Need clarification on gstcolorbalance

[Tim-Philipp Müller]

On Sun, 2012-05-20 at 13:17 +0530, Yogesh Marwaha wrote:
> Hi,
> 
> I'm trying to add options of contrast, brightness etc. in my app.
> GStreamer's videobalance and xvimagesink elements support
> GstColorBalance interface. But in case of xvimagesink, I'm unable
> to get a list of channels.
> 
> Following is the code snippet I'm using: -
> 
>     GstElement *a = gst_element_factory_make("xvimagesink",
> "gravity-playbin-video-a");
>     if(GST_IS_COLOR_BALANCE(a)){
>  (...)
> What could be the cause of problem? How should I do it properly?

Try adding a

  gst_element_set_state (a, GST_STATE_READY);

right after creating it.

Cheers
 -Tim