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Recording (Windows): end the audio track where the video ends #942
Description
Part of #920 (rank 26). Effort S, risk low.
Problem
- On Windows the audio track runs 0.44 to 0.58 s past the video, on three takes of 13 to 113 s (measured with
ffprobe). The gap is constant, so it is a tail, not drift. - At stop, the helper quiesces WGC and stops the microphone, loopback, device watcher, keep-alive and webcam, each within its own time budget, and only then stops the audio mixer (
main.cppstop sequence). The mixer is clock-driven, so it keeps writing chunks, silence included, for that whole half second.
Proposal
- Freeze the mixer at the instant the stop is requested (the pause path: it writes what the cushion holds up to that instant, then emits nothing more), so the audio ends where the video does.
Verify
- A real take:
ffprobe -show_entries stream=codec_type,durationreads audio and video within one audio chunk (10 ms) of each other.
Activity
github-actions commentedon Sep 30, 2026
Fixed by #946 and merged into
main.This change is assigned to the
Next Releaserelease milestone and is not necessarily available in the latest downloadable desktop release yet. It is currently marked asstatus: pending releaseuntil a packaged release containing it is published.EtienneLescot commentedon Sep 30, 2026
Moved into
v2.0.0as part of the pre-release cut.fix(windows): end the audio track where the video ends