[Bug 50116] "not negotiated" error after playing first file

[Patrick Fey]

Public bug reported:

Banshee plays the first music file in the library just fine. When it tries to play the next file in the playlist, banshee shows a "not negotiated" error message in a popup window.
Rhythmbox plays the first file just fine and when it can't play the second file, it tries to play the third file and so on. Only the first file plays successfully. No error message is displayed at all.
When launching a nautilus window with music files and opening one by double-click in totem, the file plays fine. If you keep the totem window open and double-click a second file in nautilus, totem shows a "not negotiated" error message in a popup window.
If you don't open the second file by double-click in nautilus, but via the film menu, totem seems to open the file, but it plays the first file again.

This happens regardless of the file type (i.e. it happens with both mp3
and ogg files). The error occurs since I upgraded from breezy to dapper
some days ago. I do not see this with totem-xine.

Steps to reproduce:
1. Open any media application with a gstreamer backend (totem, banshee, rhythmbox)
2. Play one file
3. Try to play another file or try to skip to the next file

Banshee console output:
nachtarbeiter at Einstein:~/.gnome2$ banshee
Debug: [17.06.2006 16:47:39] (Standard Wiedergabe-Engine) - GStreamer 0.10
Debug: [17.06.2006 16:47:39] (Audio-CD Kern initialisiert) -

(Banshee:15722): GdkPixbuf-WARNING **: GdkPixbufLoader finalized without
calling  gdk_pixbuf_loader_close() - this is not allowed. You must
explicitly end the da ta stream to the loader before dropping the last
reference.

(Banshee:15722): GdkPixbuf-WARNING **: GdkPixbufLoader finalized without
calling  gdk_pixbuf_loader_close() - this is not allowed. You must
explicitly end the da ta stream to the loader before dropping the last
reference.

(Banshee:15722): GStreamer-CRITICAL **: gst_element_set_state: assertion `GST_IS_ELEMENT (element)' failed
GST-DEBUG: not negotiated: gstbasetransform.c(1395): gst_base_transform_handle_buffer (): /playbin/abin/volume:not negotiated
Error: [17.06.2006 16:48:06] (Wiedergabe Fehler) - not negotiated

** Affects: gstreamer0.10 (Ubuntu)
     Importance: Untriaged
         Status: Unconfirmed

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"not negotiated" error after playing first file
https://launchpad.net/bugs/50116