RTP retransmission mechanism

[thxjd]

Hi, I am trying the rtp retransmission mechanism on my jetson tx2 and the
pipelines are mentioned below: 

Sender: 
gst-launch-1.0 -v rtpbin name=rtpbin audiotestsrc freq=1000 ! audioconvert !
alawenc ! rtppcmapay ! rtprtxqueue ! rtpbin.send_rtp_sink_0
rtpbin.send_rtp_src_0 ! udpsink host=192.154.10.20 port=5000
rtpbin.send_rtcp_src_0 ! udpsink host=192.154.10.20 port=5001 sync=false
udpsrc port=5005 ! rtpbin.recv_rtcp_sink_0 

Receiver: 
gst-launch-1.0 -v rtpbin name=rtpbin do-retransmission=true udpsrc port=5000
caps="application/x-rtp, media=(string)audio, clock-rate=(int)8000,
encoding-name=(string)PCMA, payload=8" ! rtpbin.recv_rtp_sink_0 rtpbin. !
rtppcmadepay ! alawdec ! alsasink sync=false udpsrc port=5001 !
rtpbin.recv_rtcp_sink_0 rtpbin.send_rtcp_src_0 ! udpsink host=192.154.10.21
port=5005 sync=false

If I set 10% packet loss on network, I still hear audio glitch and can't
receive any rtcp packet in sender side according wireshark. Is there
something wrong? Thank you very much.



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