DxPackNet 5.视频高质量的压缩和传输

DxPackNet 对视频的压缩和解压也提供了很好的支持，且系统不需要装第三方解码器哦~

主要用到了 IxVideoEncoder 视频编码器  和 IxVideoDecoder 两个接口

 这里只做简单的组件功能使用介绍，实际应用中可能涉及到 UDP分包，包顺序控制，

音视频传输协议制定， P2P，这就不在本文的讨论范围

        private void Form1_Load(object sender, EventArgs e)
        {
           
            server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
            server.Bind(new IPEndPoint(IPAddress.Parse("127.0.0.1"), 38000));//绑定端口号
            threadRecv = new Thread(new ThreadStart(ReviceMsg));
            threadRecv.Start();

            client = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
            svpoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 38000);

            //初始化视频编码环境
            IxVideoCoderEnv Env = DxFactory.CreateDxCompent<IxVideoCoderEnv>();
            Env.Init();
            //创建编码器
            encoder = DxFactory.CreateDxCompent<IxVideoEncoder>();
            encoder.Quant = 30;//视频质量 0~31 之间的数字 越小画质越好， 越大越流畅
            //创建解码器
            decoder = DxFactory.CreateDxCompent<IxVideoDecoder>();

            cameras = DxFactory.CreateDxCompent<DxDeviceCollection>(DxDeviceCollection.ENVIRONMENT_CAMERAS);
            camCapture = DxFactory.CreateDxCompent<IDxCameraCapture>(this, panel1);
            camCapture.FrameCb = camerasFrameCb;
            camCapture.Init(cameras[0]);


        }
        byte[] outBuffer = new byte[1024 * 1024 * 2];//2M
        byte[] imgBuffer = new byte[1024 * 1024 * 2];//2M
        private void camerasFrameCb(byte[] buffer, int size)
        {
            Array.Clear(outBuffer, 0, outBuffer.Length);
            //压缩视频流
            int outSz = encoder.Encode(buffer, size, outBuffer);
            client.SendTo(outBuffer,outSz,SocketFlags.None,svpoint);//客户端发送压缩后的视频流
        }
        private void ReviceMsg() //服务端接收视频流后解压显示
        {
            byte[] bufferRecv=new byte[1024 * 1024 * 2];////2M
            while (!bExit)
            {
                if (server.Poll(0, SelectMode.SelectRead))
                {
                    EndPoint clpoint1 = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 38000);
                    //接收压缩流
                    int revLen = server.ReceiveFrom(bufferRecv, SocketFlags.None, ref clpoint1);
                    reviceSize += revLen;
                    Array.Clear(imgBuffer, 0, imgBuffer.Length);
                    //解压缩视频流
                    int outSz = decoder.Decode(bufferRecv, revLen, imgBuffer);
                    this.BeginInvoke(new camerasFrameCbHandler(_camerasFrameCb), imgBuffer, 640 * 480 * 3);
                }
            }
        }

        delegate void camerasFrameCbHandler(byte[] buffer, int size);
        public void _camerasFrameCb(byte[] buffer, int size)
        {
            //将视频流转换为帧图片
            Bitmap bmp = camCapture.BmpFromBuffer(buffer, size);
            if (bmp != null)
            {
                Image oimg = pictureBox1.Image;
                pictureBox1.Image = bmp;
                if (oimg != null) oimg.Dispose();
            }
        }

 效果图:

最后附上demo VideoTransferDemo.zip