turn_ip, turn_port, turn_username,
+      turn_password);
 
   ice_agent_->CreateIceAgent(
       [](NiceAgent *agent, guint stream_id, guint component_id,
@@ -235,7 +246,7 @@ int IceTransmission::InitIceTransmission(
           IceTransmission *ice_transmission_obj =
               static_cast<IceTransmission *>(user_ptr);
 
-          if (ice_transmission_obj->trickle_ice_) {
+          if (ice_transmission_obj->use_trickle_ice_) {
             GSList *cands =
                 nice_agent_get_local_candidates(agent, stream_id, component_id);
             NiceCandidate *cand;
@@ -274,7 +285,7 @@ int IceTransmission::InitIceTransmission(
           LOG_INFO("[{}->{}] gather_done", ice_transmission_obj->user_id_,
                    ice_transmission_obj->remote_user_id_);
 
-          if (!ice_transmission_obj->trickle_ice_) {
+          if (!ice_transmission_obj->use_trickle_ice_) {
             if (ice_transmission_obj->offer_peer_) {
               ice_transmission_obj->SendOffer();
             } else {
@@ -352,7 +363,7 @@ int IceTransmission::SetTransmissionId(const std::string &transmission_id) {
 int IceTransmission::JoinTransmission() {
   LOG_INFO("[{}] Join transmission", user_id_);
 
-  if (trickle_ice_) {
+  if (use_trickle_ice_) {
     SendOffer();
   } else {
     GatherCandidates();
@@ -371,19 +382,33 @@ int IceTransmission::GatherCandidates() {
 int IceTransmission::SetRemoteSdp(const std::string &remote_sdp) {
   ice_agent_->SetRemoteSdp(remote_sdp.c_str());
   // LOG_INFO("[{}] set remote sdp", user_id_);
+
+  // GetAceptedVideoPayloadType(remote_sdp);
+  // GetAceptedAudioPayloadType(remote_sdp);
+
   remote_ice_username_ = GetIceUsername(remote_sdp);
   return 0;
 }
 
 int IceTransmission::SendOffer() {
+  local_sdp_ = use_trickle_ice_ ? ice_agent_->GetLocalStreamSdp()
+                                : ice_agent_->GenerateLocalSdp();
+
+  std::string toReplace = "ICE/SDP";
+  std::string replacement = "UDP/TLS/RTP/SAVPF 111 114 115 116 123 124 125";
+
+  size_t pos = 0;
+  while ((pos = local_sdp_.find(toReplace, pos)) != std::string::npos) {
+    local_sdp_.replace(pos, toReplace.length(), replacement);
+    pos += replacement.length();
+  }
+
   json message = {{"type", "offer"},
                   {"transmission_id", transmission_id_},
                   {"user_id", user_id_},
                   {"remote_user_id", remote_user_id_},
-                  {"sdp", trickle_ice_ ? ice_agent_->GetLocalStreamSdp()
-                                       : ice_agent_->GenerateLocalSdp()}};
-  // LOG_INFO("Send offer with sdp:[{}]", message.dump());
-
+                  {"sdp", local_sdp_.c_str()}};
+  LOG_INFO("Send offer with sdp:\n[\n{}]", local_sdp_.c_str());
   if (ice_ws_transport_) {
     ice_ws_transport_->Send(message.dump());
     LOG_INFO("[{}->{}] send offer", user_id_, remote_user_id_);
@@ -392,13 +417,14 @@ int IceTransmission::SendOffer() {
 }
 
 int IceTransmission::SendAnswer() {
+  local_sdp_ = use_trickle_ice_ ? ice_agent_->GetLocalStreamSdp()
+                                : ice_agent_->GenerateLocalSdp();
   json message = {{"type", "answer"},
                   {"transmission_id", transmission_id_},
                   {"user_id", user_id_},
                   {"remote_user_id", remote_user_id_},
-                  {"sdp", trickle_ice_ ? ice_agent_->GetLocalStreamSdp()
-                                       : ice_agent_->GenerateLocalSdp()}};
-  // LOG_INFO("Send answer with sdp:[{}]", message.dump());
+                  {"sdp", local_sdp_.c_str()}};
+  LOG_INFO("Send answer with sdp:\n[\n{}]", local_sdp_.c_str());
   if (ice_ws_transport_) {
     ice_ws_transport_->Send(message.dump());
     LOG_INFO("[{}->{}] send answer", user_id_, remote_user_id_);
@@ -407,6 +433,61 @@ int IceTransmission::SendAnswer() {
   return 0;
 }
 
