NDI-native live captioning

Real-time captions & translation, keyed straight onto the venue screen.

SCAPTION transcribes and translates live speech and outputs it as an NDI source with true alpha transparency — no chroma-key step, no consumer captioning app. An operator Co-Pilot lets you fix any word before it reaches the audience.

Start free trial — 60 min, no card See pricing

True alpha over NDI

Output a real alpha-channel NDI source that keys directly onto LED walls, switchers, and vMix — with a chroma-key HDMI fallback when there's no NDI gear.

Operator Co-Pilot

A live, editable transcript. Low-confidence words are flagged so you can correct them before they hit the big screen. Editing never stalls the feed.

Built for the booth

Dark, vMix-like console. Pick any WDM audio source, set a source→target language pair, style captions to the venue's brand, and export the full transcript afterward.

Metered, not trusted

Usage is measured server-side as audio is relayed — trial minutes and plan hours can't be bypassed by tampering with the app.

Pre-flight safety

SCAPTION warns when Windows' Public network profile would hide your NDI source, and always shows its own name + ip:port for manual entry in vMix.

Never cut off mid-event

Hitting a plan limit warns and auto-bills overage — it never interrupts a live session. A dropped connection fades the audience output to transparent, never an error.

Try it in your real rig

The free trial is full-featured with no watermark — 60 minutes to validate reliability before you pay.

Start free trial