从WAV格式改变为MP3在n音讯内存流 [英] change format from wav to mp3 in memory stream in NAudio

问题描述

您好IAM试图文字转换为语音（WAV）中的MemoryStream它转换成MP3，然后发挥它的用户page.so需要我帮助下一步做什么？

Hi there iam trying to convert text to speech (wav) in the memorystream convert it to mp3 and then play it on the users page.so need i help what to do next?

这是我的ASMX code：

here is my asmx code :

[WebMethod]
public byte[] StartSpeak(string Word)
{
    MemoryStream ms = new MemoryStream();
    using (System.Speech.Synthesis.SpeechSynthesizer synhesizer = new System.Speech.Synthesis.SpeechSynthesizer())
    {
        synhesizer.SelectVoiceByHints(System.Speech.Synthesis.VoiceGender.NotSet, System.Speech.Synthesis.VoiceAge.NotSet, 0, new System.Globalization.CultureInfo("en-US"));
        synhesizer.SetOutputToWaveStream(ms);
        synhesizer.Speak(Word);
    }
    return ms.ToArray();

    }

感谢。

推荐答案

您需要一个MP3 COM pressor库。我通过雪人拉梅包装使用跛脚。你可以在这里找到 code和示例项目。

You need an MP3 compressor library. I use Lame via the Yeti Lame wrapper. You can find code and a sample project here.

步骤得到这个工作：

1. 从 MP3Com pressor ​​将以下文件复制到您的项目：

1. Copy the following files from MP3Compressor to your project:

• AudioWriters.cs


• Lame.cs


• Lame_enc.dll


• Mp3Writer.cs


• Mp3WriterConfig.cs


• WaveNative.cs


• WriterConfig.cs

在 Lame_enc.dll 设置复制到输出属性<$ C项目属性$ C>复制如果新或复制总是。

修改 Lame.cs 和替换的所有实例：

Edit Lame.cs and replace all instances of:

[DllImport("Lame_enc.dll")]

与

[DllImport("Lame_enc.dll", CallingConvention = CallingConvention.Cdecl)]`

添加以下code到项目：

Add the following code to your project:

public static Byte[] WavToMP3(byte[] wavFile)
{
    using (MemoryStream source = new MemoryStream(wavFile))
    using (NAudio.Wave.WaveFileReader rdr = new NAudio.Wave.WaveFileReader(source))
    {
        WaveLib.WaveFormat fmt = new WaveLib.WaveFormat(rdr.WaveFormat.SampleRate, rdr.WaveFormat.BitsPerSample, rdr.WaveFormat.Channels);

        // convert to MP3 at 96kbit/sec...
        Yeti.Lame.BE_CONFIG conf = new Yeti.Lame.BE_CONFIG(fmt, 96);

        // Allocate a 1-second buffer
        int blen = rdr.WaveFormat.AverageBytesPerSecond;
        byte[] buffer = new byte[blen];

        // Do conversion
        using (MemoryStream output = new MemoryStream())
        { 
            Yeti.MMedia.Mp3.Mp3Writer mp3 = new Yeti.MMedia.Mp3.Mp3Writer(output, fmt, conf);

            int readCount;
            while ((readCount = rdr.Read(buffer, 0, blen)) > 0)
                mp3.Write(buffer, 0, readCount);

            mp3.Close();
            return output.ToArray();
        }
    }
}

无论是添加到 System.Windows.Forms的引用到您的项目（如果它不存在的话），或编辑 AudioWriter。 CS 和 WriterConfig.cs 来删除引用。这两个有一个使用System.Windows.Forms的; 您可以删除，而 WriterConfig.cs 有一个 ConfigControl 声明，需要删除/注释掉。

Either add a reference to System.Windows.Forms to your project (if it's not there already), or edit AudioWriter.cs and WriterConfig.cs to remove the references. Both of these have a using System.Windows.Forms; that you can remove, and WriterConfig.cs has a ConfigControl declaration that needs to be removed/commented out.

一旦所有做到这一点，你应该有一个功能在内存波文件，您可以使用到您从 SpeechSynthesizer 成MP3。

Once all of that is done you should have a functional in-memory wave-file to MP3 converter that you can use to convert the WAV file that you are getting from the SpeechSynthesizer into an MP3.

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