Gstreamer not playing videos in weston/wayland

[Abin P]

Hi I am trying t build a player in R car-E2 (arm based board).I already
build weston /wayland ,gststreamer-1.0 and waylandsink in R car-E2. I
checked all the plugins using gst-inspect-1.0.
Then i started to test video rendering as " gst-launch-1.0 videotestsrc !
waylandsink.
--I got plenty of errors like ERROR
:from element /Gstpipeline:pipeline0/GstvVideoTestSrc:videotestsrc0:
Internal data flow error
--Additional debug info:
gstreamer-1.4.1/libs/gst/base/gstbasesrc.c(2933):gst_base_src_loop():/GstVideoTestSrc:videotestsrc0:
streaming task paused, reason not negotiated (-4)
-- ERROR:pipeline doesn't want to preroll."
.Can anyone help me to solve this problem.I debugged with GST_DEBUG=4
gst-launch-1.0 videotestsrc ! waylandsink.

regards Abin
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