Fixed bug #900727: Phonon backend no longer plays .mp4 video files

Fixes: https://launchpad.net/bugs/900727

openlp/core/ui/media/phononplayer.py

@@ -51,6 +51,7 @@ ADDITIONAL_EXT = {
             u'video/x-matroska': [u'.mpv', u'.mkv'],
             u'video/x-wmv': [u'.wmv'],
             u'video/x-mpg': [u'.mpg'],
+            u'video/mpeg' : [u'.mp4', u'.mts'],
             u'video/x-ms-wmv': [u'.wmv']}
 
 
@@ -89,6 +90,7 @@ class PhononPlayer(MediaPlayer):
                 ext = u'*%s' % extension
                 if ext not in list:
                     list.append(ext)
+                    print ext
             log.info(u'MediaPlugin: %s additional extensions: %s' % (mimetype,
                 u' '.join(self.additional_extensions[mimetype])))