diff --git a/src/AvTranscoder/DatasStructures/AudioDesc.cpp b/src/AvTranscoder/DatasStructures/AudioDesc.cpp
index 8cc5e63c..59199ea5 100644
--- a/src/AvTranscoder/DatasStructures/AudioDesc.cpp
+++ b/src/AvTranscoder/DatasStructures/AudioDesc.cpp
@@ -49,7 +49,7 @@ void AudioDesc::setAudioCodec( const AVCodecID codecId )
 	initCodecContext();
 }
 
-void AudioDesc::setAudioParameters( const size_t sampleRate, const size_t channels, const AVSampleFormat& sampleFormat )
+void AudioDesc::setAudioParameters( const size_t sampleRate, const size_t channels, const AVSampleFormat sampleFormat )
 {
 	m_codecContext->sample_rate = sampleRate;
 	m_codecContext->channels    = channels;
@@ -193,4 +193,21 @@ AVCodecID AudioDesc::getAudioCodecId() const
 	return m_codecContext->codec_id;
 }
 
+
+const size_t AudioDesc::getSampleRate() const
+{
+	return m_codecContext->sample_rate;
+}
+
+const size_t AudioDesc::getChannels() const
+{
+	return m_codecContext->channels;
+}
+
+const AVSampleFormat AudioDesc::getSampleFormat() const
+{
+	return m_codecContext->sample_fmt;
+}
+
+
 }
diff --git a/src/AvTranscoder/DatasStructures/AudioDesc.hpp b/src/AvTranscoder/DatasStructures/AudioDesc.hpp
index 98a04041..d06f25cc 100644
--- a/src/AvTranscoder/DatasStructures/AudioDesc.hpp
+++ b/src/AvTranscoder/DatasStructures/AudioDesc.hpp
@@ -27,7 +27,7 @@ class AvExport AudioDesc
 	void setAudioCodec( const std::string& codecName );
 	void setAudioCodec( const AVCodecID codecId );
 
-	void setAudioParameters( const size_t sampleRate, const size_t channels, const AVSampleFormat& sampleFormat );
+	void setAudioParameters( const size_t sampleRate, const size_t channels, const AVSampleFormat sampleFormat );
 
 	void set( const std::string& key, const std::string& flag, const bool enable );
 	void set( const std::string& key, const bool value );
@@ -38,6 +38,10 @@ class AvExport AudioDesc
 
 	std::string getAudioCodec()  const;
 	AVCodecID   getAudioCodecId()  const;
+	
+	const size_t getSampleRate() const;
+	const size_t getChannels() const;
+	const AVSampleFormat getSampleFormat() const;
 
 #ifndef SWIG
 	AVCodec*        getCodec()        const { return m_codec; }
diff --git a/src/AvTranscoder/InputStreamAudio.cpp b/src/AvTranscoder/InputStreamAudio.cpp
index 3e27d4b5..5919a8ce 100644
--- a/src/AvTranscoder/InputStreamAudio.cpp
+++ b/src/AvTranscoder/InputStreamAudio.cpp
@@ -39,6 +39,8 @@ InputStreamAudio::InputStreamAudio( const InputStream& inputStream )
 	{
 		throw std::runtime_error( "unable to find context for codec" );
 	}
+	
+	m_codecContext->channels = m_inputStream->getAudioDesc().getChannels();
 
 	std::cout << "Audio codec Id : " << m_codecContext->codec_id << std::endl;
 	std::cout << "Audio codec Id : " << m_codec->long_name << std::endl;