don't use omdb for missing episodes

MediaBrowser.Controller/Entities/TV/Episode.cs

@@ -287,7 +287,9 @@ namespace MediaBrowser.Controller.Entities.TV
                 id.AnimeSeriesIndex = series.AnimeSeriesIndex;
             }
 
+            id.IsMissingEpisode = IsMissingEpisode;
             id.IndexNumberEnd = IndexNumberEnd;
+            id.IsVirtualUnaired = IsVirtualUnaired;
 
             return id;
         }

MediaBrowser.Controller/Providers/EpisodeInfo.cs

@@ -10,6 +10,9 @@ namespace MediaBrowser.Controller.Providers
         public int? IndexNumberEnd { get; set; }
         public int? AnimeSeriesIndex { get; set; }
 
+        public bool IsMissingEpisode { get; set; }
+        public bool IsVirtualUnaired { get; set; }
+
         public EpisodeInfo()
         {
             SeriesProviderIds = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);

MediaBrowser.Providers/Manager/MetadataService.cs

@@ -310,6 +310,11 @@ namespace MediaBrowser.Providers.Manager
                 return true;
             }
 
+            if (!(item is Audio) && !(item is Video))
+            {
+                return true;
+            }
+
             return false;
         }
 

MediaBrowser.Providers/TV/Omdb/OmdbEpisodeProvider.cs

@@ -20,7 +20,7 @@ namespace MediaBrowser.Providers.TV
     {
         private readonly IJsonSerializer _jsonSerializer;
         private readonly IHttpClient _httpClient;
-        private OmdbItemProvider _itemProvider;
+        private readonly OmdbItemProvider _itemProvider;
 
         public OmdbEpisodeProvider(IJsonSerializer jsonSerializer, IHttpClient httpClient, ILogger logger, ILibraryManager libraryManager)
         {
@@ -41,6 +41,12 @@ namespace MediaBrowser.Providers.TV
                 Item = new Episode()
             };
 
+            // Allowing this will dramatically increase scan times
+            if (info.IsMissingEpisode || info.IsVirtualUnaired)
+            {
+                return result;
+            }
+
             var imdbId = info.GetProviderId(MetadataProviders.Imdb);
             if (string.IsNullOrWhiteSpace(imdbId))
             {

MediaBrowser.Providers/TV/TheMovieDb/MovieDbEpisodeProvider.cs

@@ -64,6 +64,12 @@ namespace MediaBrowser.Providers.TV
         {
             var result = new MetadataResult<Episode>();
 
+            // Allowing this will dramatically increase scan times
+            if (info.IsMissingEpisode || info.IsVirtualUnaired)
+            {
+                return result;
+            }
+
             string seriesTmdbId;
             info.SeriesProviderIds.TryGetValue(MetadataProviders.Tmdb.ToString(), out seriesTmdbId);