[gst-devel] rtp transmit occur "not-negotiated (-4)" error

[guodecn]

attach the print information:
server:
gst-launch-0.10 -v videotestsrc ! x264enc ! rtph264pay ! udpsink
host=127.0.0.1 port=40000 sync=false 

Setting pipeline to PAUSED ...
/GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0.GstPad:src: caps =
video/x-raw-yuv, format=(fourcc)I420, color-matrix=(string)sdtv,
chroma-site=(string)mpeg2, width=(int)320, height=(int)240,
framerate=(fraction)30/1
Pipeline is PREROLLING ...
/GstPipeline:pipeline0/GstX264Enc:x264enc0.GstPad:src: caps = video/x-h264,
width=(int)320, height=(int)240, framerate=(fraction)30/1,
pixel-aspect-ratio=(fraction)1/1,
codec_data=(buffer)014d4015ffe10017674d4015eca0a0fd8088000003000bb9aca00078b16cb001000468ebecb2,
stream-format=(string)avc, alignment=(string)au
/GstPipeline:pipeline0/GstX264Enc:x264enc0.GstPad:sink: caps =
video/x-raw-yuv, format=(fourcc)I420, color-matrix=(string)sdtv,
chroma-site=(string)mpeg2, width=(int)320, height=(int)240,
framerate=(fraction)30/1
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0.GstPad:src: caps =
application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)\"Z01AFeygoP2AiAAAAwALuaygAHixbLA\\=\\,aOvssg\\=\\=\",
payload=(int)96, ssrc=(uint)1960011877, clock-base=(uint)3818509597,
seqnum-base=(uint)21266
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0.GstPad:sink: caps =
video/x-h264, width=(int)320, height=(int)240, framerate=(fraction)30/1,
pixel-aspect-ratio=(fraction)1/1,
codec_data=(buffer)014d4015ffe10017674d4015eca0a0fd8088000003000bb9aca00078b16cb001000468ebecb2,
stream-format=(string)avc, alignment=(string)au
/GstPipeline:pipeline0/GstUDPSink:udpsink0.GstPad:sink: caps =
application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)\"Z01AFeygoP2AiAAAAwALuaygAHixbLA\\=\\,aOvssg\\=\\=\",
payload=(int)96, ssrc=(uint)1960011877, clock-base=(uint)3818509597,
seqnum-base=(uint)21266
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock


client:
gst-launch-0.10 -v udpsrc
caps="application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)H264,payload=(int)96,ssrc=(uint)1960011877,clock-base=(uint)3818509597,seqnum-base=(uint)21266"
port=40000 ! rtph264depay ! decodebin ! xvimagesink

Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
/GstPipeline:pipeline0/GstRtpH264Depay:rtph264depay0.GstPad:src: caps =
video/x-h264
/GstPipeline:pipeline0/GstRtpH264Depay:rtph264depay0.GstPad:sink: caps =
application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264, payload=(int)96, ssrc=(uint)1960011877,
clock-base=(uint)3818509597, seqnum-base=(uint)21266
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind.GstPad:src:
caps = video/x-h264
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind.GstPad:sink:
caps = video/x-h264
/GstPipeline:pipeline0/GstDecodeBin:decodebin0.GstGhostPad:sink: caps =
video/x-h264
/GstPipeline:pipeline0/GstDecodeBin:decodebin0.GstGhostPad:sink.GstProxyPad:proxypad0:
caps = video/x-h264
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/ffdec_h264:ffdec_h2640.GstPad:sink:
caps = video/x-h264
/GstPipeline:pipeline0/GstDecodeBin:decodebin0.GstGhostPad:src0: caps =
video/x-raw-yuv, width=(int)320, height=(int)240,
framerate=(fraction)536870912/1, format=(fourcc)I420,
interlaced=(boolean)false, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/ffdec_h264:ffdec_h2640.GstPad:src:
caps = video/x-raw-yuv, width=(int)320, height=(int)240,
framerate=(fraction)536870912/1, format=(fourcc)I420,
interlaced=(boolean)false, pixel-aspect-ratio=(fraction)1/1
ERROR: from element /GstPipeline:pipeline0/GstUDPSrc:udpsrc0: Internal data
flow error.
Additional debug info:
gstbasesrc.c(2550): gst_base_src_loop ():
/GstPipeline:pipeline0/GstUDPSrc:udpsrc0:
streaming task paused, reason not-negotiated (-4)
Execution ended after 246667089 ns.
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
/GstPipeline:pipeline0/GstDecodeBin:decodebin0.GstGhostPad:src0: caps = NULL
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/ffdec_h264:ffdec_h2640.GstPad:src:
caps = NULL
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/ffdec_h264:ffdec_h2640.GstPad:sink:
caps = NULL
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind.GstPad:src:
caps = NULL
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind.GstPad:sink:
caps = NULL
/GstPipeline:pipeline0/GstDecodeBin:decodebin0.GstGhostPad:sink: caps = NULL
/GstPipeline:pipeline0/GstRtpH264Depay:rtph264depay0.GstPad:src: caps = NULL
/GstPipeline:pipeline0/GstRtpH264Depay:rtph264depay0.GstPad:sink: caps =
NULL
/GstPipeline:pipeline0/GstUDPSrc:udpsrc0.GstPad:src: caps = NULL
Setting pipeline to NULL ...
Freeing pipeline ...

I have test the rtp example in the tree of
gst-plugin-good/tests/example/rtp, occur the same error.
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