Thanks for your help. I have change my transcode parameter to this, per your advice: #transcode{vcodec=mp4v,vb=400,acodec=mpga,ab=128}:duplicate{dst={standard{access=file, name=file:///tmp/1.mp4}} , dst={rtp{dst=63.23.35.161,port-video=1234,port-audio=1251,sdp=file:///tmp/1.sdp}} } The boradcast wor...