Merge pull request #977 from Lynxy/genpts

Always set ffmpeg flag +genpts when video stream is being copied

CONTRIBUTORS.md

@@ -21,6 +21,7 @@
  - [WillWill56](https://github.com/WillWill56)
  - [Liggy](https://github.com/Liggy)
  - [fruhnow](https://github.com/fruhnow)
+ - [Lynxy](https://github.com/Lynxy)
 
 # Emby Contributors
 

MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs

@@ -1904,7 +1904,7 @@ namespace MediaBrowser.Controller.MediaEncoding
             {
                 flags.Add("+ignidx");
             }
-            if (state.GenPtsInput)
+            if (state.GenPtsInput || string.Equals(state.OutputVideoCodec, "copy", StringComparison.OrdinalIgnoreCase))
             {
                 flags.Add("+genpts");
             }