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]"

  • -filter_complex "[0:a]showvolume[vol];[0:v][vol]overlay[v]" -map [v] -map 0:a

  • ffplay -f lavfi "amovie=mr_money_mustache.mp4 , asplit [a][out1]; [a] showvolume=f=0.15:b=4:w=100:h=10 [out0]"