dailz
51f6649159
Step 2a: eliminate cross-bench duplication identified by the Explore audit. Changes: - src/avhw/util.rs: av_err_to_string promoted pub(crate) -> pub (the only change to src/avhw/ in this whole refactor plan). - src/avhw/mod.rs: re-export av_err_to_string; #[allow(unused_imports)] silences rustc's per-bin unused-import false positive (the pub use is consumed by the bench bins, not by the main bin). - src/bin/common/mod.rs (new): shared receive_first_frame + drain_encoder. These were byte-identical between the two bench binaries modulo a type-path alias (ff::codec::encoder::video::Video vs ff::encoder::video::Video) and SAFETY-comment line wrapping. Both binaries now wire it via #[path = "common/mod.rs"] mod common;. - src/bin/vaapi_import_bench.rs: 1039 -> 947 LOC (av_err_to_string, receive_first_frame, drain_encoder all removed; 3 call sites updated). - src/bin/sw_encode_bench.rs: 614 -> 545 LOC (receive_first_frame, drain_encoder removed; 3 call sites updated). - use ffmpeg_next::packet::Mut moved to common/mod.rs (was needed only for pkt.as_mut_ptr() inside drain_encoder). Verification (all green): - cargo build --bins / cargo build --release - cargo test (79 lib + 3 integration = 82 pass, 1 ignored — unchanged) - cargo clippy --all-targets -- -D warnings - cargo fmt --check - Test counts unchanged from baseline
wl-webrtc
Wayland screen capture and encoding tool.
Prerequisites
- Rust toolchain (1.87+; MSRV pinned to match
u32::is_multiple_of/Option::is_none_orusage):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).