diff --git a/QtScrcpy/adb/adbprocess.cpp b/QtScrcpy/adb/adbprocess.cpp
index c84645d..5dcd92c 100644
--- a/QtScrcpy/adb/adbprocess.cpp
+++ b/QtScrcpy/adb/adbprocess.cpp
@@ -53,20 +53,20 @@ void AdbProcess::initSignals()
         } else {
             emit adbProcessResult(AER_ERROR_START);
             QString err = QString("qprocess start error:%1 %2").arg(program()).arg(arguments().join(" "));
-            qCritical(err.toStdString().c_str());
+            qCritical() << err.toStdString().c_str();
         }
     });
 
     connect(this, &QProcess::readyReadStandardError, this, [this]() {
         QString tmp = QString::fromUtf8(readAllStandardError()).trimmed();
         m_errorOutput += tmp;
-        qWarning(QString("AdbProcess::error:%1").arg(tmp).toStdString().data());
+        qWarning() << QString("AdbProcess::error:%1").arg(tmp).toStdString().data();
     });
 
     connect(this, &QProcess::readyReadStandardOutput, this, [this]() {
         QString tmp = QString::fromUtf8(readAllStandardOutput()).trimmed();
         m_standardOutput += tmp;
-        qInfo(QString("AdbProcess::out:%1").arg(tmp).toStdString().data());
+        qInfo() << QString("AdbProcess::out:%1").arg(tmp).toStdString().data();
     });
 
     connect(this, &QProcess::started, this, [this]() { emit adbProcessResult(AER_SUCCESS_START); });
diff --git a/QtScrcpy/device/controller/inputconvert/inputconvertgame.cpp b/QtScrcpy/device/controller/inputconvert/inputconvertgame.cpp
index 739d0e2..0e1c722 100644
--- a/QtScrcpy/device/controller/inputconvert/inputconvertgame.cpp
+++ b/QtScrcpy/device/controller/inputconvert/inputconvertgame.cpp
@@ -13,7 +13,7 @@ InputConvertGame::~InputConvertGame() {}
 void InputConvertGame::mouseEvent(const QMouseEvent *from, const QSize &frameSize, const QSize &showSize)
 {
     // 处理开关按键
-    if (m_keyMap.isSwitchOnKeyboard() == false && m_keyMap.getSwitchKey() == from->button()) {
+    if (m_keyMap.isSwitchOnKeyboard() == false && m_keyMap.getSwitchKey() == static_cast<int>(from->button())) {
         if (from->type() != QEvent::MouseButtonPress) {
             return;
         }
diff --git a/QtScrcpy/device/decoder/fpscounter.h b/QtScrcpy/device/decoder/fpscounter.h
index d39df67..badb958 100644
--- a/QtScrcpy/device/decoder/fpscounter.h
+++ b/QtScrcpy/device/decoder/fpscounter.h
@@ -24,7 +24,7 @@ private:
     void resetCounter();
 
 private:
-    quint32 m_counterTimer = 0;
+    qint32 m_counterTimer = 0;
     quint32 m_curRendered = 0;
     quint32 m_curSkipped = 0;
 
diff --git a/QtScrcpy/device/device.cpp b/QtScrcpy/device/device.cpp
index c0e6a26..fe87af9 100644
--- a/QtScrcpy/device/device.cpp
+++ b/QtScrcpy/device/device.cpp
@@ -211,7 +211,7 @@ void Device::initSignals()
         connect(m_server, &Server::connectToResult, this, [this](bool success, const QString &deviceName, const QSize &size) {
             if (success) {
                 double diff = m_startTimeCount.elapsed() / 1000.0;
-                qInfo(QString("server start finish in %1s").arg(diff).toStdString().c_str());
+                qInfo() << QString("server start finish in %1s").arg(diff).toStdString().c_str();
 
