diff -Nru qtmultimedia-opensource-src-5.2.1/debian/changelog qtmultimedia-opensource-src-5.2.1/debian/changelog
--- qtmultimedia-opensource-src-5.2.1/debian/changelog	2014-03-16 08:44:05.000000000 +0000
+++ qtmultimedia-opensource-src-5.2.1/debian/changelog	2014-03-16 16:37:06.000000000 +0000
@@ -1,3 +1,10 @@
+qtmultimedia-opensource-src (5.2.1-0ubuntu4) trusty; urgency=medium
+
+  * Update the previous patch to never do duplicate endianness
+    conversion.
+
+ -- Dmitry Shachnev <mitya57@ubuntu.com>  Sun, 16 Mar 2014 20:36:22 +0400
+
 qtmultimedia-opensource-src (5.2.1-0ubuntu3) trusty; urgency=medium
 
   * Add new patch to support big-endian systems (a second attempt to
diff -Nru qtmultimedia-opensource-src-5.2.1/debian/patches/bigendian_support.diff qtmultimedia-opensource-src-5.2.1/debian/patches/bigendian_support.diff
--- qtmultimedia-opensource-src-5.2.1/debian/patches/bigendian_support.diff	2014-03-16 08:42:20.000000000 +0000
+++ qtmultimedia-opensource-src-5.2.1/debian/patches/bigendian_support.diff	2014-03-16 16:34:41.000000000 +0000
@@ -22,7 +22,15 @@
  
              dataSize = descriptor.size;
  
-@@ -234,6 +238,8 @@
+@@ -227,13 +231,15 @@
+ bool QWaveDecoder::enoughDataAvailable()
+ {
+     chunk descriptor;
+-    if (!peekChunk(&descriptor))
++    if (!peekChunk(&descriptor, false))
+         return false;
+ 
+     // This is only called for the RIFF/RIFX header, before bigEndian is set,
      // so we have to manually swizzle
      if (qstrncmp(descriptor.id, "RIFX", 4) == 0)
          descriptor.size = qFromBigEndian<quint32>(descriptor.size);
@@ -31,12 +39,38 @@
  
      if (source->bytesAvailable() < qint64(sizeof(chunk) + descriptor.size))
          return false;
-@@ -279,6 +285,8 @@
-     source->peek(reinterpret_cast<char *>(pChunk), sizeof(chunk));
-     if (bigEndian)
-         pChunk->size = qFromBigEndian<quint32>(pChunk->size);
-+    else
-+        pChunk->size = qFromLittleEndian<quint32>(pChunk->size);
+@@ -270,16 +276,18 @@
+     return false;
+ }
  
+-// Handles endianness
+-bool QWaveDecoder::peekChunk(chunk *pChunk)
++bool QWaveDecoder::peekChunk(chunk *pChunk, bool handleEndianness)
+ {
+     if (source->bytesAvailable() < qint64(sizeof(chunk)))
+         return false;
+ 
+     source->peek(reinterpret_cast<char *>(pChunk), sizeof(chunk));
+-    if (bigEndian)
+-        pChunk->size = qFromBigEndian<quint32>(pChunk->size);
+-
++    if (handleEndianness) {
++        if (bigEndian)
++            pChunk->size = qFromBigEndian<quint32>(pChunk->size);
++        else
++            pChunk->size = qFromLittleEndian<quint32>(pChunk->size);
++    }
      return true;
  }
+ 
+--- a/src/multimedia/audio/qwavedecoder_p.h
++++ b/src/multimedia/audio/qwavedecoder_p.h
+@@ -103,7 +103,7 @@
+         char        id[4];
+         quint32     size;
+     };
+-    bool peekChunk(chunk* pChunk);
++    bool peekChunk(chunk* pChunk, bool handleEndianness = true);
+ 
+     struct RIFFHeader
+     {