(host)
rpizero> raspivid -t 0 -h 720 -w 1280 -vf -fps 30 -b 2000000 -o - | gst-launch-1.0 -v fdsrc ! h264parse ! rtph264pay config-interval=1 pt=96 ! gdppay ! tcpserversink host=rpizero port=5000

(client)
orangepi> gst-launch-1.0 -v tcpclientsrc host=rpizero port=5000  ! gdpdepay ! rtph264depay ! h264parse ! vaapidecode ! vaapisink

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(client)
orangepi> [??? ffmpeg pipe to stdout ???] | mpv -