gstreamer android video-sink

[tony]

hello,
      i am trying development a android application to receive video from
another embeded linux platform,  they all have been tested when transfer
video from embeded linux to ubuntu14 and now i want to porting it to android
to receive the video, this android is based on tutorial5 and i just modified
following line:
     data->pipeline = gst_parse_launch("tcpclientsrc host=192.168.2.104
port=5000 ! gdpdepay ! rtph264depay ! avdec_h264 ! videoconvert ! fakesink
sync=false", &error);       
     but what ever i replace fakesink to autosink or other sinks, it just
give me message that :
*W/GLib+GLib-GObject: g_object_get_valist: object class 'GstPipeline' has no
property named 'video-sink' , * 
     i  have checked the document, it should be that no related video sink
is registered, i aso has following errors:
*_sdk_tutorials.tutorial_5 W/GLib+GLib-GObject: invalid cast from
'GstPipeline' to 'GstVideoOverlay'
07-30 14:47:53.300 30427-30427/com.gst_sdk_tutorials.tutorial_5 E/GLib:
gst_video_overlay_set_window_handle: assertion 'GST_IS_VIDEO_OVERLAY
(overlay)' failed*,  
   i am not sure it is related with my xoverlay sink not config correctly or
i just missed some plugin, can someone give some suggestions? thanks a lot!



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