New: Parse subtitle titles

Closes #5955

src/NzbDrone.Core.Test/Datastore/Migration/198_parse_titles_from_existing_subtitle_filesFixture.cs

@@ -0,0 +1,100 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using Dapper;
+using FluentAssertions;
+using NUnit.Framework;
+using NzbDrone.Common.Serializer;
+using NzbDrone.Core.Datastore.Migration;
+using NzbDrone.Core.Test.Framework;
+
+namespace NzbDrone.Core.Test.Datastore.Migration
+{
+    [TestFixture]
+    public class parse_title_from_existing_subtitle_filesFixture : MigrationTest<parse_title_from_existing_subtitle_files>
+    {
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].testtitle.default.eng.forced.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "testtitle", 0)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].eng.default.testtitle.forced.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "testtitle", 0)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].default.eng.testtitle.forced.ass", "Name (2020)/Season 1/Name (2020).mkv", "testtitle", 0)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].testtitle.forced.eng.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "testtitle", 0)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].eng.forced.testtitle.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "testtitle", 0)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].forced.eng.testtitle.ass", "Name (2020)/Season 1/Name (2020).mkv", "testtitle", 0)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].testtitle.default.fra.forced.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "testtitle", 0)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].fra.default.testtitle.forced.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "testtitle", 0)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].default.fra.testtitle.forced.ass", "Name (2020)/Season 1/Name (2020).mkv", "testtitle", 0)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].testtitle.forced.fra.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "testtitle", 0)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].fra.forced.testtitle.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "testtitle", 0)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].forced.fra.testtitle.ass", "Name (2020)/Season 1/Name (2020).mkv", "testtitle", 0)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].default.forced.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", null, 0)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].default.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", null, 0)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", null, 0)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].testtitle.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", null, 0)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].testtitle - 3.default.eng.forced.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "testtitle", 3)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].testtitle - 3.forced.eng.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "testtitle", 3)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].eng.forced.testtitle - 3.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "testtitle", 3)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].fra.default.testtitle - 3.forced.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "testtitle", 3)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].3.default.eng.forced.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", null, 3)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].3.forced.eng.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", null, 3)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].eng.forced.3.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", null, 3)]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].fra.default.3.forced.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", null, 3)]
+        public void should_process_file_with_missing_title(string subtitlePath, string episodePath, string title, int copy)
+        {
+            var now = DateTime.UtcNow;
+
+            var db = WithDapperMigrationTestDb(c =>
+            {
+                c.Insert.IntoTable("SubtitleFiles").Row(new
+                {
+                    SeriesId = 1,
+                    SeasonNumber = 1,
+                    EpisodeFileId = 1,
+                    RelativePath = subtitlePath,
+                    Added = now,
+                    LastUpdated = now,
+                    Extension = Path.GetExtension(subtitlePath),
+                    Language = 10,
+                    LanguageTags = new List<string> { "sdh" }.ToJson()
+                });
+
+                c.Insert.IntoTable("EpisodeFiles").Row(new
+                {
+                    Id = 1,
+                    SeriesId = 1,
+                    RelativePath = episodePath,
+                    OriginalFilePath = string.Empty,
+                    Quality = new { }.ToJson(),
+                    Size = 0,
+                    DateAdded = now,
+                    SeasonNumber = 1,
+                    Languages = new List<int> { 1 }.ToJson()
+                });
+            });
+
+            var files = db.Query<SubtitleFile198>("SELECT * FROM \"SubtitleFiles\"").ToList();
+
+            files.Should().HaveCount(1);
+
+            files.First().Title.Should().Be(title);
+            files.First().Copy.Should().Be(copy);
+            files.First().LanguageTags.Should().NotContain("sdh");
+            files.First().Language.Should().NotBe(10);
+        }
+    }
+
+    public class SubtitleFile198
+    {
+        public int Id { get; set; }
+        public int SeriesId { get; set; }
+        public int? EpisodeFileId { get; set; }
+        public int? SeasonNumber { get; set; }
+        public string RelativePath { get; set; }
+        public DateTime Added { get; set; }
+        public DateTime LastUpdated { get; set; }
+        public string Extension { get; set; }
+        public int Language { get; set; }
+        public int Copy { get; set; }
+        public string Title { get; set; }
+        public List<string> LanguageTags { get; set; }
+    }
+}

src/NzbDrone.Core.Test/MediaFiles/EpisodeImport/Aggregation/Aggregators/AggregateSubtitleInfoFixture.cs

