diff --git a/QtScrcpy/recorder/recorder.cpp b/QtScrcpy/recorder/recorder.cpp
index 70d1d82..f8ee961 100644
--- a/QtScrcpy/recorder/recorder.cpp
+++ b/QtScrcpy/recorder/recorder.cpp
@@ -28,7 +28,7 @@ void Recorder::setFormat(Recorder::RecorderFormat format)
     m_format = format;
 }
 
-bool Recorder::open(AVCodec *inputCodec)
+bool Recorder::open(const AVCodec* inputCodec)
 {
     QString formatName = recorderGetFormatName(m_format);
     Q_ASSERT(!formatName.isEmpty());
@@ -132,7 +132,7 @@ const AVOutputFormat *Recorder::findMuxer(const char* name)
     return outFormat;
 }
 
-bool Recorder::recorderWriteHeader(AVPacket *packet)
+bool Recorder::recorderWriteHeader(const AVPacket* packet)
 {
     AVStream *ostream = m_formatCtx->streams[0];
     quint8* extradata = (quint8*)av_malloc(packet->size * sizeof(quint8));
@@ -162,7 +162,7 @@ bool Recorder::recorderWriteHeader(AVPacket *packet)
     return true;
 }
 
-void Recorder::recorderRescalePacket(AVPacket *packet)
+void Recorder::recorderRescalePacket(AVPacket* packet)
 {
     AVStream *ostream = m_formatCtx->streams[0];
     av_packet_rescale_ts(packet, SCRCPY_TIME_BASE, ostream->time_base);
diff --git a/QtScrcpy/recorder/recorder.h b/QtScrcpy/recorder/recorder.h
index 31dfc63..59c8c39 100644
--- a/QtScrcpy/recorder/recorder.h
+++ b/QtScrcpy/recorder/recorder.h
@@ -22,13 +22,13 @@ public:
 
     void setFrameSize(const QSize& declaredFrameSize);
     void setFormat(Recorder::RecorderFormat format);
-    bool open(AVCodec* inputCodec);
+    bool open(const AVCodec* inputCodec);
     void close();
     bool write(AVPacket* packet);
 
 private:
     const AVOutputFormat* findMuxer(const char* name);
-    bool recorderWriteHeader(AVPacket* packet);
+    bool recorderWriteHeader(const AVPacket* packet);
     void recorderRescalePacket(AVPacket *packet);
     QString recorderGetFormatName(Recorder::RecorderFormat format);
     RecorderFormat guessRecordFormat(const QString& fileName);