YouTubeExtractor

Overview

YoutubeExtractor is a reusable library for .NET, written in C#, that allows to download videos from YouTube and/or extract their audio track (currently only for flash videos).

The original project, youtubeFisher, is a pure GUI application, but there was the need for a reusable library.

Authors

All credits go to the youtubeFisher project.

I, flagbug, just extracted the code out of this project, cleaned it up and packaged it into reusable classes.

License

YouTubeExtractor is licenced under the GNU General Public License version 2 (GPLv2)

Dependencies

• .NET Framework 3.5
• JSON.NET

NuGet

YoutubeExtractor is available on NuGet!

Projects that use this library

• Espera

Example code

Get the download URLs

	// Our test youtube link
	const string link = "http://www.youtube.com/watch?v=6bMmhKz6KXg";
	
	/*
	 * 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 standard youtube quality
	 * See the VideoFormat enum for more info about the quality.
	 */
	VideoInfo video = videoInfos
	    .First(info => info.VideoFormat == VideoFormat.Standard360);
	
	/*
	 * Create the video downloader.
	 * The first argument is the video to download.
	 * The second argument is the path to save the video file.
	 * Automatic video title infering will be supported later.
	 */
	var videoDownloader = new VideoDownloader(video, "D:/Downloads/test" + video.VideoExtension);
	
	// Register the ProgressChanged event and print the current progress
	videoDownloader.ProgressChanged += (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 flash (only flash audio extraction is currently supported)
	 * video with the highest audio quality.
	 * See the VideoFormat enum for more info about the quality.
	 */
	VideoInfo video = videoInfos
	    .Where(info => info.CanExtractAudio)
	    .First(info =>
	           info.VideoFormat == VideoFormat.FlashAacHighQuality ||
	           info.VideoFormat == VideoFormat.FlashAacLowQuality ||
	           info.VideoFormat == VideoFormat.FlashMp3HighQuality ||
	           info.VideoFormat == VideoFormat.FlashMp3LowQuality);
	
	/*
	 * 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.
	 * Automatic video title infering will be supported later.
	 */
	var audioDownloader = new AudioDownloader(video, "D:/Downloads/test" + video.AudioExtension);
	
	// Register the ProgressChanged event and print the current progress
	audioDownloader.ProgressChanged += (sender, args) => Console.WriteLine(args.ProgressPercentage);
	
	/*
	 * Execute the audio downloader.
	 * For GUI applications note, that this method runs synchronously.
	 */
	audioDownloader.Execute();