[gstreamer-bugs] [Bug 631993] New: [flacparse] imperfect timestamping

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=631993
  GStreamer | gst-plugins-bad | git

           Summary: [flacparse] imperfect timestamping
    Classification: Desktop
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: t.i.m at zen.co.uk
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


gst-launch-0.10 http://media.xiph.org/BBB/BigBuckBunny-stereo.flac ! flacparse
! identity check-imperfect-timestamp=true ! fakesink -m
...
Got message #100 from element "identity0" (element): imperfect-timestamp,
prev-timestamp=(guint64)6058666666, prev-duration=(guint64)85333333,
prev-offset=(guint64)6143999999, prev-offset-end=(guint64)294912,
cur-timestamp=(guint64)6144000000, cur-duration=(guint64)85333333,
cur-offset=(guint64)6229333333, cur-offset-end=(guint64)299008;
Got message #101 from element "identity0" (element): imperfect-timestamp,
prev-timestamp=(guint64)6314666666, prev-duration=(guint64)85333333,
prev-offset=(guint64)6399999999, prev-offset-end=(guint64)307200,
cur-timestamp=(guint64)6400000000, cur-duration=(guint64)85333333,
cur-offset=(guint64)6485333333, cur-offset-end=(guint64)311296;
Got message #102 from element "identity0" (element): imperfect-timestamp,
prev-timestamp=(guint64)6570666666, prev-duration=(guint64)85333333,
prev-offset=(guint64)6655999999, prev-offset-end=(guint64)319488,
cur-timestamp=(guint64)6656000000, cur-duration=(guint64)85333333,
cur-offset=(guint64)6741333333, cur-offset-end=(guint64)323584;
...


This messes up transcoding to vorbis big time, because vorbisenc resets the
encoder whenever there's a discontinuity that's too large, which causes nasty
crackles/pops when played back.

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