Streams youtube live to Ffmpeg

YoutubeLive.cs

//Created by Spike2147 (Mordecaii95 on Github)
//Please credit if you use!
//If this goes in violation of any terms and conditions, please contact me directly.
public class YoutubeLive
{


	//src: https://gist.github.com/Boztown/8060963
	public static string IdFromUrl(string url)
	{
		return Regex.Match(url, @"(?:youtube\.com\/(?:[^\/]+\/.+\/|(?:v|e(?:mbed)?)\/|.*[?&]v=)|youtu\.be\/)([^""&?\/ ]{11})").Groups[1].Value;
	}

	private static async Task<string> GetM3U8(string id, int quality = 95)
	{
		HttpClient client = new HttpClient();
		string m3u8 = HttpUtility.HtmlDecode(await client.GetStringAsync($"https://www.youtube.com/get_video_info?&video_id={id}&el=info&ps=default&eurl=&gl=US&hl=en"));
		NameValueCollection nvc = HttpUtility.ParseQueryString(m3u8);
		m3u8 = await client.GetStringAsync(nvc["hlsvp"]);
		string[] split = m3u8.Split(new[] { "\r\n", "\r", "\n" }, StringSplitOptions.RemoveEmptyEntries);
		string url = "";
		for (int i = 0; i < split.Length; i++)
		{
			if (!split[i].StartsWith("#EXT-X-STREAM-INF"))
				continue;
			Dictionary<string, string> m3uparams = M3U8Params(split[i]);
			if (!m3uparams["codecs"].Contains("mp4"))
				continue;
			if (GetITag(split[i + 1]) != quality)
				continue;
			url = split[i + 1];
			break;
		}
		return url;
	}

	private static int GetITag(string url)
	{
		return int.Parse(Regex.Match(url, @"itag/(\d+)").Groups[1].Value);
	}

	private static Dictionary<string, string> M3U8Params(string extstream)
	{
		return Regex.Split(extstream.Replace("#EXT-X-STREAM-INF:", ""), ",(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)").Where(x => !string.IsNullOrEmpty(x)).Select(value => value.Split('=')).ToDictionary(pair => pair[0].ToLower(), pair => pair[1].Replace("\"", ""));
	}

	public static async Task<Process> GetFfmpeg(string url)
	{
		string id = IdFromUrl(url);
		string m3u = await GetM3U8(id);
		ProcessStartInfo ffmpeg = new ProcessStartInfo
		{
			FileName = "ffmpeg",
			//Arguments = $"-xerror -i \"{m3u}\" -ac 2 -f s16le -ar 48000 pipe:1",
			Arguments = $"-xerror -i \"{m3u}\" -c copy -bsf:a aac_adtstoasc output.mp4",
			UseShellExecute = false,
			RedirectStandardOutput = true
		};
		return Process.Start(ffmpeg);
	}
}