C# VideoCapture 多路视频播放

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效果

C#VideoCapture多路视频播放

项目 

代码

using OpenCvSharp;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace MultiVideoDemo
{
    public partial class Form4 : Form
    {
        public Form4()
        {
            InitializeComponent();
        }

        CancellationTokenSource ctsShow;
        CancellationTokenSource[] taskCTS = new CancellationTokenSource[6];
        ConcurrentQueue<Mat>[] matQueue = new ConcurrentQueue<Mat>[6];
        int fps = 25;
        string[] rtsp_url = new string[40];
        List<RTSPURLInfo> play_rtsp_url = new List<RTSPURLInfo>();

        /// <summary>
        /// 停止
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e)
        {
            ctsShow.Cancel();

            for (int i = 0; i < 6; i++)
            {
                taskCTS[i].Cancel();
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //初始化
            for (int i = 0; i < 6; i++)
            {
                taskCTS[i] = new CancellationTokenSource();
                matQueue[i] = new ConcurrentQueue<Mat>();
            }

            for (int i = 0; i < 40; i++)
            {
                rtsp_url[i] = "1.dav";
            }

            //play_rtsp_url
            for (int i = 0; i < 6; i++)
            {
                play_rtsp_url.Add(new RTSPURLInfo((i + 1).ToString(), rtsp_url[i]));
            }
        }

        /// <summary>
        /// 播放
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            ctsShow = new CancellationTokenSource();

            for (int i = 0; i < 6; i++)
            {
                taskCTS[i] = new CancellationTokenSource();
                matQueue[i] = new ConcurrentQueue<Mat>();
            }

            play_rtsp_url.Clear();
            for (int i = 0; i < 6; i++)
            {
                play_rtsp_url.Add(new RTSPURLInfo((i + 1).ToString(), rtsp_url[i]));
            }

            for (int i = 0; i < play_rtsp_url.Count; i++)
            {
                Task.Run(() => DecodeRTSP(play_rtsp_url[i].index, matQueue[i], play_rtsp_url[i].url, taskCTS[i].Token));
                System.Threading.Thread.Sleep(100);
            }

            //显示线程
            Task.Run(() =>
            {
                Mat mat = new Mat();
                string winName = "video";

                Cv2.NamedWindow(winName, WindowFlags.Normal);
                Cv2.ResizeWindow(winName, fullSize);

                int delay = (int)(1000 / fps);
                Stopwatch stopwatch = new Stopwatch();

                while (true)
                {
                    stopwatch.Restart();
                    delay = (int)(1000 / fps);
                    if (ctsShow.IsCancellationRequested) break;

                    Mat frame = CombiningImages();

                    Cv2.ImShow(winName, frame);

                    delay = (int)(delay - stopwatch.ElapsedMilliseconds);
                    if (delay <= 0)
                    {
                        delay = 1;
                    }
                    Console.WriteLine("delay:" + delay.ToString());
                    Cv2.WaitKey(delay);

                    frame.Dispose();
                }
                Cv2.DestroyAllWindows();
            });
        }

        OpenCvSharp.Size fullSize = new OpenCvSharp.Size(1008, 570);
        OpenCvSharp.Size mainSize = new OpenCvSharp.Size(672, 380);
        OpenCvSharp.Size subSize = new OpenCvSharp.Size(336, 190);

        Mat CombiningImages()
        {
            Console.WriteLine(string.Format("matQueue0:{0},matQueue1:{1},matQueue2:{2},matQueue3:{3},matQueue4:{4},matQueue5:{5}"
                , matQueue[0].Count
                , matQueue[1].Count
                , matQueue[2].Count
                , matQueue[3].Count
                , matQueue[4].Count
                , matQueue[5].Count
                ));

            Mat mat = Mat.Zeros(fullSize, MatType.CV_8UC3);

            Mat mat0 = new Mat();
            matQueue[0].TryDequeue(out mat0);
            if (mat0 == null || mat0.Empty())
            {
                mat0 = Mat.Zeros(mainSize, MatType.CV_8UC3);
            }
            Cv2.Resize(mat0, mat0, mainSize);

