public override void DownloadAndParseData()
{
string info = streamDownloader.Download(DataUrl);
var infoColletion = HttpUtility.ParseQueryString(info);
Title = infoColletion["title"];
if (string.IsNullOrEmpty(Title))
{
Title = HttpUtility.ParseQueryString(new Uri(BaseUrl).Query)["v"];
}
Duration = string.IsNullOrEmpty(infoColletion["length_seconds"]) ? 0 : int.Parse(infoColletion["length_seconds"]);
var availableFormats = infoColletion["url_encoded_fmt_stream_map"];
if (availableFormats == string.Empty)
{
return;
}
var formatList = new List <string>(Regex.Split(availableFormats, VideoUrlsSeparator));
//formatList.ForEach(format =>
//{
// if (string.IsNullOrEmpty(format.Trim()))
// return;
// var formatInfoCollection = HttpUtility.ParseQueryString(format);
// var urlEncoded = formatInfoCollection["url"];
// var itag = formatInfoCollection["itag"];
// var quality = formatInfoCollection["quality"];
// var signature = formatInfoCollection["sig"];
// var fallbackHost = formatInfoCollection["fallback_host"];
// var formatCode = int.Parse(itag);
// urlEncoded = string.Format("{0}&fallback_host={1}&signature={2}", urlEncoded, fallbackHost, signature);
// var url = new Uri(HttpUtility.UrlDecode(HttpUtility.UrlDecode(urlEncoded)));
// Streams.Add(new YouTubeStreamInfo(url.ToString(), quality, formatCode));
//});
var hdFormats = infoColletion["adaptive_fmts"];
formatList = new List <string>(Regex.Split(hdFormats, VideoUrlsSeparator));
formatList.ForEach(format =>
{
if (string.IsNullOrEmpty(format.Trim()))
{
return;
}
var formatInfoCollection = HttpUtility.ParseQueryString(format);
var urlEncoded = formatInfoCollection["url"];
var itag = formatInfoCollection["itag"];
var quality = formatInfoCollection["quality_label"];
var signature = formatInfoCollection["sig"];
var bitrate = formatInfoCollection["bitrate"];
var bandwidth = string.IsNullOrEmpty(bitrate) ? 0 : int.Parse(bitrate);
var fallbackHost = formatInfoCollection["fallback_host"];
var formatCode = int.Parse(itag);
urlEncoded = $"{urlEncoded}&fallback_host={fallbackHost}&signature={signature}";
var url = new Uri(HttpUtility.UrlDecode(HttpUtility.UrlDecode(urlEncoded)));
var stream = new YouTubeStreamInfo(url.ToString(), quality, formatCode)
{
Bandwidth = bandwidth,
ApproxSize = (Duration * (bandwidth / 1024) / 1024 / 8)
};
Streams.Add(stream);
Debug.WriteLine("Found stream id={0} quality={1}", stream.FormatCode, stream.Quality);
});
var bestMpaAudio = Streams.Cast <YouTubeStreamInfo>()
.Where(s => s.FormatCode >= 139 && s.FormatCode <= 141)
.OrderByDescending(s => s.FormatCode).FirstOrDefault();
var bestWebMAudio = Streams.Cast <YouTubeStreamInfo>()
.Where(s => s.FormatCode >= 170 && s.FormatCode <= 171)
.OrderByDescending(s => s.FormatCode).FirstOrDefault();
//If we have separate audio streams then select the best for later muxing.
//If not then hope there is audio in the stream..
//WebM & Mp4 Video only
Streams.Cast <YouTubeStreamInfo>().Where(s => s.FileEnding == ".mp4")
.ToList().ForEach(s =>
{
if (bestMpaAudio != null)
{
s.AudioUrl = bestMpaAudio.AudioUrl;
s.StreamType = StreamType.VideoSeparateAudio;
}
});
Streams.Cast <YouTubeStreamInfo>().Where(s => s.FileEnding == ".webm")
.ToList().ForEach(s =>
{
if (bestWebMAudio != null)
{
s.AudioUrl = bestWebMAudio.AudioUrl;
s.StreamType = StreamType.VideoSeparateAudio;
}
});
Streams.Reverse();
Streams.RemoveAll(s => s.Resolution.Contains("Unknown"));
PosterUrl = infoColletion["thumbnail_url"];
if (!string.IsNullOrEmpty(PosterUrl))
{
PosterImage = streamDownloader.DownloadImage(PosterUrl);
}
}
public IEnumerable <IDAQStream> StreamsOfType(StreamType streamType)
{
return(Streams.Cast <HekaDAQStream>().Where(x => x.ChannelType == streamType));
}
