[gstreamer-bugs] [Bug 637586] New: playbin2 fails to recognize subtitle caps from katedec

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=637586
  GStreamer | gst-plugins-base | git

           Summary: playbin2 fails to recognize subtitle caps from katedec
    Classification: Desktop
           Product: GStreamer
           Version: git
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: vincent.penquerch at collabora.co.uk
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


As discussed with slomo, playbin2 tries to get caps from katedec through
inputselector, but fails, as inputselector has no active pad yet.
The sequence of events is:
- katedec gets the first buffer (header), and sets src caps from its contents
- katedec forwards any delayed events (including newsegment events)
- subtitleoverlay tries to get caps from katedec, but fails

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