                 // update ui
                 if (m_videoForm) {
diff --git a/QtScrcpy/device/recorder/recorder.cpp b/QtScrcpy/device/recorder/recorder.cpp
index 2bd29eb..a8130af 100644
--- a/QtScrcpy/device/recorder/recorder.cpp
+++ b/QtScrcpy/device/recorder/recorder.cpp
@@ -102,7 +102,7 @@ bool Recorder::open(const AVCodec *inputCodec)
     if (ret < 0) {
         char errorbuf[255] = { 0 };
         av_strerror(ret, errorbuf, 254);
-        qCritical(QString("Failed to open output file: %1 %2").arg(errorbuf).arg(m_fileName).toUtf8().toStdString().c_str());
+        qCritical() << QString("Failed to open output file: %1 %2").arg(errorbuf).arg(m_fileName).toUtf8().toStdString().c_str();
         // ostream will be cleaned up during context cleaning
         avformat_free_context(m_formatCtx);
         m_formatCtx = Q_NULLPTR;
@@ -118,10 +118,10 @@ void Recorder::close()
         if (m_headerWritten) {
             int ret = av_write_trailer(m_formatCtx);
             if (ret < 0) {
-                qCritical(QString("Failed to write trailer to %1").arg(m_fileName).toUtf8().toStdString().c_str());
+                qCritical() << QString("Failed to write trailer to %1").arg(m_fileName).toUtf8().toStdString().c_str();
                 m_failed = true;
             } else {
-                qInfo(QString("success record %1").arg(m_fileName).toStdString().c_str());
+                qInfo() << QString("success record %1").arg(m_fileName).toStdString().c_str();
             }
         } else {
             // the recorded file is empty
diff --git a/QtScrcpy/device/render/qyuvopenglwidget.h b/QtScrcpy/device/render/qyuvopenglwidget.h
index 949b4ac..cdeb2d0 100644
--- a/QtScrcpy/device/render/qyuvopenglwidget.h
+++ b/QtScrcpy/device/render/qyuvopenglwidget.h
@@ -12,7 +12,7 @@ class QYUVOpenGLWidget
     Q_OBJECT
 public:
     explicit QYUVOpenGLWidget(QWidget *parent = nullptr);
-    virtual ~QYUVOpenGLWidget();
+    virtual ~QYUVOpenGLWidget() override;
 
     QSize minimumSizeHint() const override;
     QSize sizeHint() const override;
@@ -22,9 +22,9 @@ public:
     void updateTextures(quint8 *dataY, quint8 *dataU, quint8 *dataV, quint32 linesizeY, quint32 linesizeU, quint32 linesizeV);
 
 protected:
-    void initializeGL();
-    void paintGL();
-    void resizeGL(int width, int height);
+    void initializeGL() override;
+    void paintGL() override;
+    void resizeGL(int width, int height) override;
 
 private:
     void initShader();
diff --git a/QtScrcpy/device/server/server.cpp b/QtScrcpy/device/server/server.cpp
index 2226980..6dfe5a7 100644
--- a/QtScrcpy/device/server/server.cpp
+++ b/QtScrcpy/device/server/server.cpp
@@ -255,7 +255,7 @@ bool Server::startServerByStep()
                 // try to connect until the server socket is listening on the device.
                 m_serverSocket.setMaxPendingConnections(2);
                 if (!m_serverSocket.listen(QHostAddress::LocalHost, m_params.localPort)) {
-                    qCritical(QString("Could not listen on port %1").arg(m_params.localPort).toStdString().c_str());
+                    qCritical() << QString("Could not listen on port %1").arg(m_params.localPort).toStdString().c_str();
                     m_serverStartStep = SSS_NULL;
                     if (m_tunnelForward) {
                         disableTunnelForward();
diff --git a/QtScrcpy/device/server/videosocket.cpp b/QtScrcpy/device/server/videosocket.cpp
index fae8ff5..bc4a396 100644
--- a/QtScrcpy/device/server/videosocket.cpp
+++ b/QtScrcpy/device/server/videosocket.cpp
@@ -45,7 +45,7 @@ qint32 VideoSocket::subThreadRecvData(quint8 *buf, qint32 bufSize)
 
