效果

 项目

 代码

using OpenCvSharp;
using OpenCvSharp.Extensions;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace OpenCvSharp_读取rtsp流
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        CancellationTokenSource cts;
        VideoCapture capture;

        private void button1_Click(object sender, EventArgs e)
        {
            if (textBoxIP.Text == "" || textBoxPort.Text == "" ||
                textBoxUserName.Text == "" || textBoxPassword.Text == "")
            {
                MessageBox.Show("Please input IP, Port, User name and Password!");
                return;
            }

            String rtspUrl = string.Format("rtsp://{0}:{1}@{2}:{3}"
                , textBoxUserName.Text
                , textBoxPassword.Text
                , textBoxIP.Text
                , textBoxPort.Text
                );

            button1.Enabled = false;
            button2.Enabled = true;

            cts = new CancellationTokenSource();
            Task task = new Task(() =>
            {
                capture.Open(rtspUrl, VideoCaptureAPIs.ANY);
                if (capture.IsOpened())
                {
                    //var dsize = new System.Windows.Size(capture.FrameWidth, capture.FrameHeight);
                    Mat frame = new Mat();
                    while (true)
                    {
                        Thread.Sleep(10);
                        //判断是否被取消;
                        if (cts.Token.IsCancellationRequested)
                        {
                            pictureBox1.Image = null;
                            return;
                        }
                        //Read image
                        capture.Read(frame);
                        if (frame.Empty())
                            continue;

                        if (pictureBox1.Image != null)
                        {
                            pictureBox1.Image.Dispose();
                        }
                        pictureBox1.Image = BitmapConverter.ToBitmap(frame);
                    }
                }

            }, cts.Token);
            task.Start();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            capture = new VideoCapture();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            button2.Enabled = false;
            button1.Enabled = true;
            cts.Cancel();
            
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (capture != null)
            {
                capture.Release();
                capture.Dispose();
            }
        }
    }
}

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