how to sync audio and video in playbin3

cfd new via gstreamer-devel <[email protected]> Mon, 21 Aug 2023 22:35:33 +0000 (UTC)

Newsgroups	gmane.comp.video.gstreamer.devel
Message-ID	<[email protected]>

I use playbin3 to display rtsp streaming and noticed audio is slightly behind video in the display. How to sync audio and video? Thanks for your kind help.
   Joe

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