Could you tell me the meaning of 'Should have obtained video_window_handle by now!' ?

[박민호]

 I am building GTK+ & Gstreamer with 4 network IP cameras. But I have a problem with 

' gst_element_set_state (source_data.pipeline[0] , GST_STATE_PLAYING)' function.

I declared pipeline[4] because I will use 4 cameras. But gst_element_set_state() function only display the last video window.

Currently 4 videos  display on not 4 drawing areas but one drawing area. 

I don't know how to display on 4 drawing areas with 4 cameras.

cf. env : ubuntu, gtk+3.0, gstreamer 1.8.3

Thank you for any reply in advance.

 

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