@@ -0,0 +1,48 @@
+using FluentAssertions;
+using NUnit.Framework;
+using NzbDrone.Core.MediaFiles;
+using NzbDrone.Core.MediaFiles.EpisodeImport.Aggregation.Aggregators;
+using NzbDrone.Core.Test.Framework;
+
+namespace NzbDrone.Core.Test.MediaFiles.EpisodeImport.Aggregation.Aggregators
+{
+    [TestFixture]
+    public class AggregateSubtitleInfoFixture : CoreTest<AggregateSubtitleInfo>
+    {
+        [TestCase("Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "", "Name (2020) - S01E20 - [AAC 2.0].default.eng.forced.ass")]
+        [TestCase("Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "", "Name (2020) - S01E20 - [AAC 2.0].eng.default.ass")]
+        [TestCase("Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "", "Name (2020) - S01E20 - [AAC 2.0].fra.ass")]
+        [TestCase("", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "Name (2020) - S01E20 - [AAC 2.0].default.eng.forced.ass")]
+        [TestCase("", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "Name (2020) - S01E20 - [AAC 2.0].eng.default.ass")]
+        [TestCase("", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", "Name (2020) - S01E20 - [AAC 2.0].fra.ass")]
+        public void should_do_basic_parse(string relativePath, string originalFilePath, string path)
+        {
+            var episodeFile = new EpisodeFile
+            {
+                RelativePath = relativePath,
+                OriginalFilePath = originalFilePath
+            };
+
+            var subtitleTitleInfo = Subject.CleanSubtitleTitleInfo(episodeFile, path);
+
+            subtitleTitleInfo.Title.Should().BeNull();
+            subtitleTitleInfo.Copy.Should().Be(0);
+        }
+
+        [TestCase("Default (2020)/Season 1/Default (2020) - S01E20 - [AAC 2.0].mkv", "Default (2020) - S01E20 - [AAC 2.0].default.eng.forced.ass")]
+        [TestCase("Default (2020)/Season 1/Default (2020) - S01E20 - [AAC 2.0].mkv", "Default (2020) - S01E20 - [AAC 2.0].eng.default.ass")]
+        [TestCase("Default (2020)/Season 1/Default (2020) - S01E20 - [AAC 2.0].mkv", "Default (2020) - S01E20 - [AAC 2.0].default.eng.testtitle.forced.ass")]
+        [TestCase("Default (2020)/Season 1/Default (2020) - S01E20 - [AAC 2.0].mkv", "Default (2020) - S01E20 - [AAC 2.0].testtitle.eng.default.ass")]
+        public void should_not_parse_default(string relativePath, string path)
+        {
+            var episodeFile = new EpisodeFile
+            {
+                RelativePath = relativePath
+            };
+
+            var subtitleTitleInfo = Subject.CleanSubtitleTitleInfo(episodeFile, path);
+
+            subtitleTitleInfo.LanguageTags.Should().NotContain("default");
+        }
+    }
+}

