fix search index bug (#1231)

CHANGELOG.md

@@ -15,6 +15,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Fix transcoding some 10-bit content from media servers using VAAPI acceleration
 - Fix decoding of MPEG-4 Part 2 (e.g. DivX) content using NVIDIA acceleration
 - Fix color normalization from `bt470bg` to `bt709` using QSV acceleration
+- Fix adding files to search index with unknown video codec
 
 ### Changed
 - Use Poster artwork for XMLTV if available

ErsatzTV.Infrastructure/Search/SearchIndex.cs

@@ -96,7 +96,7 @@ public sealed class SearchIndex : ISearchIndex
         _initialized = false;
     }
 
-    public int Version => 34;
+    public int Version => 35;
 
     public async Task<bool> Initialize(
         ILocalFileSystem localFileSystem,
@@ -1153,8 +1153,11 @@ public sealed class SearchIndex : ISearchIndex
             }
 
             foreach (MediaStream videoStream in version.Streams.Filter(s => s.MediaStreamKind == MediaStreamKind.Video))
+            {
+                if (!string.IsNullOrWhiteSpace(videoStream.Codec))
                 {
                     doc.Add(new StringField(VideoCodecField, videoStream.Codec, Field.Store.NO));
+                }
 
                 Option<IPixelFormat> maybePixelFormat =
                     AvailablePixelFormats.ForPixelFormat(videoStream.PixelFormat, null);