[Bug 730944] New: glvideomixer: Got data flow before stream-start event

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=730944
  GStreamer | gst-plugins-bad | git

           Summary: glvideomixer: Got data flow before stream-start event
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: nicolas.dufresne at collabora.co.uk
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


There is a warning due to miss-ordering of event when using the mixer. Does not
seems to break for simple case, but we know it can confuse certain stream
synchronisation code.

gst-launch-1.0 videotestsrc ! video/x-raw,format=RGBA ! m. videotestsrc
pattern=18 background-color=0 ! video/x-raw,format=RGBA ! m. glvideomixer
name=m ! glimagesink

(gst-launch-1.0:7011): GStreamer-WARNING **:
gstpad.c:4021:gst_pad_push_data:<m:src> Got data flow before stream-start event

(gst-launch-1.0:7011): GStreamer-WARNING **:
gstpad.c:3787:gst_pad_chain_data_unchecked:<glimagesink0:sink> Got data flow
before stream-start event

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