diff --git a/client/browseZeroConf/browse_mdns.hpp b/client/browseZeroConf/browse_mdns.hpp
index 685366e3..66b172b0 100644
--- a/client/browseZeroConf/browse_mdns.hpp
+++ b/client/browseZeroConf/browse_mdns.hpp
@@ -12,6 +12,10 @@ enum IPVersion
 
 struct mDNSResult
 {
+    mDNSResult() : ip_version(IPv4), iface_idx(0), port(0), valid(false)
+    {
+    }
+
     IPVersion ip_version;
     int iface_idx;
     std::string ip;
diff --git a/client/stream.cpp b/client/stream.cpp
index c1e47d6f..6c0c3108 100644
--- a/client/stream.cpp
+++ b/client/stream.cpp
@@ -155,7 +155,7 @@ cs::time_point_clk Stream::getNextPlayerChunk(void* outputBuffer, uint32_t frame
 
 cs::time_point_clk Stream::getNextPlayerChunk(void* outputBuffer, uint32_t frames, int32_t framesCorrection)
 {
-    if (framesCorrection < 0 && frames + framesCorrection <= 0)
+    if (framesCorrection < 0 && (static_cast<int32_t>(frames) + framesCorrection <= 0))
     {
         // Avoid underflow in new char[] constructor.
         framesCorrection = -static_cast<int32_t>(frames) + 1;
diff --git a/common/aixlog.hpp b/common/aixlog.hpp
index df5343ca..d532baaa 100644
--- a/common/aixlog.hpp
+++ b/common/aixlog.hpp
@@ -559,7 +559,7 @@ public:
     }
 
     /// Without "init" every LOG(X) will simply go to clog
-    static void init(const std::vector<log_sink_ptr> log_sinks = {})
+    static void init(const std::vector<log_sink_ptr>& log_sinks = {})
     {
         Log::instance().log_sinks_.clear();
 
@@ -606,10 +606,15 @@ protected:
 
     virtual ~Log()
     {
-        sync();
+        do_sync();
     }
 
     int sync() override
+    {
+        return do_sync();
+    }
+
+    int do_sync()
     {
         std::lock_guard<std::recursive_mutex> lock(mutex_);
         if (!get_stream().str().empty())
diff --git a/common/daemon.cpp b/common/daemon.cpp
index 36588f88..89add969 100644
--- a/common/daemon.cpp
+++ b/common/daemon.cpp
@@ -64,7 +64,7 @@ void Daemon::daemonize()
 
     auto user_uid = static_cast<uid_t>(-1);
     auto user_gid = static_cast<gid_t>(-1);
-    std::string user_name;
+    // std::string user_name;
     // #ifdef FREEBSD
     //     bool had_group = false;
     // #endif
@@ -76,7 +76,7 @@ void Daemon::daemonize()
             throw SnapException("no such user \"" + user_ + "\"");
         user_uid = pwd->pw_uid;
         user_gid = pwd->pw_gid;
-        user_name = strdup(user_.c_str());
+        // user_name = strdup(user_.c_str());
         /// this is needed by libs such as arts
         setenv("HOME", pwd->pw_dir, 1);
     }
diff --git a/common/message/message.hpp b/common/message/message.hpp
index 7e536f54..d9ca8cd7 100644
--- a/common/message/message.hpp
+++ b/common/message/message.hpp
@@ -154,11 +154,11 @@ using message_ptr = std::shared_ptr<msg::BaseMessage>;
 
 struct BaseMessage
 {
-    BaseMessage() : type(message_type::kBase), id(0), refersTo(0)
+    BaseMessage() : BaseMessage(message_type::kBase)
     {
     }
 
-    BaseMessage(message_type type_) : type(type_), id(0), refersTo(0)
+    BaseMessage(message_type type_) : type(type_), id(0), refersTo(0), size(0)
     {
     }
 
@@ -272,8 +272,8 @@ protected:
 
     void writeVal(std::ostream& stream, const std::string& val) const
     {
-        auto size = static_cast<uint32_t>(val.size());
-        writeVal(stream, val.c_str(), size);
+        auto len = static_cast<uint32_t>(val.size());
+        writeVal(stream, val.c_str(), len);
     }
 
 
@@ -293,6 +293,7 @@ protected:
     void readVal(std::istream& stream, uint16_t& val) const
     {
         stream.read(reinterpret_cast<char*>(&val), sizeof(uint16_t));
+        // cppcheck-suppress selfAssignment
         val = SWAP_16(val);
     }
 
@@ -305,18 +306,21 @@ protected:
     void readVal(std::istream& stream, int16_t& val) const
     {
         stream.read(reinterpret_cast<char*>(&val), sizeof(int16_t));
+        // cppcheck-suppress selfAssignment
         val = SWAP_16(val);
     }
 
     void readVal(std::istream& stream, uint32_t& val) const
     {
         stream.read(reinterpret_cast<char*>(&val), sizeof(uint32_t));
+        // cppcheck-suppress selfAssignment
         val = SWAP_32(val);
     }
 
     void readVal(std::istream& stream, int32_t& val) const
     {
         stream.read(reinterpret_cast<char*>(&val), sizeof(int32_t));
+        // cppcheck-suppress selfAssignment
         val = SWAP_32(val);
     }
 
