[gstreamer-bugs] [Bug 327680] New: Add DRAIN event

[GStreamer (bugzilla.gnome.org)]

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 GStreamer | gstreamer (core) | Ver: HEAD CVS

           Summary: Add DRAIN event
           Product: GStreamer
           Version: HEAD CVS
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Keywords: API
          Severity: normal
          Priority: Normal
         Component: gstreamer (core)
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: thaytan at mad.scientist.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


A 'DRAIN' event that allows an upstream element to wait until all downstream
data
has been presented/streamed/output-to-disk would be useful. 

The primary use case is for presentation sequences, such as DVD menus or still
frames, that have a timeout - eg a 2 second still, or a 30 second menu timeout
before selecting a default option.

The timeout/wait should not begin until the still frame or menu has been
presented to the user, otherwise the duration will be shortened by the size of
any downstream queued content.


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