Gst Parse Launch Properties

[iesx]

I got it. 
One more question.
Do you know how to use this command?

gst_child_proxy_set(videomixer, "sink_1::xpos",176,
"sink_1::ypos",144,NULL);
or even
gst_child_proxy_set(pipeline, "mixer::sink_1::xpos",176,
"mixer::sink_1::ypos",144,NULL); 

Is it same like this command?
pad=gst_element_get_static_pad(mixer,"sink_1");
g_object_set (G_OBJECT (pad1), "xpos", 176, NULL);
g_object_set (G_OBJECT (pad1), "ypos", 144, NULL); 

Means i need to declare pad first and link the pad with
gst_child_proxy........... like below
GstPad *pad=gst_child_proxy_sex(videomixer,
"sink_1::xpos",.....................,NULL);
 
Or is there any other way to set position of video except using videobox ?




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