Vb.net et la webcam(dshowNet)

**jacko842** · 04/06/2010, 14h42

Bonjour j ai une application qui géré la webcam(capture d'image) a partir du flux vidéo direct x

Voici le code:

form1.vb

Code :

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Imports DirectX.Capture
Imports System.Drawing
Imports System.Drawing.Imaging
 
Public Class Form1
    Inherits System.Windows.Forms.Form
 
 
#Region " Code généré par le Concepteur Windows Form "
 
    Public Sub New()
        MyBase.New()
 
        'Cet appel est requis par le Concepteur Windows Form.
        InitializeComponent()
 
        'Ajoutez une initialisation quelconque après l'appel InitializeComponent()
 
    End Sub
 
    'La méthode substituée Dispose du formulaire pour nettoyer la liste des composants.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub
 
    'Requis par le Concepteur Windows Form
    Private components As System.ComponentModel.IContainer
 
    'REMARQUE*: la procédure suivante est requise par le Concepteur Windows Form
    'Elle peut être modifiée en utilisant le Concepteur Windows Form.  
    'Ne la modifiez pas en utilisant l'éditeur de code.
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents ComboBox1 As System.Windows.Forms.ComboBox
    Friend WithEvents ComboBox2 As System.Windows.Forms.ComboBox
    Friend WithEvents PicCam As System.Windows.Forms.PictureBox
    Friend WithEvents CmdCapture As System.Windows.Forms.Button
    Friend WithEvents PicCapture As System.Windows.Forms.PictureBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.ComponentModel.ComponentResourceManager = New System.ComponentModel.ComponentResourceManager(GetType(Form1))
        Me.Button1 = New System.Windows.Forms.Button
        Me.PicCapture = New System.Windows.Forms.PictureBox
        Me.ComboBox1 = New System.Windows.Forms.ComboBox
        Me.ComboBox2 = New System.Windows.Forms.ComboBox
        Me.PicCam = New System.Windows.Forms.PictureBox
        Me.CmdCapture = New System.Windows.Forms.Button
        CType(Me.PicCapture, System.ComponentModel.ISupportInitialize).BeginInit()
        CType(Me.PicCam, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(16, 379)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(75, 23)
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "Valider la configuration"
        Me.Button1.Visible = False
        '
        'PicCapture
        '
        Me.PicCapture.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle
        Me.PicCapture.Location = New System.Drawing.Point(443, 327)
        Me.PicCapture.Name = "PicCapture"
        Me.PicCapture.Size = New System.Drawing.Size(111, 90)
        Me.PicCapture.TabIndex = 7
        Me.PicCapture.TabStop = False
        Me.PicCapture.Visible = False
        '
        'ComboBox1
        '
        Me.ComboBox1.FormattingEnabled = True
        Me.ComboBox1.Location = New System.Drawing.Point(16, 327)
        Me.ComboBox1.Name = "ComboBox1"
        Me.ComboBox1.Size = New System.Drawing.Size(76, 21)
        Me.ComboBox1.TabIndex = 9
        Me.ComboBox1.Visible = False
        '
        'ComboBox2
        '
        Me.ComboBox2.FormattingEnabled = True
        Me.ComboBox2.Location = New System.Drawing.Point(16, 354)
        Me.ComboBox2.Name = "ComboBox2"
        Me.ComboBox2.Size = New System.Drawing.Size(75, 21)
        Me.ComboBox2.TabIndex = 10
        Me.ComboBox2.Visible = False
        '
        'PicCam
        '
        Me.PicCam.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle
        Me.PicCam.Location = New System.Drawing.Point(12, 12)
        Me.PicCam.Name = "PicCam"
        Me.PicCam.Size = New System.Drawing.Size(489, 398)
        Me.PicCam.TabIndex = 12
        Me.PicCam.TabStop = False
        '
        'CmdCapture
        '
        Me.CmdCapture.Font = New System.Drawing.Font("Microsoft Sans Serif", 12.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.CmdCapture.Image = CType(resources.GetObject("CmdCapture.Image"), System.Drawing.Image)
        Me.CmdCapture.Location = New System.Drawing.Point(517, 11)
        Me.CmdCapture.Name = "CmdCapture"
        Me.CmdCapture.Size = New System.Drawing.Size(142, 405)
        Me.CmdCapture.TabIndex = 11
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.BackColor = System.Drawing.Color.FromArgb(CType(CType(225, Byte), Integer), CType(CType(233, Byte), Integer), CType(CType(241, Byte), Integer))
        Me.ClientSize = New System.Drawing.Size(677, 428)
        Me.Controls.Add(Me.CmdCapture)
        Me.Controls.Add(Me.ComboBox2)
        Me.Controls.Add(Me.ComboBox1)
        Me.Controls.Add(Me.PicCapture)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.PicCam)
        Me.Icon = CType(resources.GetObject("$this.Icon"), System.Drawing.Icon)
        Me.MaximizeBox = False
        Me.MinimizeBox = False
        Me.Name = "Form1"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "PRENDRE UNE PHOTO"
        CType(Me.PicCapture, System.ComponentModel.ISupportInitialize).EndInit()
        CType(Me.PicCam, System.ComponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)
 
