Live closed captions

FastPix Live now supports automatic closed captions during a broadcast. Set the new closedCaptions flag when you create a live stream and FastPix will generate live captions in the playback manifest, ready to be rendered by any caption-aware player.

Captions are produced server-side from the live audio track, so there is no extra encoder configuration on the broadcaster’s side. The flag is persisted on the live stream record, so you can detect caption-enabled streams from your application and adjust the player UI accordingly.

What is included:

• New closedCaptions boolean parameter on the create live stream request.
• The closedCaptions value is returned alongside other stream metadata on the live stream object.
• Caption SKU support in billing so usage is metered correctly when the feature is enabled at the workspace level.

Limitations to be aware of:

• Live captions are available only during the live broadcast. They are not carried into the live-to-VOD asset generated from the recording.
• Closed captions are not delivered to simulcast targets — only the primary FastPix playback manifest carries the live caption track.

Live captions are a key requirement for accessibility, education, corporate events, and any audience watching with sound off — and they now ship as a first-class part of the live stream API.