migrate from kmsgrab

[ReenigneArcher]

Is there an existing issue for this?

• I have searched the existing issues

Is your issue described in the documentation?

• I have read the documentation

Is your issue present in the latest beta/pre-release?

This issue is present in the latest pre-release

Describe the Bug

kmsgrab is deprecated/unsupported

Expected Behavior

No response

Additional Context

• HDR Streaming Very Dark After Plasma 6.2 Update #3298 (comment)
• Can't stream a headless monitor created with Hyprland #2955 (comment)
• KMS + Headless + Nvidia: Unknown Monitor connector type [Meta] #2250 (comment)

Host Operating System

Linux

Operating System Version

Architecture

other, n/a

Sunshine commit or version

Package

other (not listed)

GPU Type

n/a

GPU Model

GPU Driver/Mesa Version

Capture Method

KMX (Linux)

Config

No response

Apps

No response

Relevant log output

*

[Zamundaaa]

FWIW one issue you'll come across with this is that the screencast portal doesn't support HDR streaming yet. I'd be happy to help out with fixing that on the KWin side though

[Quackdoc]

I believe there are two primary options for this

• Pipewire capture support + portals
• The new wayland protocols https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/124

the wayland protocol is an alternative to wlr-screencapture and has PRs for both cosmic and wlroots. https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4545 pop-os/cosmic-comp#365

I would love to see both supported. Pipewire + xdg portals gives a good basis, but on my custom streaming machines, I like to keep them as minimal as possible and to that point would like to avoid installing pipewire+portals all together.

[ReenigneArcher]

The first option has an open PR here: #2507

Not sure what's left before that's ready to merge, but right now there are merge conflicts.