diff --git a/source/app/ModulesHandle.cpp b/source/app/ModulesHandle.cpp
index d94706c..509bc70 100644
--- a/source/app/ModulesHandle.cpp
+++ b/source/app/ModulesHandle.cpp
@@ -106,7 +106,7 @@ SubWindowHandle* ModulesHandle::enableModuleIf( PlaYUVerModuleIf *pcCurrModuleIf
           subWindow = qobject_cast<SubWindowHandle *>( m_pcMdiArea->subWindowList().at( i ) );
           if( subWindow->getWindowName() == selectedWindows.at( j ) )
           {
-            pcCurrModuleIf->m_pcSubWindow[j++] = subWindow;
+            pcCurrModuleIf->m_pcSubWindow[j] = subWindow;
           }
         }
       }
@@ -176,31 +176,38 @@ Void ModulesHandle::destroyAllModulesIf()
   }
 }
 
-Bool ModulesHandle::applyModuleIf( PlaYUVerModuleIf *pcCurrModuleIf )
+Bool ModulesHandle::applyModuleIf( PlaYUVerModuleIf *pcCurrModuleIf, Bool isPlaying )
 {
   PlaYUVerFrame* processedFrame = NULL;
   Bool bRet = false;
-  switch( pcCurrModuleIf->m_cModuleDef.m_uiNumberOfFrames )
+  if( !isPlaying || ( isPlaying && pcCurrModuleIf->m_cModuleDef.m_bApplyWhilePlaying ) )
   {
-  case MODULE_REQUIRES_ONE_FRAME:
-    processedFrame = pcCurrModuleIf->process( pcCurrModuleIf->m_pcSubWindow[0]->getCurrFrame() );
-    break;
-  case MODULE_REQUIRES_TWO_FRAMES:
-    processedFrame = pcCurrModuleIf->process( pcCurrModuleIf->m_pcSubWindow[0]->getCurrFrame(), pcCurrModuleIf->m_pcSubWindow[1]->getCurrFrame() );
-    break;
-  case MODULE_REQUIRES_THREE_FRAMES:
-    processedFrame = pcCurrModuleIf->process( pcCurrModuleIf->m_pcSubWindow[0]->getCurrFrame(), pcCurrModuleIf->m_pcSubWindow[1]->getCurrFrame(),
-        pcCurrModuleIf->m_pcSubWindow[2]->getCurrFrame() );
-    break;
-  }
-  if( pcCurrModuleIf->m_pcDisplaySubWindow )
-  {
-    pcCurrModuleIf->m_pcDisplaySubWindow->setCurrFrame( processedFrame );
-    bRet = true;
+    switch( pcCurrModuleIf->m_cModuleDef.m_uiNumberOfFrames )
+    {
+    case MODULE_REQUIRES_ONE_FRAME:
+      processedFrame = pcCurrModuleIf->process( pcCurrModuleIf->m_pcSubWindow[0]->getCurrFrame() );
+      break;
+    case MODULE_REQUIRES_TWO_FRAMES:
+      processedFrame = pcCurrModuleIf->process( pcCurrModuleIf->m_pcSubWindow[0]->getCurrFrame(), pcCurrModuleIf->m_pcSubWindow[1]->getCurrFrame() );
+      break;
+    case MODULE_REQUIRES_THREE_FRAMES:
+      processedFrame = pcCurrModuleIf->process( pcCurrModuleIf->m_pcSubWindow[0]->getCurrFrame(), pcCurrModuleIf->m_pcSubWindow[1]->getCurrFrame(),
+          pcCurrModuleIf->m_pcSubWindow[2]->getCurrFrame() );
+      break;
+    }
+    if( pcCurrModuleIf->m_pcDisplaySubWindow )
+    {
+      pcCurrModuleIf->m_pcDisplaySubWindow->setCurrFrame( processedFrame );
+      bRet = true;
+    }
+    else
+    {
+      pcCurrModuleIf->m_pcSubWindow[0]->setCurrFrame( processedFrame );
+    }
   }
   else
   {
-    pcCurrModuleIf->m_pcSubWindow[0]->setCurrFrame( processedFrame );
+    bRet = true;
   }
   return bRet;
 }
diff --git a/source/app/ModulesHandle.h b/source/app/ModulesHandle.h
index 5ed1746..c1a19c5 100644
--- a/source/app/ModulesHandle.h
+++ b/source/app/ModulesHandle.h
@@ -55,7 +55,7 @@ public:
   Void updateMenus( Bool hasSubWindow );
   SubWindowHandle* toggleSelectedModuleIf();
 
