gst_structure_get_int(structure, "width", &caps_width);
gst_structure_get_int(structure, "height", &caps_height);
gst_structure_get_int(structure, "fps", &caps_fps);
gst_structure_get_int(structure, "width", &caps_width);
gst_structure_get_int(structure, "height", &caps_height);
gst_structure_get_int(structure, "fps", &caps_fps);