src/NzbDrone.Core.Test/ParserTests/LanguageParserFixture.cs

@@ -428,5 +428,38 @@ public void should_add_original_language_and_english_to_german_release_with_ml_t
             result.Languages.Should().Contain(Language.Original);
             result.Languages.Should().Contain(Language.English);
         }
+
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].testtitle.default.eng.forced.ass", new[] { "default", "forced" }, "testtitle", "English")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].eng.default.testtitle.forced.ass", new[] { "default", "forced" }, "testtitle", "English")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].default.eng.testtitle.forced.ass", new[] { "default", "forced" }, "testtitle", "English")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].testtitle.forced.eng.ass", new[] { "forced" }, "testtitle", "English")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].eng.forced.testtitle.ass", new[] { "forced" }, "testtitle", "English")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].forced.eng.testtitle.ass", new[] { "forced" }, "testtitle", "English")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].testtitle.default.fra.forced.ass", new[] { "default", "forced" }, "testtitle", "French")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].fra.default.testtitle.forced.ass", new[] { "default", "forced" }, "testtitle", "French")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].default.fra.testtitle.forced.ass", new[] { "default", "forced" }, "testtitle", "French")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].testtitle.forced.fra.ass", new[] { "forced" }, "testtitle", "French")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].fra.forced.testtitle.ass", new[] { "forced" }, "testtitle", "French")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].forced.fra.testtitle.ass", new[] { "forced" }, "testtitle", "French")]
+        public void should_parse_title_and_tags(string postTitle, string[] expectedTags, string expectedTitle, string expectedLanguage)
+        {
+            var subtitleTitleInfo = LanguageParser.ParseSubtitleLanguageInformation(postTitle);
+
+            subtitleTitleInfo.LanguageTags.Should().BeEquivalentTo(expectedTags);
+            subtitleTitleInfo.Title.Should().BeEquivalentTo(expectedTitle);
+            subtitleTitleInfo.Language.Should().BeEquivalentTo((Language)expectedLanguage);
+        }
+
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].default.forced.ass")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].default.ass")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].ass")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].testtitle.ass")]
+        public void should_not_parse_false_title(string postTitle)
+        {
+            var subtitleTitleInfo = LanguageParser.ParseSubtitleLanguageInformation(postTitle);
+            subtitleTitleInfo.Language.Should().Be(Language.Unknown);
+            subtitleTitleInfo.LanguageTags.Should().BeEmpty();
+            subtitleTitleInfo.RawTitle.Should().BeNull();
+        }
     }
 }

src/NzbDrone.Core/Datastore/Migration/198_parse_titles_from_existing_subtitle_files.cs

