rtpjitterbuffer retransmission does not work

[Борис]

Hi. I have rtsp server:

( appsrc name=vsrc ! nvvidconv ! video/x-raw(memory:NVMM),format=NV12 !
omxh264enc bitrate=20000000 control-rate=2 ! rtph264pay name=pay pt=96 !
identity name=pay0 )

And rtsp client:

rtspsrc location=rtsp://127.0.0.1:5703/vd latency=1000
tcp-timeout=2000000 protocols=GST_RTSP_LOWER_TRANS_TCP probation=1

! application/x-rtp,encoding-name=H264,payload=96 !  rtph264depay name=prs0

! h264parse ! avdec_h264 direct-rendering=FALSE

! videoconvert ! video/x-raw,format=(string)BGR

! appsink name=flowsink"


sometimes i detect rtp package loss. as i know from documentation
rtspsrc element's flag

"do-retransmission" is true by default, but no retransmission of
packets occurs. what could be wrong?
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