diff --git a/app/ModulesHandle.cpp b/app/ModulesHandle.cpp
index 86dbf2b..4e19ce7 100644
--- a/app/ModulesHandle.cpp
+++ b/app/ModulesHandle.cpp
@@ -282,7 +282,7 @@ Void ModulesHandle::enableModuleIf( PlaYUVerAppModuleIf *pcCurrModuleIf )
   }
   else
   {
-    windowName.append( pcVideoSubWindow->windowTitle() );
+    windowName.append( pcVideoSubWindow->getWindowName() );
     videoSubWindowList.append( pcVideoSubWindow );
   }
 
diff --git a/app/VideoSubWindow.cpp b/app/VideoSubWindow.cpp
index 5c0f72d..3e27fa2 100644
--- a/app/VideoSubWindow.cpp
+++ b/app/VideoSubWindow.cpp
@@ -518,7 +518,7 @@ Void VideoSubWindow::seekRelativeEvent( Bool bIsFoward )
 {
   if( m_pCurrStream )
   {
-    if( m_pCurrStream->seekInput( m_pCurrStream->getCurrFrameNum() + ( bIsFoward ? 1 : -1 ) ) )
+    if( m_pCurrStream->seekInputRelative( bIsFoward ) )
     {
       refreshFrame();
     }
diff --git a/lib/PlaYUVerStream.cpp b/lib/PlaYUVerStream.cpp
index b30012b..eb212e6 100644
--- a/lib/PlaYUVerStream.cpp
+++ b/lib/PlaYUVerStream.cpp
@@ -692,6 +692,25 @@ PlaYUVerFrame* PlaYUVerStream::getNextFrame()
   return m_pcNextFrame;
 }
 
+Bool PlaYUVerStream::seekInputRelative( Bool bIsFoward )
+{
+  if( !m_bInit || !m_bIsInput )
+    return false;
+
+  Bool bRet = false;
+  if( bIsFoward )
+  {
+    readFrame();
+    bRet = !setNextFrame();
+  }
+  else
+  {
+    UInt64 newFrameNum = m_iCurrFrameNum - 1;
+    bRet = seekInput( newFrameNum );
+  }
+  return bRet;
+}
+
 Bool PlaYUVerStream::seekInput( UInt64 new_frame_num )
 {
   if( !m_bInit || new_frame_num < 0 || new_frame_num >= m_uiTotalFrameNum || ( Int64 )new_frame_num == m_iCurrFrameNum )
diff --git a/lib/PlaYUVerStream.h b/lib/PlaYUVerStream.h
index 57906fc..a9429ab 100644
--- a/lib/PlaYUVerStream.h
+++ b/lib/PlaYUVerStream.h
@@ -77,7 +77,6 @@ private:
   std::string m_cCodedName;
   std::string m_cPelFmtName;
 
-
   FILE* m_pFile; /**< The input file pointer >*/
   std::fstream m_fsIOStream; /**< The input file pointer >*/
 
@@ -146,6 +145,7 @@ public:
   PlaYUVerFrame* getCurrFrame( PlaYUVerFrame * );
   PlaYUVerFrame* getNextFrame();
 
+  Bool seekInputRelative( Bool bIsFoward );
   Bool seekInput( UInt64 new_frame_num );
 
   Bool isInit()