Trimming mp3 files using NAudio

问题

Is it possible to trim a MP3 file using NAudio? I am looking for a way to take a standard mp3 file and take a part of it and make it a seperate mp3.

回答1:

Install NAudio from Nuget:

PM> Install-Package NAudio

Add using NAudio.Wave; and use this code:

void Main()
{
     var mp3Path = @"C:\Users\Ronnie\Desktop\podcasts\hanselminutes_0350.mp3";  
     var outputPath = Path.ChangeExtension(mp3Path,".trimmed.mp3");

     TrimMp3(mp3Path, outputPath, TimeSpan.FromMinutes(2), TimeSpan.FromMinutes(2.5));
}

void TrimMp3(string inputPath, string outputPath, TimeSpan? begin, TimeSpan? end)
{
    if (begin.HasValue && end.HasValue && begin > end)
        throw new ArgumentOutOfRangeException("end", "end should be greater than begin");

    using (var reader = new Mp3FileReader(inputPath))
    using (var writer = File.Create(outputPath))
    {           
        Mp3Frame frame;
        while ((frame = reader.ReadNextFrame()) != null)
        if (reader.CurrentTime >= begin || !begin.HasValue)
        {
            if (reader.CurrentTime <= end || !end.HasValue)
                writer.Write(frame.RawData,0,frame.RawData.Length);         
            else break;
        }
    }
}

Happy trails.

回答2:

Yes, an MP3 file is a sequence of MP3 frames, so you can simply remove frames from the start or end to trim the file. NAudio can parse MP3 frames.

See this question for more details.

来源：https://stackoverflow.com/questions/7932951/trimming-mp3-files-using-naudio