observing ~400kbit/s bandwidth consumption whereas mic and camera are disabled

How to use GitHub

• Please use the 👍 reaction to show that you are affected by the same issue.
• Please don't comment if you have no relevant information to add. It's just extra noise for everyone subscribed to this issue.
• Subscribe to receive notifications on status change and new comments.

Steps to reproduce

first scenario:

• when I click the join call button, the device/media modal loads
• my webcam LED lights on (no matter if camera is enabled or not. If it is enabled and that I disable it, webcam LED stays on)
• shortly after I actually join the call, if my camera is disabled, my webcam LED switches off
• in that case, I observe a sent stream around 400kbit/s, despite having disabled mic and camera

other scenario:

• when I click the join call button, the device/media modal loads
• my webcam LED lights on (no matter if camera is enabled or not. If it is enabled and that I disable it, webcam LED stays on)
• instead of simply disabling the webcam, I go into the device section, and set the camera and mic device to none. The webcam LED instantly switches off.
• I join the call.
• the sent stream is nearly 0kbit/s, with a spike > 100kbit/s every 30s

I continued experimentations, and to summarize:

conclusion of this is:

• having camera enabled sends a cheaper stream than having camera disabled
• there is no way to lower the stream rate but to completely deactivate the camera and mic devices

Expected behaviour

• having camera and mic set but disabled should send a close to zero stream rate

Actual behaviour

Tell us what happens instead

Talk app

c.nc.c

Browser

Firefox 124.0.1
Fedora Linux 39 (Workstation Edition)

Browser log

Server configuration

Operating system: Ubuntu/RedHat/...

Web server: Apache/Nginx

Database: MySQL/Maria/SQLite/PostgreSQL

PHP version: 8.0/8.1/8.2

Nextcloud Version: (see admin page)

List of activated apps:

If you have access to your command line run e.g.:
sudo -u www-data php occ app:list
from within your server installation folder

Nextcloud configuration:

If you have access to your command line run e.g.:
sudo -u www-data php occ config:list system
from within your Nextcloud installation folder

Server log (data/nextcloud.log)

Insert your server log here

No source file or test is identified in the issue. Start by reproducing both device-selection scenarios in Firefox 124.0.1 on Fedora Linux 39 and compare sent bandwidth with camera and microphone set but disabled; done means the stream is close to zero without fully deactivating those devices.