            Mat mat1 = new Mat();
            matQueue[1].TryDequeue(out mat1);
            if (mat1 == null || mat1.Empty())
            {
                mat1 = Mat.Zeros(subSize, MatType.CV_8UC3);
            }
            Cv2.Resize(mat1, mat1, subSize);

            Mat mat2 = new Mat();
            matQueue[2].TryDequeue(out mat2);
            if (mat2 == null || mat2.Empty())
            {
                mat2 = Mat.Zeros(subSize, MatType.CV_8UC3);
            }
            Cv2.Resize(mat2, mat2, subSize);

            Mat mat3 = new Mat();
            matQueue[3].TryDequeue(out mat3);
            if (mat3 == null || mat3.Empty())
            {
                mat3 = Mat.Zeros(subSize, MatType.CV_8UC3);
            }
            Cv2.Resize(mat3, mat3, subSize);

            Mat mat4 = new Mat();
            matQueue[4].TryDequeue(out mat4);
            if (mat4 == null || mat4.Empty())
            {
                mat4 = Mat.Zeros(subSize, MatType.CV_8UC3);
            }
            Cv2.Resize(mat4, mat4, subSize);

            Mat mat5 = new Mat();
            matQueue[5].TryDequeue(out mat5);
            if (mat5 == null || mat5.Empty())
            {
                mat5 = Mat.Zeros(subSize, MatType.CV_8UC3);
            }
            Cv2.Resize(mat5, mat5, subSize);

            //第一张主图
            Rect roi0 = new Rect(0, 0, 672, 380);
            Mat position0 = new Mat(mat, roi0);
            mat0.CopyTo(position0);

            //第二张图
            Rect roi1 = new Rect(672, 0, 336, 190);
            Mat position1 = new Mat(mat, roi1);
            mat1.CopyTo(position1);

            //第三张图
            Rect roi2 = new Rect(672, 190, 336, 190);
            Mat position2 = new Mat(mat, roi2);
            mat2.CopyTo(position2);

            //第4张图
            Rect roi3 = new Rect(672, 380, 336, 190);
            Mat position3 = new Mat(mat, roi3);
            mat3.CopyTo(position3);

            //第5张图
            Rect roi4 = new Rect(336, 380, 336, 190);
            Mat position4 = new Mat(mat, roi4);
            mat4.CopyTo(position4);

            //第6张图
            Rect roi5 = new Rect(0, 380, 336, 190);
            Mat position5 = new Mat(mat, roi5);
            mat5.CopyTo(position5);

            mat0.Dispose();
            mat1.Dispose();
            mat2.Dispose();
            mat3.Dispose();
            mat4.Dispose();
            mat5.Dispose();

            position0.Dispose();
            position1.Dispose();
            position2.Dispose();
            position3.Dispose();
            position4.Dispose();
            position5.Dispose();

            return mat;

        }

        void DecodeRTSP(string index, ConcurrentQueue<Mat> matQueue, string url, CancellationToken cancellationToken = default)
        {
            VideoCapture vcapture = new VideoCapture(url);
            if (!vcapture.IsOpened())
            {
                Console.WriteLine("打开视频文件失败");
                return;
            }

            // 计算等待时间（毫秒）
            int taskDelay = (int)(1000 / fps);
            Stopwatch stopwatch = new Stopwatch();

            while (true)
            {
                if (cancellationToken.IsCancellationRequested) break;

                stopwatch.Restart();
                Mat frame = new Mat();
                if (!vcapture.Read(frame))
                {
                    Console.WriteLine("读取失败");
                    break;
                }

                taskDelay = (int)(1000 / fps);

                //中间标注数字,模拟路数
                Cv2.PutText(frame, index.ToString(), new OpenCvSharp.Point(frame.Width / 2, frame.Height / 2), HersheyFonts.HersheySimplex, 20, Scalar.Red, 20);

                matQueue.Enqueue(frame);

                taskDelay = (int)(taskDelay - stopwatch.ElapsedMilliseconds);
                if (matQueue.Count > 100)
                {
                    Console.WriteLine("index:" + index + ",后续处理能力不足……");
                }

                if (matQueue.Count < 10)
                {
                    taskDelay = taskDelay - 5;
                }

                if (taskDelay <= 0)
                {
                    taskDelay = 0;
                }
                Console.WriteLine("index:" + index + ",taskDelay:" + taskDelay);
                Task.Delay(taskDelay).Wait();

