diff --git a/src/gui/render.h b/src/gui/render.h
index c677425..31f8da8 100644
--- a/src/gui/render.h
+++ b/src/gui/render.h
@@ -202,14 +202,17 @@ class Render {
  public:
   static void OnReceiveVideoBufferCb(const XVideoFrame* video_frame,
                                      const char* user_id, size_t user_id_size,
+                                     const char* src_id, size_t src_id_size,
                                      void* user_data);
 
   static void OnReceiveAudioBufferCb(const char* data, size_t size,
                                      const char* user_id, size_t user_id_size,
+                                     const char* src_id, size_t src_id_size,
                                      void* user_data);
 
   static void OnReceiveDataBufferCb(const char* data, size_t size,
                                     const char* user_id, size_t user_id_size,
+                                    const char* src_id, size_t src_id_size,
                                     void* user_data);
 
   static void OnSignalStatusCb(SignalStatus status, const char* user_id,
diff --git a/src/gui/render_callback.cpp b/src/gui/render_callback.cpp
index 79cefdf..f73ac74 100644
--- a/src/gui/render_callback.cpp
+++ b/src/gui/render_callback.cpp
@@ -216,6 +216,7 @@ void Render::SdlCaptureAudioOut([[maybe_unused]] void* userdata,
 
 void Render::OnReceiveVideoBufferCb(const XVideoFrame* video_frame,
                                     const char* user_id, size_t user_id_size,
+                                    const char* src_id, size_t src_id_size,
                                     void* user_data) {
   Render* render = (Render*)user_data;
   if (!render) {
@@ -283,6 +284,7 @@ void Render::OnReceiveVideoBufferCb(const XVideoFrame* video_frame,
 
 void Render::OnReceiveAudioBufferCb(const char* data, size_t size,
                                     const char* user_id, size_t user_id_size,
+                                    const char* src_id, size_t src_id_size,
                                     void* user_data) {
   Render* render = (Render*)user_data;
   if (!render) {
@@ -302,16 +304,19 @@ void Render::OnReceiveAudioBufferCb(const char* data, size_t size,
 
 void Render::OnReceiveDataBufferCb(const char* data, size_t size,
                                    const char* user_id, size_t user_id_size,
+                                   const char* src_id, size_t src_id_size,
                                    void* user_data) {
   Render* render = (Render*)user_data;
   if (!render) {
     return;
   }
 
-  // try to parse as file-transfer chunk first
-  static FileReceiver receiver;
-  if (receiver.OnData(data, size)) {
-    return;
+  std::string source_id = std::string(src_id, src_id_size);
+  LOG_ERROR("Receive from source [{}]", source_id);
+  if (source_id == "file") {
+    // try to parse as file-transfer chunk first
+    static FileReceiver receiver;
+    receiver.OnData(data, size);
   }
 
   std::string json_str(data, size);
diff --git a/src/tools/file_transfer.cpp b/src/tools/file_transfer.cpp
index f8638ce..104a4bc 100644
--- a/src/tools/file_transfer.cpp
+++ b/src/tools/file_transfer.cpp
@@ -165,6 +165,7 @@ std::filesystem::path FileReceiver::GetDefaultDesktopPath() {
 }
 
 bool FileReceiver::OnData(const char* data, size_t size) {
+  LOG_ERROR("FileReceiver::OnData: size={}", size);
   if (!data || size < sizeof(FileChunkHeader)) {
     LOG_ERROR("FileReceiver::OnData: invalid buffer");
     return false;
diff --git a/submodules/minirtc b/submodules/minirtc
index 04e1af6..bfc9b0c 160000
--- a/submodules/minirtc
+++ b/submodules/minirtc
@@ -1 +1 @@
-Subproject commit 04e1af6331f23b994fa4d753414b8c4002944300
+Subproject commit bfc9b0c9d4610f98255886fb05afcb2dbfc8b785