@@ -0,0 +1,88 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.IO;
+using System.Linq;
+using Dapper;
+using FluentMigrator;
+using NLog;
+using NzbDrone.Common.Instrumentation;
+using NzbDrone.Core.Datastore.Migration.Framework;
+using NzbDrone.Core.MediaFiles.EpisodeImport.Aggregation.Aggregators;
+using NzbDrone.Core.Parser;
+using NzbDrone.Core.Parser.Model;
+
+namespace NzbDrone.Core.Datastore.Migration
+{
+    [Migration(198)]
+    public class parse_title_from_existing_subtitle_files : NzbDroneMigrationBase
+    {
+        private static readonly Logger Logger = NzbDroneLogger.GetLogger(typeof(AggregateSubtitleInfo));
+
+        protected override void MainDbUpgrade()
+        {
+            Alter.Table("SubtitleFiles").AddColumn("Title").AsString().Nullable();
+            Alter.Table("SubtitleFiles").AddColumn("Copy").AsInt32().WithDefaultValue(0);
+            Execute.WithConnection(UpdateTitles);
+        }
+
+        private void UpdateTitles(IDbConnection conn, IDbTransaction tran)
+        {
+            var updates = new List<object>();
+
+            using (var cmd = conn.CreateCommand())
+            {
+                cmd.Transaction = tran;
+                cmd.CommandText = "SELECT \"SubtitleFiles\".\"Id\", \"SubtitleFiles\".\"RelativePath\", \"EpisodeFiles\".\"RelativePath\", \"EpisodeFiles\".\"OriginalFilePath\" FROM \"SubtitleFiles\" JOIN \"EpisodeFiles\" ON \"SubtitleFiles\".\"EpisodeFileId\" = \"EpisodeFiles\".\"Id\"";
+
+                using var reader = cmd.ExecuteReader();
+                while (reader.Read())
+                {
+                    var id = reader.GetInt32(0);
+                    var relativePath = reader.GetString(1);
+                    var episodeFileRelativePath = reader.GetString(2);
+                    var episodeFileOriginalFilePath = reader.GetString(3);
+
+                    var subtitleTitleInfo = CleanSubtitleTitleInfo(episodeFileRelativePath, episodeFileOriginalFilePath, relativePath);
+
+                    updates.Add(new
+                    {
+                        Id = id,
+                        Title = subtitleTitleInfo.Title,
+                        Language = subtitleTitleInfo.Language,
+                        LanguageTags = subtitleTitleInfo.LanguageTags,
+                        Copy = subtitleTitleInfo.Copy
+                    });
+                }
+            }
+
+            var updateSubtitleFilesSql = "UPDATE \"SubtitleFiles\" SET \"Title\" = @Title, \"Copy\" = @Copy, \"Language\" = @Language, \"LanguageTags\" = @LanguageTags, \"LastUpdated\" = CURRENT_TIMESTAMP WHERE \"Id\" = @Id";
+            conn.Execute(updateSubtitleFilesSql, updates, transaction: tran);
+        }
+
+        private static SubtitleTitleInfo CleanSubtitleTitleInfo(string relativePath, string originalFilePath, string path)
+        {
+            var subtitleTitleInfo = LanguageParser.ParseSubtitleLanguageInformation(path);
+
+            var episodeFileTitle = Path.GetFileNameWithoutExtension(relativePath);
+            var originalEpisodeFileTitle = Path.GetFileNameWithoutExtension(originalFilePath) ?? string.Empty;
+
+            if (subtitleTitleInfo.TitleFirst && (episodeFileTitle.Contains(subtitleTitleInfo.RawTitle, StringComparison.OrdinalIgnoreCase) || originalEpisodeFileTitle.Contains(subtitleTitleInfo.RawTitle, StringComparison.OrdinalIgnoreCase)))
+            {
+                Logger.Debug("Subtitle title '{0}' is in episode file title '{1}'. Removing from subtitle title.", subtitleTitleInfo.RawTitle, episodeFileTitle);
+
+                subtitleTitleInfo = LanguageParser.ParseBasicSubtitle(path);
+            }
+
+            var cleanedTags = subtitleTitleInfo.LanguageTags.Where(t => !episodeFileTitle.Contains(t, StringComparison.OrdinalIgnoreCase)).ToList();
+
+            if (cleanedTags.Count != subtitleTitleInfo.LanguageTags.Count)
+            {
+                Logger.Debug("Removed language tags '{0}' from subtitle title '{1}'.", string.Join(", ", subtitleTitleInfo.LanguageTags.Except(cleanedTags)), subtitleTitleInfo.RawTitle);
+                subtitleTitleInfo.LanguageTags = cleanedTags;
+            }
+
+            return subtitleTitleInfo;
+        }
+    }
+}

src/NzbDrone.Core/Extras/Subtitles/ExistingSubtitleImporter.cs

@@ -5,7 +5,6 @@
 using NzbDrone.Common.Extensions;
 using NzbDrone.Core.Extras.Files;
 using NzbDrone.Core.MediaFiles.EpisodeImport.Aggregation;
-using NzbDrone.Core.Parser;
 using NzbDrone.Core.Parser.Model;
 using NzbDrone.Core.Tv;
 
@@ -71,15 +70,19 @@ public override IEnumerable<ExtraFile> ProcessFiles(Series series, List<string>
                         continue;
                     }
 
+                    var firstEpisode = localEpisode.Episodes.First();
+
                     var subtitleFile = new SubtitleFile
                                        {
                                            SeriesId = series.Id,
                                            SeasonNumber = localEpisode.SeasonNumber,
-                                           EpisodeFileId = localEpisode.Episodes.First().EpisodeFileId,
+                                           EpisodeFileId = firstEpisode.EpisodeFileId,
                                            RelativePath = series.Path.GetRelativePath(possibleSubtitleFile),
-                                           Language = LanguageParser.ParseSubtitleLanguage(possibleSubtitleFile),
-                                           LanguageTags = LanguageParser.ParseLanguageTags(possibleSubtitleFile),
-                                           Extension = extension
+                                           Language = localEpisode.SubtitleInfo.Language,
+                                           LanguageTags = localEpisode.SubtitleInfo.LanguageTags,
+                                           Title = localEpisode.SubtitleInfo.Title,
+                                           Extension = extension,
+                                           Copy = localEpisode.SubtitleInfo.Copy
                                        };
 
                     subtitleFiles.Add(subtitleFile);

src/NzbDrone.Core/Extras/Subtitles/SubtitleFile.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Text;
 using NzbDrone.Core.Extras.Files;
 using NzbDrone.Core.Languages;
 
