audio issue in receiving rtsp streaming

[cfd new]

 If I use playbin, it works fine. How does playbin automatically handle streaming with and without audio?

    On Tuesday, November 15, 2022, 02:07:33 p.m. EST, cfd new <newcfd at yahoo.com> wrote:  
 
 I have a pipeline for video and audio. If rtsp streaming has both audio and video, it works fine. But if the rtsp streaming does not have audio, the pipeline will freezes.How to add audio part dynamically to the pipeline for rtsp streaming with audio?
  
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