Nixpkgs: zoom-us can't change pulseaudio sinks

[lovesegfault]

Describe the bug
When I am in a Zoom conference call I cannot, using pavucontrol or pacmd change it's sink from my laptop's speakers to my headphones.

To Reproduce

1. Start Zoom and enter a meeting
2. Connect headphones
3. Attempt to set Zoom's sink using pavucontrol

Expected behavior
I'd expect to be able to move Zoom across sinks, like I can any other application (Firefox, for example, works fine.)

Metadata

 - system: `"x86_64-linux"`
 - host os: `Linux 5.5.2, NixOS, 20.03pre212208.8130f3c1c2b (Markhor)`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.3.2`
 - channels(root): `"nixos-20.03pre212208.8130f3c1c2b"`
 - channels(bemeurer): `"home-manager"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

Maintainer information:

# a list of nixpkgs attributes affected by the problem
attribute: zoom-us
# a list of nixos modules affected by the problem
module:

[worldofpeace]

@lovesegfault I've had this happen before office hours once (basically panic), it seems there's settings inside zoom to change it that work. The view Settings -> Audio .

[lovesegfault]

Oh, If I set it to System Default then it seems to just obey PulseAudio!

[worldofpeace]

Hmm, I see Same as system(maybe that's different in another version).
I don't understand why that's not a default.

[lovesegfault]

Yeah, definitely bizarre behavior to override system defaults wrt. audio outputs

[mkg20001]

I think this is basically "works as intended" since you can specify the input/output in the app and then it tries to keep it that way per it's code

Edit: Meaning the code does what it should do and it's out of scope for nixpkgs

[mkg20001]

The view Settings -> Audio .

The arrows next to the microphone/speaker in the meeting view should reveal the same settings

[lovesegfault]

Alright, closing this issue since I was just me not knowing how to use computers. Thanks for the help everyone!

[katsar0v]

I still cannot change sinks in pulseaudio. Any idea why? I want to put a monitor on other device

[romildo]

I am also having this issue.

[mkg20001]

It seems to be application code releated AFAIK since it changes it back by itself... so "works as intended"?

[knarrff]

I think this is basically "works as intended" since you can specify the input/output in the app and then it tries to keep it that way per it's code

I don't see it that way. The in-app settings should not be the only place where users can change the PA settings.

Also, if set to 'as system', this uses the system-default, which isn't necessarily the device you want for Zoom, and also that cannot be changed in pavucontrol, so at the moment, the only way to change the device is in Zoom itself, which is contrary to most other applications and limits the control people have over their system.