@@ -13,15 +14,40 @@ public SubtitleFile()
 
         public Language Language { get; set; }
 
-        public string AggregateString => Language + LanguageTagsAsString + Extension;
+        public string AggregateString => Language + Title + LanguageTagsAsString + Extension;
+
+        public int Copy { get; set; }
 
         public List<string> LanguageTags { get; set; }
 
+        public string Title { get; set; }
+
         private string LanguageTagsAsString => string.Join(".", LanguageTags);
 
         public override string ToString()
         {
-            return $"[{Id}] {RelativePath} ({Language}{(LanguageTags.Count > 0 ? "." : "")}{LanguageTagsAsString}{Extension})";
+            var stringBuilder = new StringBuilder();
+            stringBuilder.AppendFormat("[{0}] ", Id);
+            stringBuilder.Append(RelativePath);
+
+            stringBuilder.Append(" (");
+            stringBuilder.Append(Language);
+            if (Title is not null)
+            {
+                stringBuilder.Append('.');
+                stringBuilder.Append(Title);
+            }
+
+            if (LanguageTags.Count > 0)
+            {
+                stringBuilder.Append('.');
+                stringBuilder.Append(LanguageTagsAsString);
+            }
+
+            stringBuilder.Append(Extension);
+            stringBuilder.Append(')');
+
+            return stringBuilder.ToString();
         }
     }
 }

src/NzbDrone.Core/Extras/Subtitles/SubtitleService.cs

@@ -76,16 +76,20 @@ public override IEnumerable<ExtraFile> MoveFilesAfterRename(Series series, List<
 
                 foreach (var group in groupedExtraFilesForEpisodeFile)
                 {
-                    var groupCount = group.Count();
-                    var copy = 1;
+                    var multipleCopies = group.Count() > 1;
+                    var orderedGroup = group.OrderBy(s => -s.Copy).ToList();
+                    var copy = group.First().Copy;
 
-                    foreach (var subtitleFile in group)
+                    foreach (var subtitleFile in orderedGroup)
                     {
-                        var suffix = GetSuffix(subtitleFile.Language, copy, subtitleFile.LanguageTags, groupCount > 1);
+                        if (multipleCopies && subtitleFile.Copy == 0)
+                        {
+                            subtitleFile.Copy = ++copy;
+                        }
+
+                        var suffix = GetSuffix(subtitleFile.Language, subtitleFile.Copy, subtitleFile.LanguageTags, multipleCopies, subtitleFile.Title);
 
                         movedFiles.AddIfNotNull(MoveFile(series, episodeFile, subtitleFile, suffix));
-
-                        copy++;
                     }
                 }
             }
@@ -229,11 +233,22 @@ public override IEnumerable<ExtraFile> ImportFiles(LocalEpisode localEpisode, Ep
             return importedFiles;
         }
 
-        private string GetSuffix(Language language, int copy, List<string> languageTags, bool multipleCopies = false)
+        private string GetSuffix(Language language, int copy, List<string> languageTags, bool multipleCopies = false, string title = null)
         {
             var suffixBuilder = new StringBuilder();
 
-            if (multipleCopies)
+            if (title is not null)
+            {
+                suffixBuilder.Append('.');
+                suffixBuilder.Append(title);
+
+                if (multipleCopies)
+                {
+                    suffixBuilder.Append(" - ");
+                    suffixBuilder.Append(copy);
+                }
+            }
+            else if (multipleCopies)
             {
                 suffixBuilder.Append('.');
                 suffixBuilder.Append(copy);

src/NzbDrone.Core/MediaFiles/EpisodeImport/Aggregation/AggregationService.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using NLog;
 using NzbDrone.Common.Disk;
 using NzbDrone.Core.Configuration;
@@ -30,7 +31,7 @@ public AggregationService(IEnumerable<IAggregateLocalEpisode> augmenters,
                                  IConfigService configService,
                                  Logger logger)
         {
-            _augmenters = augmenters;
+            _augmenters = augmenters.OrderBy(a => a.Order).ToList();
             _diskProvider = diskProvider;
             _videoFileInfoReader = videoFileInfoReader;
             _configService = configService;

src/NzbDrone.Core/MediaFiles/EpisodeImport/Aggregation/Aggregators/AggregateEpisodes.cs

