Monitoring

Needs to be fleshed out further.

##Various

• It might be useful to have a list of udp stream links for the boxes in a html page. These can either be hand copied or using the vlc plugin, opened directly in vlc from firefox using the vlc plugin. See http://tldp.org/REF/VLC-User-Guide/x1574.html or https://forum.videolan.org/viewtopic.php?t=130560 for an example (to be tested!).
• There was some grafana work done by ddvtech... Do we have anything recyclable?
• audio level monitoring

  • ffmpeg -nostats -i input.mp3 -filter_complex ebur128 -f null -

  • ffplay -f lavfi -i "amovie=input.mp3,ebur128=video=1:meter=18 [out0][out1]"