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1 files changed, 2 insertions, 2 deletions

diff --git a/MediaBrowser.Controller/MediaEncoding/IMediaEncoder.cs b/MediaBrowser.Controller/MediaEncoding/IMediaEncoder.cs
index 83be267a7..f830b9f29 100644
--- a/MediaBrowser.Controller/MediaEncoding/IMediaEncoder.cs
+++ b/MediaBrowser.Controller/MediaEncoding/IMediaEncoder.cs
@@ -202,14 +202,14 @@ namespace MediaBrowser.Controller.MediaEncoding
         /// <param name="path">The to the .vob files.</param>
         /// <param name="titleNumber">The title number to start with.</param>
         /// <returns>A playlist.</returns>
-        IEnumerable<string> GetPrimaryPlaylistVobFiles(string path, uint? titleNumber);
+        IReadOnlyList<string> GetPrimaryPlaylistVobFiles(string path, uint? titleNumber);
 
         /// <summary>
         /// Gets the primary playlist of .m2ts files.
         /// </summary>
         /// <param name="path">The to the .m2ts files.</param>
         /// <returns>A playlist.</returns>
-        IEnumerable<string> GetPrimaryPlaylistM2tsFiles(string path);
+        IReadOnlyList<string> GetPrimaryPlaylistM2tsFiles(string path);
 
         /// <summary>
         /// Generates a FFmpeg concat config for the source.