[Bug 661889] New: not-negotiated error when adding a text element to ges-gui

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=661889
  GStreamer | gst-editing-services | unspecified

           Summary: not-negotiated error when adding a text element to
                    ges-gui
    Classification: Platform
           Product: GStreamer
           Version: unspecified
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-editing-services
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: stephane.maniaci at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=199101)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=199101)
./ges-gui -> add text -> play

Toying with the ges-gui demo program in GES tree, and it seems I cannot add a
text element to the timeline. I'm joining the debug log, the interesting
excerpt is:


:00:11.912597005  5664  0x96b1418 INFO                 basesrc
gstbasesrc.c:2519:gst_base_src_loop:<titlesrc-bg> pausing after gst_pad_push()
= not-negotiated
0:00:11.912632345  5664  0x96b1418 WARN                 basesrc
gstbasesrc.c:2582:gst_base_src_loop:<titlesrc-bg> error: Internal data flow
error.
0:00:11.912650783  5664  0x96b1418 WARN                 basesrc
gstbasesrc.c:2582:gst_base_src_loop:<titlesrc-bg> error: streaming task paused,
reason not-negotiated (-4)
0:00:11.912701768  5664  0x96b1418 INFO        GST_ERROR_SYSTEM
gstelement.c:1931:gst_element_message_full:<titlesrc-bg> posting message:
Internal data flow error.
0:00:11.912735711  5664  0x96b1418 INFO        GST_ERROR_SYSTEM
gstelement.c:1954:gst_element_message_full:<titlesrc-bg> posted error message:
Internal data flow error.

Feel free to re-assign to gst-plugins-base, I'm not sure since this is
triggered with ./ges-gui. Also note the log has to be viewed with less -R,
GST_NO_COLOR=1 doesn't seem to be working here.

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