 bool VideoSocket::event(QEvent *event)
 {
-    if (event->type() == QScrcpyEvent::VideoSocket) {
+    if (static_cast<QScrcpyEvent::Type>(event->type()) == QScrcpyEvent::VideoSocket) {
         onReadyRead();
         return true;
     }
diff --git a/QtScrcpy/device/stream/stream.cpp b/QtScrcpy/device/stream/stream.cpp
index 17c96de..4e26d34 100644
--- a/QtScrcpy/device/stream/stream.cpp
+++ b/QtScrcpy/device/stream/stream.cpp
@@ -27,19 +27,18 @@ static void avLogCallback(void *avcl, int level, const char *fmt, va_list vl)
     switch (level) {
     case AV_LOG_PANIC:
     case AV_LOG_FATAL:
-        qFatal(localFmt.toUtf8());
-        break;
+        qFatal("%s", localFmt.toUtf8().data());
     case AV_LOG_ERROR:
-        qCritical(localFmt.toUtf8());
+        qCritical() << localFmt.toUtf8();
         break;
     case AV_LOG_WARNING:
-        qWarning(localFmt.toUtf8());
+        qWarning() << localFmt.toUtf8();
         break;
     case AV_LOG_INFO:
-        qInfo(localFmt.toUtf8());
+        qInfo() << localFmt.toUtf8();
         break;
     case AV_LOG_DEBUG:
-        //qDebug(localFmt.toUtf8());
+        // qDebug() << localFmt.toUtf8();
         break;
     }
 
diff --git a/QtScrcpy/devicemanage/devicemanage.cpp b/QtScrcpy/devicemanage/devicemanage.cpp
index f6ad67e..9d6e113 100644
--- a/QtScrcpy/devicemanage/devicemanage.cpp
+++ b/QtScrcpy/devicemanage/devicemanage.cpp
@@ -212,6 +212,7 @@ void DeviceManage::onControlStateChange(Device *device, Device::GroupControlStat
 
 void DeviceManage::onMouseEvent(const QMouseEvent *from, const QSize &frameSize, const QSize &showSize)
 {
+    Q_UNUSED(frameSize)
     QMapIterator<QString, QPointer<Device>> i(m_devices);
     while (i.hasNext()) {
         i.next();
@@ -228,6 +229,7 @@ void DeviceManage::onMouseEvent(const QMouseEvent *from, const QSize &frameSize,
 
 void DeviceManage::onWheelEvent(const QWheelEvent *from, const QSize &frameSize, const QSize &showSize)
 {
+    Q_UNUSED(frameSize)
     QMapIterator<QString, QPointer<Device>> i(m_devices);
     while (i.hasNext()) {
         i.next();
@@ -244,6 +246,7 @@ void DeviceManage::onWheelEvent(const QWheelEvent *from, const QSize &frameSize,
 
 void DeviceManage::onKeyEvent(const QKeyEvent *from, const QSize &frameSize, const QSize &showSize)
 {
+    Q_UNUSED(frameSize)
     QMapIterator<QString, QPointer<Device>> i(m_devices);
     while (i.hasNext()) {
         i.next();
diff --git a/QtScrcpy/main.cpp b/QtScrcpy/main.cpp
index 27665dd..9af29c2 100644
--- a/QtScrcpy/main.cpp
+++ b/QtScrcpy/main.cpp
@@ -98,10 +98,9 @@ int main(int argc, char *argv[])
     g_mainDlg->setWindowTitle(Config::getInstance().getTitle());
     g_mainDlg->show();
 
-    qInfo(QObject::tr("This software is completely open source and free. Strictly used for illegal purposes, or at your own risk. You can download it at the "
-                      "following address:")
-              .toUtf8());
-    qInfo(QString("QtScrcpy %1 <https://github.com/barry-ran/QtScrcpy>").arg(QCoreApplication::applicationVersion()).toUtf8());
+    qInfo() << QObject::tr("This software is completely open source and free. Strictly used for illegal purposes, or at your own risk. You can download it at the "
+                           "following address:").toUtf8();
+    qInfo() << QString("QtScrcpy %1 <https://github.com/barry-ran/QtScrcpy>").arg(QCoreApplication::applicationVersion()).toUtf8();
 
     int ret = a.exec();