gst_element_query_position and gst_element_query_duration always returns 0

[deepthips]

I have a pipeline  : souphttpsrc -> id3demux -> ac3parse -> myaudioSink
In this case, gst_element_query_position and gst_element_query_duration
always returns 0. 

But  the below pipeline works fine: 

neonhttpsrc -> id3demux ->  mp3parse -> myaudioSink.

Below is the function which fails:


    GstFormat fmt = GST_FORMAT_TIME;
    gint64 pos;
    qint64 dur;
    if (gst_element_query_position(GST_ELEMENT(getPipeline()), &fmt, &pos)
&&
        gst_element_query_duration(GST_ELEMENT(getPipeline()), &fmt, &dur))
    {
        
    }
    else
    {
        printf("GStreamer: Could not query position and duration\n");
    }


Any suggestions?



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