diff --git a/Source/C++/Apps/Mp4Mux/Mp4Mux.cpp b/Source/C++/Apps/Mp4Mux/Mp4Mux.cpp
index bc74ff69..9845a335 100644
--- a/Source/C++/Apps/Mp4Mux/Mp4Mux.cpp
+++ b/Source/C++/Apps/Mp4Mux/Mp4Mux.cpp
@@ -854,7 +854,7 @@ AddAc4Track(AP4_Movie&            movie,
     unsigned int   sample_description_index = 0;
 
     // read from the input, feed, and get AC-4 frames
-    AP4_UI32     sample_rate = 0;
+    // AP4_UI32     sample_rate = 0;
     AP4_Cardinal sample_count = 0;
     AP4_Cardinal sample_duration = 0;
     AP4_Cardinal media_time_scale = 0;
@@ -886,7 +886,7 @@ AddAc4Track(AP4_Movie&            movie,
                     ac4Dsi);                        // AC-4 DSI
                 sample_description_index = sample_table->GetSampleDescriptionCount();
                 sample_table->AddSampleDescription(sample_description);
-                sample_rate      = frame.m_Info.m_Ac4Dsi.d.v1.fs;
+                /* sample_rate = */frame.m_Info.m_Ac4Dsi.d.v1.fs;
                 sample_duration  = frame.m_Info.m_SampleDuration;
                 media_time_scale = frame.m_Info.m_MediaTimeScale;
 
diff --git a/Source/C++/Codecs/Ap4Eac3Parser.cpp b/Source/C++/Codecs/Ap4Eac3Parser.cpp
index 76f0ab46..44c12199 100644
--- a/Source/C++/Codecs/Ap4Eac3Parser.cpp
+++ b/Source/C++/Codecs/Ap4Eac3Parser.cpp
@@ -72,9 +72,9 @@ AP4_Eac3Header::AP4_Eac3Header(const AP4_UI08* bytes)
     }
 
     /* unsigned char dialnorm = */ bits.ReadBits(5);  // dialnorm
-    unsigned char compr;
+    // unsigned char compr;
     if (bits.ReadBit()) {                       // compre
-        compr = bits.ReadBits(8);
+        /* compr = */ bits.ReadBits(8);
     }
     
     if (m_Acmod == 0x0){                        // if 1+1 mode (dual mono, so some items need a second value)
@@ -98,28 +98,28 @@ AP4_Eac3Header::AP4_Eac3Header(const AP4_UI08* bytes)
     }
     
     // Extract mixing metadata 
-    unsigned char dmixmod, ltrtcmixlev, lorocmixlev, ltrtsurmixlev, lorosurmixlev, lfemixlevcod;
+    // unsigned char dmixmod, ltrtcmixlev, lorocmixlev, ltrtsurmixlev, lorosurmixlev, lfemixlevcod;
     if (bits.ReadBit()){                        // mixmdate
         if (m_Acmod  > 0x2) {
-            dmixmod = bits.ReadBits(2);
+            /* dmixmod = */ bits.ReadBits(2);
         }
         if ((m_Acmod & 0x1) && (m_Acmod > 0x2)) {
-            ltrtcmixlev = bits.ReadBits(3);
-            lorocmixlev = bits.ReadBits(3);
+            /* ltrtcmixlev = */ bits.ReadBits(3);
+            /* lorocmixlev = */ bits.ReadBits(3);
         }
         if (m_Acmod & 0x4) {
-            ltrtsurmixlev = bits.ReadBits(3);
-            lorosurmixlev = bits.ReadBits(3);
+            /* ltrtsurmixlev = */ bits.ReadBits(3);
+            /* lorosurmixlev = */ bits.ReadBits(3);
         }
         if (m_Lfeon) { 
             if (bits.ReadBit()) {               // lfemixlevcode
-                lfemixlevcod = bits.ReadBits(5);
+                /* lfemixlevcod = */ bits.ReadBits(5);
             }
         } 
         if (m_Strmtyp == 0x0) {                 // if independent stream
-            unsigned char pgmscl, extpgmscl;
+            // unsigned char pgmscl, extpgmscl;
             if (bits.ReadBit()) {               // pgmscle
-                pgmscl = bits.ReadBits(6);
+                /* pgmscl = */ bits.ReadBits(6);
             }
 
