[gstreamer-bugs] [Bug 538176] New: State change trouble with decodebin and empty files

[GStreamer (bugzilla.gnome.org) <bug...@bu...>]

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  GStreamer | gstreamer (core) | Ver: 0.10.18
           Summary: State change trouble with decodebin and empty files
           Product: GStreamer
           Version: 0.10.18
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gstreamer (core)
        AssignedTo: gst...@li...
        ReportedBy: jo...@op...
         QAContact: gst...@li...
     GNOME version: Unspecified
   GNOME milestone: Unspecified


We have a pipeline containing a decodebin linked to a fakesink for metadata
retrieval. On every file processed, the previous source element (if any) is
replaced by a new source element using gst_element_make_from_uri().
gst_bus_add_signal_watch() is used to get signals off the bus.

This all works well until one tries to load an empty file. Any consequent
playback attempts have the following effects:
 1) No tag message is triggered, but no error message either;
 2) Calls to gst_element_get_state with GST_CLOCK_TIME_NONE never return.

Other kinds of erroneous files, like text files and images, are handled without
trouble.

A simple test application can be found here:

 http://svn.o-hand.com/repos/misc/trunk/gaku/

The tag reading code is in tag-reader.c which is pretty basic. I can try to
condense it into something simpler if that would be helpful.


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