@@ -10,6 +10,8 @@ namespace NzbDrone.Core.MediaFiles.EpisodeImport.Aggregation.Aggregators
 {
     public class AggregateEpisodes : IAggregateLocalEpisode
     {
+        public int Order => 1;
+
         private readonly IParsingService _parsingService;
 
         public AggregateEpisodes(IParsingService parsingService)

src/NzbDrone.Core/MediaFiles/EpisodeImport/Aggregation/Aggregators/AggregateLanguage.cs

@@ -10,6 +10,8 @@ namespace NzbDrone.Core.MediaFiles.EpisodeImport.Aggregation.Aggregators
 {
     public class AggregateLanguage : IAggregateLocalEpisode
     {
+        public int Order => 1;
+
         private readonly List<IAugmentLanguage> _augmentLanguages;
         private readonly Logger _logger;
 

src/NzbDrone.Core/MediaFiles/EpisodeImport/Aggregation/Aggregators/AggregateQuality.cs

@@ -10,6 +10,8 @@ namespace NzbDrone.Core.MediaFiles.EpisodeImport.Aggregation.Aggregators
 {
     public class AggregateQuality : IAggregateLocalEpisode
     {
+        public int Order => 1;
+
         private readonly List<IAugmentQuality> _augmentQualities;
         private readonly Logger _logger;
 

src/NzbDrone.Core/MediaFiles/EpisodeImport/Aggregation/Aggregators/AggregateReleaseGroup.cs

@@ -6,6 +6,8 @@ namespace NzbDrone.Core.MediaFiles.EpisodeImport.Aggregation.Aggregators
 {
     public class AggregateReleaseGroup : IAggregateLocalEpisode
     {
+        public int Order => 1;
+
         public LocalEpisode Aggregate(LocalEpisode localEpisode, DownloadClientItem downloadClientItem)
         {
             // Prefer ReleaseGroup from DownloadClient/Folder if they're not a season pack

src/NzbDrone.Core/MediaFiles/EpisodeImport/Aggregation/Aggregators/AggregateReleaseInfo.cs

@@ -8,6 +8,8 @@ namespace NzbDrone.Core.MediaFiles.EpisodeImport.Aggregation.Aggregators
 {
     public class AggregateReleaseInfo : IAggregateLocalEpisode
     {
+        public int Order => 1;
+
         private readonly IHistoryService _historyService;
 
         public AggregateReleaseInfo(IHistoryService historyService)

src/NzbDrone.Core/MediaFiles/EpisodeImport/Aggregation/Aggregators/AggregateSubtitleInfo.cs

