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Webcam is upside down when pipewire is running.

  • PipeWire version (pipewire --version): 1.0.7.
  • Distribution and distribution version (PRETTY_NAME from /etc/os-release): Ubuntu Oracular Oriole (development branch).
  • Desktop Environment: Sway Wayland Compositor.
  • Kernel version (uname -r): 6.8.0-31-generic

Description of Problem:

My laptop's webcam is always upside down though I use LD_PRELOAD=LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libv4l/v4l2convert.so <webcam app> to flip it vertically. I use cheese and snapshot app for webcam. When I disable or stop pipewire, the webcam behave normally (can be flipped) using LD_PRELOAD library.

How Reproducible:

I try it only on my laptop but I also try it on other distribution like Slackware, Archlinux. All give the same behaviour.

Steps to Reproduce:

  1. Open webcam app (cheese) using LD_PRELOAD=LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libv4l/v4l2convert.so
  2. Cheese is running and it's upside down.
  3. Disable / stop pipewire service and relaunch cheese with LD_PRELOAD.
  4. Cheese is running and it's not upside down / normal.

Actual Results:

Webcam is upside down.

Expected Results:

Webcam isn't upside down and can be flipped without stoping pipewire.

Additional Info (as attachments):