[Bug 789462] New: Multi branched pipe freezes in case CPU overloaded

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=789462

            Bug ID: 789462
           Summary: Multi branched pipe freezes in case CPU overloaded
    Classification: Platform
           Product: GStreamer
           Version: 1.8.3
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gstreamer (core)
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: rouniy at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

So during custom plugin development I found that multi branched pipe freezes in
some cases.
According with my investigation I found that CPU overloading has critical
influence to this issue

For example pipe like this
===
gst-launch-1.0 rtspsrc location=rtsp://admin:admin@192.168.1.108 ! decodebin !
tee name=teebranch ! queue ! autovideosink teebranch. ! queue ! fakesink
===

in most cases works fine

but this one:
===
gst-launch-1.0 rtspsrc location=rtsp://admin:admin@192.168.1.108 ! decodebin !
tee name=teebranch ! queue ! autovideosink teebranch. ! queue ! x264enc !
fakesink
===
in most cases freezes

The different in the CPU consuming element - x264enc

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