Added new subtitle format

src/Logic/SubtitleFormats/AdvancedSubStationAlpha.cs

@@ -994,6 +994,9 @@ Format: Layer, Start, End, Style, Actor, MarginL, MarginR, MarginV, Effect, Text
 
         public static string CheckForErrors(string header)
         {
+            if (string.IsNullOrEmpty(header))
+                return string.Empty;
+
             var sb = new StringBuilder();
 
             int styleCount = -1;

src/Logic/SubtitleFormats/SubtitleFormat.cs

@@ -214,6 +214,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
                     new UnknownSubtitle69(),
                     new UnknownSubtitle70(),
                     new UnknownSubtitle71(),
+                    new UnknownSubtitle72(),
                 };
 
                 string path = Configuration.PluginsDirectory;

src/Logic/SubtitleFormats/UnknownSubtitle72.cs

@@ -0,0 +1,131 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Text.RegularExpressions;
+
+namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
+{
+    public class UnknownSubtitle72 : SubtitleFormat
+    {
+        //00:00:02.000
+        //Junior Semifinal, part 1
+        //Aidiba Talamunuer, Berezan
+        //Bogdan Voloshin, Yaroslavl
+        //Alexandr Doronin, Almaty
+
+        //00:04:41.480
+        //G. Zhubanova
+        //«Kui»
+        //Aidiba Talamunuer, Berezan
+
+        //00:05:55.000
+        //N. Mendigaliev
+        //«Steppe»
+        //Bogdan Voloshin, Yaroslavl
+
+        static readonly Regex RegexTimeCodes = new Regex(@"^\d\d:\d\d:\d\d.\d\d\d$", RegexOptions.Compiled);
+
+        public override string Extension
+        {
+            get { return ".txt"; }
+        }
+
+        public override string Name
+        {
+            get { return "Unknown 72"; }
+        }
+
+        public override bool IsTimeBased
+        {
+            get { return true; }
+        }
+
+        public override bool IsMine(List<string> lines, string fileName)
+        {
+            var subtitle = new Subtitle();
+            LoadSubtitle(subtitle, lines, fileName);
+            return subtitle.Paragraphs.Count > _errorCount;
+        }
+
+        public override string ToText(Subtitle subtitle, string title)
+        {
+            const string paragraphWriteFormat = "{0}\r\n{1}\r\n";
+
+            var sb = new StringBuilder();
+            foreach (Paragraph p in subtitle.Paragraphs)
+            {
+                sb.AppendLine(string.Format(paragraphWriteFormat, p.StartTime.ToString().Replace(",","."), p.Text));
+            }
+            return sb.ToString().Trim();
+        }
+
+        public override void LoadSubtitle(Subtitle subtitle, List<string> lines, string fileName)
+        {
+            Paragraph paragraph = null;
+            _errorCount = 0;
+            subtitle.Paragraphs.Clear();
+            for (int i = 0; i < lines.Count; i++)
+            {
+                string line = lines[i].TrimEnd();
+
+                if (line.Contains(":") && RegexTimeCodes.IsMatch(line))
+                {
+                    if (paragraph != null && string.IsNullOrEmpty(paragraph.Text))
+                        _errorCount++;
+
+                    paragraph = new Paragraph();
+                    if (TryReadTimeCodesLine(line, paragraph))
+                    {
+                        subtitle.Paragraphs.Add(paragraph);
+                    }
+                    else
+                    {
+                        _errorCount++;
+                    }
+                }
+                else if (paragraph != null && paragraph.Text.Length < 1000)
+                {
+                    paragraph.Text = (paragraph.Text + Environment.NewLine + line).Trim();
+                }
+                else
+                {
+                    _errorCount++;
+                }
+            }
+
+            int index = 0;
+            foreach (Paragraph p in subtitle.Paragraphs)
+            {
+                index++;
+                p.Text = p.Text.Replace(Environment.NewLine + Environment.NewLine, Environment.NewLine);
+                Paragraph nextParagraph = subtitle.GetParagraphOrDefault(index);
+                p.EndTime.TotalMilliseconds = p.StartTime.TotalMilliseconds + Utilities.GetOptimalDisplayMilliseconds(p.Text) + 100;
+                if (nextParagraph != null && p.EndTime.TotalMilliseconds >= nextParagraph.StartTime.TotalMilliseconds)
+                {
+                    p.EndTime.TotalMilliseconds = nextParagraph.StartTime.TotalMilliseconds - 1;
+                }
+            }
+            subtitle.Renumber(1);
+        }
+
+        private bool TryReadTimeCodesLine(string line, Paragraph paragraph)
+        {
+            string[] parts = line.Split(':', '.');
+            try
+            {
+                int startHours = int.Parse(parts[0]);
+                int startMinutes = int.Parse(parts[1]);
+                int startSeconds = int.Parse(parts[2]);
+                int startMilliseconds = int.Parse(parts[3]);
+                paragraph.StartTime = new TimeCode(startHours, startMinutes, startSeconds, startMilliseconds);
+                return true;
+            }
+            catch
+            {
+                return false;
+            }
+        }
+
+    }
+}
+

src/Logic/SubtitleFormats/UnknownSubtitle8.cs

@@ -72,6 +72,10 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
                         _errorCount++;
                     }
                 }
+                else
+                {
+                    _errorCount++;
+                }
             }
 
             foreach (Paragraph p in subtitle.Paragraphs)

src/SubtitleEdit.csproj

@@ -913,6 +913,7 @@
     <Compile Include="Logic\SubtitleFormats\SwiftTextLineNumber .cs" />
     <Compile Include="Logic\SubtitleFormats\Titra.cs" />
     <Compile Include="Logic\SubtitleFormats\UnknownSubtitle69.cs" />
+    <Compile Include="Logic\SubtitleFormats\UnknownSubtitle72.cs" />
     <Compile Include="Logic\SubtitleFormats\WebVTTFileWithLineNumber.cs" />
     <Compile Include="Logic\SubtitleFormats\FinalCutProXmlGap.cs" />
     <Compile Include="Logic\SubtitleFormats\UnknownSubtitle66.cs" />