diff --git a/source/app/InputStream.cpp b/source/app/InputStream.cpp
index 5f1699f..ba9ea75 100755
--- a/source/app/InputStream.cpp
+++ b/source/app/InputStream.cpp
@@ -298,7 +298,7 @@ Void InputStream::getDuration( Int* duration_array )
   else
 #endif
   {
-    secs = m_uiTotalFrameNum * m_uiFrameRate;
+    secs = m_uiTotalFrameNum / m_uiFrameRate;
   }
   mins = secs / 60;
   secs %= 60;