Question

我使用fallowing库来检测网络摄像头以获得简单的c＃应用程序。当它调试工作正常，当我再次尝试它给出了一个错误。

Used reference 如果有人对此有任何想法，请帮我解决。

First get this box ，点击“确定”后会收到错误消息。

捕获视频图像时发生错误。视频捕捉现在将被终止。对象引用未设置为的实例对象

Form1.cs的

using System;
using System.Linq;
using System.Text;
using System.Data;
using System.Drawing;
using System.Windows.Forms;
using System.ComponentModel;
using System.Collections.Generic;
using WinFormCharpWebCam;

namespace camTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        WebCam webcam;

        private void button1_Click(object sender, EventArgs e)
        {
            webcam.Start();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            webcam.Stop();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            webcam.Continue();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            webcam = new WebCam();
            webcam.InitializeWebCam(ref imgVideo);
        }
    }
}

Webcam.cs

using System;
using System.IO;
using System.Linq;
using System.Text;
using WebCam_Capture;
using System.Collections.Generic;



namespace WinFormCharpWebCam
{
    //Design by Pongsakorn Poosankam
    class WebCam
    {
        private WebCamCapture webcam;
        private System.Windows.Forms.PictureBox _FrameImage;
        private int FrameNumber = 30;
        public void InitializeWebCam(ref System.Windows.Forms.PictureBox ImageControl)
        {
            webcam = new WebCamCapture();
            webcam.FrameNumber = ((ulong)(0ul));
            webcam.TimeToCapture_milliseconds = FrameNumber;
            webcam.ImageCaptured += new WebCamCapture.WebCamEventHandler(webcam_ImageCaptured);
            _FrameImage = ImageControl;
        }

        void webcam_ImageCaptured(object source, WebcamEventArgs e)
        {
            _FrameImage.Image = e.WebCamImage;
        }

        public void Start()
        {
            webcam.TimeToCapture_milliseconds = FrameNumber;
            webcam.Start(0);
        }

        public void Stop()
        {
            webcam.Stop();
        }

        public void Continue()
        {
            // change the capture time frame
            webcam.TimeToCapture_milliseconds = FrameNumber;

            // resume the video capture from the stop
            webcam.Start(this.webcam.FrameNumber);
        }

        public void ResolutionSetting()
        {
            webcam.Config();
        }

        public void AdvanceSetting()
        {
            webcam.Config2();
        }

    }
}

C＃代码始终无法检测网络摄像头

0 个答案: