来自IP cam C＃的流

我有以下代码无效。 我的camUrl链接可以正常工作，如果我加载到Firefox并从我的摄像头流，但在运行时我的camUrl没有显示任何内容。 有什么想法吗？

  public Thread _camThread; private string camUrl = "http://my-domain-ip:2080/videostream.cgi?user=admin&pwd=password"; public HttpWebRequest webReq; public WebResponse webRes; public Stream sr; private void btnStart_Click(object sender, EventArgs e) { if (_camThread == null) _camThread = new Thread(new ThreadStart(RunCam)); _camThread.Start(); } private void RunCam() { try { webReq = (HttpWebRequest)WebRequest.Create(camUrl); webReq.AllowWriteStreamBuffering = true; webReq.Timeout = 20000; using (webRes = webReq.GetResponse()) { while ((sr = webRes.GetResponseStream()) != null) { image.Image = Image.FromStream(sr); } } } catch (Exception ex) { MessageBox.Show(ex.Message); } } private void btnStop_Click(object sender, EventArgs e) { if (_camThread.IsAlive) { _camThread.Abort(); _camThread = null; } } 

Answer 1

看起来您从响应流中读取的循环不正确。 您只能从响应中获得一个流，并且它上面会有多个图像。

您可能无法直接将响应流传递给Image.FromStream – 图像可能以多部分响应进行编码，该响应将图像与文本分隔符分开。 您可以在RFC2046中了解有关多部分响应格式的更多信息。

 using (webRes = webReq.GetResponse()) { using (sr = webRes.GetResponseStream()) { // continuously read images from the response stream until error while (true) { try { // note: the line below probably won't work, you may need to parse // the next image from the multi-part response stream manually image.Image = Image.FromStream(sr); // if the above doesn't work, then do something like this: // var imageBytes = ParseNextImage(sr); // var memoryStream = new MemoryStream(imageBytes); // image.Image = Image.FromStream(memoryStream); } catch(Exception e) { Console.WriteLine("Aborting read from response stream due to error {0}", e); break; } } } } 

Answer 2

camUrl返回图像吗？

尝试调试sr = webRes.GetResponseStream() ，如果它不为null，请尝试image.Update()或image.Update()

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