Getting device-fd form playbin

[Mohammad-AL.Gmail]

I tried to issue
gst_child_proxy_get((GstObject*)pipeline, videosink::device-fd, & device_fd,
NULL); 
after switching the pipeline to PAUSE STATE (and waited till PAUSE is
accomplished) and before switching to PLAY STATE to be sure the v4l2 sink is
created, but still the same error.

Thanks and
Kindest Regards,
Salim

-----Original Message-----
From: Mohammad-AL.Gmail [mailto:AL.mohamed.salim at gmail.com] 
Sent: Thursday, February 28, 2013 11:30 AM
To: 'Discussion of the development of and with GStreamer'
Subject: Getting device-fd form playbin

Hi, 

I have created a playbin2 and able to play pipeline.

Now I wish to set some characteristics of display. I need device-fd of the
display.

I am trying to use gst_child_proxy_get((GstObject*)pipeline,
videosink::device-fd, & device_fd, NULL); But during runtime, the error is
returned:

No property in object player

Can anybody help me to hint at what is wrong?

Kindest Rgds,
Salim