tsdemux: Delayed linking failed

[quang_openstack]

Hi everyone, 
Today I try to test fdkaac gstreamer plugin on Jetson TX1 with
*Encoder*
gst-launch-1.0 audiotestsrc ! audioconvert ! 'audio/x-raw,
format=(string)S16LE, rate=(int)48000, channels=(int)2' ! fdkaacenc !
mpegtsmux ! udpsink host=$CLIENT_IP port=5000

*Decoder*
gst-launch-1.0 udpsrc port=5000 ! tsdemux ! fdkaacdec ! audioconvert !
alsasink device=aux_plug -e


But I got the the error on decoder side
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
WARNING: from element /GstPipeline:pipeline0/GstTSDemux:tsdemux0: Delayed
linking failed.
Additional debug info:
./grammar.y(510): gst_parse_no_more_pads ():
/GstPipeline:pipeline0/GstTSDemux:tsdemux0:
failed delayed linking some pad of GstTSDemux named tsdemux0 to some pad of
GstFdkAacDec named fdkaacdec0
ERROR: from element /GstPipeline:pipeline0/GstUDPSrc:udpsrc0: Internal data
stream error.
Additional debug info:
gstbasesrc.c(2939): gst_base_src_loop ():
/GstPipeline:pipeline0/GstUDPSrc:udpsrc0:
streaming stopped, reason not-linked (-1)
EOS on shutdown enabled -- waiting for EOS after Error
Waiting for EOS...


Are there any body got the same problem? Or some one can give me some
suggestion?
Thank in advance.
P.S.: I tested with faac and faad, it works normally but not fdkaac



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