C#:如何在picturebox中显示已捕获的视频

Question

为什么不使用Microsoft® Video for Windows® (VFW) 

Answer 1

VFW没有用过关键问题不在于我用什么库捕获的,而是如何在Windows Form中显示啊

Answer 2

不停保存视频中每一帧的图片，弄一个Timer,不停地加载图片（以较高的频率）。原理, 确实是这样的, 但是在.net里, 简单的Timer难以保证流畅性

Answer 3

http://www.cnblogs.com/witluo/articles/540228.html

Answer 4

Picture只能一张张的显示图片，效率比较低，用个显示视频的控件吧

Answer 5

这个问题我做过，就是到网上下一个microsoft 公司的DirectX 控件，然后找到里面的AudioVideoPlayback.dll;接下来按照平时调用dll的方法就可以用了。这个问题在http://www.qqread.com/csharp/i487113002.html上有很详细的说明！我现在也有做好的程序，如果你需要。可以发邮件给我。[email protected]!

Answer 6

在代码生成的picturebox中如何加载图片呢？
学习

Answer 7

代码生成picturebox pb=new picturebox();
pb.loction=new point(24;58);
pb.size=new size(100，200);
pb.image=imagelist1.images[0];
this.control.add(pb);//pb.image=imagelist1.images[0];
这句总是提示错误说索引值无效。
请教 如何应用才能显示图片呢？

