rtsp+tls example: need help

[jie]

I found an rtsp + tls example in 'gst-rtsp-server/examples/test-video.c'. In
server side: I click "./test-video". Terminal displayed as : "stream ready
at rtsp://127.0.0.1:8554/test"

So in client side, when I try "GST_DEBUG=3 gst-launch-1.0 rtspsrc
location=rtsp://127.0.0.1:8554/test", I got the error. 
jenny at Jenny-T510:~$  GST_DEBUG=3 gst-launch-1.0 rtspsrc
location=rtsp://127.0.0.1:8554/test
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Progress: (open) Opening Stream
Progress: (connect) Connecting to rtsp://127.0.0.1:8554/test
Progress: (open) Retrieving server options
0:00:00.143125161  4298  0x930b4f0 WARN                 rtspsrc
gstrtspsrc.c:4628:gst_rtspsrc_try_send:<rtspsrc0> error: Could not receive
message. (System error)
0:00:00.143343821  4298  0x930b4f0 WARN                 rtspsrc
gstrtspsrc.c:5825:gst_rtspsrc_open:<rtspsrc0> can't get sdp
ERROR: from element /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0: Could not
read from resource.
Additional debug info:
gstrtspsrc.c(4628): gst_rtspsrc_try_send ():
/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0:
Could not receive message. (System error)
ERROR: pipeline doesn't want to preroll.
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...


In server side, it displayed as: 
jenny at Jenny-T510:~/git/gst-rtsp-server/examples$ ./test-video
stream ready at rtsp://127.0.0.1:8554/test
/home/jenny/git/gst-rtsp-server/examples/.libs/lt-test-video: symbol lookup
error:
/home/jenny/git/gst-rtsp-server/gst/rtsp-server/.libs/libgstrtspserver-1.0.so.0:
undefined symbol: gst_rtsp_watch_set_send_backlog

Can somebody help in it? Thank you very much.



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