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fix: align native mixed audio timeline

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EtienneLescot
2026-05-05 16:49:07 +02:00
parent 588a0a7be8
commit 7929aea908
5 changed files with 283 additions and 63 deletions
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docs/engineering/windows-native-recorder-roadmap.md
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@@ -138,7 +138,7 @@ SSOT rules for this phase:
### 3. WASAPI Microphone
Status: initial implementation in progress. The helper can open the default WASAPI capture endpoint, apply the OpenScreen microphone gain, encode mic-only audio, and mix mic into system-loopback packets when both endpoints expose the same runtime format. Browser `deviceId` to MMDevice id mapping, resampling between mismatched endpoint formats, and drift correction remain follow-up hardening work.
Status: initial implementation in progress. The helper can open the default WASAPI capture endpoint, apply the OpenScreen microphone gain, encode mic-only audio, and mix system loopback plus microphone through a single queued `AudioMixer` timeline when both endpoints expose the same runtime format. Audio endpoints are warmed before WGC starts, the mixer drops pre-roll and begins its paced timeline on the first encoded video frame, then cuts queued tail audio on stop so the MP4 does not drift past the video. Browser `deviceId` to MMDevice id mapping, resampling between mismatched endpoint formats, and drift correction remain follow-up hardening work.
- Add microphone device enumeration and stable device-id mapping.
- Capture selected/default microphone through WASAPI.