            }

            vcapture.Release();

        }

        /// <summary>
        /// 取消第一路
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button4_Click(object sender, EventArgs e)
        {
            taskCTS[0].Cancel();
        }

        /// <summary>
        /// 记载第7路
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button3_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < 6; i++)
            {
                taskCTS[i].Cancel();
            }

            for (int i = 0; i < 6; i++)
            {
                taskCTS[i] = new CancellationTokenSource();
            }

            //删除最后一个元素
            play_rtsp_url.RemoveAt(play_rtsp_url.Count - 1);

            //把第7路的地址 放到第一的位置
            play_rtsp_url.Insert(0, new RTSPURLInfo("7", rtsp_url[6]));

            for (int i = 0; i < play_rtsp_url.Count; i++)
            {
                Task.Run(() => DecodeRTSP(play_rtsp_url[i].index, matQueue[i], play_rtsp_url[i].url, taskCTS[i].Token));
                System.Threading.Thread.Sleep(10);
            }
        }

        /// <summary>
        /// 加载第8路
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button5_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < 6; i++)
            {
                taskCTS[i].Cancel();
            }

            for (int i = 0; i < 6; i++)
            {
                taskCTS[i] = new CancellationTokenSource();
            }

            //删除最后一个元素
            play_rtsp_url.RemoveAt(play_rtsp_url.Count - 1);

            //把第8路的地址 放到第一的位置
            play_rtsp_url.Insert(0, new RTSPURLInfo("8", rtsp_url[7]));

            for (int i = 0; i < play_rtsp_url.Count; i++)
            {
                Task.Run(() => DecodeRTSP(play_rtsp_url[i].index, matQueue[i], play_rtsp_url[i].url, taskCTS[i].Token));
                System.Threading.Thread.Sleep(10);
            }

        }
    }

    public class RTSPURLInfo
    {
        public string index;
        public string url;

        public RTSPURLInfo(string index, string url)
        {
            this.index = index;
            this.url = url;
        }
    }

