Bug 28886

(was first reported here: https://bugzilla.gnome.org/show_bug.cgi?id=622950 )

On Muji, 2 EmpathyPPA. We both have jabber.fr accounts. We both launch Muji
with "Conference".

I was on ubuntu-fr@chat.jabberfr.org with status "Accepted" (could see my
video).
Another user comes, I can see him in Muji. He tells me he has also the status
"accepted".

There my Muji crashes. My correspondant's Muji does not crash. 

My log :


$ VIDEO_DEVICE=/dev/video0 python new-call-demo/callui.py
* starting audio call
Showing window
* StateChanged:
 State: Pending Initiator (1)
 Flags: None
    Reason: actor: 0 reason: 0 dbus_reason: ''
    Details:
      None
* StateChanged:
 State: Pending Receiver (2)
 Flags: None
    Reason: actor: 0 reason: 0 dbus_reason: ''
    Details:
      None
* StateChanged:
 State: Accepted (3)
 Flags: None
    Reason: actor: 0 reason: 0 dbus_reason: ''
    Details:
      None
libv4lconvert: Error decompressing JPEG: unknown huffman code: 0000ffff
Adding frame to position 1

** (callui.py:6582): WARNING **: Error creating GUPnP context: Ressource
temporairement non disponible

Erreur de segmentation (core dumped)



**************************:
My correspondant's log:

VIDEO_DEVICE=/dev/video0 python new-call-demo/callui.py
/usr/share/themes/Win2-7Original/gtk-2.0/gtkrc:844: Incapable de localiser le
fichier image dans le chemin des pixmaps : « Panel/panel-bg-30px.png »
* starting video call
Showing window
* StateChanged:
State: Pending Initiator (1)
Flags: None
Reason: actor: 0 reason: 0 dbus_reason: ''
Details:
None
Adding frame to position 1
* StateChanged:
State: Pending Receiver (2)
Flags: None
Reason: actor: 0 reason: 0 dbus_reason: ''
Details:
None
* StateChanged:
State: Accepted (3)
Flags: None
Reason: actor: 0 reason: 0 dbus_reason: ''
Details:
None
* StateChanged:
State: Ended (4)
Flags: None
Reason: actor: 0 reason: 0 dbus_reason: ''
Details:
None
Traceback (most recent call last):
* File "/home/paul/new-call-demo/callchannelui.py", line 335 in window_closed
self.channel.conference.pipeline.remove(v.sink)
AttributeError: 'NoneType' object has no attribute 'pipeline' 
* StateChanged:
State: Ended (4)
Flags: None
Reason: actor: 0 reason: 0 dbus_reason: ''
Details:
None