I need to find a way to get the length of a WMA file without using any of the Windows Media Player(WMP) dlls. I found way to do it using WMP dlls, which you can see here, but due to another issue, I'd rather find a way where I don't have to use WMP.

我需要找到一种方法来获取WMA文件的长度，而无需使用任何Windows Media Player（WMP）dll。我找到了使用WMP dll的方法，你可以在这里看到，但由于另一个问题，我宁愿找到一种方法，我不必使用WMP。

One promising method that use NAudio and works with MP3s can be seen below:

使用NAudio并使用MP3的一种有前景的方法如下所示：

double GetMediaDuration(string MediaFilename)
{
    double duration = 0.0;
    using (FileStream fs = File.OpenRead(MediaFilename))
    {
        Mp3Frame frame = Mp3Frame.LoadFromStream(fs);
        if (frame != null)
        {
            _sampleFrequency = (uint)frame.SampleRate;
        }
        while (frame != null)
        {
            if (frame.ChannelMode == ChannelMode.Mono)
            {
                duration += (double)frame.SampleCount * 2.0 / (double)frame.SampleRate;
            }
            else
            {
                duration += (double)frame.SampleCount * 4.0 / (double)frame.SampleRate;
            }
            frame = Mp3Frame.LoadFromStream(fs);
        }
    }
    return duration;
}

Does anyone know of a way to port this over to work with a WMA file instead?

有没有人知道一种方法来移植它以使用WMA文件？

I looked at the source for the WindowsMediaFormat project, but I could not find a WMAFrame class or anything that might obviously let me swap out a class in order to get this working for WMAs.

我查看了WindowsMediaFormat项目的源代码，但我找不到WMAFrame类或任何可能显然让我换掉一个类的东西，以便让它适用于WMA。

2 个解决方案