How to capture a GstRTPRetransmission event on the client's side

[Panagiotis Mousouliotis]

Hello,

I use this pair of client-server pipelines:

server:
gst-launch-1.0 -v udpsrc port=2000 ! application/x-rtp,payload=127  !
rtpjitterbuffer latency=50 do-retransmission=true ! rtph264depay !
h264parse ! avdec_h264 ! xvimagesink sync=false

client:
gst-launch-1.0 -v v4l2src device=/dev/video1 !
video/x-h264,width=640,height=480,framerate=30/1 ! h264parse ! rtph264pay
pt=127 ! rtprtxqueue ! udpsink host=localhost port=2000 sync=false

and I would like somehow to capture (in my code) on the client's side the
GstRTPRetransmission event, which is sent upstream by the rtpjitterbuffer
element.

Can you help me?
I tried to find something in the documentation but apparently I didn't do
much.

Thank you very much for your time,
Panos
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