@@ -329,10 +333,10 @@ protected:
 
     void readVal(std::istream& stream, std::string& val) const
     {
-        uint32_t size;
-        readVal(stream, size);
-        val.resize(size);
-        stream.read(&val[0], size);
+        uint32_t len;
+        readVal(stream, len);
+        val.resize(len);
+        stream.read(&val[0], len);
     }
 
 
diff --git a/common/resampler.cpp b/common/resampler.cpp
index b15bf374..929fceae 100644
--- a/common/resampler.cpp
+++ b/common/resampler.cpp
@@ -29,7 +29,6 @@ static constexpr auto LOG_TAG = "Resampler";
 Resampler::Resampler(const SampleFormat& in_format, const SampleFormat& out_format) : in_format_(in_format), out_format_(out_format)
 {
 #ifdef HAS_SOXR
-    soxr_ = nullptr;
     if ((out_format_.rate() != in_format_.rate()) || (out_format_.bits() != in_format_.bits()))
     {
         LOG(INFO, LOG_TAG) << "Resampling from " << in_format_.toString() << " to " << out_format_.toString() << "\n";
diff --git a/common/resampler.hpp b/common/resampler.hpp
index 6cdc2140..b6b9517e 100644
--- a/common/resampler.hpp
+++ b/common/resampler.hpp
@@ -45,7 +45,7 @@ private:
     SampleFormat in_format_;
     SampleFormat out_format_;
 #ifdef HAS_SOXR
-    soxr_t soxr_;
+    soxr_t soxr_{nullptr};
 #endif
 };
 
diff --git a/common/utils/file_utils.hpp b/common/utils/file_utils.hpp
index d458f276..0fdac284 100644
--- a/common/utils/file_utils.hpp
+++ b/common/utils/file_utils.hpp
@@ -99,7 +99,7 @@ static int mkdirRecursive(const char* path, mode_t mode)
         if (p.empty())
             continue;
         ss << "/" << p;
-        int res = mkdir(ss.str().c_str(), mode);
+        res = mkdir(ss.str().c_str(), mode);
         if ((res != 0) && (errno != EEXIST))
             return res;
     }
diff --git a/server/encoder/flac_encoder.cpp b/server/encoder/flac_encoder.cpp
index 6ffa3a1b..ad1d2700 100644
--- a/server/encoder/flac_encoder.cpp
+++ b/server/encoder/flac_encoder.cpp
@@ -34,6 +34,8 @@ FlacEncoder::FlacEncoder(const std::string& codecOptions) : Encoder(codecOptions
 {
     headerChunk_.reset(new msg::CodecHeader("flac"));
     pcmBuffer_ = static_cast<FLAC__int32*>(malloc(pcmBufferSize_ * sizeof(FLAC__int32)));
+    metadata_[0] = nullptr;
+    metadata_[1] = nullptr;
 }
 
 
diff --git a/server/encoder/opus_encoder.cpp b/server/encoder/opus_encoder.cpp
index 8ac01300..7046f3f6 100644
--- a/server/encoder/opus_encoder.cpp
+++ b/server/encoder/opus_encoder.cpp
@@ -46,7 +46,7 @@ void assign(void* pointer, T val)
 } // namespace
 
 
-OpusEncoder::OpusEncoder(const std::string& codecOptions) : Encoder(codecOptions), enc_(nullptr)
+OpusEncoder::OpusEncoder(const std::string& codecOptions) : Encoder(codecOptions), enc_(nullptr), remainder_max_size_(0)
 {
     headerChunk_ = make_unique<msg::CodecHeader>("opus");
 }
diff --git a/server/streamreader/base64.cpp b/server/streamreader/base64.cpp
index 1e8fe716..608bacc8 100644
--- a/server/streamreader/base64.cpp
+++ b/server/streamreader/base64.cpp
@@ -40,7 +40,6 @@ std::string base64_encode(unsigned char const* bytes_to_encode, unsigned int in_
 {
     std::string ret;
     int i = 0;
-    int j = 0;
     unsigned char char_array_3[3];
     unsigned char char_array_4[4];
 
@@ -62,6 +61,7 @@ std::string base64_encode(unsigned char const* bytes_to_encode, unsigned int in_
 
     if (i != 0)
     {
+        int j = 0;
         for (j = i; j < 3; j++)
             char_array_3[j] = '\0';
 
@@ -85,7 +85,6 @@ std::string base64_decode(std::string const& encoded_string)
 {
     int in_len = encoded_string.size();
     int i = 0;
-    int j = 0;
     int in_ = 0;
     unsigned char char_array_4[4], char_array_3[3];
     std::string ret;
@@ -111,6 +110,7 @@ std::string base64_decode(std::string const& encoded_string)
 
     if (i != 0)
     {
+        int j = 0;
         for (j = i; j < 4; j++)
             char_array_4[j] = 0;