Introduction to live captions

CaptionHub Live uses AI to transcribe, translate, and publish captions directly into video players, fully synchronised with stream audio.

Supporting 48 source languages and simultaneous translation into 130 languages, it features termbases, custom dictionaries, formality settings, and full control over visibility.

CaptionHub Live uses the HLS output of a video stream. Using HLS’s built-in buffer, it produces captions just in time for the end user.

High level diagram of CaptionHub live. Click to view the full version.

We support streams from major providers like Brightcove, AWS MediaPackage and Mux.

To display captions to your viewers, we support plugins for Brightcove player, Video.js and THEOplayer. You can also integrate captions into the HLS stream or receive the captions via our API.