Video (SDP) will only play if it is started after gstreamer sink or VLC is started

[gotsring]

Just a guess, try setting config-interval=1 in rtph264pay. This periodically
sends the SPS and PPS info to the clients.

GStreamer broadcast from the test board:
gst-launch-1.0 -e videotestsrc ! video/x-raw, width=640, height=480,
framerate =30/1 ! \
omxh264enc ! rtph264pay config-interval=1 ! udpsink host=10.0.0.2 port=5500





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