support null image encoder

1 files changed, 5 insertions, 2 deletions

diff --git a/MediaBrowser.Server.Implementations/UserViews/CollectionFolderImageProvider.cs b/MediaBrowser.Server.Implementations/UserViews/CollectionFolderImageProvider.cs
index 9247edadb..de0b0e758 100644
--- a/MediaBrowser.Server.Implementations/UserViews/CollectionFolderImageProvider.cs
+++ b/MediaBrowser.Server.Implementations/UserViews/CollectionFolderImageProvider.cs
@@ -10,6 +10,7 @@ using MediaBrowser.Server.Implementations.Photos;
 using MoreLinq;
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
 using System.Threading.Tasks;
 using CommonIO;
@@ -97,13 +98,15 @@ namespace MediaBrowser.Server.Implementations.UserViews
             return item is CollectionFolder;
         }
 
-        protected override async Task<bool> CreateImage(IHasImages item, List<BaseItem> itemsWithImages, string outputPath, ImageType imageType, int imageIndex)
+        protected override async Task<string> CreateImage(IHasImages item, List<BaseItem> itemsWithImages, string outputPathWithoutExtension, ImageType imageType, int imageIndex)
         {
+            var outputPath = Path.ChangeExtension(outputPathWithoutExtension, ".png");
+
             if (imageType == ImageType.Primary)
             {
                 if (itemsWithImages.Count == 0)
                 {
-                    return false;
+                    return null;
                 }
 
                 return await CreateThumbCollage(item, itemsWithImages, outputPath, 960, 540).ConfigureAwait(false);