[Bug 681642] New: [0.11] basesink: drops or duplicates buffers when dumping oggdemux output

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=681642
  GStreamer | gstreamer (core) | 0.11.x

           Summary: [0.11] basesink: drops or duplicates buffers when
                    dumping oggdemux output
    Classification: Platform
           Product: GStreamer
           Version: 0.11.x
        OS/Version: Linux
            Status: NEW
          Severity: critical
          Priority: Normal
         Component: gstreamer (core)
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: t.i.m at zen.co.uk
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


So ... no idea if this is in fact a basesink issue, but here goes: when dumping
oggdemux buffers to stdout in gst-launch with queue ! fakesink silent=false, it
seems that (a) not all buffers are shown and, (b) sometimes buffers are shown
multiple times.

Not 100% sure what the trigger is, at first I thought it was queue related, but
seems not.

Reproduce with:

$ for i in `seq 1 5`; do gst-launch-1.0 filesrc location=video.ogg ! oggdemux
name=d  d. ! queue ! fakesink async=false silent=false  d. ! queue ! fakesink
async=false silent=false -v 2>&1 | grep chain | grep 'offset_end: -1' ; echo
=========; done

Each iteration should show 6 header buffers, 3 for the vorbis stream and 3 for
the theora stream. There should be 4 small packets and 2 larger packets.

$ for i in `seq 1 5`; do gst-launch-1.0 filesrc location=video.ogg ! oggdemux
name=d  d. ! queue ! fakesink silent=false  d. ! queue ! fakesink silent=false
-v 2>&1 | grep chain | grep 'offset_end: -1' ; echo =========; done
chain fakesink1 30 bytes flags: 00000040 discont ) 0x7f67bc0079d0
chain fakesink1 30 bytes flags: 00000040 discont ) 0x7f67bc0079d0
chain fakesink1 30 bytes flags: 00000040 discont ) 0x7f67bc0079d0
chain fakesink1 30 bytes flags: 00000040 discont ) 0x7f67bc0079d0
=========
chain fakesink1 30 bytes flags: 00000040 discont ) 0x16e8a10
chain fakesink1 95 bytes flags: 00000000 ) 0x16e8b20
chain fakesink1 3484 bytes flags: 00000000 ) 0x16e8c30
chain fakesink0 97 bytes flags: 00000000 ) 0x16e87f0
chain fakesink0 97 bytes flags: 00000000 ) 0x16e87f0
chain fakesink0 97 bytes flags: 00000000 ) 0x16e87f0
=========
chain fakesink0 42 bytes flags: 00000040 discont ) 0xc206e0
chain fakesink0 42 bytes flags: 00000040 discont ) 0xc206e0
chain fakesink0 42 bytes flags: 00000040 discont ) 0xc206e0
chain fakesink0 42 bytes flags: 00000040 discont ) 0xc206e0
=========
chain fakesink0 42 bytes flags: 00000040 discont ) 0x1f8c6a0
chain fakesink0 42 bytes flags: 00000040 discont ) 0x1f8c6a0
chain fakesink0 42 bytes flags: 00000040 discont ) 0x1f8c6a0
chain fakesink0 42 bytes flags: 00000040 discont ) 0x1f8c6a0
chain fakesink0 42 bytes flags: 00000040 discont ) 0x1f8c6a0
chain fakesink0 42 bytes flags: 00000040 discont ) 0x1f8c6a0
=========
chain fakesink1 30 bytes flags: 00000040 discont ) 0x172da10
chain fakesink1 30 bytes flags: 00000040 discont ) 0x172da10
chain fakesink1 30 bytes flags: 00000040 discont ) 0x172da10
=========

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