can't link pads manualy

[Stefan Sauer]

On 09/07/2014 12:54 PM, Anton Olegovich wrote:
>
> 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);|
|You just want to do ||gst_element_request_pad() here.|
> |
>
>    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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