diff --git a/CMakeLists.txt b/CMakeLists.txt
index b99e7bc..9cb4a13 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -32,7 +32,7 @@ set(OPENSSL_INCLUDE_DIR ${OpenSSL_ROOT}/include)
 set(OpenSSL_LIBRARY_DIRS ${OpenSSL_ROOT}/lib)
 set(OpenSSL_LIBRARIES libssl libcrypto)
 
-set(FFmpeg_ROOT ${Libraries_ROOT}/ffmpeg-7.0.1-full_build-shared)
+set(FFmpeg_ROOT ${Libraries_ROOT}/ffmpeg-7.0.2-full_build-shared)
 set(FFmpeg_INCLUDE_DIR ${FFmpeg_ROOT}/include)
 set(FFmpeg_LIB_DIR ${FFmpeg_ROOT}/lib)
 
diff --git a/Peripheral/DeviceDiscovery.cpp b/Peripheral/DeviceDiscovery.cpp
index 10a2035..8ffee6e 100644
--- a/Peripheral/DeviceDiscovery.cpp
+++ b/Peripheral/DeviceDiscovery.cpp
@@ -6,6 +6,13 @@
 #include <mfapi.h>
 #include <mfcaptureengine.h>
 
+struct DeviceDiscovery::Device {
+    Device(IMFMediaSource *source);
+    ~Device();
+    IMFMediaSource *source = nullptr;
+    IMFSourceReader *reader = nullptr;
+};
+
 template <class T>
 void SafeRelease(T **ppT) {
     if (*ppT) {
@@ -17,6 +24,21 @@ void SafeRelease(T **ppT) {
 DeviceDiscovery::DeviceDiscovery() {
 }
 
+static std::string deviceName(IMFActivate *device) {
+    std::string ret;
+    WCHAR *friendlyName = nullptr;
+    uint32_t nameLength = 0;
+    auto result = device->GetAllocatedString(MF_DEVSOURCE_ATTRIBUTE_FRIENDLY_NAME, &friendlyName, &nameLength);
+
+    if (SUCCEEDED(result)) {
+        ret = Amass::StringUtility::wstringToString(std::wstring(friendlyName, nameLength));
+    }
+    if (friendlyName != nullptr) {
+        CoTaskMemFree(friendlyName);
+    }
+    return ret;
+}
+
 std::shared_ptr<DeviceDiscovery::Device> DeviceDiscovery::find(const std::string &deviceName, std::error_code &error) {
     std::shared_ptr<Device> ret;
 
@@ -45,7 +67,7 @@ std::shared_ptr<DeviceDiscovery::Device> DeviceDiscovery::find(const std::string
 
     int index = -1;
     for (int i = 0; i < count; i++) {
-        auto name = this->deviceName(devices[i]);
+        auto name = ::deviceName(devices[i]);
         LOG(info) << "device[" << i << "]: " << name;
         if (name == deviceName) {
             index = i;
@@ -63,21 +85,6 @@ std::shared_ptr<DeviceDiscovery::Device> DeviceDiscovery::find(const std::string
     return ret;
 }
 
-std::string DeviceDiscovery::deviceName(IMFActivate *device) {
-    std::string ret;
-    WCHAR *friendlyName = nullptr;
-    uint32_t nameLength = 0;
-    auto result = device->GetAllocatedString(MF_DEVSOURCE_ATTRIBUTE_FRIENDLY_NAME, &friendlyName, &nameLength);
-
-    if (SUCCEEDED(result)) {
-        ret = Amass::StringUtility::wstringToString(std::wstring(friendlyName, nameLength));
-    }
-    if (friendlyName != nullptr) {
-        CoTaskMemFree(friendlyName);
-    }
-    return ret;
-}
-
 void DeviceDiscovery::enterOtaMode(const std::shared_ptr<Device> &device, std::error_code &error) {
     auto resolutions = deviceResolutions(device);
     LOG(info) << "device resolutions:";
@@ -144,7 +151,7 @@ std::vector<std::string> DeviceDiscovery::devices() {
     }
 
     for (int i = 0; i < count; i++) {
-        auto name = this->deviceName(devices[i]);
+        auto name = ::deviceName(devices[i]);
         ret.push_back(name);
     }
     return ret;
diff --git a/Peripheral/DeviceDiscovery.h b/Peripheral/DeviceDiscovery.h
index ecdb01f..4f16963 100644
--- a/Peripheral/DeviceDiscovery.h
+++ b/Peripheral/DeviceDiscovery.h
@@ -12,12 +12,7 @@ class DeviceDiscovery {
     constexpr static int32_t OtaSpecificWidth = 96;
 
 public:
-    struct Device {
-        Device(IMFMediaSource *source);
-        ~Device();
-        IMFMediaSource *source = nullptr;
-        IMFSourceReader *reader = nullptr;
-    };
+    struct Device;
 
     using Resolution = std::pair<int32_t, int32_t>;
     using Resolutions = std::vector<Resolution>;
@@ -27,7 +22,6 @@ public:
     std::vector<std::string> devices();
 
 protected:
-    std::string deviceName(IMFActivate *device);
     Resolutions deviceResolutions(const std::shared_ptr<Device> &source);
 };
 #endif // __DEVICEDISCOVERY_H__