8000 Fix unmute bug in vlc_telnet by dmcc · Pull Request #48441 · home-assistant/core · GitHub
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Fix unmute bug in vlc_telnet #48441

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Mar 29, 2021
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Fix unmute bug in vlc_telnet #48441

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4 changes: 4 additions & 0 deletions homeassistant/components/vlc_telnet/media_player.py
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Original file line number Diff line number Diff line change
Expand Up @@ -249,6 +249,10 @@ def set_volume_level(self, volume):
self._vlc.set_volume(volume * MAX_VOLUME)
self._volume = volume

if self._muted and self._volume > 0:
# This can happen if we were muted and then see a volume_up.
self._muted = False
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Is there no feedback on mute state that we can get from vlc on update?

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Yeah, good question. I've looked at the output of VLCTelnet.status() and VLCTelnet.info(), but didn't find anything relevant. AFAICT, the VLC telnet protocol doesn't ever tell us if VLC is actually muted so this seems to be a deeper problem.

Seems we'd want to use https://pypi.org/project/python-vlc/ for this type of control.

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Ok, that library is using the c-bindings so is out of scope for this integration.

Instead of using a separate variable for muted I suggest we check if self._volume equals 0. The volume attribute is updated by the update method.

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Hm, not sure I understand. Would that check mean that if the user sets the volume to 0 in VLC, Home Assistant would detect VLC as muted? If so, what would the behavior be if the user clicks unmute in Home Assistant?

Incidentally, here's another possible direction: We remove SUPPORT_VOLUME_MUTE from vlc_telnet entirely (since VLC doesn't actually support this and we're essentially simulating mute...).

(and yes, switching to the CTypes lib would be a totally separate integration -- probably not worth it if the only benefit is adding mute support :))

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Good point. We probably wouldn't have added mute support today simulated like this, but removing it now is also a breaking change. We have some simulated features in the base media player class so we're a bit more flexible it seems for the media player. I'm ok with this fix.

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The vlc integration uses the c-bindings library.

https://www.home-assistant.io/integrations/vlc/

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Thanks Martin!

The vlc integration uses the c-bindings library.

Indeed! I'll have to revisit using that integration in my setup -- I forget why I settled on the telnet one of all things :)

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You need to have the vlc application installed on the same host as Home Assistant for that integration. I think that may be a major limitation for some users.


def media_play(self):
"""Send play command."""
self._vlc.play()
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