}
 

using OpenCvSharp;using System;using System.Collections.Concurrent;using System.Collections.Generic;using System.Diagnostics;using System.Threading;using System.Threading.Tasks;using System.Windows.Forms;namespace MultiVideoDemo{    public partial class Form4 : Form    {        public Form4()        {            InitializeComponent();        }        CancellationTokenSource ctsShow;        CancellationTokenSource[] taskCTS = new CancellationTokenSource[6];        ConcurrentQueue<Mat>[] matQueue = new ConcurrentQueue<Mat>[6];        int fps = 25;        string[] rtsp_url = new string[40];        List<RTSPURLInfo> play_rtsp_url = new List<RTSPURLInfo>();        /// <summary>        /// 停止        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void button2_Click(object sender, EventArgs e)        {            ctsShow.Cancel();            for (int i = 0; i < 6; i++)            {                taskCTS[i].Cancel();            }        }        private void Form1_Load(object sender, EventArgs e)        {            //初始化            for (int i = 0; i < 6; i++)            {                taskCTS[i] = new CancellationTokenSource();                matQueue[i] = new ConcurrentQueue<Mat>();            }            for (int i = 0; i < 40; i++)            {                rtsp_url[i] = "1.dav";            }            //play_rtsp_url            for (int i = 0; i < 6; i++)            {                play_rtsp_url.Add(new RTSPURLInfo((i + 1).ToString(), rtsp_url[i]));            }        }        /// <summary>        /// 播放        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void button1_Click(object sender, EventArgs e)        {            ctsShow = new CancellationTokenSource();            for (int i = 0; i < 6; i++)            {                taskCTS[i] = new CancellationTokenSource();                matQueue[i] = new ConcurrentQueue<Mat>();            }            play_rtsp_url.Clear();            for (int i = 0; i < 6; i++)            {                play_rtsp_url.Add(new RTSPURLInfo((i + 1).ToString(), rtsp_url[i]));            }            for (int i = 0; i < play_rtsp_url.Count; i++)            {                Task.Run(() => DecodeRTSP(play_rtsp_url[i].index, matQueue[i], play_rtsp_url[i].url, taskCTS[i].Token));                System.Threading.Thread.Sleep(100);            }            //显示线程            Task.Run(() =>            {                Mat mat = new Mat();                string winName = "video";                Cv2.NamedWindow(winName, WindowFlags.Normal);                Cv2.ResizeWindow(winName, fullSize);                int delay = (int)(1000 / fps);                Stopwatch stopwatch = new Stopwatch();                while (true)                {                    stopwatch.Restart();                    delay = (int)(1000 / fps);                    if (ctsShow.IsCancellationRequested) break;                    Mat frame = CombiningImages();                    Cv2.ImShow(winName, frame);                    delay = (int)(delay - stopwatch.ElapsedMilliseconds);                    if (delay <= 0)                    {                        delay = 1;                    }                    Console.WriteLine("delay:" + delay.ToString());                    Cv2.WaitKey(delay);                    frame.Dispose();                }                Cv2.DestroyAllWindows();            });        }        OpenCvSharp.Size fullSize = new OpenCvSharp.Size(1008, 570);        OpenCvSharp.Size mainSize = new OpenCvSharp.Size(672, 380);        OpenCvSharp.Size subSize = new OpenCvSharp.Size(336, 190);        Mat CombiningImages()        {            Console.WriteLine(string.Format("matQueue0:{0},matQueue1:{1},matQueue2:{2},matQueue3:{3},matQueue4:{4},matQueue5:{5}"                , matQueue[0].Count                , matQueue[1].Count                , matQueue[2].Count                , matQueue[3].Count                , matQueue[4].Count                , matQueue[5].Count                ));            Mat mat = Mat.Zeros(fullSize, MatType.CV_8UC3);            Mat mat0 = new Mat();            matQueue[0].TryDequeue(out mat0);            if (mat0 == null || mat0.Empty())            {                mat0 = Mat.Zeros(mainSize, MatType.CV_8UC3);            }            Cv2.Resize(mat0, mat0, mainSize);            Mat mat1 = new Mat();            matQueue[1].TryDequeue(out mat1);            if (mat1 == null || mat1.Empty())            {                mat1 = Mat.Zeros(subSize, MatType.CV_8UC3);            }            Cv2.Resize(mat1, mat1, subSize);            Mat mat2 = new Mat();            matQueue[2].TryDequeue(out mat2);            if (mat2 == null || mat2.Empty())            {                mat2 = Mat.Zeros(subSize, MatType.CV_8UC3);            }            Cv2.Resize(mat2, mat2, subSize);            Mat mat3 = new Mat();            matQueue[3].TryDequeue(out mat3);            if (mat3 == null || mat3.Empty())            {                mat3 = Mat.Zeros(subSize, MatType.CV_8UC3);            }            Cv2.Resize(mat3, mat3, subSize);            Mat mat4 = new Mat();            matQueue[4].TryDequeue(out mat4);            if (mat4 == null || mat4.Empty())            {                mat4 = Mat.Zeros(subSize, MatType.CV_8UC3);            }            Cv2.Resize(mat4, mat4, subSize);            Mat mat5 = new