[Bug 736655] [gstbasesink] basesink preroll issue for some clips which audio is shorter than video.

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=736655
  GStreamer | gstreamer (core) | 1.2.3

--- Comment #1 from kevin <kevinbing.song at gmail.com> 2014-09-16 07:17:07 UTC ---
Below is my understand:
o    Change EOS event to GAP event is used to keep sink alive when one track is
shorter than other. So can select another track and sink can work rightly.
o    Gststreamsynchronizer will send GAP event when one track reach EOS and
another track still has data. And will send all tracks EOS when all track reach
EOS.
o    The shorter track sink can’t get buffer for preroll as another track is
prerolled and blocked on gst_pad_push() function. So can’t finish state change
to PAUSE.

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