private async Task <YoutubeVideoCache> GetCacheAsync()
{
var result = YoutubeVideoCache.Load(Code);
if (result != null)
{
return(result);
}
try {
Console.WriteLine($"{Code}:Begin");
var youTube = new YoutubeClient();
var streamManifest = await youTube.Videos.Streams.GetManifestAsync(Code);
var streamInfo = streamManifest.GetMuxed();
Console.WriteLine($"{Code}:Got videos list");
result = new YoutubeVideoCache {
Hash = Code
};
var videosToDownload = streamInfo;
videoDownloaders = videosToDownload
.Select(x => DownloadVideoAsync(youTube, x, result));
await Task.WhenAll(videoDownloaders);
result.Mips = new Dictionary <int, string>(videosToDownload
.Select(x => new KeyValuePair <int, string>(x.Resolution.Height, FileNameFormatter(result, x)))
.OrderBy(x => x.Key));
result.Save();
} catch (Exception ex) {
Log.Error.Here(ex.Message);
Environment.Exit(1);
}
return(result);
}
private async Task DownloadVideoAsync(YoutubeClient youTube, MuxedStreamInfo streamInfo, YoutubeVideoCache cache)
{
Utils.CreateDirectory(cache.Directory);
var path = Path.Combine(cache.Directory, FileNameFormatter(cache, streamInfo));
if (File.Exists(path))
{
return;
}
Console.WriteLine($"{Code}: start download {path}");
await youTube.Videos.Streams.DownloadAsync(streamInfo, path);
Console.WriteLine($"{Code}: download {path} done.");
}
private static string FileNameFormatter(YoutubeVideoCache cache, MuxedStreamInfo streamInfo) =>
$"{cache.Hash}_{streamInfo.Resolution.Height}.{streamInfo.Container}";