d7fbb5256c
Add a second capture backend for compositors without wlr-screencopy (KWin, GNOME, etc.) using the xdg-desktop-portal ScreenCast interface and PipeWire DMA-BUF streaming. New files: - src/backend_detect.rs: auto-detect wlr-screencopy vs portal backend - src/cap_portal.rs: Portal session setup + PipeWire DMA-BUF thread - src/state_portal.rs: StatePortal encoder pipeline (DMA-BUF → VAAPI) Changes: - Cargo.toml: add ashpd 0.13, tokio 1, pipewire 0.9, libspa 0.9, crossbeam-channel 0.5 - src/args.rs: add --backend CLI flag - src/avhw.rs: extract create_encoder() from inline State code - src/main.rs: route to portal or wlr-screencopy based on backend - src/state.rs: fix params.destroy() on dup failure, cleanup in_flight_surface on copy fail, use create_encoder() - tests/integration_test.rs: add --backend flag tests
wl-webrtc
Wayland screen capture and encoding tool.
Prerequisites
- Rust toolchain (1.70+):
rustup default stable - FFmpeg 6.0+ dev libraries with VAAPI support:
- Arch:
pacman -S ffmpeg - Ubuntu/Debian:
apt install libavcodec-dev libavformat-dev libavutil-dev libswscale-dev libva-dev - Fedora:
dnf install ffmpeg-devel libva-devel
- Arch:
- Wayland dev libraries:
- Arch:
pacman -S wayland-protocols - Ubuntu/Debian:
apt install libwayland-dev wayland-protocols - Fedora:
dnf install wayland-devel wayland-protocols-devel
- Arch:
- DRM dev libraries:
- Arch:
pacman -S libdrm - Ubuntu/Debian:
apt install libdrm-dev - Fedora:
dnf install libdrm-devel
- Arch:
Build
cargo build --release
Run
# Basic capture to file
wl-webrtc --output output.mp4
# With custom FPS and bitrate
wl-webrtc --output output.mp4 --fps 60 --bitrate 8000000
# Specify DRM device for hardware encoding
wl-webrtc --output output.mp4 --drm-device /dev/dri/renderD128
# Verbose mode
wl-webrtc --output output.mp4 -v
CLI Arguments
| Argument | Default | Description |
|---|---|---|
-o, --output |
(required) | Output file path (e.g., output.mp4) |
--output-name |
auto | Wayland output name to capture |
--fps |
30 | Target frames per second |
--codec |
h264 | Video codec (h264 only for MVP) |
--hw-accel |
vaapi | Hardware acceleration method |
--drm-device |
auto | DRM render device path |
--bitrate |
auto | Target bitrate in bps |
--gop-size |
auto | Group of Pictures size |
-v, --verbose |
false | Enable verbose logging |
--port |
0 | WebTransport server port (unused in MVP) |