@@ -0,0 +1,65 @@
+using System;
+using System.IO;
+using System.Linq;
+using NLog;
+using NzbDrone.Core.Download;
+using NzbDrone.Core.Extras.Subtitles;
+using NzbDrone.Core.Parser;
+using NzbDrone.Core.Parser.Model;
+
+namespace NzbDrone.Core.MediaFiles.EpisodeImport.Aggregation.Aggregators
+{
+    public class AggregateSubtitleInfo : IAggregateLocalEpisode
+    {
+        public int Order => 2;
+
+        private readonly Logger _logger;
+
+        public AggregateSubtitleInfo(Logger logger)
+        {
+            _logger = logger;
+        }
+
+        public LocalEpisode Aggregate(LocalEpisode localEpisode, DownloadClientItem downloadClientItem)
+        {
+            var path = localEpisode.Path;
+            var isSubtitleFile = SubtitleFileExtensions.Extensions.Contains(Path.GetExtension(path));
+
+            if (!isSubtitleFile)
+            {
+                return localEpisode;
+            }
+
+            var firstEpisode = localEpisode.Episodes.First();
+            var episodeFile = firstEpisode.EpisodeFile.Value;
+            localEpisode.SubtitleInfo = CleanSubtitleTitleInfo(episodeFile, path);
+
+            return localEpisode;
+        }
+
+        public SubtitleTitleInfo CleanSubtitleTitleInfo(EpisodeFile episodeFile, string path)
+        {
+            var subtitleTitleInfo = LanguageParser.ParseSubtitleLanguageInformation(path);
+
+            var episodeFileTitle = Path.GetFileNameWithoutExtension(episodeFile.RelativePath);
+            var originalEpisodeFileTitle = Path.GetFileNameWithoutExtension(episodeFile.OriginalFilePath) ?? string.Empty;
+
+            if (subtitleTitleInfo.TitleFirst && (episodeFileTitle.Contains(subtitleTitleInfo.RawTitle, StringComparison.OrdinalIgnoreCase) || originalEpisodeFileTitle.Contains(subtitleTitleInfo.RawTitle, StringComparison.OrdinalIgnoreCase)))
+            {
+                _logger.Debug("Subtitle title '{0}' is in episode file title '{1}'. Removing from subtitle title.", subtitleTitleInfo.RawTitle, episodeFileTitle);
+
+                subtitleTitleInfo = LanguageParser.ParseBasicSubtitle(path);
+            }
+
+            var cleanedTags = subtitleTitleInfo.LanguageTags.Where(t => !episodeFileTitle.Contains(t, StringComparison.OrdinalIgnoreCase)).ToList();
+
+            if (cleanedTags.Count != subtitleTitleInfo.LanguageTags.Count)
+            {
+                _logger.Debug("Removed language tags '{0}' from subtitle title '{1}'.", string.Join(", ", subtitleTitleInfo.LanguageTags.Except(cleanedTags)), subtitleTitleInfo.RawTitle);
+                subtitleTitleInfo.LanguageTags = cleanedTags;
+            }
+
+            return subtitleTitleInfo;
+        }
+    }
+}

src/NzbDrone.Core/MediaFiles/EpisodeImport/Aggregation/Aggregators/IAggregateLocalEpisode.cs

@@ -5,6 +5,7 @@ namespace NzbDrone.Core.MediaFiles.EpisodeImport.Aggregation.Aggregators
 {
     public interface IAggregateLocalEpisode
     {
+        int Order { get; }
         LocalEpisode Aggregate(LocalEpisode localEpisode, DownloadClientItem downloadClientItem);
     }
 }

src/NzbDrone.Core/Parser/LanguageParser.cs

@@ -7,6 +7,7 @@
 using NzbDrone.Common.Extensions;
 using NzbDrone.Common.Instrumentation;
 using NzbDrone.Core.Languages;
+using NzbDrone.Core.Parser.Model;
 
 namespace NzbDrone.Core.Parser
 {
@@ -28,7 +29,11 @@ public static class LanguageParser
         private static readonly Regex GermanDualLanguageRegex = new (@"(?<!WEB[-_. ]?)\bDL\b", RegexOptions.Compiled | RegexOptions.IgnoreCase);
         private static readonly Regex GermanMultiLanguageRegex = new (@"\bML\b", RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
-        private static readonly Regex SubtitleLanguageRegex = new Regex(".+?[-_. ](?<iso_code>[a-z]{2,3})([-_. ](?<tags>full|forced|foreign|default|cc|psdh|sdh))*$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
+        private static readonly Regex SubtitleLanguageRegex = new Regex(".+?([-_. ](?<tags>full|forced|foreign|default|cc|psdh|sdh))*[-_. ](?<iso_code>[a-z]{2,3})([-_. ](?<tags>full|forced|foreign|default|cc|psdh|sdh))*$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
+
+        private static readonly Regex SubtitleLanguageTitleRegex = new Regex(".+?(\\.((?<tags1>full|forced|foreign|default|cc|psdh|sdh)|(?<iso_code>[a-z]{2,3})))*\\.(?<title>[^.]*)(\\.((?<tags2>full|forced|foreign|default|cc|psdh|sdh)|(?<iso_code>[a-z]{2,3})))*$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
+
+        private static readonly Regex SubtitleTitleRegex = new Regex("((?<title>.+) - )?(?<copy>\\d+)$", RegexOptions.Compiled);
 
         public static List<Language> ParseLanguages(string title)
         {
@@ -249,6 +254,72 @@ public static Language ParseSubtitleLanguage(string fileName)
             return Language.Unknown;
         }
 