             if (m_Acmod == 0x0){                // if 1+1 mode (dual mono, so some items need a second value)
@@ -129,7 +129,7 @@ AP4_Eac3Header::AP4_Eac3Header(const AP4_UI08* bytes)
             }
 
             if(bits.ReadBit()) {                // extpgmscle
-                extpgmscl = bits.ReadBits(6);
+                /* extpgmscl = */ bits.ReadBits(6);
             }
 
             char mixdef = bits.ReadBits(2);
@@ -249,15 +249,15 @@ AP4_Eac3Header::AP4_Eac3Header(const AP4_UI08* bytes)
     m_Infomdate = bits.ReadBit();
     if (m_Infomdate){
         m_Bsmod = bits.ReadBits(3);
-        unsigned char copyrightb, origbs, dsurexmod;
-        copyrightb = bits.ReadBits(1);
-        origbs     = bits.ReadBits(1);
+        // unsigned char copyrightb, origbs, dsurexmod;
+        /* copyrightb = */ bits.ReadBits(1);
+        /* origbs     = */ bits.ReadBits(1);
 
         if (m_Acmod == 0x2) {                               // if in 2/0 mode
             bits.SkipBits(4);                               // dsurmod, dheadphonmod
         }
         if (m_Acmod >= 0x6) {                               // if both surround channels exist
-            dsurexmod = bits.ReadBits(2);
+            /* dsurexmod = */ bits.ReadBits(2);
         }
         if(bits.ReadBit()){                                 // audprodie
             bits.SkipBits(8);                               // mixlevel, roomtyp, adconvtyp
diff --git a/Source/C++/Core/Ap4Dac3Atom.cpp b/Source/C++/Core/Ap4Dac3Atom.cpp
index c1c26415..80a511e0 100644
--- a/Source/C++/Core/Ap4Dac3Atom.cpp
+++ b/Source/C++/Core/Ap4Dac3Atom.cpp
@@ -62,8 +62,9 @@ AP4_Dac3Atom::Create(AP4_Size size, AP4_ByteStream& stream)
 AP4_Dac3Atom::AP4_Dac3Atom(const AP4_Dac3Atom& other):
     AP4_Atom(AP4_ATOM_TYPE_DAC3, other.m_Size32),
     m_DataRate(other.m_DataRate),
-    m_RawBytes(other.m_RawBytes),
-    m_StreamInfo(other.m_StreamInfo){
+    m_StreamInfo(other.m_StreamInfo),
+    m_RawBytes(other.m_RawBytes)
+{
 }
 
 /*----------------------------------------------------------------------
diff --git a/Source/C++/Core/Ap4Dec3Atom.cpp b/Source/C++/Core/Ap4Dec3Atom.cpp
index 4c257f25..9ebadcb4 100644
--- a/Source/C++/Core/Ap4Dec3Atom.cpp
+++ b/Source/C++/Core/Ap4Dec3Atom.cpp
@@ -62,10 +62,11 @@ AP4_Dec3Atom::Create(AP4_Size size, AP4_ByteStream& stream)
 AP4_Dec3Atom::AP4_Dec3Atom(const AP4_Dec3Atom& other):
     AP4_Atom(AP4_ATOM_TYPE_DEC3, other.m_Size32), 
     m_DataRate(other.m_DataRate),
-    m_RawBytes(other.m_RawBytes),
-    m_SubStreams(other.m_SubStreams),
     m_FlagEC3ExtensionTypeA(other.m_FlagEC3ExtensionTypeA),
-    m_ComplexityIndexTypeA(other.m_ComplexityIndexTypeA){
+    m_ComplexityIndexTypeA(other.m_ComplexityIndexTypeA),
+    m_SubStreams(other.m_SubStreams),
+    m_RawBytes(other.m_RawBytes)
+{
 }
 
 /*----------------------------------------------------------------------
@@ -74,7 +75,6 @@ AP4_Dec3Atom::AP4_Dec3Atom(const AP4_Dec3Atom& other):
 AP4_Dec3Atom::AP4_Dec3Atom():
     AP4_Atom(AP4_ATOM_TYPE_DEC3, AP4_ATOM_HEADER_SIZE), 
     m_DataRate(0),
-    m_RawBytes(0),
     m_FlagEC3ExtensionTypeA(0),
     m_ComplexityIndexTypeA(0)
 {