Mat();            matQueue[5].TryDequeue(out mat5);            if (mat5 == null || mat5.Empty())            {                mat5 = Mat.Zeros(subSize, MatType.CV_8UC3);            }            Cv2.Resize(mat5, mat5, subSize);            //第一张主图            Rect roi0 = new Rect(0, 0, 672, 380);            Mat position0 = new Mat(mat, roi0);            mat0.CopyTo(position0);            //第二张图            Rect roi1 = new Rect(672, 0, 336, 190);            Mat position1 = new Mat(mat, roi1);            mat1.CopyTo(position1);            //第三张图            Rect roi2 = new Rect(672, 190, 336, 190);            Mat position2 = new Mat(mat, roi2);            mat2.CopyTo(position2);            //第4张图            Rect roi3 = new Rect(672, 380, 336, 190);            Mat position3 = new Mat(mat, roi3);            mat3.CopyTo(position3);            //第5张图            Rect roi4 = new Rect(336, 380, 336, 190);            Mat position4 = new Mat(mat, roi4);            mat4.CopyTo(position4);            //第6张图            Rect roi5 = new Rect(0, 380, 336, 190);            Mat position5 = new Mat(mat, roi5);            mat5.CopyTo(position5);            mat0.Dispose();            mat1.Dispose();            mat2.Dispose();            mat3.Dispose();            mat4.Dispose();            mat5.Dispose();            position0.Dispose();            position1.Dispose();            position2.Dispose();            position3.Dispose();            position4.Dispose();            position5.Dispose();            return mat;        }        void DecodeRTSP(string index, ConcurrentQueue<Mat> matQueue, string url, CancellationToken cancellationToken = default)        {            VideoCapture vcapture = new VideoCapture(url);            if (!vcapture.IsOpened())            {                Console.WriteLine("打开视频文件失败");                return;            }            // 计算等待时间（毫秒）            int taskDelay = (int)(1000 / fps);            Stopwatch stopwatch = new Stopwatch();            while (true)            {                if (cancellationToken.IsCancellationRequested) break;                stopwatch.Restart();                Mat frame = new Mat();                if (!vcapture.Read(frame))                {                    Console.WriteLine("读取失败");                    break;                }                taskDelay = (int)(1000 / fps);                //中间标注数字,模拟路数                Cv2.PutText(frame, index.ToString(), new OpenCvSharp.Point(frame.Width / 2, frame.Height / 2), HersheyFonts.HersheySimplex, 20, Scalar.Red, 20);                matQueue.Enqueue(frame);                taskDelay = (int)(taskDelay - stopwatch.ElapsedMilliseconds);                if (matQueue.Count > 100)                {                    Console.WriteLine("index:" + index + ",后续处理能力不足……");                }                if (matQueue.Count < 10)                {                    taskDelay = taskDelay - 5;                }                if (taskDelay <= 0)                {                    taskDelay = 0;                }                Console.WriteLine("index:" + index + ",taskDelay:" + taskDelay);                Task.Delay(taskDelay).Wait();            }            vcapture.Release();        }        /// <summary>        /// 取消第一路        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void button4_Click(object sender, EventArgs e)        {            taskCTS[0].Cancel();        }        /// <summary>        /// 记载第7路        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void button3_Click(object sender, EventArgs e)        {            for (int i = 0; i < 6; i++)            {                taskCTS[i].Cancel();            }            for (int i = 0; i < 6; i++)            {                taskCTS[i] = new CancellationTokenSource();            }            //删除最后一个元素            play_rtsp_url.RemoveAt(play_rtsp_url.Count - 1);            //把第7路的地址 放到第一的位置            play_rtsp_url.Insert(0, new RTSPURLInfo("7", rtsp_url[6]));            for (int i = 0; i < play_rtsp_url.Count; i++)            {                Task.Run(() => DecodeRTSP(play_rtsp_url[i].index, matQueue[i], play_rtsp_url[i].url, taskCTS[i].Token));                System.Threading.Thread.Sleep(10);            }        }        /// <summary>        /// 加载第8路        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void button5_Click(object sender, EventArgs e)        {            for (int i = 0; i < 6; i++)            {                taskCTS[i].Cancel();            }            for (int i = 0; i < 6; i++)            {                taskCTS[i] = new CancellationTokenSource();            }            //删除最后一个元素            play_rtsp_url.RemoveAt(play_rtsp_url.Count - 1);            //把第8路的地址 放到第一的位置            play_rtsp_url.Insert(0, new RTSPURLInfo("8", rtsp_url[7]));            for (int i = 0; i < play_rtsp_url.Count; i++)            {                Task.Run(() => DecodeRTSP(play_rtsp_url[i].index, matQueue[i], play_rtsp_url[i].url, taskCTS[i].Token));                System.Threading.Thread.Sleep(10);            }        }    }    public class RTSPURLInfo    {        public string index;        public string url;        public RTSPURLInfo(string index, string url)        {            this.index = index;            this.url = url;        }    }}

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