diff --git a/k9author/k9avidecode.cpp b/k9author/k9avidecode.cpp
index ec7b82d..731b1d3 100644
--- a/k9author/k9avidecode.cpp
+++ b/k9author/k9avidecode.cpp
@@ -119,6 +119,13 @@ k9AviDecode::k9AviDecode(TQObject *parent, const char *name)
     m_opened=false;
 
     glibref++;
+
+    m_FormatCtx = NULL;
+    m_CodecCtx = NULL;
+    m_Codec = NULL;
+    m_Frame = NULL;
+    m_FrameRGB = NULL;
+    m_buffer = NULL;
 }
 
 
@@ -148,7 +155,7 @@ bool k9AviDecode::open(const TQString & _fileName) {
     // Open video file
     if (
 #       if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(53, 2, 0)
-        avformat_open_input(&m_FormatCtx, _fileName.utf8(), 0, 0)!=0
+        avformat_open_input(&m_FormatCtx, _fileName.utf8(), NULL, NULL)!=0
 #       else
         av_open_input_file(&m_FormatCtx, _fileName.utf8(), NULL, 0, NULL)!=0
 #       endif