AForge 经验和文件操作

Question

大家早上好，

这里有人有使用 AForge 和视频或网络摄像头应用程序的经验吗？

有一个名为 VideoCaptureDeviceForm 的 .cs 文件是 AForge.DirectShow 的一部分，它提供了一种 select 使用本地视频设备（即网络摄像头）的方法。

我希望能够在我的计算机上自动检测并启动网络摄像头，但会弹出一个对话框要求 select 网络摄像头。我需要一种方法以某种方式绕过它或自动按下 OK 按钮。

Dialogbox

我尝试在打开对话框按钮方法中使用 SendKeys.Send("{ENTER}")，即启动相机，但出现错误。

在 VideoCaptureDeviceForm.cs 中，有一个名为 okButton_Click 的方法，下一个想法是操纵它来执行我希望应用程序执行的操作。

很遗憾，我没有解决这个问题的经验。任何人都可以建议如何执行此操作或我下一步应该做什么？谢谢。

VideoCaptureDeviceForm.cs如下：

using System;
using System.Threading;
using System.Windows.Input;
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.Video;
using AForge.Video.DirectShow;
using Accord.Video.FFMPEG;
using AForge.Video.VFW;

namespace WindowsFormsApp1
{
public partial class Form1 : Form
{
    private FilterInfoCollection VideoCaptureDevices;
    private VideoCaptureDevice FinalVideo = null;
    private VideoCaptureDeviceForm captureDevice;
    private Bitmap video;
    private VideoFileWriter FileWriter = new VideoFileWriter();
    private SaveFileDialog saveAvi;

    public Form1()
    {
        InitializeComponent();


        Start_Vid();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        VideoCaptureDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
        captureDevice = new VideoCaptureDeviceForm();

    }

    void FinalVideo_NewFrame(object sender, NewFrameEventArgs eventArgs)
    {
        if (Stop.Text == "Stop Record")
        {
            video = (Bitmap)eventArgs.Frame.Clone();
            pictureBox1.Image = (Bitmap)eventArgs.Frame.Clone();
            //AVIwriter.Quality = 0;
            FileWriter.WriteVideoFrame(video);
            //AVIwriter.AddFrame(video);
        }
        else
        {
            video = (Bitmap)eventArgs.Frame.Clone();
            pictureBox1.Image = (Bitmap)eventArgs.Frame.Clone();
        }
    }

    private void Stop_Vid()
    {
        if (Stop.Text == "Stop Record")
        {
            Stop.Text = "Stop";
            if (FinalVideo == null)
            { return; }
            if (FinalVideo.IsRunning)
            {
                //this.FinalVideo.Stop();
                FileWriter.Close();
                //this.AVIwriter.Close();
                pictureBox1.Image = null;
            }
        }
        else
        {
            this.FinalVideo.Stop();
            FileWriter.Close();
            //this.AVIwriter.Close();
            pictureBox1.Image = null;
        }
    }
    private void butstop_Click(object sender, EventArgs e)
    {
        if (Stop.Text == "Stop Record")
        {
            Stop.Text = "Stop";
            if (FinalVideo == null)
            { return; }
            if (FinalVideo.IsRunning)
            {
                //this.FinalVideo.Stop();
                FileWriter.Close();
                //this.AVIwriter.Close();
                pictureBox1.Image = null;
            }
        }
        else
        {
            this.FinalVideo.Stop();
            FileWriter.Close();
            //this.AVIwriter.Close();
            pictureBox1.Image = null;
        }
    }

    private void button3_Click(object sender, EventArgs e)
    {
        pictureBox1.Image.Save("IMG" + DateTime.Now.ToString("hhmmss") + ".jpg");
    }

    private void Form1_FormClosing(object sender, FormClosingEventArgs e)
    {
        if (FinalVideo == null)
        { return; }
        if (FinalVideo.IsRunning)
        {
            this.FinalVideo.Stop();
            FileWriter.Close();
            //this.AVIwriter.Close();
        }
    }

    private void Save_Click(object sender, EventArgs e)
    {
        saveAvi = new SaveFileDialog();
        saveAvi.Filter = "Avi Files (*.avi)|*.avi";
        saveAvi.FileName = "New Vid1";

        if (saveAvi.ShowDialog() == System.Windows.Forms.DialogResult.OK)
        {
            int h = captureDevice.VideoDevice.VideoResolution.FrameSize.Height;
            int w = captureDevice.VideoDevice.VideoResolution.FrameSize.Width;
            FileWriter.Open(saveAvi.FileName, w, h, 25, VideoCodec.Default, 5000000);
            FileWriter.WriteVideoFrame(video);


            //AVIwriter.Open(saveAvi.FileName, w, h);
            Stop.Text = "Stop Record";
            //FinalVideo = captureDevice.VideoDevice;
            //FinalVideo.NewFrame += new NewFrameEventHandler(FinalVideo_NewFrame);
            //FinalVideo.Start();
        }


    }

    //##############################################//
    //        Method not working        //
    //##############################################//

    private void Start_Vid()
    {
        SendKeys.Send("{ENTER}");
        if (captureDevice.ShowDialog(this) == DialogResult.OK)
        {

            VideoCaptureDevice videoSource = captureDevice.VideoDevice;
            FinalVideo = captureDevice.VideoDevice;
            FinalVideo.NewFrame += new NewFrameEventHandler(FinalVideo_NewFrame);
            FinalVideo.Start();
        }
    }

    //##############################################//
    //        Method working            //
    //##############################################//

    private void Start_Click(object sender, EventArgs e)
    {
        SendKeys.Send("{ENTER}");
        if (captureDevice.ShowDialog(this) == DialogResult.OK)
        {
            VideoCaptureDevice videoSource = captureDevice.VideoDevice;
            FinalVideo = captureDevice.VideoDevice;
            FinalVideo.NewFrame += new NewFrameEventHandler(FinalVideo_NewFrame);
            FinalVideo.Start();
        }
    }
    private void Close_Click(object sender, EventArgs e)
    {
        this.Close();
    }
}

}

Answer 1

1) 首先，您需要找到系统附带的所有网络摄像头设备

public FilterInfoCollection LoaclWebCamsCollection  = new FilterInfoCollection(FilterCategory.VideoInputDevice);

2) 然后你想使用哪个网络摄像头 select "MonikerString" 那个网络摄像头

    VideoCaptureDevice videoSource = new VideoCaptureDevice(LoaclWebCamsCollection["Select webcam you want to user"].MonikerString);
                      OR
    VideoCaptureDevice videoSource = new VideoCaptureDevice(LoaclWebCamsCollection[0].MonikerString);




private void Start_Vid()
{
    FinalVideo = new 
    VideoCaptureDevice(LoaclWebCamsCollection[0].MonikerString);
    FinalVideo.NewFrame += new NewFrameEventHandler(FinalVideo_NewFrame);
    FinalVideo.Start();
}

AForge 经验和文件操作

AForge experience and file manipulation

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