diff --git a/source/app/SubWindowHandle.cpp b/source/app/SubWindowHandle.cpp
index 6125d6d..87f91a4 100644
--- a/source/app/SubWindowHandle.cpp
+++ b/source/app/SubWindowHandle.cpp
@@ -303,8 +303,10 @@ Void SubWindowHandle::seekAbsoluteEvent( UInt new_frame_num )
 {
   if( m_pCurrStream )
   {
-    m_pCurrStream->seekInput( new_frame_num );
-    refreshFrame();
+    if( m_pCurrStream->seekInput( new_frame_num ) )
+    {
+      refreshFrame();
+    }
   }
 }
 
@@ -312,8 +314,10 @@ Void SubWindowHandle::seekRelativeEvent( Bool bIsFoward )
 {
   if( m_pCurrStream )
   {
-    m_pCurrStream->seekInput( m_pCurrStream->getCurrFrameNum() + ( bIsFoward ? 1 : -1 ) );
-    refreshFrame();
+    if( m_pCurrStream->seekInput( m_pCurrStream->getCurrFrameNum() + ( bIsFoward ? 1 : -1 ) ) )
+    {
+      refreshFrame();
+    }
   }
 }
 
diff --git a/source/lib/PlaYUVerStream.cpp b/source/lib/PlaYUVerStream.cpp
index 0a68b19..8d06d41 100644
--- a/source/lib/PlaYUVerStream.cpp
+++ b/source/lib/PlaYUVerStream.cpp
@@ -644,10 +644,10 @@ PlaYUVerFrame* PlaYUVerStream::getCurrFrame()
   return m_pcCurrFrame;
 }
 
-Void PlaYUVerStream::seekInput( UInt64 new_frame_num )
+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 )
-    return;
+    return false;
 
   m_iCurrFrameNum = new_frame_num - 1;
 
@@ -656,7 +656,7 @@ Void PlaYUVerStream::seekInput( UInt64 new_frame_num )
     m_uiFrameBufferIndex = new_frame_num;
     m_pcNextFrame = m_ppcFrameBuffer[m_uiFrameBufferIndex];
     setNextFrame();
-    return;
+    return true;
   }
 #ifdef USE_FFMPEG
   if( m_cLibAvContext->getStatus() )
@@ -677,6 +677,7 @@ Void PlaYUVerStream::seekInput( UInt64 new_frame_num )
   setNextFrame();
   if( m_uiTotalFrameNum > 1 )
     readFrame();
+  return true;
 }
 
 Bool PlaYUVerStream::checkErrors( Int error_type )
diff --git a/source/lib/PlaYUVerStream.h b/source/lib/PlaYUVerStream.h
index 072da79..60f2f2b 100644
--- a/source/lib/PlaYUVerStream.h
+++ b/source/lib/PlaYUVerStream.h
@@ -253,7 +253,7 @@ public:
   PlaYUVerFrame* getCurrFrame();
   PlaYUVerFrame* getCurrFrame( PlaYUVerFrame * );
 
-  Void seekInput( UInt64 new_frame_num );
+  Bool seekInput( UInt64 new_frame_num );
 
   Bool checkErrors( Int error_type );