diff --git a/MediaBrowser.Model/Entities/MediaStream.cs b/MediaBrowser.Model/Entities/MediaStream.cs
index e7e8d7cecd..4a269c55b5 100644
--- a/MediaBrowser.Model/Entities/MediaStream.cs
+++ b/MediaBrowser.Model/Entities/MediaStream.cs
@@ -197,34 +197,34 @@ namespace MediaBrowser.Model.Entities
                 {
                     if (i.IsInterlaced)
                     {
-                        return "1440I";
+                        return "1440i";
                     }
-                    return "1440P";
+                    return "1440p";
                 }
                 if (width >= 1900 || height >= 1000)
                 {
                     if (i.IsInterlaced)
                     {
-                        return "1080I";
+                        return "1080i";
                     }
-                    return "1080P";
+                    return "1080p";
                 }
                 if (width >= 1260 || height >= 700)
                 {
                     if (i.IsInterlaced)
                     {
-                        return "720I";
+                        return "720i";
                     }
-                    return "720P";
+                    return "720p";
                 }
                 if (width >= 700 || height >= 440)
                 {
 
                     if (i.IsInterlaced)
                     {
-                        return "480I";
+                        return "480i";
                     }
-                    return "480P";
+                    return "480p";
                 }
 
                 return "SD";