Monitoring & silence detection

Comments: 9

• 19 Apr, '19
  Buster Neece Admin Merged

  https://github.com/AzuraCast/AzuraCast/issues/525
  https://github.com/AzuraCast/AzuraCast/issues/1358
  
  It might be good practice to add a silence detection mechanism for incoming live streams. When the incoming stream is not disconnected and broadcasting silence, the station stays silent.
  
  This can easily be implemented with Liquidsoap, but you might want to make the silence threshold and duration configurable in the UI. See example below:
  
  ```
  # Switch to fallback if live source is silen

• 20 Apr, '19
  Buster Neece Admin Merged

  We previously added silence detection automatically for all streams, but we received a number of reports that the silence detection was either not working correctly and causing erroneous fading, or that Liquidsoap was using an unexpectedly high amount of CPU.
  
  If we are able to bring it back, it will likely be as an opt-in only option, so that users can weigh the possible downsides when choosing to enable it.

• 07 Nov, '19
  Marvin Merged

  This feature would be great!

• 21 Jan, '20
  Loh Boon Keat Merged

  For me, if this feature been implement, it will be grate. The sound when changing the song from 1 to another is more better. I like that feature.

• 21 Feb, '20
  Buster Neece Admin

  "Detect silence ("dead air") in incoming streams." (suggested by Buster Neece on 2019-04-19), including upvotes (19) and comments (1), was merged into this suggestion.

• 18 Jul, '20
  Speedy Charly Merged

  Agreed - having no silence removal actually renders the crossroad feature null and void...

• 22 Sep, '20
  Buster Neece Admin

  "Remove silence from start and end of song" (suggested by dreinn on 2019-05-25), including upvotes (29) and comments (3), was merged into this suggestion.

• 18 Feb
  Moonbase59

  In the studios, I still use a [modified version of SilentJack](https://github.com/Moonbase59/silentjack), together with some DBUS and MQTT magic to signal a buzzer and a flashing light in the studio tower. Having a silence detection on the actual server would be a great addition!

• 31 Jul
  pitsch

  monitoring a stream is often a visual thing "does it show a busy signal"?
  would be great for the now playing feature to provide some kind of (optional) peak meter,
  https://esonderegger.github.io/web-audio-peak-meter/examples/audio.html
  or, LED 5 min status: green-all fine, red-clipped, black-dead air.
  
  dead air protection is inbuild in liquidsoap - certainly best selectively used for incoming livestreams, dj accounts.
  https://liquidsoap.readthedocs.io/en/latest/content/blank.html
  
  make sure the material itself does not contain silence. non-destructively with Libmp3splt.
  cli: https://blog.dornea.nu/2012/04/01/howto-split-mp3s-by-silence-detection-using-mp3splt/
  for trimming manually via a webbrowser there are some free scripts/services available, untested.
  
  set up a container to run microservice to monitor
  https://github.com/mairlist/streammonitor
  
  had this run at a transmitter location once:
  https://pira.cz/show.asp?art=silence