Screensharing does not work if output monitor has `render_bit_depth 10` set

[skykanin]

Please fill out the following:

• Sway Version:

  • sway version 1.9

• Debug Log:

  • debug log

• Configuration File:

  • All that is required is setting render_bit_depth 10 for an output monitor. Here is my sway config as well.

• Stack Trace:

  • N/A (not a crash)

• Additional Info:

  • OS: NixOS 24.11.20240624.2893f56 (Vicuna) x86_64
  • GPU: AMD Radeon RX 7800 XT @ 0.06 GHz
  • pipewire version: 1.0.7
  • xdg-desktop-portal version: 1.18.4
  • xdg-desktop-portal-wlr version: 0.7.1
  • xdg-desktop-portal-gtk version: 1.15.1

• Description:

  • Configure an output monitor with render_bit_depth 10
  • Test screen sharing at https://mozilla.github.io/webrtc-landing/gum_test.html by clicking "Screen capture" and selecting the monitor configured with a render_bit_depth of 10.
  • I expect to see a preview of the screen on the website, but instead I see nothing. Changing the render_bit_depth to 8 resolves this issue (screenshots below)

  Expected:

Actual:

[emersion]

Probably an issue with Firefox no supporting high bit depth formats.

[skykanin]

Probably an issue with Firefox no supporting high bit depth formats.

I experience the same issue when screen sharing with vesktop (a discord client)