[Bug 755043] New: vtdec: iOS stream freezes

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=755043

            Bug ID: 755043
           Summary: vtdec: iOS stream freezes
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Mac OS
            Status: NEW
          Severity: major
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: nikolindima at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

sender raspberry pipeline: raspivid -t 0 -w 960 -h 540 -fps 30 -b 1500000 -pf
baseline -o - | gst-launch-1.0 -v fdsrc ! h264parse ! rtph264pay
config-interval=2 pt=96 mtu=1380 ! udpsink host=192.168.0.103 port=6000

receiver iphone pipeline : udpsrc port=6000 ! application/x-rtp, payload=96 !
rtph264depay ! h264parse ! vtdec ! glimagesink

With vtdec. No more broken colors or latency but have new bug. Avery 1-2 maybe
3 seconds get 1ms freeze. Test on iPhone 4s, iPhone 5 and iPad Retina. changes
of frame size or bitrate does not help. 40-50% CPU usage. 
If use decodebin - 90-100% CPU usage but no freezes. 

GST_LEVEL_WARNING -
https://www.dropbox.com/s/czb0etk1j2wapme/warnings_log.txt?dl=0
GST_LEVEL_DEBUG - https://www.dropbox.com/s/sd1igl9b6y83cr5/debug_log.txt?dl=0

GST_LEVEL_DEBUG iphone can't start stream. black screen and infinity log.

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