stop pipeline into a callback funtion.

[Alejandro Vázquez]

Hi All.

I want to know if it is right to modify the status of a pipeline within a
callback.
The application works but I'm not sure if it can cause a problem in the
future.

e.g.

...
GstPad *pad = gst_element_get_static_pad(videoScr, "src");
g_signal_connect(pad, "notify::caps", G_CALLBACK(video_changed), NULL);
...

video_changed
{
...
gst_element_set_state(GST_ELEMENT(pipeline), GST_STATE_PAUSED);
...
}

Regards!
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