从提取的url流YouTube视频

Question

private string ExtractVideoUrl(string youtubeUrl)
    {
        IEnumerable<VideoInfo> videoInfos = DownloadUrlResolver.GetDownloadUrls(youtubeUrl, false);
        var video = videoInfos.First();
        if (video.RequiresDecryption)
        {
            DownloadUrlResolver.DecryptDownloadUrl(video);
        }

        return video.DownloadUrl;       // videoInfos.First().DownloadUrl;
    }

var request = (HttpWebRequest)WebRequest.Create(this.Video.DownloadUrl);
        if (this.BytesToDownload.HasValue)
        {
            request.AddRange(0, this.BytesToDownload.Value - 1);
        }

        // the following code is alternative, you may implement the function after your needs
        using (WebResponse response = request.GetResponse())
        {
            using (Stream source = response.GetResponseStream())
            {
            **// HOW to Play source stream???**
                using (FileStream target = File.Open(this.SavePath, FileMode.Create, FileAccess.Write))
                {
                    var buffer = new byte[1024];
                    bool cancel = false;
                    int bytes;
                    int copiedBytes = 0;

                    while (!cancel && (bytes = source.Read(buffer, 0, buffer.Length)) > 0)
                    {
                        target.Write(buffer, 0, bytes);
                        .... 

所以一般的问题是如何从开放流中播放视频？例如Chrome、Firefox和KMPlayer都很容易做到这一点。浏览器生成一个带有视频标签的简单页面，因此通过JS来管理播放器将是微不足道的。但是...内部WebBrowser控件不能，它建议下载文件。我尝试了CEFSharp（Chrome嵌入式框架），但没有成功。也许有人知道好的视频播放器WPF库，可以流视频吗？我也尝试了vlc.wpf和Shockwave Flash，但仍然对这个提取出来的URL不满意。搜索了很多，但结果还不够。

Answer 1

null

<xmlns:gecko="clr-namespace:Gecko;assembly=Geckofx-Winforms">
....
<WindowsFormsHost Width="400" Height="300" HorizontalAlignment="Stretch"  VerticalAlignment="Stretch" >
                <gecko:GeckoWebBrowser x:Name="_geckoBrowser"/>
            </WindowsFormsHost>

public void PlayVideo(string videoId)
    {                        
        var url = string.Format("https://www.youtube.com/watch?v={0}", videoId);
        var videoUrl = ExtractVideoUrl(url);

        _geckoBrowser.Navigate(videoUrl);
    }