混合从两个源文件读取的音频

Question

I want to mix audio read from two files (1 mp3 and 1 wav(recorded voice) file) into one file (mp3 or wav).

I have read many relevant answers but non helped me to get what I wanted.

Like this code below generate a steam as output. I do not know how to call this function properly and how to get the Output stream as an mp3/wav file at the end.

    public static void Combine(string[] inputFiles, Stream output)
{
    foreach (string file in inputFiles)
    {
        Mp3FileReader reader = new Mp3FileReader(file);
        if ((output.Position == 0) && (reader.Id3v2Tag != null))
        {
            output.Write(reader.Id3v2Tag.RawData, 0, reader.Id3v2Tag.RawData.Length);
        }
        Mp3Frame frame;
        while ((frame = reader.ReadNextFrame()) != null)
        {
            output.Write(frame.RawData, 0, frame.RawData.Length);
        }
    }
}

Answer 1

It looks like you took the code from http://mark-dot-net.blogspot.com/2010/11/merging-mp3-files-with-naudio-in-c-and.html . Check out http://markheath.net/post/mixing-and-looping-with-naudio as well. This talks about looping as well as mixing. Since you're not looping, you don't need that part.

Note that the example there sends the audio to the speaker. However, you can always replace that output with a (eg) WaveFileWriter .

Note also that the MixingWaveProvider32 requires that all inputs be in the same WaveFormat . If that's not the case, then you'll need to use a resampler. Luckily, there's http://mark-dot-net.blogspot.com/2014/05/how-to-resample-audio-with-naudio.html to help you out there as well.