采样率为16000，采样率为44100的MP3格式.Mp3filereader不支持采样率变化

问题描述

Mark

我遇到了NAudio的问题，当我使用下面的代码获取MP3文件时，

流stream = new MemoryStream（bytes）;

var mp3Reader = new Mp3FileReader（stream）;

Mp3FileReader抛出异常：

Hi,Mark
I meet with an issue for NAudio, when I used below codes for MP3file,
Stream stream = new MemoryStream(bytes);
var mp3Reader = new Mp3FileReader(stream);
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

你能告诉我我做错了吗？谢谢。



祝你好运！



Jeff Jiang



我尝试过：



使用（WaveStream reader = new Mp3FileReader（inputStream））

using（var temp = new LameMP3FileWriter（tempStream，reader.WaveFormat，LAMEPreset.STANDARD））

{

reader.CopyTo（tempStream）;

}



var mp3Reader = new Mp3FileReader（tempStream）;

最后一段代码显示此错误消息：

Could you tell me where I am doing wrong? thanks.

Best regards!

Jeff Jiang

What I have tried:

using (WaveStream reader = new Mp3FileReader(inputStream))
using (var temp = new LameMP3FileWriter(tempStream, reader.WaveFormat, LAMEPreset.STANDARD))
{
reader.CopyTo(tempStream);
}

var mp3Reader = new Mp3FileReader(tempStream);
The last code show this error message:

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

我看到这篇文章如何转换（大多数） .NET中的音频格式，但我没有找到问题的解决方案。

我发现一个奇怪的问题：



var testStream = new Mp3FileReader（inputStream）;



var outStream = new Mp3FileReader（ testStream）;



最后一个代码会显示此错误。为什么？

I saw this article"How to convert between (most) audio formats in .NET", but I didn't find the solution for the issue.
I find a strange issue:

var testStream = new Mp3FileReader(inputStream);

var outStream = new Mp3FileReader(testStream);

the last code will show this error. why?

推荐答案

public class MyMp3FileReader : WaveStream

这里特别修改

and here modify especally

private void ValidateFrameFormat(Mp3Frame frame)

此外，您最需要可能还要实现自己的 IMp3FrameDecompressor 和 A cmStream 。



无论如何，这一切都意味着你必须深入研究MP3和ACM（音频压缩管理器）。这真的是一个不错的领域，值得。



对不起，没有最终的解决方案。

我希望它有点帮助位，祝你好运

Furthermore you need most probably also to implement your own IMp3FrameDecompressor and AcmStream.

Anyway, all this means you have to dive something deep into MP3 and ACM (Audio Compression Manager). It is really a nice field and it is worth it.

Sorry, not to have a final solution.
I hope it helps little bit, good luck

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