[question]set output device in QT

[虞申鹏]

Hi,everyone.

This is a question about QT APP[player].

I know ,when i want to play the video to different display,
we can set the output device by gst-luncher command.

How to set the output device in QT APP?
Is it also applies to audio?
※The QT APP used playbin.

Or we must route the output device by GStreamer plug-in?

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YU
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