QSO online 'Alert OVER IP' sYsTEM - AUDIO FREQUENCY to SPECTRUM readout with TEXT OVERLAY

[Chuck aa0hw]

USES GSTREAMER script for both the SENDER and RECEIVER SEND 4Khz, 12Khz OR 20Khz to RX OP

here is the example using 4Khz

gst-launch-1.0 -v audiotestsrc freq=4000 ! audioconvert ! opusenc ! rtpopuspay ! udpsink host=(ip address of the RX OP) port=9999

RECEIVE OP script: gst-launch-1.0 -v udpsrc port=9999 ! "application/x-rtp, media=(string)audio, clock-rate=(int)48000, encoding-name=(string)OPUS, sprop-maxcapturerate=(string)48000, sprop-stereo=(string)0, payload=(int)96, encoding-params=(string)2" ! rtpjitterbuffer ! rtpopusdepay ! opusdec ! audioconvert ! audioresample ! spectrascope ! textoverlay text=" QRT QRX QRV" valignment=top halignment=left font-desc="Sans, 24" ! ximagesink sync=false sync=false async=false

NOTE: the spacing between the TEXT QRT, QRX & QRV was dialed in by testing and running... for a 1920 horizontal monitor