private static TwitchPlaylist ParseV4(string tempDir, List <string> lines, string urlPrefix)
        {
            TwitchPlaylist playlist = new TwitchPlaylist();

            int    partCounter    = 0;
            double lengthBuffer   = 0;
            string currentPartStr = null;

            for (int i = 0; i < lines.Count; i++)
            {
                string line = lines[i];

                if (line.StartsWith("#EXTINF", StringComparison.OrdinalIgnoreCase))
                {
                    string partStr = lines[i + 2];

                    if (string.IsNullOrWhiteSpace(currentPartStr))
                    {
                        currentPartStr = partStr;
                    }

                    if (!currentPartStr.Equals(partStr))
                    {
                        playlist.Add(new TwitchPlaylistPart(lengthBuffer, urlPrefix + currentPartStr, Path.Combine(tempDir, partCounter.ToString("D8") + ".ts")));
                        currentPartStr = partStr;
                        lengthBuffer   = 0;
                        partCounter++;
                    }

                    lengthBuffer += Math.Max(double.Parse(line.Substring(line.LastIndexOf(":") + 1).TrimEnd(','), NumberStyles.Any, CultureInfo.InvariantCulture), 0);

                    i++;
                }
            }

            if (!string.IsNullOrWhiteSpace(currentPartStr) && lengthBuffer > 0)
            {
                playlist.Add(new TwitchPlaylistPart(lengthBuffer, urlPrefix + currentPartStr, Path.Combine(tempDir, partCounter.ToString("D8") + ".ts")));
            }

            return(playlist);
        }
        private static TwitchPlaylist ParseV3(string tempDir, List <string> lines, string urlPrefix)
        {
            TwitchPlaylist playlist = new TwitchPlaylist();

            int partCounter = 0;

            for (int i = 0; i < lines.Count; i++)
            {
                string line = lines[i];

                if (line.StartsWith("#EXTINF", StringComparison.OrdinalIgnoreCase))
                {
                    double length = Math.Max(double.Parse(line.Substring(line.LastIndexOf(":") + 1).TrimEnd(','), NumberStyles.Any, CultureInfo.InvariantCulture), 0);

                    playlist.Add(new TwitchPlaylistPart(length, urlPrefix + lines[i + 1], Path.Combine(tempDir, partCounter.ToString("D8") + ".ts")));
                    partCounter++;
                    i++;
                }
            }

            return(playlist);
        }