System.AccessViolationException'发生在System.Drawing.dll

Question

我正在尝试使用 emgucv 库 v3.1 访问 vb.net 中的网络摄像头。当我运行该程序时，网络摄像头正在启动，但随后会中断并弹出错误

System.Drawing.dil 中发生类型为“System.Access ViolationException”的未处理异常

附加信息：试图读取或写入受保护的内存。这是

通常表明其他内存已损坏。

这是我正在使用的代码

Dim webcam As New Capture

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

Timer1.Start()

End Sub

Timer1.Stop()

Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click webcam.Dispose()

End Sub

Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick

Try

PictureBox1.Image = webcam.QueryFrame.Bitmap

Catch ex As Exception

webcam - New Capture

End Try

End Sub