如何初始化AForge网络摄像头 [英] How initialize AForge webcam

问题描述

我尝试写一个小和平的代码来捕获一个框架使用Aforge
我参考了Aforge.dll和AForge.Video.DirectShow.dll
代码如下，但我是做错了。
警告我得到videoDevices的名称在当前上下文中不存在
我认为它必须做的，我试图创建该变量，但我不知道在哪里放置
错误显示在visual studio中，也作为对象videoDevices下的redline

I try to write a small peace of code to capture a frame using Aforge I made a reference to Aforge.dll and AForge.Video.DirectShow.dll The code is below, but i am doing something wrong. The Warning i get "the name videoDevices does not exist in the current context. I think it has to do about where i try to create that variable but i'm not exactly sure as where to place that code of the button to get it initialized. The error is displayed in visual studio also as a redline under the object "videoDevices"

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using AForge;
using AForge.Video.DirectShow;

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

    }

    private void button1_Click(object sender, EventArgs e)
    {

        videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);

        if (videoDevices.Count == 0)
            throw new ApplicationException();

        foreach (FilterInfo device in videoDevices)
        {
    VideoCaptureDevice videoSource = new    VideoCaptureDevice(device.MonikerString);
            videoSource.DesiredFrameSize = new Size(320, 240);
            videoSource.DesiredFrameRate = 15;
            videoSourcePlayer1.VideoSource = videoSource;
            videoSourcePlayer1.Start();
        }

    }
    }
}

推荐答案

根据请求的解决方案如下，代码工作，我会提出一个新的问题，我有另一个问题。该代码需要一个下拉框，2个按钮和一个picturebox

As requested the solution is below , the code works, i will raise a new question for another question i have about it. the code requires a dropdown box, 2 buttons and a picturebox

using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using AforgeCam;
using AForge.Video;
using AForge.Video.DirectShow;

namespace AforgeCam
{
public partial class Form1 : Form
{
private FilterInfoCollection VideoCaptureDevices;
private VideoCaptureDevice FinalVideo;

public Form1() // init
{
    InitializeComponent();
    {
        VideoCaptureDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
        foreach (FilterInfo VideoCaptureDevice in VideoCaptureDevices)
        {
            comboBox1.Items.Add(VideoCaptureDevice.Name);
        }
        comboBox1.SelectedIndex = 0;
    }
}

private void button1_Click(object sender, EventArgs e)
{
    FinalVideo = new VideoCaptureDevice(VideoCaptureDevices[comboBox1.SelectedIndex].MonikerString);
    FinalVideo.NewFrame += new NewFrameEventHandler(FinalVideo_NewFrame);
    FinalVideo.Start();
}

void FinalVideo_NewFrame(object sender, NewFrameEventArgs eventArgs)
{
    Bitmap video = (Bitmap)eventArgs.Frame.Clone();
    pictureBox1.Image = video;

}

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

这篇关于如何初始化AForge网络摄像头的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！