Some help with ghost pads please

[gstream at ccc2.com]

As an update I tried the below, changing the pad generation order,

 Pad src_1a_2 = vidmix.getRequestPad("sink_%d");
 vidmix_out.addPad(new GhostPad("sink_%d", vidmix.getRequestPad("sink_%d")));
 pipe.add(vidmix_out);
 Pad src_1a_2a = vidmix_out.getStaticPad("sink_%d");
 videobox1.getStaticPad("src").link(src_1a_2a);


Now I dont get an error, but the pipeline does not play


thx
Art