VB.NET get mp3 file duration...

LittleOleMeDesigns
LittleOleMeDesigns used Ask the Experts™
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I am trying to find a way with a vb.net program to retrieve the file duration (not file size) of an .mp3 file.  Does anyone know how to do this?
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Commented:
for some reason, that link isn't working for me... any chance you could post what it says?

Commented:
Idea 1.
Add a reference to "Windows Media Player" -- It's under the COM add-ins.
 Use the one which references "wmp.dll".  Then use this code:
Dim Duration as string
Dim w As New WMPLib.WindowsMediaPlayer
Dim m As WMPLib.IWMPMedia = w.newMedia(Filename)
If m IsNot Nothing Then
Duration = m.durationString
End If
w.close()


Idea  2:

checking links
 http://www.codeproject.com/aspnet/MP3PlayerControl.asp
 http://www.developerfusion.co.uk/show/62/


Idea 3:
  This is a bit detailed one.. but
GEtting data from mp3 header..
mp3 file format  http://mpgedit.org/mpgedit/mpeg_format/MP3Format.html
duration = total-number-of-frames * samples-per-frame / sample-frequency

How to get these data ?  Create a binary stream...  
read binary data from header and calculate urself..

Melih SARICA
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Author

Commented:
Thanks for doing that.  None of those look quite like what I'm needing.

I'm needing to create a program that will go through a given folder and compare files.  If the file name and file duration (not size) of the mp3 files are the same, then delete one of them because it's a duplicate.

Commented:
that is what ur asking..  mp3 file duration..
and there are 3 different answers of that questions..

for ur need:

here is an MSDN example





 For Directory.GetFiles and Directory.GetDirectories
' For File.Exists, Directory.Exists 
 
Imports System
Imports System.IO
Imports System.Collections
 
Public Class RecursiveFileProcessor
 
    Public Overloads Shared Sub Main(ByVal args() As String)
        Dim path As String
        For Each path In args
            If File.Exists(path) Then
                ' This path is a file.
                ProcessFile(path)
            Else
                If Directory.Exists(path) Then
                    ' This path is a directory.
                    ProcessDirectory(path)
                Else
                    Console.WriteLine("{0} is not a valid file or directory.", path)
                End If
            End If
        Next path
    End Sub 'Main
 
 
    ' Process all files in the directory passed in, recurse on any directories 
    ' that are found, and process the files they contain.
    Public Shared Sub ProcessDirectory(ByVal targetDirectory As String)
        Dim fileEntries As String() = Directory.GetFiles(targetDirectory)
        ' Process the list of files found in the directory.
        Dim fileName As String
        For Each fileName In fileEntries
            ProcessFile(fileName)
 
        Next fileName
        Dim subdirectoryEntries As String() = Directory.GetDirectories(targetDirectory)
        ' Recurse into subdirectories of this directory.
        Dim subdirectory As String
        For Each subdirectory In subdirectoryEntries
            ProcessDirectory(subdirectory)
        Next subdirectory
 
    End Sub 'ProcessDirectory
 
    ' Insert logic for processing found files here.
    Public Shared Sub ProcessFile(ByVal path As String)
        ' Check File name and duration in hear 
    End Sub 'ProcessFile
End Class 'RecursiveFileProcessor

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Author

Commented:
Yeah... I knew how to iterate through items in files and compare them... what I don't know is how to grab the file duration from the file.  I'll try this example and see if I can pull that up.
Commented:
there is no duration information kept on the file...

I ve told 2 differen ways..
one is using media player com object to retrieve file duration..
other is reading the framecount and calcuting it by urself..
Chose one of it..  

Melih SARICA

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