From Riccardo Corsi, "in attach you'll find a patch to cleanup a little bit the (de)initialization code of QuickTime environment from the quickTime pluging.

It basically removes the static init() and exit() functions,and move them inside the observer class (the one that cleans everything up when the last media is unloaded).

It also add an extra check to clean up on exit if the QuickTime env is initialized, but no media is succesfully loaded / written (it might happens with streaming resources).

I tested it under WinXP with zero, one and multiple videos.

Stephan reads in copy: could you kindly check if everything runs smooth under OSX as well? Also, have you got a chance to test it with streaming media?
"

src/osgPlugins/quicktime/QTImportExport.cpp

@@ -34,7 +34,6 @@ QuicktimeImportExport::QuicktimeImportExport()
 :    _error(0), 
     _lastError("")
 {
-    initQuicktime();
 }
 
 

src/osgPlugins/quicktime/QTUtils.cpp

@@ -16,81 +16,6 @@
 using namespace std;
 
 
-
-    class QuicktimeInitializer : public osg::Referenced {
-        public:
-            QuicktimeInitializer() :osg::Referenced() {
-               
-                 #ifndef __APPLE__
-                     InitializeQTML(0);
-                 #endif
-                 OSErr err = EnterMovies();
-                 if (err!=0)
-                    osg::notify(osg::FATAL) << "Error while initializing quicktime: " << err << endl; 
-                 else
-                    osg::notify(osg::DEBUG_INFO) << "Quicktime initialized successfully"  << endl;
-
-                 static bool registered = false;
-
-                 if (!registered){
-                     registerQTReader(); 
-                     registered = true;    
-                 }                 
-            }
-            
-            ~QuicktimeInitializer() {
-                #ifndef __APPLE__
-                    ExitMovies();
-                #endif
-                //osg::notify(osg::DEBUG_INFO) << "Quicktime deinitialized successfully"  << endl;
-            }
-
-    protected:
-        void registerQTReader() {
-            osgDB::Registry* r = osgDB::Registry::instance();
-         r->addFileExtensionAlias("mov",  "qt");
-
-         #ifdef QT_HANDLE_IMAGES_ALSO
-            r->addFileExtensionAlias("jpg",  "qt");
-            r->addFileExtensionAlias("jpe",  "qt");
-            r->addFileExtensionAlias("jpeg", "qt");
-            r->addFileExtensionAlias("tif",  "qt");
-            r->addFileExtensionAlias("tiff", "qt");
-            r->addFileExtensionAlias("gif",  "qt");
-            r->addFileExtensionAlias("png",  "qt");
-            r->addFileExtensionAlias("psd",  "qt");
-            r->addFileExtensionAlias("tga",  "qt");
-            r->addFileExtensionAlias("mov",  "qt");
-            r->addFileExtensionAlias("avi",  "qt");
-            r->addFileExtensionAlias("mpg",  "qt");
-            r->addFileExtensionAlias("mpv",  "qt");
-            r->addFileExtensionAlias("dv",   "qt");
-            r->addFileExtensionAlias("mp4",  "qt");
-            r->addFileExtensionAlias("m4v",  "qt");         
-         #endif
-        }
-                
-    };
-    
-    void initQuicktime(bool erase) {
-
-        static osg::ref_ptr<QuicktimeInitializer> s_qt_init = new QuicktimeInitializer();
-        if (erase) {
-            s_qt_init = NULL;
-        } else if (!s_qt_init.valid())
-        {
-            s_qt_init = new QuicktimeInitializer();
-        }
-    }
-
-    
-    void exitQuicktime() {
-        initQuicktime(true);
-    }
-
-
-    
-
     // ---------------------------------------------------------------------------
     // MakeFSSPecFromPath
     // wandelt einen Posix-Pfad in ein FSSpec um.

src/osgPlugins/quicktime/QTUtils.h

@@ -50,16 +50,6 @@
 
 #endif
     
-
-    /**
-     * inits Quicktime, if erase = true, the Quicktime-stuff gets cleaned, call it before your app exits
-     * @param erase true, if you want to cleanup quicktime-related stuff
-     */
-    void initQuicktime(bool erase = false);
-    
-    /** cleans up all quicktime-related stuff */
-    void exitQuicktime();
-    
     /** constructs an FSSpec out of an path */
      OSStatus MakeFSSpecFromPath(const char* path, FSSpec* spec);
     

src/osgPlugins/quicktime/ReaderWriterQT.cpp

@@ -36,20 +36,36 @@
 
 using namespace osg;
 
-// This class is used as a helper to de-initialize
+
-// properly quicktime, when the last media loaded 
+class ReaderWriterQT : public osgDB::ReaderWriter
-// with the quicktime plugin is released. 
-// All loaded media must be added to the observer 
-// (see ReaderWriterQT::readImage() function) 
-class QuicktimeExitObserver : public osg::Observer
 {
 public:
 
