diff --git a/Kyoo.Common/Controllers/IIdentifier.cs b/Kyoo.Common/Controllers/IIdentifier.cs
index 11aeb65d..5d11c53b 100644
--- a/Kyoo.Common/Controllers/IIdentifier.cs
+++ b/Kyoo.Common/Controllers/IIdentifier.cs
@@ -12,32 +12,26 @@ namespace Kyoo.Controllers
 		/// <summary>
 		/// Identify a path and return the parsed metadata.
 		/// </summary>
-		/// <param name="path">
-		/// The path of the episode file to parse.
-		/// </param>
-		/// <param name="relativePath">
-		/// The path of the episode file relative to the library root. It starts with a <c>/</c>.
-		/// </param>
-		/// <exception cref="IdentificationFailedException">The identifier could not work for the given path.</exception>
+		/// <param name="path">The path of the episode file to parse.</param>
+		/// <exception cref="IdentificationFailedException">
+		/// The identifier could not work for the given path.
+		/// </exception>
 		/// <returns>
 		/// A tuple of models representing parsed metadata.
 		/// If no metadata could be parsed for a type, null can be returned.
 		/// </returns>
-		Task<(Collection, Show, Season, Episode)> Identify(string path, string relativePath);
+		Task<(Collection, Show, Season, Episode)> Identify(string path);
 		
 		/// <summary>
 		/// Identify an external subtitle or track file from it's path and return the parsed metadata.
 		/// </summary>
-		/// <param name="path">
-		/// The path of the external track file to parse.
-		/// </param>
-		/// <param name="relativePath">
-		/// The path of the episode file relative to the library root. It starts with a <c>/</c>.
-		/// </param>
-		/// <exception cref="IdentificationFailedException">The identifier could not work for the given path.</exception>
+		/// <param name="path">The path of the external track file to parse.</param>
+		/// <exception cref="IdentificationFailedException">
+		/// The identifier could not work for the given path.
+		/// </exception>
 		/// <returns>
 		/// The metadata of the track identified.
 		/// </returns>
-		Task<Track> IdentifyTrack(string path, string relativePath);
+		Task<Track> IdentifyTrack(string path);
 	}
 }
\ No newline at end of file
diff --git a/Kyoo.Common/Controllers/ITask.cs b/Kyoo.Common/Controllers/ITask.cs
index e5fbce29..e8d07000 100644
--- a/Kyoo.Common/Controllers/ITask.cs
+++ b/Kyoo.Common/Controllers/ITask.cs
@@ -4,6 +4,7 @@ using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 using JetBrains.Annotations;
+using Kyoo.Models;
 using Kyoo.Models.Attributes;
 using Kyoo.Models.Exceptions;
 
@@ -116,6 +117,15 @@ namespace Kyoo.Controllers
 		{
 			if (typeof(T) == typeof(object))
 				return (T)Value;
+
+			if (Value is IResource resource)
+			{
+				if (typeof(T) == typeof(string))
+					return (T)(object)resource.Slug;
+				if (typeof(T) == typeof(int))
+					return (T)(object)resource.ID;
+			}
+
 			return (T)Convert.ChangeType(Value, typeof(T));
 		}
 	}
diff --git a/Kyoo.Tests/Database/RepositoryTests.cs b/Kyoo.Tests/Database/RepositoryTests.cs
index 51db3061..4cc72b4c 100644
--- a/Kyoo.Tests/Database/RepositoryTests.cs
+++ b/Kyoo.Tests/Database/RepositoryTests.cs
@@ -25,6 +25,7 @@ namespace Kyoo.Tests
 		public void Dispose()
 		{
 			Repositories.Dispose();
+			GC.SuppressFinalize(this);
 		}
 
