gst_base_sink_wait_preroll

[zyukyunman]

The pipeline structure I have proposed is described as 

appsrc ->@@@@@@@@@@@@@@@@@@@@@@@@@-> queue -> fakesink
appsrc ->@nvstreammux--->nvconv--->demuxer at -> queue -> fakesink
appsrc ->@@@@@@@@@@@@@@@@@@@@@@@@@-> queue -> fakesink

However, when running, the pipeline always falls into a state that
"gst_base_sink_wait_preroll" in all "queue" elements is waiting all the
time. I am quite confused.
The part of gstream log are attached as follows.
how can i resolve this?



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