    End Sub
 
#End Region
 
    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim j As Short
        Dim f As Filter
        Try
            'listage des peripheriques video installés sur la machine
            ComboBox1.Items.Clear()
            For j = 0 To Dispositivos.VideoInputDevices.Count - 1
                f = Dispositivos.VideoInputDevices(j)
                ComboBox1.Items.Add(f.Name)
            Next
            If j > 0 Then ComboBox1.SelectedIndex = 0
 
            'listage des peripheriques audio installés sur la machine
            ComboBox2.Items.Clear()
            For j = 0 To Dispositivos.AudioInputDevices.Count - 1
                f = Dispositivos.AudioInputDevices(j)
                ComboBox2.Items.Add(f.Name)
            Next
            If j > 0 Then ComboBox2.SelectedIndex = 0
 
 
            'pre configuration du capturing
            'definission de la camera
            CaptureInformation2.Camera = Dispositivos.VideoInputDevices(ComboBox1.SelectedIndex)
            'mise en place du stream video et audio
            CaptureInformation2.CaptureInfo = New DirectX.Capture.Capture(CaptureInformation2.Camera, Dispositivos.AudioInputDevices(ComboBox2.SelectedIndex))
            'renseignement du panneau d'affichage de la video
            CaptureInformation2.CaptureInfo.PreviewWindow = PicCam
            'compteur pour les capture d'image (frame video)
            CaptureInformation2.Counter = 1
            CaptureInformation2.CounterFrames = 1
            'configurations avancées
            Configurer()
            'pour faire plus joli
            Button1.Enabled = False
            'pour la gestion evennementiel de la capture d'ecran je cree un gestionnaire d evennement sur Framecapturecomplete
            AddHandler CaptureInformation2.CaptureInfo.FrameCaptureComplete, AddressOf NewCaptureReady
        Catch ex As Exception
            MsgBox(ex.Message)
            End
        End Try
 
    End Sub
 
    Private Sub Configurer()
        Try
            'configurations avancées
            'configuration du systeme de compression video et audio
            CaptureInformation2.CaptureInfo.VideoCompressor = Dispositivos.VideoCompressors(1) 'compression video
            'taille de la video
            CaptureInformation2.CaptureInfo.FrameSize = New Size(320, 240) 'taille de la video
            'FPS de la video
            CaptureInformation2.CaptureInfo.FrameRate = 50 'FPS
            'fichier .avi
            ''CaptureInformation.CaptureInfo.Filename = Application.StartupPath + "\essai.avi"
            'lancement du streaming d'affichage
            CaptureInformation2.CaptureInfo.RenderPreview()
        Catch ex As Exception
            MsgBox(ex.Message)
            End
        End Try
    End Sub
 
    Private Sub NewCaptureReady(ByVal Sender As System.Windows.Forms.PictureBox)
        'appele par le gestionnaire de handler sur l'evennement "FrameCapture
        'ma picture capturé est arrivée...
 
