在C＃中播放声音的一部分（WMA）文件 [英] Playing part of a sound (WMA) file in C#

问题描述

我有一个包含许多不同的音频部分的单个WMA文件。
有没有什么办法可以播放声音流的一部分？

是这样的：

 公共静态无效播放（流SOUNDSTREAM，长开始，长端）;
 

解决方案

您可能能够做到这一点使用 n音讯，它是一个净音频库。

使用示例我是能够抛出一个快速测试应用程序rel=\"nofollow\"> ，跃跃欲试。使用WaveSteam.Skip（中间体秒）的方法，你都能够在该文件中的特定位置开始。我一直没能制定出如何让终端位置虽然。下面是在30秒标记启动wma文件修改后的示例：

  IWavePlayer waveOutDevice =新waveout的（）;
    的WaveStream mainOutputStream;
    WaveChannel32 volumeStream;    的WaveStream wmaReader =新WMAFileReader（@F：\\我的音乐\\神童\\音乐的抛弃代\\ 01 Intro.wma）;
    volumeStream =新WaveChannel32（wmaReader）;    mainOutputStream = volumeStream;    mainOutputStream.Skip（30）; // 30秒开始到文件
    waveOutDevice.Init（mainOutputStream）;
    waveOutDevice.Play（）;
 

以上省略样品清理$ C C停止播放并不过流处理。希望有点帮助。

I have a single WMA file which contains lots of different pieces of audio. Is there any way I can play part of a sound stream?

Something like:

public static void Play(Stream soundStream, long start, long end);

解决方案

You may be able to do this using NAudio, it is a audio library for .Net.

Using the example here I was able to throw a quick test application up to try it. Using the WaveSteam.Skip(int seconds) method you are able to start at a specific position in the file. I have not been able to work out how to get the end position though. Below is the modified sample that starts a wma file at the 30 second mark:

    IWavePlayer waveOutDevice = new WaveOut();
    WaveStream mainOutputStream;
    WaveChannel32 volumeStream;

    WaveStream wmaReader = new WMAFileReader(@"F:\My Music\The Prodigy\Music for the Jilted Generation\01 Intro.wma");
    volumeStream = new WaveChannel32(wmaReader);

    mainOutputStream = volumeStream;

    mainOutputStream.Skip(30); //start 30 seconds into the file
    waveOutDevice.Init(mainOutputStream);
    waveOutDevice.Play();

The above sample omits the cleanup code to stop playback and dispose of the streams however. Hope that helps a bit.

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