Web Speech API: Live Meeting & Recording Sync Demo

Demonstrates Example 2: During a live call, captions appear immediately on screen. Simultaneously, speechStartTime and speechEndTime are recorded so that the exported meeting recording features frame-accurate synchronized WebVTT captions upon playback.

Live Meeting (Real-Time) Standby

Live captions display immediately upon arrival (with a 3-second readability persistence window).

Recorded Meeting Playback Not Recorded

Play the recording to see native WebVTT captions synchronized to exact acoustic speech boundaries.

Recorded Meeting Transcript

Speaker	Transcript Text	speechStartTime	speechEndTime	Duration
Transcript will populate as you speak...