        Dim la As PictureBox = CType(Sender, PictureBox) 'la je converti mon picturebox en picturebox...je sais pas pourquoi, fo le faire sinom ca marche pas
 
        Try
            PicCapture.Image = la.Image 'j affecte ma capture d'image a mon picturebox qui attend que ca.
        Catch ex As Exception
            MsgBox(ex.Message)
            End
        End Try
    End Sub
 
    Sub Tue(ByVal Chem As String)
        Try
            My.Computer.FileSystem.DeleteFile(Chem)
        Catch ex As Exception
            'rien
        End Try
    End Sub
 
    Private Sub CmdCapture_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CmdCapture.Click
        Try
            'demande une capture DirectX ...et lorsqu'elle est ready je la recoit par le Handler cree un peut plus haut
            CaptureInformation2.CaptureInfo.CaptureFrame()
 
            Tue(System.AppDomain.CurrentDomain.BaseDirectory() & "WCcapture.jpg")
 
            Do While PicCapture.Image Is Nothing
                Application.DoEvents()
            Loop
            PicCapture.Image.Save(System.AppDomain.CurrentDomain.BaseDirectory() & "WCcapture.jpg", System.Drawing.Imaging.ImageFormat.Jpeg)
        Catch ex As Exception
            MsgBox(ex.Message.ToString, MsgBoxStyle.Critical, "impossible d'enregister l'image")
        End Try
 
        End
    End Sub
End Class

ModCap.vb

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

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Option Strict On
Option Explicit On 
 
Imports DirectX.Capture
Imports System
Imports System.IO
 
Module ModCap
 
 
    Public Structure Active2
        Dim Camera As Filter
        Dim CaptureInfo As DirectX.Capture.Capture '' l'ancienne declaration etait Dim CaptureInfo as Capture
        Dim Counter As Integer
        Dim CounterFrames As Integer
        Dim PathVideo As String
    End Structure
 
    'le streaming en cours
    Public CaptureInformation2 As Active2
    'le filtre en cours
    Public Dispositivos As New Filters()
 
End Module

Si j'utilise le programme sur un pc qui a une webcam tout va bien, mais une fois que je le met sur un pc sans webcam j'ai un problème au niveau du

Public Dispositivos As New Filters() qui se trouve dans le module.

Je voudrais pouvoir mettre le programme sur un pc qui n'a pas de webcam sans que le programme plante.

Je voudrais pouvoir détecter si une webcam est branché ou pas sur le pc

Merci d'avance

**jacko842** · 04/06/2010, 19h37

Code :

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#Region "########################################""FONCTION ET PROCEDURE##################################################"
    ''' <summary>
    ''' FONCTION: RECUPERE LA DESCRIPTION DE LA VERSION DU PILOTE
    ''' </summary>
    ''' <param name="wDriverIndex"></param>
    ''' <param name="lpszName"></param>
    ''' <param name="cbName"></param>
    ''' <param name="lpszVer"></param>
    ''' <param name="cbVer"></param>
    ''' <returns></returns>
    ''' <remarks></remarks>
    Declare Function capGetDriverDescriptionA Lib "avicap32.dll" _
       (ByVal wDriverIndex As Short, _
        ByVal lpszName As String, ByVal cbName As Integer, ByVal lpszVer As String, _
        ByVal cbVer As Integer) As Boolean
    ''' <summary>
    ''' PROCEDURE: POUR DETECTER LA WEBCAM
    ''' </summary>
    ''' <remarks></remarks>
    Private Sub PROC_DETECTE_WEBCAM()
        Dim DriverName As String = Space(80)
        Dim DriverVersion As String = Space(80)
 
        If capGetDriverDescriptionA(0, DriverName, 80, DriverVersion, 80) = False Then
            MsgBox("Aucune webcam n'est détectée. " & Chr(13) & "Vous devez connecter une webcam pour pouvoir utiliser le programme. ", vbInformation, "Message")
            End
        End If
    End Sub
#End Region

Vb.net et la webcam(dshowNet)

VB.NET

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