[Bug 686153] New: [playbin] Gapless using about-to-finish appears broken

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=686153
  GStreamer | gst-plugins-base | 1.x

           Summary: [playbin] Gapless using about-to-finish appears broken
    Classification: Platform
           Product: GStreamer
           Version: 1.x
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: m-gbugzilla at 8d.no
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=226467)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=226467)
Shell output, playbin gapless test

So, appears that playbin in GStreamer1.0 never resets the seek when switching
from one file to the next. Result: Playing two or more files, each longer than
the other, the first file is played normally. Then, gaplessly, the next file is
played from the timestamp that was used on the original file. And so on.


Attached: Shell output from the following:

1. Compile a test for about-to-finish/gapless playback using GStreamer0.10.
2. Do gapless playback, working.
3. Repeat for GStreamer1.0.
4. Do gapless playback, confirm that the audio output never seeks to the
beginning of the next file.
5. Print GStreamer versions used on the system (Debian)

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