.wma到mono，使用C＃的PCM 8 KHz .wav格式 [英] .wma to mono, PCM 8 KHz .wav format using C#

问题描述

我正在尝试使用C＃将.wma转换为单声道，PCM 8 KHz .wav格式。哪个应该与Windows Server 2008 / XP和7特别兼容。



这有用吗？

I am trying to convert .wma to mono, PCM 8 KHz .wav format using C#. Which should be particularly compatible with Windows server 2008/ XP and 7.

Does this work?

推荐答案

我知道的最好的事情是ffmpeg或相关的libav。请参阅：

http://en.wikipedia.org/wiki/FFmpeg [< a href =http://en.wikipedia.org/wiki/FFmpegtarget =_ blanktitle =New Window> ^ ]，

http://en.wikipedia.org/wiki/Libavcodec [ ^ ]，

http：// ffmpeg。 org / [ ^ ]，

http://libav.org/ [ ^ ]。



你可以看到它是如何工作的并在C＃中实现它，但即使你想要它也会有大量的工作量实现所需的最小值。



一个简单的解决方案是：从源代码获取或构建可执行文件，然后通过 System.Diagnostics.Process.St art ： http://msdn.microsoft.com/en -us / library / system.diagnostics.process.aspx [ ^ ]。



此外，您可以获取并构建库并使用P / Invoke链接它们。



如果您需要学习P / Invoke，请从这里开始：

http://en.wikipedia.org/wiki/P/Invoke [ ^ ]，

http://msdn.microsoft.com/en-us/library/Aa712982 [ ^ ]。



此CodeProject也很有用： Essential P / Invoke [ ^ ]。



P / Invoke的一种替代方法是使用C ++ / CLI混合模式（托管+非托管）项目。此项目可以构建全局钩子所需的DLL，但它可以包含一些托管包装器CLI代码，因此，从.NET应用程序的角度来看，您可以将其用作常规.NET程序集，即引用它。请参阅：

http://en.wikipedia.org/wiki/C ％2B％2B / CLI [ ^ ]，

http：//www.ecma-international .org / publications / standards / Ecma-372.htm [ ^ ]，

http：/ /msdn.microsoft.com/en-us/library/xey702bw.aspx [ ^ ]，

http：/ /msdn.microsoft.com/en-us/library/3bstk3k5 [ ^ ]。



如果你想要的话以编译形式重新分发图书馆，存在一个法律问题：由于专利问题或其他原因，它们不会在预先编制的表格上重新分发。

-SA

The best thing I know is ffmpeg or related libav. Please see:
http://en.wikipedia.org/wiki/FFmpeg[^],
http://en.wikipedia.org/wiki/Libavcodec[^],
http://ffmpeg.org/[^],
http://libav.org/[^].

You can see how it works and implement it in C#, but it would be huge amount of work, even if you want to implement the required minimum.

A trivial solution will be: to obtain or build executable from source code and then execute it as a child process via System.Diagnostics.Process.Start: http://msdn.microsoft.com/en-us/library/system.diagnostics.process.aspx[^].

Also, you can obtain and build the libraries and link them using P/Invoke.

If you need to learn P/Invoke, start from here:
http://en.wikipedia.org/wiki/P/Invoke[^],
http://msdn.microsoft.com/en-us/library/Aa712982[^].

This CodeProject can also be useful: Essential P/Invoke[^].

One alternative to P/Invoke is to use C++/CLI mixed-mode (managed+unmanaged) project. This project could build a DLL required by the global hooks, but it can contain some managed wrapper CLI code, so, from the standpoint of your .NET application, you can use it as a regular .NET assembly, that is, reference it. Please see:
http://en.wikipedia.org/wiki/C%2B%2B/CLI[^],
http://www.ecma-international.org/publications/standards/Ecma-372.htm[^],
http://msdn.microsoft.com/en-us/library/xey702bw.aspx[^],
http://msdn.microsoft.com/en-us/library/3bstk3k5[^].

If you want to re-distribute the libraries in compiled form, there is a legal problem: due to patent issues or something, they are not re-distributed on pre-compiled form.

—SA

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