dailz
86a8b61b07
Oracle P2 batch 2 (refactor items). Drops both remaining design-shape
clippy warnings to zero without behavior change.
- avhw.rs build_filter_graph: drop unused _enc_width/_enc_height params
(Oracle caught them during P2 review — passed by EncState::new but
never read inside the function; the filter graph uses width/height
only). Signature: 8 args -> 6 args (under clippy's 7 threshold).
- state.rs InFlightSurface::CopyQueued: Box the drm_map field.
AVDRMFrameDescriptor is ~592 bytes (4 objects + 4 layers); the enum
size was being dominated by this variant, ballooning every
InFlightSurface value to 592 bytes even for the None/AllocQueued
variants. Box<AVDRMFrameDescriptor> shrinks the enum to ~32 bytes
regardless of variant. The drm_map field is currently destructured
under _drm_map (unused), so the boxing has no consumer-side impact.
- state_portal.rs webrtc_thread_loop: 10 args -> 4 args via two new
structs:
* WebRtcThreadConfig { fps, enc_width, enc_height, max_bitrate }
— immutable for the thread's lifetime; a tier change spawns a
new thread rather than mutating.
* WebRtcThreadChannels { webrtc_rx, sent_gap_tx, bitrate_tx,
resolution_tx } — channel endpoints owned exclusively by the
sender thread after spawn.
wrtc (WebRtcState) and paused (Arc<AtomicBool>) stay as separate
args because they have different ownership semantics (moved-in
state vs shared atomic). Documented as doc comments on the new
types so the next reader understands the bundle rationale.
All 79 unit tests + 3 integration tests pass. clippy: 0 errors.
Per-file warning counts: state_portal.rs down from 3 to 0; state.rs
down from 8 to 4 (remaining are unrelated dead-code on OutputInfo /
starting_timestamp).
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
# WebRTC streaming mode (HTTP signaling server)
wl-webrtc --port 8080 -v
# Force a fresh portal authorization dialog (ignore saved restore token)
wl-webrtc --output output.mp4 --no-persist
# Pin the capture backend instead of auto-detecting
wl-webrtc --output output.mp4 --backend portal # or: --backend screencopy
CLI Arguments
src/args.rsis the authoritative source. Runwl-webrtc --helpfor the live list.
| Argument | Default | Description |
|---|---|---|
-o, --output |
(optional) | Output file path (e.g. output.mp4). Optional when using --port for WebRTC mode. |
--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 |
--max-bitrate |
8000000 | Max bitrate cap for WebRTC mode (caps BWE escalation; no effect in MP4 mode) |
--gop-size |
auto | Group of Pictures size |
-v, --verbose |
false | Enable verbose logging |
--backend |
auto | Capture backend: screencopy (wlroots) or portal (KWin/KDE). Auto-detected if omitted. |
--port |
0 | WebRTC HTTP signaling server port. 0 keeps MP4 file output mode. |
--no-persist |
false | Force re-authorization (ignore saved portal restore token) |
--stats |
false | Print per-second pipeline statistics for stutter diagnosis |
Capture backends
The tool supports two Wayland capture backends, auto-detected by default:
- wlr-screencopy (preferred when
zwlr_screencopy_manager_v1is advertised): works on wlroots-based compositors (Sway, Hyprland, etc.). - XDG Portal / PipeWire (fallback when D-Bus ScreenCast is available):
works on KWin/KDE and any compositor that implements the XDG Desktop Portal
screen-cast protocol. The first run shows an authorization dialog; a restore
token is cached under
wl-webrtc/portal-restore-tokenso subsequent runs don't re-prompt (use--no-persistto force a fresh authorization).