Resolve name from episode folder

Emby.Server.Implementations/Library/LibraryManager.cs

@@ -27,6 +27,7 @@ using MediaBrowser.Controller.Drawing;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.Audio;
+using MediaBrowser.Controller.Entities.TV;
 using MediaBrowser.Controller.IO;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.LiveTv;
@@ -48,6 +49,7 @@ using MediaBrowser.Providers.MediaInfo;
 using Microsoft.Extensions.Caching.Memory;
 using Microsoft.Extensions.Logging;
 using Episode = MediaBrowser.Controller.Entities.TV.Episode;
+using EpisodeInfo = Emby.Naming.TV.EpisodeInfo;
 using Genre = MediaBrowser.Controller.Entities.Genre;
 using Person = MediaBrowser.Controller.Entities.Person;
 using VideoResolver = Emby.Naming.Video.VideoResolver;
@@ -2512,7 +2514,7 @@ namespace Emby.Server.Implementations.Library
         public bool FillMissingEpisodeNumbersFromPath(Episode episode, bool forceRefresh)
         {
             var series = episode.Series;
-            bool? isAbsoluteNaming = series == null ? false : string.Equals(series.DisplayOrder, "absolute", StringComparison.OrdinalIgnoreCase);
+            bool? isAbsoluteNaming = series != null && string.Equals(series.DisplayOrder, "absolute", StringComparison.OrdinalIgnoreCase);
             if (!isAbsoluteNaming.Value)
             {
                 // In other words, no filter applied
@@ -2524,9 +2526,32 @@ namespace Emby.Server.Implementations.Library
             var isFolder = episode.VideoType == VideoType.BluRay || episode.VideoType == VideoType.Dvd;
 
             // TODO nullable - what are we trying to do there with empty episodeInfo?
-            var episodeInfo = episode.IsFileProtocol
-                ? resolver.Resolve(episode.Path, isFolder, null, null, isAbsoluteNaming) ?? new Naming.TV.EpisodeInfo(episode.Path)
-                : new Naming.TV.EpisodeInfo(episode.Path);
+            EpisodeInfo episodeInfo = null;
+            if (episode.IsFileProtocol)
+            {
+                episodeInfo = resolver.Resolve(episode.Path, isFolder, null, null, isAbsoluteNaming) ?? new EpisodeInfo(episode.Path);
+                // Resolve from parent folder if it's not the Season folder
+                if (!episodeInfo.EpisodeNumber.HasValue && episode.Parent is not Season)
+                {
+                    var episodeInfoFromFolder = resolver.Resolve(Path.GetDirectoryName(episode.Path)!, true, null, null, isAbsoluteNaming);
+                    // merge the missing information
+                    episodeInfo.SeriesName = episodeInfoFromFolder?.SeriesName;
+                    episodeInfo.EpisodeNumber ??= episodeInfoFromFolder?.EpisodeNumber;
+                    episodeInfo.EndingEpisodeNumber ??= episodeInfoFromFolder?.EndingEpisodeNumber;
+                    episodeInfo.SeasonNumber ??= episodeInfoFromFolder?.SeasonNumber;
+                    episodeInfo.Container ??= episodeInfoFromFolder?.Container;
+                    episodeInfo.Format3D ??= episodeInfoFromFolder?.Format3D;
+                    episodeInfo.Is3D = episodeInfoFromFolder?.Is3D ?? episodeInfo.Is3D;
+                    episodeInfo.IsStub = episodeInfoFromFolder?.IsStub ?? episodeInfo.IsStub;
+                    episodeInfo.StubType = episodeInfoFromFolder?.StubType;
+                    episodeInfo.IsByDate = episodeInfoFromFolder?.IsStub ?? episodeInfo.IsByDate;
+                    episodeInfo.Day ??= episodeInfoFromFolder?.Day;
+                    episodeInfo.Month ??= episodeInfoFromFolder?.Month;
+                    episodeInfo.Year ??= episodeInfoFromFolder?.Year;
+                }
+            }
+
+            episodeInfo ??= new EpisodeInfo(episode.Path);
 
             try
             {