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I m using c#.net and in web based application i want to calculate the time duration of wav file in minutes. Please help me out.
Thanks

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— two practical ways to get a WAV file duration in minutes for a web app. already pointed to external discussion; below are ready-to-use, self-contained methods (library and manual) plus key caveats.

Library (recommended): NAudio gives TotalTime directly and handles many WAV variants and compressed wrappers.

using NAudio.Wave;

public double GetWavMinutes(string path)
{
    using (var r = new WaveFileReader(path))
    {
        return r.TotalTime.TotalMinutes;
    }
}

// If you have an uploaded file stream (HttpPostedFile.InputStream or IFormFile.OpenReadStream()):
// using (var r = new WaveFileReader(stream)) { return r.TotalTime.TotalMinutes; }

Manual (no dependency): read the RIFF/WAVE header, grab the fmt chunk byteRate and the data chunk size, then compute seconds = dataSize / byteRate. This works for standard WAVs and is fast because it does not decode audio.

public static double GetWavMinutes(string path)
{
    using (var fs = File.OpenRead(path))
    using (var br = new BinaryReader(fs, System.Text.Encoding.ASCII))
    {
        if (System.Text.Encoding.ASCII.GetString(br.ReadBytes(4)) != "RIFF") throw new InvalidDataException();
        br.ReadInt32();
        if (System.Text.Encoding.ASCII.GetString(br.ReadBytes(4)) != "WAVE") throw new InvalidDataException();

        int byteRate = 0;
        int dataSize = 0;

        while (fs.Position < fs.Length)
        {
            var id = System.Text.Encoding.ASCII.GetString(br.ReadBytes(4));
            var size = br.ReadInt32();
            if (id == "fmt ")
            {
                br.ReadInt16(); // audio format
                br.ReadInt16(); // channels
                br.ReadInt32(); // sample rate
                byteRate = br.ReadInt32();
                br.ReadBytes(4); // block align + bits/sample (skip)
                if (size > 16) br.ReadBytes(size - 16);
            }
            else if (id == "data")
            {
                dataSize = size;
                break;
            }
            else
            {
                br.ReadBytes(size);
            }
            if ((size & 1) == 1) br.ReadByte();
        }

        if (byteRate <= 0 || dataSize <= 0) throw new InvalidDataException();
        return (double)dataSize / byteRate / 60.0;
    }
}

Cautions and tips: use the library if the WAV may be compressed or non-PCM. When reading uploaded files in ASP.NET, operate on the request stream (reset Position = 0 if previously read). Always dispose readers, handle malformed headers, and account for chunk padding (code above does). As observed the thread is old, but these approaches remain valid across .NET versions.

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Member Avatar for 123as

This thread is more than three months old. Perhaps start a new thread instead?


bokka * bokka = (bokka)2

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