[longomatch] Discover file in a Task to avoid blocking the main thread

[Andoni Morales Alastruey <amorales src gnome org>]

commit ddf9d2fc05e81ba403df834782926e0333926413
Author: Andoni Morales Alastruey <ylatuya gmail com>
Date:   Wed Nov 26 16:33:24 2014 +0100

    Discover file in a Task to avoid blocking the main thread

 LongoMatch.GUI.Helpers/Misc.cs |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)
---
diff --git a/LongoMatch.GUI.Helpers/Misc.cs b/LongoMatch.GUI.Helpers/Misc.cs
index 970eed7..4e547ab 100644
--- a/LongoMatch.GUI.Helpers/Misc.cs
+++ b/LongoMatch.GUI.Helpers/Misc.cs
@@ -30,6 +30,7 @@ using System.Collections.Generic;
 using LongoMatch.Core.Store;
 using LongoMatch.Core.Interfaces.GUI;
 using LongoMatch.Core.Interfaces.Multimedia;
+using System.Threading.Tasks;
 
 namespace LongoMatch.Gui.Helpers
 {
@@ -299,8 +300,16 @@ namespace LongoMatch.Gui.Helpers
                                busy = gui.BusyDialog (Catalog.GetString("Analyzing video 
file:")+"\n"+filename,
                                                       parent);
                                busy.Show ();
-                               mediaFile = multimedia.DiscoverFile (filename);
+                               
+                               Task task = new Task ( () => {
+                                       mediaFile = multimedia.DiscoverFile (filename);
+                               });
+                               task.Start ();
+                               task.Wait (6000);
                                busy.Destroy ();
+                               if (mediaFile == null) {
+                                       throw new Exception(Catalog.GetString("Timeout parsing file."));
+                               }
 
                                if(!mediaFile.HasVideo || mediaFile.VideoCodec == "")
                                        throw new Exception(Catalog.GetString("This file doesn't contain a 
video stream."));