 		public ValueTask DisposeAsync()
diff --git a/Kyoo.Tests/Identifier/IdentifierTests.cs b/Kyoo.Tests/Identifier/IdentifierTests.cs
new file mode 100644
index 00000000..170a1352
--- /dev/null
+++ b/Kyoo.Tests/Identifier/IdentifierTests.cs
@@ -0,0 +1,135 @@
+using System.Threading.Tasks;
+using Kyoo.Controllers;
+using Kyoo.Models;
+using Kyoo.Models.Options;
+using Microsoft.Extensions.Options;
+using Moq;
+using Xunit;
+
+namespace Kyoo.Tests.Identifier
+{
+	public class Identifier
+	{
+		private readonly Mock<ILibraryManager> _manager;
+		private readonly IIdentifier _identifier;
+		
+		public Identifier()
+		{
+			Mock<IOptionsMonitor<MediaOptions>> options = new();
+			options.Setup(x => x.CurrentValue).Returns(new MediaOptions
+			{
+				Regex = new []
+				{
+					"^\\/?(?<Collection>.+)?\\/(?<Show>.+?)(?: \\((?<StartYear>\\d+)\\))?\\/\\k<Show>(?: \\(\\d+\\))? S(?<Season>\\d+)E(?<Episode>\\d+)\\..*$",
+					"^\\/?(?<Collection>.+)?\\/(?<Show>.+?)(?: \\((?<StartYear>\\d+)\\))?\\/\\k<Show>(?: \\(\\d+\\))? (?<Absolute>\\d+)\\..*$",
+					"^\\/?(?<Collection>.+)?\\/(?<Show>.+?)(?: \\((?<StartYear>\\d+)\\))?\\/\\k<Show>(?: \\(\\d+\\))?\\..*$"
+				}
+			});
+			
+			_manager = new Mock<ILibraryManager>();
+			_identifier = new RegexIdentifier(options.Object, _manager.Object);
+		}
+		
+		
+		[Fact]
+		public async Task EpisodeIdentification()
+		{
+			_manager.Setup(x => x.GetAll(null, new Sort<Library>(), default)).ReturnsAsync(new[]
+			{
+				new Library {Paths = new [] {"/kyoo/Library/"}}
+			});
+			(Collection collection, Show show, Season season, Episode episode) = await _identifier.Identify(
+				"/kyoo/Library/Collection/Show (2000)/Show S01E01.extension");
+			Assert.Equal("Collection", collection.Name);
+			Assert.Equal("collection", collection.Slug);
+			Assert.Equal("Show", show.Title);
+			Assert.Equal("show", show.Slug);
+			Assert.Equal(2000, show.StartAir!.Value.Year);
+			Assert.Equal(1, season.SeasonNumber);
+			Assert.Equal(1, episode.SeasonNumber);
+			Assert.Equal(1, episode.EpisodeNumber);
+			Assert.Null(episode.AbsoluteNumber);
+		}
+		
+		[Fact]
+		public async Task EpisodeIdentificationWithoutLibraryTrailingSlash()
+		{
+			_manager.Setup(x => x.GetAll(null, new Sort<Library>(), default)).ReturnsAsync(new[]
+			{
+				new Library {Paths = new [] {"/kyoo/Library"}}
+			});
+			(Collection collection, Show show, Season season, Episode episode) = await _identifier.Identify(
+				"/kyoo/Library/Collection/Show (2000)/Show S01E01.extension");
+			Assert.Equal("Collection", collection.Name);
+			Assert.Equal("collection", collection.Slug);
+			Assert.Equal("Show", show.Title);
+			Assert.Equal("show", show.Slug);
+			Assert.Equal(2000, show.StartAir!.Value.Year);
+			Assert.Equal(1, season.SeasonNumber);
+			Assert.Equal(1, episode.SeasonNumber);
+			Assert.Equal(1, episode.EpisodeNumber);
+			Assert.Null(episode.AbsoluteNumber);
+		}
+		
+		[Fact]
+		public async Task EpisodeIdentificationMultiplePaths()
+		{
+			_manager.Setup(x => x.GetAll(null, new Sort<Library>(), default)).ReturnsAsync(new[]
+			{
+				new Library {Paths = new [] {"/kyoo", "/kyoo/Library/"}}
+			});
+			(Collection collection, Show show, Season season, Episode episode) = await _identifier.Identify(
+				"/kyoo/Library/Collection/Show (2000)/Show S01E01.extension");
+			Assert.Equal("Collection", collection.Name);
