check that we have rst plugin before supposing we can do jingle. Fixes #6910

src/common/gajim.py

@@ -166,8 +166,17 @@ HAVE_LATEX = False
 
 HAVE_FARSIGHT = True
 try:
-    __import__('farsight')
+    import farsight
-    __import__('gst')
+    import gst
+    import glib
+    try:
+        conference = gst.element_factory_make('fsrtpconference')
+        session = conference.new_session(farsight.MEDIA_TYPE_AUDIO)
+        del session
+        del conference
+    except glib.GError:
+        HAVE_FARSIGHT = False
+
 except ImportError:
     HAVE_FARSIGHT = False
 gajim_identity = {'type': 'pc', 'category': 'client', 'name': 'Gajim'}

src/features_window.py

@@ -105,7 +105,7 @@ class FeaturesWindow:
                 _('Requires python-docutils.')),
             _('Audio / Video'): (self.farsight_available,
                 _('Ability to start audio and video chat.'),
-                        _('Requires python-farsight.'),
+                _('Requires python-farsight and gstreamer-plugins-bad.'),
                 _('Feature not available under Windows.')),
         }
 

src/gajim.py

@@ -40,7 +40,8 @@ demandimport.enable()
 demandimport.ignore += ['gobject._gobject', 'libasyncns', 'i18n',
     'logging.NullHandler', 'dbus.glib', 'dbus.service',
     'command_system.implementation.standard', 'OpenSSL.SSL', 'OpenSSL.crypto',
-    'common.sleepy', 'DLFCN', 'dl', 'xml.sax', 'xml.sax.handler', 'ic']
+    'common.sleepy', 'DLFCN', 'dl', 'xml.sax', 'xml.sax.handler', 'ic',
+    'farsight']
 
 import os
 import sys