Output Browser Stream

1 VersionOutput

Publishes a variadic mix of Image, VideoFrame, and AudioFrame inputs as separate live WebRTC tracks to browser subscribers, with optional wall-clock pacing, so an analytics backend can show a real-time preview in a browser tab.

How it fits

Typical backends

An analytics overlay drawn by visualize is streamed live to the browser for a real-time monitoring view.

A vision track and a synthesised speech track are combined into one browser session as separate WebRTC tracks.

Caveats

CompatibilityBrowsers require HTTPS for WebRTC in production; only localhost is exempt for development.
Parameter interactionreal_time keeps the preview live and drops frames under back-pressure, while disabling it plays a pre-recorded source at native rate for smooth playback; reset_live_mode_ms snaps the player back to live after a gap when positive and is off at the default.
Hard constraintEvery input on a multi-track stream must be consumed; an unconsumed video or audio input back-pressures the others.
CostEach connected browser client is encoded independently, so concurrent viewers multiply CPU and GPU load.
I/O contractImage inputs are converted to YUV I420 internally with the source colour space detected automatically.

Versions

0afc91aflatestdefault
Automated release
7/16/2026