+			Assert.Equal("collection", collection.Slug);
+			Assert.Equal("Show", show.Title);
+			Assert.Equal("show", show.Slug);
+			Assert.Equal(2000, show.StartAir!.Value.Year);
+			Assert.Equal(1, season.SeasonNumber);
+			Assert.Equal(1, episode.SeasonNumber);
+			Assert.Equal(1, episode.EpisodeNumber);
+			Assert.Null(episode.AbsoluteNumber);
+		}
+		
+		[Fact]
+		public async Task AbsoluteEpisodeIdentification()
+		{
+			_manager.Setup(x => x.GetAll(null, new Sort<Library>(), default)).ReturnsAsync(new[]
+			{
+				new Library {Paths = new [] {"/kyoo", "/kyoo/Library/"}}
+			});
+			(Collection collection, Show show, Season season, Episode episode) = await _identifier.Identify(
+				"/kyoo/Library/Collection/Show (2000)/Show 100.extension");
+			Assert.Equal("Collection", collection.Name);
+			Assert.Equal("collection", collection.Slug);
+			Assert.Equal("Show", show.Title);
+			Assert.Equal("show", show.Slug);
+			Assert.Equal(2000, show.StartAir!.Value.Year);
+			Assert.Null(season);
+			Assert.Null(episode.SeasonNumber);
+			Assert.Null(episode.EpisodeNumber);
+			Assert.Equal(100, episode.AbsoluteNumber);
+		}
+		
+		[Fact]
+		public async Task MovieEpisodeIdentification()
+		{
+			_manager.Setup(x => x.GetAll(null, new Sort<Library>(), default)).ReturnsAsync(new[]
+			{
+				new Library {Paths = new [] {"/kyoo", "/kyoo/Library/"}}
+			});
+			(Collection collection, Show show, Season season, Episode episode) = await _identifier.Identify(
+				"/kyoo/Library/Collection/Show (2000)/Show.extension");
+			Assert.Equal("Collection", collection.Name);
+			Assert.Equal("collection", collection.Slug);
+			Assert.Equal("Show", show.Title);
+			Assert.Equal("show", show.Slug);
+			Assert.Equal(2000, show.StartAir!.Value.Year);
+			Assert.Null(season);
+			Assert.True(show.IsMovie);
+			Assert.Null(episode.SeasonNumber);
+			Assert.Null(episode.EpisodeNumber);
+			Assert.Null(episode.AbsoluteNumber);
+		}
+	}
+}
\ No newline at end of file
diff --git a/Kyoo.Tests/Kyoo.Tests.csproj b/Kyoo.Tests/Kyoo.Tests.csproj
index d198dae6..9dce41fc 100644
--- a/Kyoo.Tests/Kyoo.Tests.csproj
+++ b/Kyoo.Tests/Kyoo.Tests.csproj
@@ -17,6 +17,7 @@
 		<PackageReference Include="Divergic.Logging.Xunit" Version="3.6.0" />
 		<PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="5.0.0" />
 		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.10.0" />
+		<PackageReference Include="Moq" Version="4.16.1" />
 		<PackageReference Include="xunit" Version="2.4.1" />
 		<PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
 			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/Kyoo/Controllers/RegexIdentifier.cs b/Kyoo/Controllers/RegexIdentifier.cs
index 3c09ae4a..c1a8ab45 100644
--- a/Kyoo/Controllers/RegexIdentifier.cs
+++ b/Kyoo/Controllers/RegexIdentifier.cs
@@ -1,5 +1,6 @@
 using System;
 using System.IO;
+using System.Linq;
 using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 using Kyoo.Models;
@@ -18,24 +19,48 @@ namespace Kyoo.Controllers
 		/// <summary>
 		/// The configuration of kyoo to retrieve the identifier regex.
 		/// </summary>
-		private readonly IOptions<MediaOptions> _configuration;
+		private readonly IOptionsMonitor<MediaOptions> _configuration;
+		/// <summary>
+		/// The library manager used to retrieve libraries paths.
+		/// </summary>
+		private readonly ILibraryManager _libraryManager;
 
