Google Mirror API视频

Question

google glass mirror API上的视频路线图是什么？该应用编程接口是否允许像玻璃演示视频http://www.youtube.com/watch?v=v1uyQZNg2vE中所示的那样，向设备发送或从设备发送视频流？

Answer 1

没有发布Mirror API的路线图。我们开发人员预览版的部分动机就是想弄清楚这一点。

首先，为了澄清，视频中显示的流媒体是一个Google+ Hangout。这是谷歌眼镜内置的一个功能。

更新：谷歌眼镜现在支持视频流。您可以找到完整的文档here。

要添加视频流，请使用视频的URL作为其中一个部分进行多部分发布，如下所示：

POST /upload/mirror/v1/timeline HTTP/1.1
Host: www.googleapis.com
Authorization: Bearer {auth token}
Content-Type: multipart/related; boundary="mymultipartboundary"
Content-Length: {length}

--mymultipartboundary
Content-Type: application/json; charset=UTF-8

{ "text": "Skateboarding kittens" }
--mymultipartboundary
Content-Type: video/vnd.google-glass.stream-url

http://example.com/path/to/kittens.mp4
--mymultipartboundary--

Answer 2

Youtube视频流媒体是可能的。我已经使用"YoutubeExtractor“命名空间在C#.net中做到了这一点。从you tube视频中解析视频(.mp4) url并将其流式传输。下面是代码。它对我来说工作得很好。复制url时，请单击共享后获得可用的you tube链接

private static String youtubevideoStream(MainController controller)
    {

        string link = "http://youtu.be/9uYKISlL7Vg";
        IEnumerable<VideoInfo> videoInfos = DownloadUrlResolver.GetDownloadUrls(link);
        VideoInfo video = videoInfos.First(info => info.VideoType == VideoType.Mp4 && info.Resolution == 360);
        String vLink = video.DownloadUrl;


        TimelineItem videocard= new TimelineItem()
        {

            Text = "Menu Card",
            BundleId = "666",
            Notification = new NotificationConfig() { Level = "DEFAULT" },
            MenuItems = new List<MenuItem>()
                                     {
                                         new MenuItem() {Action = "DELETE"},
                                     }

        };

        String mediaLink = vLink;

        if (!String.IsNullOrEmpty(mediaLink))
        {
            Stream stream = null;
            if (mediaLink.StartsWith("/"))
            {
                stream = new StreamReader(controller.Server.MapPath(mediaLink)).BaseStream;
            }
            else
            {
                HttpWebRequest request = WebRequest.Create(mediaLink) as HttpWebRequest;

                request.UseDefaultCredentials = false;


                HttpWebResponse response = request.GetResponse() as HttpWebResponse;

                byte[] b = null;
                using (Stream streamFromWeb = response.GetResponseStream())
                using (MemoryStream ms = new MemoryStream())
                {
                    int count = 0;
                    do
                    {
                        byte[] buf = new byte[1024];
                        count = streamFromWeb.Read(buf, 0, 1024);
                        ms.Write(buf, 0, count);
                    } while (streamFromWeb.CanRead && count > 0);
                    b = ms.ToArray();

                    stream = new MemoryStream(b);
                }
            }
            controller.Service.Timeline.Insert(videocard, stream, "video/mp4").Upload();
        }
        else
        {
            controller.Service.Timeline.Insert(videocard).Fetch();
        }