先上图片，看看效果

首先是wp有自带的mjpeg解码功能
能输出WriteableBitmap格式，方便接下来进行图像分析
速度还行，最大也只是100多MS的延迟
接收图像方法
public void recVideo()
        {
            string sourceURL = "图片流地址";
            while (true)
            {
                HttpWebRequest req = (HttpWebRequest)WebRequest.Create(new Uri(sourceURL));
                req.BeginGetResponse(new AsyncCallback(resResult), req);
                //Thread.Sleep(10);
            }
        }
异步调用方法
      private void resResult(IAsyncResult ir)
        {
            try
            {
                HttpWebRequest req = ir.AsyncState as HttpWebRequest;
                WebResponse resp = req.EndGetResponse(ir);
                Stream stream = resp.GetResponseStream();
                Dispatcher.BeginInvoke(() =>
                {
                    WriteableBitmap myBitmap = PictureDecoder.DecodeJpeg(stream);    这里就是自带的解码方法，一句话就行了，如果只要实现视频输出，下面图像识别就可以删掉了
                    image1.Source = myBitmap;
                    #region 图像识别
                    var w = myBitmap.PixelWidth;
                    var h = myBitmap.PixelHeight;
                    if (_pixelDataGray == null || _pixelDataGray.Length != h * w)
                    {
//定义了几个数组
                        _pixelDataGray = new byte[w / _downsampleFactor * h / _downsampleFactor];
                        _pixelDataDownsampled =
                            new byte[w / _downsampleFactor * h / _downsampleFactor];
                        _pixelDataGrayInt = new int[w / _downsampleFactor * h / _