NAudio does not support VBR(Got a frame at sample rate 16000, in an MP3 with sample rate 44100. Mp3FileReader does not support sample rate changes)

My requirement is “change the channel as 1, bitrate as 32kbps and splite the time span the mp3 file as 2 minuts”.

 public static Stream ProcessAudioStream(Stream inputStream)
        {
            Stream fs = new MemoryStream();
            Stream outputStream = new MemoryStream();           
            try
            {                

                Stream tempStream = new MemoryStream(); 

                using (var waveStream = new Mp3FileReader(inputStream))
                using (WaveFileWriter waveFileWriter = new WaveFileWriter(tempStream, new Mp3WaveFormat(44100,1,8,32000)))
                {
                    byte[] bytes = new byte[waveStream.Length];
                    waveStream.Read(bytes, 0, (int)waveStream.Length);
                    waveFileWriter.Write(bytes, 0, bytes.Length);
                    waveFileWriter.Flush();
                    fs = BytesToStream(bytes);
                }
                fs.Position = 0;

                using (var mp3 = new Mp3FileReader(fs))
                //Got a frame at sample rate 16000, in an MP3 with sample rate 44100. Mp3FileReader does not support sample rate changes
                {
                    Mp3Frame frame;
                    while ((frame = mp3.ReadNextFrame()) != null)
                    {
                        if ((int)mp3.CurrentTime.TotalSeconds <= 120)//2 mintues
                        {
                            `outputStream.Write(frame.RawData,` 0, frame.RawData.Length);
                        }
                    }
                }
           }
            catch (Exception e)
            {
                string msg = e.Message;

            }
            return outputStream;
        }

Mp3FileReader is throwing an exception: Got a frame at sample rate 16000, in an MP3 with sample rate 44100. Mp3FileReader does not support sample rate changes.

Would someone give me some suggestions for this error? thanks In additions, you can click below url to download my source code. Use VS2015 to open the project, thanks. https://pan.baidu.com/s/1qYiEqle

My email is [e-mail] Let me know if you have any comments for this error.

[markheath]

You don’t need the WaveFormatConversionStream - the StreamMediaFoundationReader will already emit PCM

[RSDNTWK]

Bug is caused by artwork being present in the ID3 Tags. We will open a separate issue.