[longomatch] Set the correct file extension for new capture files

[Andoni Morales Alastruey <amorales src gnome org>]

commit 81324c2eb2644ee96965826ad7c6577a954cc90d
Author: Andoni Morales Alastruey <ylatuya gmail com>
Date:   Wed Jun 26 14:45:42 2013 +0200

    Set the correct file extension for new capture files

 .../Gui/Component/ProjectDetailsWidget.cs          |   16 ++++++----------
 1 files changed, 6 insertions(+), 10 deletions(-)
---
diff --git a/LongoMatch.GUI/Gui/Component/ProjectDetailsWidget.cs 
b/LongoMatch.GUI/Gui/Component/ProjectDetailsWidget.cs
index ee02fea..6dd233d 100644
--- a/LongoMatch.GUI/Gui/Component/ProjectDetailsWidget.cs
+++ b/LongoMatch.GUI/Gui/Component/ProjectDetailsWidget.cs
@@ -446,16 +446,12 @@ namespace LongoMatch.Gui.Component
                        FileChooserDialog fChooser = null;
 
                        if(useType == ProjectType.CaptureProject || useType == ProjectType.URICaptureProject) 
{
-                               fChooser = new FileChooserDialog(Catalog.GetString("Output file"),
-                                                                (Gtk.Window)this.Toplevel,
-                                                                FileChooserAction.Save,
-                                                                "gtk-cancel",ResponseType.Cancel,
-                                                                "gtk-save",ResponseType.Accept);
-                               fChooser.SetCurrentFolder(Config.VideosDir);
-                               fChooser.DoOverwriteConfirmation = true;
-                               if(fChooser.Run() == (int)ResponseType.Accept)
-                                       fileEntry.Text = fChooser.Filename;
-                               fChooser.Destroy();
+                               string filename;
+                               
+                               filename = FileChooserHelper.SaveFile (this, Catalog.GetString("Output file"),
+                                                                      "Capture.mp4", Config.VideosDir, "MP4",
+                                                                      new string[] {".mp4"});
+                               fileEntry.Text = System.IO.Path.ChangeExtension(filename, "mp4");
 
                        } else  {
                                fChooser = new FileChooserDialog(Catalog.GetString("Open file..."),