Add an audio source picker to the GUI so users can capture a specific
PipeWire device (sink monitor or microphone) instead of only the system
default output.
- vendor go2tv.app/screencast and patch the audio stream to accept a
target PipeWire node serial (PW_KEY_TARGET_OBJECT); the upstream lib
only ever auto-connected to the default
- capture: ListAudioSources enumerates PipeWire sinks/sources via pw-dump;
OpenPipeWire takes the selected node serial
- flinger/config/gui: AudioSource config field, persisted and exposed as
an Audio source dropdown (default output + enumerated devices)
Also fixes two pre-existing bugs surfaced by stop/start testing:
- engine Stop now waits for the video/audio/stats goroutines before
destroying the encoder (was a use-after-free SIGSEGV)
- Start/Stop now pause/resume the engine instead of tearing down and
re-opening the portal session, which the portal cannot reliably do
in-process (2nd CreateSession returned Ended/cancelled). Capture
session stays open across stop/start.
Capture the Wayland desktop via xdg-desktop-portal + PipeWire using
go2tv.app/screencast (MIT), and stream it to OBS:
- internal/capture: Capture/FrameSource/AudioSource interfaces and the
PipeWire backend (BGRA frames at monitor resolution, S16 48 kHz stereo
system audio)
- protocol: EncodeBGRA fast path producing 4:2:0 YCbCr JPEGs
- cmd: --source screen|pattern, --audio, --stream-index flags; real
capture feeds the existing sender
- share one wall-clock reference between the audio and video loops so
OBS receives aligned A/V timestamps (avoids multi-second latency)
Verified end-to-end: real desktop at 30 fps renders in OBS with
sub-second latency.
petere