appsrc not functioning

[O'neill, Gerry]

Hi,
I am trying to test transmission of a video test stream using appsink and appsrc without success.
I have used a tee in the appsink pipeline for debugging. Because the appsink pipeline displays
the videotestsrc by using the tee, I presume that the appsrc pipeline is the problem.

Appsink pipeline:
gst-launch -v videotestsrc ! video/x-raw-yuv, format =\(fourcc\)I420, framerate=\(fraction\)25/1, width=640, height=480 ! ffmpegcolorspace ! tee name=myT ! queue ! appsink name=video_test \
myT. ! queue ! xvimagesink

Appsrc pipeline:
gst-launch -v appsrc name=video_test ! video/x-raw-yuv,format =\(fourcc\)I420, framerate=\(fraction\)25/1, width=640, height=480 ! ffmpegcolorspace ! queue ! xvimagesink

I have tried in vain to get this to work.
Any help or advise in this will be greatly appreciated.

Ger.

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