Answer 8

        /// <summary>
        /// 视频按钮功能，打开当前已安装的视频驱动程序，并向远程客户端发送信息，通知视频连接
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void tool_Video_Click(object sender, EventArgs e)
        {
            viodeo = new Video(pictureBox1.Handle, pictureBox1.Width, pictureBox1.Height);    //创建并引用Video类
            viodeo.StartWebCam();                                                             //打开视频设备
            ClassMsg msg = new ClassMsg();
            msg.sendKind = SendKind.SendCommand;
            msg.msgCommand = MsgCommand.VideoOpen;
            msg.Data = Encoding.Unicode.GetBytes("");
            IPAddress ip = IPAddress.Parse(((this.Tag as TreeNode).Tag as ClassUserInfo).userIp);
            string port = Convert.ToString(((this.Tag as TreeNode).Tag as ClassUserInfo).userPort);
            udpsocket.Send(ip,Convert.ToInt32(port),new ClassSerializers().SerializeBinary(msg).ToArray());
            Voiding = true;
            SendViod = false;
            timer1.Enabled = true;
            panel7.Visible = true;
        }        /// <summary>
        /// 以每秒级的速度向远程客户端发送图片，并将图片存储在远程客户端的指定路劲下
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void timer1_Tick(object sender, EventArgs e)
        {
            if(Voiding || !SendViod || pictureBox1.Image != null)
            {
                SendViod = true;             //视频开启或关闭
                IPAddress ip = IPAddress.Parse(((this.Tag as TreeNode).Tag as ClassUserInfo).userIp);
                string port = Convert.ToString(((this.Tag as TreeNode).Tag as ClassUserInfo).userPort);
                ////string msgid = Guid.NewGuid().ToString();                                  //设置全局唯一标识
                string revid = ((this.Tag as TreeNode).Tag as ClassUserInfo).userID;       //远程用户ID
                string sid = Publec_Class.UserID;                                          //当前用户ID                ClassMsg msg = new ClassMsg();
                msg.sendKind = SendKind.SendCommand;                      //信息发送的类型
                msg.msgCommand = MsgCommand.Videoing;                     //发送视频中
                msg.sendState = SendState.Sending;                        //文件正在发送中
                msg.SID = sid;
                msg.SIP = msg.GetLocalIP();
                msg.RID = revid;
                //msg.msgID = msgid;
                msg.Data = Encoding.Unicode.GetBytes("");                ClassMsg start = new ClassMsg();
                start.sendKind = SendKind.SendCommand;                      //信息发送的类型
                start.msgCommand = MsgCommand.Videoing;                     //发送视频中
                start.sendState = SendState.Start;                          //文件正在发送中
                start.SID = sid;
                start.SIP = msg.GetLocalIP();
                start.RID = revid;
                //start.msgID = msgid;
                start.Data = Encoding.Unicode.GetBytes("");
                udpsocket.Send(ip,Convert.ToInt32(port),new ClassSerializers().SerializeBinary(start).ToArray());                viodeo.GrabImage(pictureBox1.Handle,"C:\\TempVoid.Bmp");    //将pictureBox1中的图片存入到指定的路径中
                FileStream stream = File.OpenRead("C:\\TempVoid.Bmp");      //打开已有的文件，以便读取
                //对stream中的文件进行分流发送
                int sendlen = 1024;               //设置读取块的大小
                long sunlen = (stream.Length);    //获取文件的总大小
                int offest = 0;                   //读取文件的起始位置
                while(sunlen > 0)
                {
                    if (sunlen < sendlen)
                        sendlen = Convert.ToInt32(sunlen);
                    byte[] msgdata = new byte[sendlen];
                    stream.Read(msgdata,offest,sendlen);
                    msg.sendState = SendState.Sending;
                    msg.Data = msgdata;
                    udpsocket.Send(ip,Convert.ToInt32(port),new ClassSerializers().SerializeBinary(msg).ToArray());
                    sunlen -= sendlen;
                }                ClassMsg End = new ClassMsg();
                End.sendKind = SendKind.SendCommand;                      //信息发送的类型
                End.msgCommand = MsgCommand.VideoClose;                     //发送视频中
                End.sendState = SendState.End;                            //文件发送结束
                End.SID = sid;
                End.SIP = msg.GetLocalIP();
                End.RID = revid;
                //End.msgID = msgid;
                End.Data = Encoding.Unicode.GetBytes("");
                stream.Close();
                udpsocket.Send(ip, Convert.ToInt32(port), new ClassSerializers().SerializeBinary(start).ToArray());
                SendViod = false;
            }
        }        /// <summary>
        /// 套接字托管
        /// </summary>
        public delegate void DataArrivalDelegate(byte[] Data, IPAddress Ip, int Port);
        private void udpSocket1_DataArrival(byte[] Data, IPAddress Ip, int Port)
        {
            DataArrivalDelegate outDelegate = new DataArrivalDelegate(DataArrival);
            this.BeginInvoke(outDelegate, new object[] {Data,Ip,Port});
        }
        private void DataArrival(byte[] Data, IPAddress Ip, int Port)
        {
            try
            {
                ClassMsg msg = new ClassSerializers().DeSerializeBinary(new MemoryStream(Data)) as ClassMsg;
                switch(msg.msgCommand)
                {
                    //打开视频
                    case MsgCommand.VideoOpen:
                        Voiding = true;
                        SendViod = false;
                        timer1.Enabled = true;
                        panel7.Visible = true;
                        break;
                    //正在视频中
                    case MsgCommand.Videoing:
                        GetVoid(Data, Ip, Port);
                        break;
                    //关闭视频
                    case MsgCommand.VideoClose:
                        Voiding = false;
                        break;
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }        /// <summary>
        /// 接收图片存入到指定的路劲下，并将图片显示在pictureBox2上
        /// </summary>
        private void GetVoid(byte[] Data, IPAddress Ip, int Port)
        {
            ClassMsg msg = (ClassMsg)new ClassSerializers().DeSerializeBinary(new MemoryStream(Data));
            string sid = msg.SID;
            string msgid = msg.msgID;
            switch(msg.msgCommand)      //信息的命令
            {
                //正在视频中
                case MsgCommand.Videoing:
                    {
                        switch(msg.sendState)      // 信息的状态
                        {
                            //开始发送视频文件
                            case SendState.Start:
                                {
                                    FileStream fs = null;
                                    try
                                    {
                                        string FileName = "C:\\Void.bmp";     //设置文件路径
                                        fs = File.Create(FileName);
                                        fs.Write(msg.Data,0,msg.Data.Length);
                                    }
                                    catch (Exception ex)
                                    {
                                        MessageBox.Show(ex.ToString());
                                    }
                                    finally
                                    {
                                        fs.Close();
                                    }                                    
                                }
                                break;
                            //正在发送视频文件
                            case SendState.Sending:
                                {
                                    FileStream fs = null;
                                    try
                                    {
                                        string FileName = "C:\\Void.bmp";
                                        fs = File.OpenWrite(FileName);
                                        fs.Seek(0, SeekOrigin.End);           //将该流的当前位置设为0
                                        fs.Write(msg.Data, 0, msg.Data.Length);
                                    }
                                    catch (Exception ex)
                                    {
                                        MessageBox.Show(ex.ToString());
                                    }
                                    finally
                                    {
                                        fs.Close();
                                    }
                                }
                                break;
                            //发送视频文件结束
                            case SendState.End:
                                {
                                    pictureBox2.Load("C:\\Void.bmp");
                                }
                                break;
                        }
                    }
                    break;
            }
        }        private void button_Incepl_Click(object sender, EventArgs e)
        {
            Voiding = false;
            SendViod = true;
            timer1.Enabled = false;
            panel7.Visible = false;
            viodeo.CloseWebcam();
            string dir = System.Environment.CurrentDirectory;
            dir = dir.Substring(0, dir.Length - 9);
            pictureBox1.Load(@"E:\程序\C# 项目开发\MyQQ\MyQQClient\Images\ChatImages\QQ08.jpg");
            pictureBox2.Load(@"E:\程序\C# 项目开发\MyQQ\MyQQClient\Images\ChatImages\QQ12.jpg");
        }

Answer 9

看下这个源码demo,C#完全可以搞定了,不需要调用opencv，用PictureBox时实显示视频！！！http://www.codesoso.com/code/Motion_Detection.aspx