diff --git a/src/AvTranscoder/DatasStructures/VideoDesc.hpp b/src/AvTranscoder/DatasStructures/VideoDesc.hpp
index 29ed08bb..0843998f 100644
--- a/src/AvTranscoder/DatasStructures/VideoDesc.hpp
+++ b/src/AvTranscoder/DatasStructures/VideoDesc.hpp
@@ -22,7 +22,7 @@ namespace avtranscoder
 class AvExport VideoDesc
 {
 public:
-	VideoDesc( const std::string& codecName = "" );
+	VideoDesc( const std::string& codecName );
 	VideoDesc( const AVCodecID codecId );
 
 	void setVideoCodec( const std::string& codecName );
diff --git a/src/AvTranscoder/InputStream.hpp b/src/AvTranscoder/InputStream.hpp
index 185d6d16..dd029e5e 100644
--- a/src/AvTranscoder/InputStream.hpp
+++ b/src/AvTranscoder/InputStream.hpp
@@ -42,6 +42,8 @@ class AvExport InputStream
 	double getDuration() const;
 	double getPacketDuration() const;
 
+	AVCodecID getVideoCodecId() const { return m_formatContext->streams[m_streamIndex]->codec->codec_id; }
+	
 // protected:
 	bool readNextPacket( AVPacket& packet ) const;
 
diff --git a/src/AvTranscoder/InputStreamVideo.cpp b/src/AvTranscoder/InputStreamVideo.cpp
index bc6a4107..b573a575 100644
--- a/src/AvTranscoder/InputStreamVideo.cpp
+++ b/src/AvTranscoder/InputStreamVideo.cpp
@@ -25,8 +25,8 @@ InputStreamVideo::InputStreamVideo( const InputStream& inputStream )
 	, m_selectedStream( -1 )
 {
 	av_register_all();
-
-	m_codec = avcodec_find_decoder( m_inputStream.getVideoDesc().getVideoCodecId() );
+	m_codec = avcodec_find_decoder( inputStream.getVideoCodecId() );
+	
 	if( m_codec == NULL )
 	{
 		throw std::runtime_error( "codec not supported" );