Qt media player and gstreamer

[joecfd]

A gstreamer pipeline is created inside my qt app to play udpsrc to alsa(sink)
on ubuntu. It is in playing state when the app is launched. If an audio file
is played with qt media player in the app, this pipeline has to be
destroyed. Otherwise, qt media player will not play. After audio file is
finished in qt media player and qt media player is destroyed, the gstreamer
pipeline can not set back to playing state after it is recreated. I turned
off pulse audio globally and got no luck. What could be the causes? Thanks
for you helps in advance.



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