+        public static SubtitleTitleInfo ParseBasicSubtitle(string fileName)
+        {
+            return new SubtitleTitleInfo
+            {
+                TitleFirst = false,
+                LanguageTags = ParseLanguageTags(fileName),
+                Language = ParseSubtitleLanguage(fileName)
+            };
+        }
+
+        public static SubtitleTitleInfo ParseSubtitleLanguageInformation(string fileName)
+        {
+            var simpleFilename = Path.GetFileNameWithoutExtension(fileName);
+            var matchTitle = SubtitleLanguageTitleRegex.Match(simpleFilename);
+
+            if (!matchTitle.Groups["title"].Success || (matchTitle.Groups["iso_code"].Captures.Count is var languageCodeNumber && languageCodeNumber != 1))
+            {
+                Logger.Debug("Could not parse a title from subtitle file: {0}. Falling back to parsing without title.", fileName);
+
+                return ParseBasicSubtitle(fileName);
+            }
+
+            var isoCode = matchTitle.Groups["iso_code"].Value;
+            var isoLanguage = IsoLanguages.Find(isoCode.ToLower());
+
+            var language = isoLanguage?.Language ?? Language.Unknown;
+
+            var languageTags = matchTitle.Groups["tags1"].Captures
+                .Union(matchTitle.Groups["tags2"].Captures)
+                .Cast<Capture>()
+                .Where(tag => !tag.Value.Empty())
+                .Select(tag => tag.Value.ToLower());
+            var rawTitle = matchTitle.Groups["title"].Value;
+
+            var subtitleTitleInfo = new SubtitleTitleInfo
+            {
+                TitleFirst = matchTitle.Groups["tags1"].Captures.Empty(),
+                LanguageTags = languageTags.ToList(),
+                RawTitle = rawTitle,
+                Language = language
+            };
+
+            UpdateTitleAndCopyFromTitle(subtitleTitleInfo);
+
+            return subtitleTitleInfo;
+        }
+
+        public static void UpdateTitleAndCopyFromTitle(SubtitleTitleInfo subtitleTitleInfo)
+        {
+            if (subtitleTitleInfo.RawTitle is null)
+            {
+                subtitleTitleInfo.Title = null;
+                subtitleTitleInfo.Copy = 0;
+            }
+            else if (SubtitleTitleRegex.Match(subtitleTitleInfo.RawTitle) is var match && match.Success)
+            {
+                subtitleTitleInfo.Title = match.Groups["title"].Success ? match.Groups["title"].ToString() : null;
+                subtitleTitleInfo.Copy = int.Parse(match.Groups["copy"].ToString());
+            }
+            else
+            {
+                subtitleTitleInfo.Title = subtitleTitleInfo.RawTitle;
+                subtitleTitleInfo.Copy = 0;
+            }
+        }
+
         public static List<string> ParseLanguageTags(string fileName)
         {
             try

src/NzbDrone.Core/Parser/Model/LocalEpisode.cs

@@ -44,6 +44,7 @@ public LocalEpisode()
         public bool FileRenamedAfterScriptImport { get; set; }
         public bool ShouldImportExtras { get; set; }
         public List<string> PossibleExtraFiles { get; set; }
+        public SubtitleTitleInfo SubtitleInfo { get; set; }
 
         public int SeasonNumber
         {

src/NzbDrone.Core/Parser/Model/SubtitleTitleInfo.cs

@@ -0,0 +1,15 @@
+using System.Collections.Generic;
+using NzbDrone.Core.Languages;
+
+namespace NzbDrone.Core.Parser.Model
+{
+    public class SubtitleTitleInfo
+    {
+        public List<string> LanguageTags { get; set; }
+        public Language Language { get; set; }
+        public string RawTitle { get; set; }
+        public string Title { get; set; }
+        public int Copy { get; set; }
+        public bool TitleFirst { get; set; }
+    }
+}