Backport pull request #12065 from jellyfin/release-10.9.z

Make m2ts extension case-insensitive

Original-merge: f2a5ccf10206218e1084ee53aaa7284b7be3ddec

Merged-by: Bond-009 <bond.009@outlook.com>

Backported-by: Joshua M. Boniface <joshua@boniface.me>

MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs

@@ -1155,10 +1155,10 @@ namespace MediaBrowser.MediaEncoding.Encoder
 
             // Get all files from the BDMV/STREAMING directory
             // Only return playable local .m2ts files
+            var files = _fileSystem.GetFiles(Path.Join(path, "BDMV", "STREAM")).ToList();
             return validPlaybackFiles
-                .Select(f => _fileSystem.GetFileInfo(Path.Join(path, "BDMV", "STREAM", f)))
-                .Where(f => f.Exists)
-                .Select(f => f.FullName)
+                .Select(validFile => files.FirstOrDefault(f => Path.GetFileName(f.FullName.AsSpan()).Equals(validFile, StringComparison.OrdinalIgnoreCase))?.FullName)
+                .Where(f => f is not null)
                 .ToList();
         }