1 files changed, 12 insertions, 0 deletions
diff --git a/MediaBrowser.Controller/IO/StreamHelper.cs b/MediaBrowser.Controller/IO/StreamHelper.cs
index 168d4b8c6..af97a0233 100644
--- a/MediaBrowser.Controller/IO/StreamHelper.cs
+++ b/MediaBrowser.Controller/IO/StreamHelper.cs
@@ -1,5 +1,6 @@
 using System.IO;
 using System.Threading;
+using System;
 
 namespace MediaBrowser.Controller.IO
 {
@@ -7,6 +8,11 @@ namespace MediaBrowser.Controller.IO
     {
         public static void CopyTo(Stream source, Stream destination, int bufferSize, CancellationToken cancellationToken)
         {
+            CopyTo(source, destination, bufferSize, null, cancellationToken);
+        }
+
+        public static void CopyTo(Stream source, Stream destination, int bufferSize, Action onStarted, CancellationToken cancellationToken)
+        {
             byte[] buffer = new byte[bufferSize];
             int read;
             while ((read = source.Read(buffer, 0, buffer.Length)) != 0)
@@ -14,6 +20,12 @@ namespace MediaBrowser.Controller.IO
                 cancellationToken.ThrowIfCancellationRequested();
 
                 destination.Write(buffer, 0, read);
+
+                if (onStarted != null)
+                {
+                    onStarted();
+                    onStarted = null;
+                }
             }
         }
     }