-  static Bool applyModuleIf( PlaYUVerModuleIf* pcCurrModuleIf );
+  static Bool applyModuleIf( PlaYUVerModuleIf* pcCurrModuleIf, Bool isPlaying = false );
   static Void destroyModuleIf( PlaYUVerModuleIf* pcCurrModuleIf );
 
 private:
diff --git a/source/app/PlaYUVerModuleIf.h b/source/app/PlaYUVerModuleIf.h
index 5e6b475..7e55663 100644
--- a/source/app/PlaYUVerModuleIf.h
+++ b/source/app/PlaYUVerModuleIf.h
@@ -48,11 +48,17 @@ enum __PlaYUVerModuleTypes
 #define APPLY_WHILE_PLAYING true
 #define MAX_NUMBER_FRAMES 3
 
-enum __PlaYUVerModuleRequirements
+enum __PlaYUVerModuleNumberOfFrames
 {
+  // Number of frames
   MODULE_REQUIRES_ONE_FRAME = 1,
   MODULE_REQUIRES_TWO_FRAMES = 2,
   MODULE_REQUIRES_THREE_FRAMES = 3,
+};
+
+enum __PlaYUVerModuleRequirements
+{
+  // Requirements
   MODULE_REQUIRES_NOTHING = 0,
   MODULE_REQUIRES_NEW_WINDOW = 2,
   MODULE_REQUIRES_SIDEBAR = 4,
diff --git a/source/app/SubWindowHandle.cpp b/source/app/SubWindowHandle.cpp
index bded3e4..d41f674 100644
--- a/source/app/SubWindowHandle.cpp
+++ b/source/app/SubWindowHandle.cpp
@@ -149,7 +149,7 @@ Void SubWindowHandle::refreshFrame()
     m_pcCurrFrame = m_pCurrStream->getCurrFrame();
     if( m_pcCurrentModule )
     {
-      bSetFrame = ModulesHandle::applyModuleIf( m_pcCurrentModule );
+      bSetFrame = ModulesHandle::applyModuleIf( m_pcCurrentModule, m_bIsPlaying );
     }
     if( bSetFrame )
     {
@@ -216,7 +216,7 @@ Int SubWindowHandle::playEvent()
 Void SubWindowHandle::pause()
 {
   m_bIsPlaying = false;
-  return;
+  refreshFrame();
 }
 
 Void SubWindowHandle::seekAbsoluteEvent( UInt new_frame_num )
diff --git a/source/modules/FilterFrame.cpp b/source/modules/FilterFrame.cpp
index 32edadb..53bc220 100644
--- a/source/modules/FilterFrame.cpp
+++ b/source/modules/FilterFrame.cpp
@@ -31,13 +31,15 @@ namespace plaYUVer
 {
 
 PlaYUVerModuleDefinition FilterFrameDef = {
-    FRAME_LEVEL_MODULE,
-    "Filters",
-    "Y_Filter",
-    "Filter Y matrix of YUV frame",
-    MODULE_REQUIRES_ONE_FRAME,
-    MODULE_REQUIRES_NOTHING,
-    APPLY_WHILE_PLAYING,
+    FRAME_LEVEL_MODULE,             // Apply module to the frames or to the whole sequence.
+                                    // Currently only support for frame
+    "Filters",                      // Category (sub-menu)
+    "Y_Filter",                     // Name
+    "Filter Y matrix of YUV frame", // Description
+    MODULE_REQUIRES_ONE_FRAME,      // Number of Frames required (ONE_FRAME, TWO_FRAMES, THREE_FRAMES)
+    MODULE_REQUIRES_NOTHING,        // Module requirements (check PlaYUVerModulesIf.h).
+                                    // Several requirements should be "or" between each others.
+    APPLY_WHILE_PLAYING,            // Apply module while playing
 };
 
 FilterFrame::FilterFrame()