Bug: Input Mute actions fail to execute

[Snikerop]

Software information: StreamController 1.5.0-beta.12 (flatpak). OBSPlugin 1.0.1

When attempting to use a button with an Input Mute action (Toggle and Set both replicate this), the action fails and all subsequent key actions are never triggered.

The following log output includes information about adding the action, then using it. This is done with toggle, but the same occurs for set.

2025-12-26 14:33:38.817 | INFO     | src.backend.PluginManager.ActionCore:__init__:88 - Loaded action Input Mute - Toggle with id com_core447_OBSPlugin::ToggleInputMute
2025-12-26 14:33:38.821 | DEBUG    | src.backend.PageManagement.Page:load:80 - Loaded page Audio in 0.00 seconds
2025-12-26 14:33:38.826 | DEBUG    | src.backend.PageManagement.Page:load:80 - Loaded page Audio in 0.00 seconds
2025-12-26 14:33:40.075 | ERROR    | threading:run:1012 - An error has been caught in function 'run', process 'MainProcess' (3), thread 'own_actions_event_callback' (140270427412160):
Traceback (most recent call last):

  File "/home/snikerop/.var/app/com.core447.StreamController/data/plugins/com_core447_OBSPlugin/actions/InputMute/InputMuteBase.py", line 165, in on_key_down
    self.assert_valid_state_for_update()
    │    └ <function InputMuteBase.assert_valid_state_for_update at 0x7f93689aeca0>
    └ <actions.InputMute.ToggleInputMute.ToggleInputMute object at 0x7f935bf8be00>

  File "/home/snikerop/.var/app/com.core447.StreamController/data/plugins/com_core447_OBSPlugin/actions/InputMute/InputMuteBase.py", line 159, in assert_valid_state_for_update
    raise InputNotFoundError()
          └ <class 'actions.InputMute.InputMuteBase.InputNotFoundError'>

actions.InputMute.InputMuteBase.InputNotFoundError

In testing, I find the same error regardless of whether OBS or StreamController was initialized first. Similar set/toggle actions (like Scene Item) work without issue. Reinstalling both StreamController and OBSPlugin has not fixed the issue, nor has restarting my computer.

[ImDevinC]

The error indicated there means the input cannot be found in OBS. What type of input are you trying to mute? I just tested and was not able to reproduce the error

[Snikerop]

After some more testing on my end, it seems the problem comes from Audio Input Capture (PipeWire) sources from the linux-pipewire-audio plugin. Using PulseAudio sources works as expected.

The issue is not with the PipeWire plugin as a whole, as other PipeWire sources from the same plugin are able to be muted without issue.

Seeing as the problem is likely an issue with the source plugin, I will mark as closed.