[gstreamer-bugs] [Bug 639778] New: discoverer: Drop new stream tags once preroll is done

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=639778
  GStreamer | gst-plugins-base | unspecified

           Summary: discoverer: Drop new stream tags once preroll is done
    Classification: Desktop
           Product: GStreamer
           Version: unspecified
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: arun at accosted.net
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


There can be a race between the pad event probe function and discoverer
processing since the former works on taglists that the latter might also be
using at the same time. I'm attaching a patch to fix this. The problem occured
randomly while running on a large number of files. The actual crash always
happened on a (random) FLAC file for me.

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