 		/// <summary>
 		/// Create a new <see cref="RegexIdentifier"/>.
 		/// </summary>
 		/// <param name="configuration">The regex patterns to use.</param>
-		public RegexIdentifier(IOptions<MediaOptions> configuration)
+		/// <param name="libraryManager">The library manager used to retrieve libraries paths.</param>
+		public RegexIdentifier(IOptionsMonitor<MediaOptions> configuration, ILibraryManager libraryManager)
 		{
 			_configuration = configuration;
+			_libraryManager = libraryManager;
+		}
+
+		/// <summary>
+		/// Retrieve the relative path of an episode or subtitle.
+		/// </summary>
+		/// <param name="path">The full path of the episode</param>
+		/// <returns>The path relative to the library root.</returns>
+		private async Task<string> _GetRelativePath(string path)
+		{
+			string libraryPath = (await _libraryManager.GetAll<Library>())
+				.SelectMany(x => x.Paths)
+				.Where(path.StartsWith)
+				.OrderByDescending(x => x.Length)
+				.FirstOrDefault();
+			return path[(libraryPath?.Length ?? 0)..];
 		}
 		
 		/// <inheritdoc />
-		public Task<(Collection, Show, Season, Episode)> Identify(string path, string relativePath)
+		public async Task<(Collection, Show, Season, Episode)> Identify(string path)
 		{
-			Regex regex = new(_configuration.Value.Regex, RegexOptions.IgnoreCase | RegexOptions.Compiled);
-			Match match = regex.Match(relativePath);
+			string relativePath = await _GetRelativePath(path);
+			Match match = _configuration.CurrentValue.Regex
+				.Select(x => new Regex(x, RegexOptions.IgnoreCase | RegexOptions.Compiled))
+				.Select(x => x.Match(relativePath))
+				.FirstOrDefault(x => x.Success);
 
-			if (!match.Success)
+			if (match == null)
 				throw new IdentificationFailedException($"The episode at {path} does not match the episode's regex.");
 
 			(Collection collection, Show show, Season season, Episode episode) ret = (
@@ -80,24 +105,27 @@ namespace Kyoo.Controllers
 				ret.episode.Title = ret.show.Title;
 			}
 
-			return Task.FromResult(ret);
+			return ret;
 		}
 
 		/// <inheritdoc />
-		public Task<Track> IdentifyTrack(string path, string relativePath)
+		public async Task<Track> IdentifyTrack(string path)
 		{
-			Regex regex = new(_configuration.Value.SubtitleRegex, RegexOptions.IgnoreCase | RegexOptions.Compiled);
-			Match match = regex.Match(path);
+			string relativePath = await _GetRelativePath(path);
+			Match match = _configuration.CurrentValue.SubtitleRegex
+				.Select(x => new Regex(x, RegexOptions.IgnoreCase | RegexOptions.Compiled))
+				.Select(x => x.Match(relativePath))
+				.FirstOrDefault(x => x.Success);
 
-			if (!match.Success)
+			if (match == null)
 				throw new IdentificationFailedException($"The subtitle at {path} does not match the subtitle's regex.");
 
 			string episodePath = match.Groups["Episode"].Value;
-			return Task.FromResult(new Track
+			return new Track
 			{
 				Type = StreamType.Subtitle,
 				Language = match.Groups["Language"].Value,
-				IsDefault = match.Groups["Default"].Value.Length > 0, 
+				IsDefault = match.Groups["Default"].Value.Length > 0,
 				IsForced = match.Groups["Forced"].Value.Length > 0,
 				Codec = FileExtensions.SubtitleExtensions[Path.GetExtension(path)],
 				IsExternal = true,
@@ -106,7 +134,7 @@ namespace Kyoo.Controllers
 				{
 					Path = episodePath
 				}
-			});
+			};
 		}
 	}
 }
\ No newline at end of file
diff --git a/Kyoo/Models/Options/MediaOptions.cs b/Kyoo/Models/Options/MediaOptions.cs
index d53b13d0..4b02e4db 100644
--- a/Kyoo/Models/Options/MediaOptions.cs
+++ b/Kyoo/Models/Options/MediaOptions.cs
@@ -13,11 +13,11 @@ namespace Kyoo.Models.Options
 		/// <summary>
 		/// A regex for episodes
 		/// </summary>
-		public string Regex { get; set; }
+		public string[] Regex { get; set; }
 		