+// int IceTransmission::AppendLocalCapabilitiesToSdp() {
+//   std::string toReplace = "ICE/SDP";
+//   std::string replacement = "UDP/TLS/RTP/SAVPF 111 114 115 116 123 124 125";
+
+//   size_t pos = 0;
+//   while ((pos = local_sdp_.find(toReplace, pos)) != std::string::npos) {
+//     local_sdp_.replace(pos, toReplace.length(), replacement);
+//     pos += replacement.length();
+//   }
+
+//   return 0;
+// }
+
+RtpPacket::PAYLOAD_TYPE IceTransmission::GetAceptedVideoPayloadType(
+    const std::string &remote_sdp) {
+  if (!video_pt_.empty()) {
+    return RtpPacket::PAYLOAD_TYPE::H264;
+  }
+  std::size_t start =
+      remote_sdp.find("m=video ") + std::string("m=video ").length();
+  if (start != std::string::npos) {
+    std::size_t end = remote_sdp.find("\n", start);
+    std::string::size_type pos1 = remote_sdp.find(' ', start);
+    std::string::size_type pos2 = remote_sdp.find(' ', pos1 + 1);
+    std::string::size_type pos3 = remote_sdp.find(' ', pos2 + 1);
+    if (end != std::string::npos && pos1 != std::string::npos &&
+        pos2 != std::string::npos && pos3 != std::string::npos) {
+      video_pt_ = remote_sdp.substr(pos3 + 1, end - pos3 - 1);
+    }
+  }
+  LOG_INFO("video pt [{}]", video_pt_.c_str());
+  return RtpPacket::PAYLOAD_TYPE::H264;
+}
+
+RtpPacket::PAYLOAD_TYPE IceTransmission::GetAceptedAudioPayloadType(
+    const std::string &remote_sdp) {
+  if (!audio_pt_.empty()) {
+    return RtpPacket::PAYLOAD_TYPE::H264;
+  }
+  std::size_t start =
+      remote_sdp.find("m=audio ") + std::string("m=audio ").length();
+  if (start != std::string::npos) {
+    std::size_t end = remote_sdp.find("\n", start);
+    std::string::size_type pos1 = remote_sdp.find(' ', start);
+    std::string::size_type pos2 = remote_sdp.find(' ', pos1 + 1);
+    std::string::size_type pos3 = remote_sdp.find(' ', pos2 + 1);
+    if (end != std::string::npos && pos1 != std::string::npos &&
+        pos2 != std::string::npos && pos3 != std::string::npos) {
+      audio_pt_ = remote_sdp.substr(pos3 + 1, end - pos3 - 1);
+    }
+  }
+  LOG_INFO("audio pt [{}]", audio_pt_.c_str());
+  return RtpPacket::PAYLOAD_TYPE::OPUS;
+}
+
 int IceTransmission::SendData(DATA_TYPE type, const char *data, size_t size) {
   if (state_ != NICE_COMPONENT_STATE_CONNECTED &&
       state_ != NICE_COMPONENT_STATE_READY) {
diff --git a/src/transmission/ice_transmission.h b/src/transmission/ice_transmission.h
index 150514e..9da6156 100644
--- a/src/transmission/ice_transmission.h
+++ b/src/transmission/ice_transmission.h
@@ -35,14 +35,18 @@ class IceTransmission {
   enum TraversalType { TP2P = 0, TRelay = 1, TUnknown = 2 };
 
  public:
-  IceTransmission(bool enable_turn, bool trickle_ice, bool offer_peer,
-                  std::string &transmission_id, std::string &user_id,
-                  std::string &remote_user_id,
+  IceTransmission(bool offer_peer, std::string &transmission_id,
+                  std::string &user_id, std::string &remote_user_id,
                   std::shared_ptr<WsClient> ice_ws_transmission,
                   std::function<void(std::string)> on_ice_status_change);
   ~IceTransmission();
 
  public:
+  int SetLocalCapabilities(bool use_trickle_ice, bool use_reliable_ice,
+                           bool enable_turn, bool force_turn,
+                           std::vector<int> &video_payload_types,
+                           std::vector<int> &audio_payload_types);
+
   int InitIceTransmission(std::string &stun_ip, int stun_port,
                           std::string &turn_ip, int turn_port,
                           std::string &turn_username,
@@ -99,6 +103,12 @@ class IceTransmission {
 
   int SendAnswer();
 
+ private:
+  RtpPacket::PAYLOAD_TYPE GetAceptedVideoPayloadType(
+      const std::string &remote_sdp);
+  RtpPacket::PAYLOAD_TYPE GetAceptedAudioPayloadType(
+      const std::string &remote_sdp);
+
  private:
   uint8_t CheckIsRtcpPacket(const char *buffer, size_t size);
   uint8_t CheckIsVideoPacket(const char *buffer, size_t size);
@@ -106,8 +116,13 @@ class IceTransmission {
   uint8_t CheckIsDataPacket(const char *buffer, size_t size);
 
  private:
+  bool use_trickle_ice_ = true;
   bool enable_turn_ = false;
-  bool trickle_ice_ = true;
+  bool use_reliable_ice_ = false;
+  bool force_turn_ = false;
+  std::vector<int> video_payload_types_;
+  std::vector<int> audio_payload_types_;
+
   std::string local_sdp_;
   std::string remote_sdp_;
   std::string new_local_candidate_;
@@ -154,6 +169,10 @@ class IceTransmission {
 
  private:
   std::unique_ptr<IOStatistics> ice_io_statistics_ = nullptr;
+
+ private:
+  std::string video_pt_;
+  std::string audio_pt_;
 };
 
 #endif
\ No newline at end of file