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Receive captions via a WebSocket connection

Receive captions via a WebSocket connection

Get access to captions via our API

Last updated on February 28, 2026

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This functionality is currently being rolled out and may not be available in your account yet

When a stream is running you can receive new captions via a WebSocket connection. This functionality is currently in beta.

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Workflow

  1. Create a new project with SRT or RTMP source
  1. Select the WebSocket API output
  1. Configure the maximum latency for your captions. A minimum of 5 seconds is recommended.
  1. Use our SDK to subscribe to new captions
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Use a modified HLS manifest from CaptionHub Brightcove: import a Brightcove Live project into Timbra