-   QuicktimeExitObserver () : _instanceCount(0)
+
+    // This class is used as a helper to de-initialize
+    // properly quicktime, when the last media loaded 
+    // with the quicktime plugin is released. 
+    // All loaded media must be added to the observer 
+    // (see ReaderWriterQT::readImage() function) 
+    class QuicktimeInitializer : public osg::Observer
     {
+    public:
+
+       QuicktimeInitializer (): 
+          _instanceCount(0),
+             _setup(false)
+          {}
+
+          virtual ~QuicktimeInitializer()
+          {
+             // When we get here, the exit() function 
+             // should have been called, when last media was released. 
+             // In case no media has been added after initialization, 
+             // let's perform an extra check
+             if (_setup && _instanceCount == 0)
+             {
+                exit();
              }
-   virtual ~QuicktimeExitObserver()
-   {
           };
 
           void addMedia(Image* ptr)
@@ -62,20 +78,52 @@ public:
           {
              -- _instanceCount;
              if(_instanceCount== 0)
-         exitQuicktime();
+                exit();
           }
 
-private:
+          void init()
+          {
+             if (!_setup)
+             {
+                #ifndef __APPLE__
+                InitializeQTML(0);
+                #endif
+
+                OSErr err = EnterMovies();
+                if (err!=0)
+                   osg::notify(osg::FATAL) << "Error while initializing quicktime: " << err << std::endl; 
+                else
+                   osg::notify(osg::DEBUG_INFO) << "Quicktime initialized successfully"  << std::endl;            
+
+                _setup = true;            
+             }
+          }
+
+          void exit()
+          {
+             #ifndef __APPLE__
+             ExitMovies();
+             #endif
+
+             _setup = false;
+          }
+
+    private:
        unsigned int _instanceCount;
-};
+       bool _setup;
+
+    };
+
+
 
 
 
-class ReaderWriterQT : public osgDB::ReaderWriter
-{
-public:
     ReaderWriterQT::ReaderWriterQT()
     {
+
+       registerQtReader();
+
+
         supportsExtension("mov","Movie format");
         supportsExtension("mpg","Movie format");
         supportsExtension("mpv","Movie format");
@@ -228,8 +276,9 @@ public:
                   // Quicktime initialization is done here, when a media is found
                   // and before any image or movie is loaded. 
                   // After the first call the function does nothing. 
-                  // The cleaning up is left to the QuicktimeExitObserver (see below)
+                  // The cleaning up is left to the QuicktimeInitializer (see below)
-                  initQuicktime();
+                  _qtExitObserver.init();
+
                   //
                   QuicktimeLiveImageStream* p_qt_image_stream = new QuicktimeLiveImageStream(osgDB::getNameLessExtension(file));
                   // add the media to the observer for proper clean up on exit
@@ -252,8 +301,8 @@ public:
       // Quicktime initialization is done here, when a media is found
       // and before any image or movie is loaded. 
       // After the first call the function does nothing. 
-      // The cleaning up is left to the QuicktimeExitObserver (see below)
+      // The cleaning up is left to the QuicktimeInitializer (see below)
-      initQuicktime();
+      _qtExitObserver.init();
 
 
       // if the file is a movie file then load as an ImageStream.
@@ -317,6 +366,8 @@ public:
             }
         }
 
+        _qtExitObserver.init();
+        
         QuicktimeImportExport importer;
         osg::ref_ptr<osg::Image> image = importer.readFromStream(is, filename, sizeHint);
         
@@ -334,7 +385,7 @@ public:
         std::string ext = osgDB::getFileExtension(fileName);
         if (!acceptsExtension(ext)) return WriteResult::FILE_NOT_HANDLED;
 
-        initQuicktime();
+        _qtExitObserver.init();
 
         //Buidl map  of extension <-> osFileTypes
         std::map<std::string, OSType> extmap;
@@ -386,6 +437,8 @@ public:
             }
         }
         
+        _qtExitObserver.init();
+
         QuicktimeImportExport exporter;
         exporter.writeToStream(os, const_cast<osg::Image*>(&img), filename);
             
@@ -395,8 +448,35 @@ public:
         return WriteResult::ERROR_IN_WRITING_FILE;         
     }
 
+protected:
 
-    mutable QuicktimeExitObserver _qtExitObserver;
+   //internal utils
+   void registerQtReader() const
+   {
+      osgDB::Registry* r = osgDB::Registry::instance();
+      r->addFileExtensionAlias("mov",  "qt");
+
+      #ifdef QT_HANDLE_IMAGES_ALSO
+      r->addFileExtensionAlias("jpg",  "qt");
+      r->addFileExtensionAlias("jpe",  "qt");
+      r->addFileExtensionAlias("jpeg", "qt");
+      r->addFileExtensionAlias("tif",  "qt");
+      r->addFileExtensionAlias("tiff", "qt");
+      r->addFileExtensionAlias("gif",  "qt");
+      r->addFileExtensionAlias("png",  "qt");
+      r->addFileExtensionAlias("psd",  "qt");
+      r->addFileExtensionAlias("tga",  "qt");
+      r->addFileExtensionAlias("mov",  "qt");
+      r->addFileExtensionAlias("avi",  "qt");
+      r->addFileExtensionAlias("mpg",  "qt");
+      r->addFileExtensionAlias("mpv",  "qt");
+      r->addFileExtensionAlias("dv",   "qt");
+      r->addFileExtensionAlias("mp4",  "qt");
+      r->addFileExtensionAlias("m4v",  "qt");         
+      #endif
+   }
+
+    mutable QuicktimeInitializer _qtExitObserver;
 };
 
 // now register with Registry to instantiate the above