can't link pads manualy

[Anton Olegovich]

I'm writing an app for android using gstreamer 1.0. I need to display 
video stream and some times, as required, to write the same stream to 
file. Now i'm in practic with manualy linking pads. I've got this code:

|  gst_bin_add_many(GST_BIN(data->video_pipeline),udpsrc,rtph264depay,avdec_h264,/*videorate,*/clockoverlay,tee,queue_video_sink,queue_file_sink,NULL);

   if (!gst_element_link_filtered (udpsrc,rtph264depay,udpsrc_caps))
GST_ERROR ("Can't link udpsrc and rtph264depay with caps");
   }

   if (!gst_element_link_many (rtph264depay,avdec_h264,/*videorate,*/clockoverlay,tee,NULL)){
       GST_ERROR ("Can't link many to tee");
   }

gst_object_unref (G_OBJECT(videorate_src_pad));//Возможно получится ошибка с пямятью
gst_caps_unref(videorate_caps);///Освобождаем caps


#if 1
     if(!gst_element_add_pad(tee,pad_surface_src))
         GST_ERROR("Cant add pad to tee");


     tee_src_pad_template =  gst_element_class_get_pad_template(GST_ELEMENT_GET_CLASS(tee),"src_%u");
     pad_surface_src = gst_element_request_pad(tee,tee_src_pad_template,NULL,NULL);

    if(!pad_surface_src){
     g_printerr ("Can't obtain request pad src for tee.\n");
    }

     pad_surface_sink = gst_element_get_static_pad(autovideosink,"sink");
     if(!pad_surface_sink){
         g_printerr ("Can't obtain request pad sink for autovideosink.\n");
        }


     if (gst_pad_link (pad_surface_src,pad_surface_sink)!=GST_PAD_LINK_OK){
         g_printerr ("Tee could not be linked.\n");
         gst_object_unref (data->video_pipeline);
         return -1;
     }
     gst_object_unref(pad_surface_sink);
#endif
|

all pads are initialized, but gst_pad_link does not returns 
GST_PAD_LINK_OK. Do you know why? May be i can't to link tee and 
autovideosink directly, may be i need some queue? but queue do more 
latency.

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