YoutubeExtractor is a library for .NET, written in C#, that allows to download videos from YouTube and/or extract their audio track (audio extraction currently only for flash videos).
Note that Windows Phone 8, WinRT, Xamarin.Android and Xamarin.iOS only support the extraction of the download URLs
Install-Package YoutubeExtractor
YoutubeExtractor has two licenses;
The YouTube URL-extraction code is licensed under the MIT License
The audio extraction code that is originally from FlvExtract is licenced under the GNU General Public License version 2 (GPLv2)
Files that are GPLv2 licensed are explicitly marked with the GPLv2 header at the top of the file. All other files are implicitly MIT licensed.
Get the download URLs
// Our test youtube link string link = "insert youtube link"; /* * Get the available video formats. * We'll work with them in the video and audio download examples. */ IEnumerable<VideoInfo> videoInfos = DownloadUrlResolver.GetDownloadUrls(link);
Download the video
/*
* Select the first .mp4 video with 360p resolution
*/
VideoInfo video = videoInfos
.First(info => info.VideoType == VideoType.Mp4 && info.Resolution == 360);
/*
* If the video has a decrypted signature, decipher it
*/
if (video.RequiresDecryption)
{
DownloadUrlResolver.DecryptDownloadUrl(video);
}
/*
* Create the video downloader.
* The first argument is the video to download.
* The second argument is the path to save the video file.
*/
var videoDownloader = new VideoDownloader(video, Path.Combine("D:/Downloads", video.Title + video.VideoExtension));
// Register the ProgressChanged event and print the current progress
videoDownloader.DownloadProgressChanged += (sender, args) => Console.WriteLine(args.ProgressPercentage);
/*
* Execute the video downloader.
* For GUI applications note, that this method runs synchronously.
*/
videoDownloader.Execute();
Download the audio track
/*
* We want the first extractable video with the highest audio quality.
*/
VideoInfo video = videoInfos
.Where(info => info.CanExtractAudio)
.OrderByDescending(info => info.AudioBitrate)
.First();
/*
* If the video has a decrypted signature, decipher it
*/
if (video.RequiresDecryption)
{
DownloadUrlResolver.DecryptDownloadUrl(video);
}
/*
* Create the audio downloader.
* The first argument is the video where the audio should be extracted from.
* The second argument is the path to save the audio file.
*/
var audioDownloader = new AudioDownloader(video, Path.Combine("D:/Downloads", video.Title + video.AudioExtension));
// Register the progress events. We treat the download progress as 85% of the progress and the extraction progress only as 15% of the progress,
// because the download will take much longer than the audio extraction.
audioDownloader.DownloadProgressChanged += (sender, args) => Console.WriteLine(args.ProgressPercentage * 0.85);
audioDownloader.AudioExtractionProgressChanged += (sender, args) => Console.WriteLine(85 + args.ProgressPercentage * 0.15);
/*
* Execute the audio downloader.
* For GUI applications note, that this method runs synchronously.
*/
audioDownloader.Execute();
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