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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