 		/// <summary>
 		/// A regex for subtitles
 		/// </summary>
-		public string SubtitleRegex { get; set; }
+		public string[] SubtitleRegex { get; set; }
 	}
 }
\ No newline at end of file
diff --git a/Kyoo/Tasks/RegisterEpisode.cs b/Kyoo/Tasks/RegisterEpisode.cs
index dea3bf40..5541e6fa 100644
--- a/Kyoo/Tasks/RegisterEpisode.cs
+++ b/Kyoo/Tasks/RegisterEpisode.cs
@@ -73,8 +73,6 @@ namespace Kyoo.Tasks
 			return new()
 			{
 				TaskParameter.CreateRequired<string>("path", "The path of the episode file"),
-				TaskParameter.CreateRequired<string>("relativePath",
-					"The path of the episode file relative to the library root. It starts with a /."),
 				TaskParameter.CreateRequired<Library>("library", "The library in witch the episode is")
 			};
 		}
@@ -83,17 +81,19 @@ namespace Kyoo.Tasks
 		public async Task Run(TaskParameters arguments, IProgress<float> progress, CancellationToken cancellationToken)
 		{
 			string path = arguments["path"].As<string>();
-			string relativePath = arguments["relativePath"].As<string>();
 			Library library = arguments["library"].As<Library>();
 			progress.Report(0);
-			
-			if (library.Providers == null)
-				await _libraryManager.Load(library, x => x.Providers);
-			_metadataProvider.UseProviders(library.Providers);
+
+			if (library != null)
+			{
+				if (library.Providers == null)
+					await _libraryManager.Load(library, x => x.Providers);
+				_metadataProvider.UseProviders(library.Providers);
+			}
+
 			try
 			{
-				(Collection collection, Show show, Season season, Episode episode) = await _identifier.Identify(path,
-					relativePath);
+				(Collection collection, Show show, Season season, Episode episode) = await _identifier.Identify(path);
 				progress.Report(15);
 
 				collection = await _RegisterAndFill(collection);
diff --git a/Kyoo/Tasks/RegisterSubtitle.cs b/Kyoo/Tasks/RegisterSubtitle.cs
index 23a7d425..6c36ea58 100644
--- a/Kyoo/Tasks/RegisterSubtitle.cs
+++ b/Kyoo/Tasks/RegisterSubtitle.cs
@@ -39,9 +39,7 @@ namespace Kyoo.Tasks
 		{
 			return new()
 			{
-				TaskParameter.CreateRequired<string>("path", "The path of the subtitle file"),
-				TaskParameter.CreateRequired<string>("relativePath",
-					"The path of the subtitle file relative to the library root. It starts with a /.")
+				TaskParameter.CreateRequired<string>("path", "The path of the subtitle file")
 			};
 		}
 		
@@ -49,12 +47,11 @@ namespace Kyoo.Tasks
 		public async Task Run(TaskParameters arguments, IProgress<float> progress, CancellationToken cancellationToken)
 		{
 			string path = arguments["path"].As<string>();
-			string relativePath = arguments["relativePath"].As<string>();
 
 			try
 			{
 				progress.Report(0);
-				Track track = await _identifier.IdentifyTrack(path, relativePath);
+				Track track = await _identifier.IdentifyTrack(path);
 				progress.Report(25);
 
 				if (track.Episode == null)
diff --git a/Kyoo/settings.json b/Kyoo/settings.json
index ffc9b446..66ff8566 100644
--- a/Kyoo/settings.json
+++ b/Kyoo/settings.json
@@ -44,8 +44,14 @@
   },
   
   "media": {
-    "regex": "(?:\\/(?<Collection>.*?))?\\/(?<Show>.*?)(?: \\(?<StartYear>\\d+\\))?\\/\\k<Show>(?: \\(\\d+\\))?(?:(?: S(?<Season>\\d+)E(?<Episode>\\d+))| (?<Absolute>\\d+))?.*$",
-    "subtitleRegex": "^(?<Episode>.*)\\.(?<Language>\\w{1,3})\\.(?<Default>default\\.)?(?<Forced>forced\\.)?.*$"
+    "regex": [
+      "^\\/?(?<Collection>.+)?\\/(?<Show>.+?)(?: \\((?<StartYear>\\d+)\\))?\\/\\k<Show>(?: \\(\\d+\\))? S(?<Season>\\d+)E(?<Episode>\\d+)\\..*$",
+      "^\\/?(?<Collection>.+)?\\/(?<Show>.+?)(?: \\((?<StartYear>\\d+)\\))?\\/\\k<Show>(?: \\(\\d+\\))? (?<Absolute>\\d+)\\..*$",
+      "^\\/?(?<Collection>.+)?\\/(?<Show>.+?)(?: \\((?<StartYear>\\d+)\\))?\\/\\k<Show>(?: \\(\\d+\\))?\\..*$"
+    ],
+    "subtitleRegex": [
+      "^(?<Episode>.+)\\.(?<Language>\\w{1,3})\\.(?<Default>default\\.)?(?<Forced>forced\\.)?.*$"
+    ]
   },
   
   "authentication": {