C#winform中使用OpenCvSharp录制视频,学不会不要钱_c# opencv录像

有这样一个需求，要连接电脑的摄像头录制视频，用Aforge来做发现有的电脑不适配,于是打算用OpenCvSharp来实现

第一步:引用OpenCvSharp所需要的包(注意包的版本最好保持一致)

1. OpenCvSharp4
2. OpenCvSharp4.runtime.win
3. AForge.Video.DirectShow   (这个是用来获取电脑摄像头数量)

第二步：话不多说直接上代码

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            Control.CheckForIllegalCrossThreadCalls = false; //加载时 取消跨线程检查
        }
        private VideoCapture capture;
        private VideoWriter writer=new VideoWriter();
        private Mat frame;
        private bool _IsPlay = false;
        private void Form1_Load(object sender, EventArgs e)
        {
            FilterInfoCollection filterInfoCollection = new FilterInfoCollection(FilterCategory.VideoInputDevice);
            if(filterInfoCollection.Count==0)
            {
                MessageBox.Show("没有摄像头");
                return;
            }
            foreach (FilterInfo item in filterInfoCollection)
            {
                comboBox1.Items.Add(item.Name);
            }
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            Thread t = new Thread(_PlayFun);
            t.IsBackground = true;
            t.Name = "Camera Play Thread";
            t.Start();
            _IsPlay = true;
        }
        private void _PlayFun()
        {
            int index = this.comboBox1.SelectedIndex;
            capture = new VideoCapture(index);
            double width = capture.Get(VideoCaptureProperties.FrameWidth);
            double height = capture.Get(VideoCaptureProperties.FrameHeight);
            OpenCvSharp.Size size = new OpenCvSharp.Size(width, height);
            writer.Open("test.avi", VideoWriter.FourCC(@"XVID"), 30.0, size, true);
            if (capture.IsOpened())
            {
                while (_IsPlay)
                {
                    Mat mat = new Mat();
                    capture.Read(mat);
                    if (mat.Empty())
                    {
                        break;
                    }
                    writer.Write(mat);
                    this.pictureBox1.Invoke(new Action(() =>
                    {
                        pictureBox1.Image = BitmapConverter.ToBitmap(mat);
                    }));
                }
            }
            else
            {
                MessageBox.Show("摄像头打开失败!");
                return;
            }
        }
        private void button2_Click(object sender, EventArgs e)
        {
            _IsPlay = false;
            if (capture.IsOpened())
            {
                capture.Dispose();
                
            }
            if (writer.IsOpened())
            {
                writer.Release();
            }
        }
 
    }

当然，还需要用到2个Button(开始录制,结束录制)和一个pictureBox(展示图片)和一个combox(显示摄像头列表)

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