Overview

    

    Closed Captioning is a crucial facet of Live Streams, and we have established a way for you to generate Closed Captions for Live Streams. We use a predictive, AI-backed service which takes your Live Stream's Audio and generates Captions in real-time.

    There are two "Captioning" services we provide: AI Closed Captions (real-time), and Transcriptions.

While both ultimately generate a VTT file for you to download, audit, etc., the key differences are as follows:

AI Closed Captions (AI CC)

  1. AI CC are for Live Streams only and cannot be applied/run after the media is recorded
  2. AI CC support "Vocabularies," a dictionary of terms you tell the AI service to interpret for better text recognition.
  3. The AI Engine injects the Closed Captions into the Stream compliant with the CEA-608 standard

Please refer to our Vocabularies documentation for more information on how those work:


[!TODO: Linke to VOCAB once published]

Event Transcriptions

  1. These can only be run after media is either Recorded or Uploaded to the Event
  2. These can be altered in plaintext and re-uploaded to the Event for making corrections

How to setup Real-time Closed Captions

In order to turn on AI Closed Captions for an Event, the following must be done:

  1. Create an Event
  2. In the Event's detailed view, go to the "General" tab
  3. Toggle the "AI Captioning" from Off to On
  4. Go live!

Note:

You must turn AI Captioning on prior to the Event going live

Dealing with Captions after a Stream is done

Once your Live Stream concludes, two things will happen: the Captions generated by the AI service will be duplicated as a VTT file and uploaded to your Event's Assets automatically.

However, we recognize that our Client's may also need to Edit (Trim, Stitch/Concatenate, rearranging, etc) their recorded media in our in-browser Video Editor. No matter what Edits you make on the Recorded Asset, the Captions will ripple with those changes. This occurs because the 608 Captions generated are interlinked with the Recorded file's timecodes.

Note:

If you concatenate further videos together, the Captions will only be retained where they are available. For instance, if you uploaded a Video to an Event which streamed with Live Captioning turned On, only the recorded Asset will have the Captions. In order to re-do the Captions at this point, you'd need to run a "Transcript" job.

Pricing

Our Pricing model for AI Closed Captioning is a "Pay as you go" model based upon Stream length:

  • $0.17c/min (or, $10.20/hr).

However, discounts are available based on expected volume.