gstreamer 0.10 to 1.0 and gtk2 to gtk3 errors

[laguillaumie sylvain]

hi list(s)

i try to port my app to gtk3/gst1.0 but have some errors i dont 
understand i can post my code if needed but does someone have an idear 
on the followings errors...

i post in pygtk and gst list but i have this crash since i used :

self.player.videosink = Gst.ElementFactory.make('xvimagesink')


/usr/lib/python2.7/dist-packages/gi/types.py:47: Warning: cannot 
register existing type `GstObject'
   return info.invoke(*args, **kwargs)
/usr/lib/python2.7/dist-packages/gi/types.py:47: Warning: 
g_once_init_leave: assertion `result != 0' failed
   return info.invoke(*args, **kwargs)
/usr/lib/python2.7/dist-packages/gi/types.py:47: Warning: 
g_type_register_static: assertion `parent_type > 0' failed
   return info.invoke(*args, **kwargs)
/usr/lib/python2.7/dist-packages/gi/types.py:47: Warning: interface type 
`GstImplementsInterface' or prerequisite type `<invalid>' invalid
   return info.invoke(*args, **kwargs)
/usr/lib/python2.7/dist-packages/gi/types.py:47: Warning: cannot add 
interface type `GstColorBalance' to type `GstPlayBin' which does not 
conform to prerequisite `GstImplementsInterface'
   return info.invoke(*args, **kwargs)
/usr/lib/python2.7/dist-packages/gi/types.py:47: Warning: cannot add 
interface type `GstColorBalance' to type `GstPlaySink' which does not 
conform to prerequisite `GstImplementsInterface'
   return info.invoke(*args, **kwargs)
/usr/lib/python2.7/dist-packages/gi/types.py:47: Warning: 
/build/buildd/glib2.0-2.34.1/./gobject/gsignal.c:2459: signal 
`value-changed' is invalid for instance `0x9f680a8'
   return info.invoke(*args, **kwargs)
/usr/lib/python2.7/dist-packages/gi/module.py:152: Warning: cannot 
register existing type `GstNavigation'
   g_type = info.get_g_type()
/usr/lib/python2.7/dist-packages/gi/module.py:156: Warning: 
g_type_get_qdata: assertion `node != NULL' failed
   type_ = g_type.pytype
/usr/lib/python2.7/dist-packages/gi/types.py:240: Warning: cannot 
register existing type `GstNavigation'
   register_interface_info(cls.__info__.get_g_type())
Traceback (most recent call last):
   File "/usr/lib/python2.7/dist-packages/gi/types.py", line 243, in mro
     return mro(cls)
   File "/usr/lib/python2.7/dist-packages/gi/types.py", line 257, in mro
     bases_of_subclasses += list(map(mro, C.__bases__)) + 
[list(C.__bases__)]
   File "/usr/lib/python2.7/dist-packages/gi/types.py", line 257, in mro
     bases_of_subclasses += list(map(mro, C.__bases__)) + 
[list(C.__bases__)]
   File "/usr/lib/python2.7/dist-packages/gi/types.py", line 257, in mro
     bases_of_subclasses += list(map(mro, C.__bases__)) + 
[list(C.__bases__)]
   File "/usr/lib/python2.7/dist-packages/gi/types.py", line 257, in mro
     bases_of_subclasses += list(map(mro, C.__bases__)) + 
[list(C.__bases__)]
   File "/usr/lib/python2.7/dist-packages/gi/types.py", line 257, in mro
     bases_of_subclasses += list(map(mro, C.__bases__)) + 
[list(C.__bases__)]
   File "/usr/lib/python2.7/dist-packages/gi/types.py", line 257, in mro
     bases_of_subclasses += list(map(mro, C.__bases__)) + 
[list(C.__bases__)]
   File "/usr/lib/python2.7/dist-packages/gi/types.py", line 262, in mro
     not_head = [s for s in bases_of_subclasses if candidate in s[1:]]
   File "/usr/lib/python2.7/dist-packages/gi/module.py", line 269, in 
__getattr__
     return getattr(self._introspection_module, name)
   File "/usr/lib/python2.7/dist-packages/gi/module.py", line 193, in 
__getattr__
     wrapper = metaclass(name, bases, dict_)
   File "/usr/lib/python2.7/dist-packages/gi/types.py", line 240, in 
__init__
     register_interface_info(cls.__info__.get_g_type())
TypeError: must be an interface
**
ERROR:/build/buildd/pygobject-3.4.0/gi/_gobject/pygobject.c:946:pygobject_new_full: 
assertion failed: (tp != NULL)
Abandon (core dumped)

thanks