[gst-devel] How can I have two main loops in my program??

[namus]

In case ,when we are using g_main_loop_run() :

before we run g_main_loop_run() we are initializing  pipeline state to
GST_STATE_PAUSED
such as ..gst_element_set_state (pipeline,  GST_STATE_PAUSED)


my question is , should we need to initialise pipeline to GST_STATE_PAUSED
or GST_STATE_PLAYING ? in case of below mentioned :
while ((msg = gst_bus_pop (g_bus))) {
>     ... handle message ...
>     gst_message_unref (msg);
>   } 

please explain (or state any link) the significance of initialization of
pipeline .?

i tried with initialising with either of states mentioned above and an error
is obtained as shown below (if possible,please throw a light why this error
comes):
:373: In While() ,GST_MESSAGE_TYPE_NAME(msg) = state-changed  
: State changed
:385: State changed 1 -> 2
:373: In While() ,GST_MESSAGE_TYPE_NAME(msg) = state-changed  
:383: State changed
385: State changed 1 -> 2
:373: In While() ,GST_MESSAGE_TYPE_NAME(msg) = state-changed  
:383: State changed
385: State changed 1 -> 2
:373: In While() ,GST_MESSAGE_TYPE_NAME(msg) = state-changed  
:383: State changed
:385: State changed 1 -> 2
:373: In While() ,GST_MESSAGE_TYPE_NAME(msg) = state-changed  
:383: State changed
:385: State changed 2 -> 3
:373: In While() ,GST_MESSAGE_TYPE_NAME(msg) = stream-status  
:373: In While() ,GST_MESSAGE_TYPE_NAME(msg) = stream-status  
:373: In While() ,GST_MESSAGE_TYPE_NAME(msg) = error  
:417: Error: Internal data flow error. - Debug: gstbasesrc.c(2378):
gst_base_src_loop (): /GstPipeline:metadata-pipeline/GstFileSrc:file-source:
streaming task paused, reason not-linked (-1) 

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