@@ -297,20 +297,28 @@ StreamTranscoder::StreamTranscoder(const std::vector<InputStreamDesc>& inputStre
297297 _filterGraph->addFilter (" amerge" str ());
298298 }
299299
300- AudioCodecaudioCodec (_outputEncoder->getCodec ().getCodecType (), _outputEncoder->getCodec ().getCodecId ());
301- AudioFrameDescaudioFrameDesc (48000 ,1 ," s32"
302- audioCodec.setAudioParameters (audioFrameDesc);
300+ AudioFrameDescinputFrameDesc (inputStream.getAudioCodec ().getAudioFrameDesc ());
303301
304302// output stream
305- _outputStream = &outputFile.addAudioStream (audioCodec);
303+ AudioCodecoutputAudioCodec (_outputEncoder->getCodec ().getCodecType (), _outputEncoder->getCodec ().getCodecId ());
304+ AudioFrameDesc outputAudioFrameDesc = outputAudioCodec.getAudioFrameDesc ();
305+ if (outputAudioFrameDesc._sampleRate ==0 ) {
306+ outputAudioFrameDesc._sampleRate = inputFrameDesc._sampleRate ;
307+ }
308+ if (outputAudioFrameDesc._sampleFormat == AV_SAMPLE_FMT_NONE) {
309+ outputAudioFrameDesc._sampleFormat = inputFrameDesc._sampleFormat ;
310+ }
311+ outputAudioFrameDesc._nbChannels = nbOutputChannels;
312+ outputAudioCodec.setAudioParameters (outputAudioFrameDesc);
313+
314+ _outputStream = &outputFile.addAudioStream (outputAudioCodec);
306315
307316// buffers to process
308- AudioFrameDescinputFrameDesc (inputStream.getAudioCodec ().getAudioFrameDesc ());
309317if (inputStreamDesc.demultiplexing ())
310318 inputFrameDesc._nbChannels = nbOutputChannels;
311319
312320 _filteredData =new AudioFrame (inputFrameDesc);
313- _transformedData =new AudioFrame (audioFrameDesc );
321+ _transformedData =new AudioFrame (outputAudioFrameDesc );
314322
315323// transform
316324 _transform =new AudioTransform ();