This time, it should work. (No really, I mean it !)

src/Workflow/ClipWorkflow.cpp

@@ -93,7 +93,7 @@ void    ClipWorkflow::lock( ClipWorkflow* cw, void** pp_ret )
 //    else
 //    {
         *pp_ret = cw->m_buffer;
-        qDebug() << "Clip workflow locking <<<<<<<<<<<<<<<<<<<<<<<<<<";
+//        qDebug() << "Clip workflow locking <<<<<<<<<<<<<<<<<<<<<<<<<<";
 //    }
 }
 

src/Workflow/MainWorkflow.cpp

@@ -127,7 +127,7 @@ void        MainWorkflow::pause()
 {
     QMutexLocker    lock( m_renderMutex );
 
-    qDebug() << "Pausing.......................";
+    qDebug() << "MainWorkflow Pausing Started >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n\n";
     m_nbTracksToPause = 0;
     for ( unsigned int i = 0; i < m_trackCount; ++i )
     {
@@ -137,7 +137,7 @@ void        MainWorkflow::pause()
             m_tracks[i]->pause();
         }
     }
-    qDebug() << "Pausing completed <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n\n";
+    qDebug() << "MainWorkflow Pausing asked completed <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n\n";
 }
 
 void        MainWorkflow::nextFrame()

src/Workflow/TrackWorkflow.cpp

@@ -342,13 +342,13 @@ void            TrackWorkflow::pauseClipWorkflow( ClipWorkflow* cw )
          cw->getState() == ClipWorkflow::EndReached )
     {
         qDebug() << "Pausing a sleeping, ready or EndReached ClipWorkflow, state =" << cw->getState();
-        qDebug() << "getting condwait lock";
-        cw->getSleepMutex()->lock();
-        cw->queryStateChange( ClipWorkflow::Pausing );
-        cw->getStateLock()->unlock();
         qDebug() << "Unlocked state mutex";
-        qDebug() << "Realeasing condwait lock";
-        cw->getSleepMutex()->unlock();
+        cw->getStateLock()->unlock();
+
+        qDebug() << "Waiting for sleep mutex";
+        QMutexLocker    lock( cw->getSleepMutex() );
+        qDebug() << "Got sleep mutex";
+        cw->queryStateChange( ClipWorkflow::Pausing );
         cw->wake();
     }
     else if ( cw->getState() == ClipWorkflow::Rendering )
@@ -415,6 +415,7 @@ void                TrackWorkflow::pause()
             //This should never be used.
             //TODO: remove this in a few revision (wrote on July 16 2009 )
             qDebug() << "Asking to pause in an already paused state";
+            cw->getStateLock()->unlock();
         }
     }
     qDebug() << "End of loop";

src/renderer/WorkflowRenderer.cpp

@@ -29,7 +29,8 @@
 
 WorkflowRenderer::WorkflowRenderer( MainWorkflow* mainWorkflow ) :
             m_mainWorkflow( mainWorkflow ),
-            m_framePlayed( false )
+            m_framePlayed( false ),
+            m_pauseAsked( false )
 {
     m_actionsLock = new QReadWriteLock;
     m_media = new LibVLCpp::Media( "fake://" );
@@ -126,6 +127,9 @@ void        WorkflowRenderer::checkActions()
         {
             case    Pause:
                 qDebug() << "Pausing WorkflowRenderer mediaPlayer";
+                if ( m_pauseAsked == true )
+                    continue ;
+                m_pauseAsked = true;
                 m_mediaPlayer->pause();
                 //This will also pause the MainWorkflow via a signal/slot
                 break ;
@@ -186,12 +190,16 @@ void        WorkflowRenderer::previousFrame()
 void        WorkflowRenderer::pauseMainWorkflow()
 {
     qDebug() << "In pause callback";
+    if ( m_paused == true )
+        return ;
     m_mainWorkflow->pause();
 }
 
 void        WorkflowRenderer::mainWorkflowPaused()
 {
+    qDebug() << "MAIN WORKFLOW PAUSED<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<";
     m_paused = true;
+    m_pauseAsked = false;
     emit paused();
 }
 

src/renderer/WorkflowRenderer.h

@@ -77,6 +77,7 @@ class   WorkflowRenderer : public GenericRenderer
         bool                m_framePlayed;
         QStack<Actions>     m_actions;
         QReadWriteLock*     m_actionsLock;
+        bool                m_pauseAsked;
 
     public slots:
         void                mainWorkflowPaused();