Regardless of how you plan to insert real-time closed captioning to live video using one of the workflows mentioned in this article, the channel needs to be configured the proper way. There are 4 options for the channel, visible under the channel preview player CC tab:
"I don't use closed captioning".
"Closed captioning is in the video".
"Add manual closed captioning to the video".
"Add automated closed captioning to the video".
The selection of either option will change the RTMP path you need to copy to an RTMP encoder. The image below shows where to find these settings.
Caption Options Explained
"I don't use closed captioning" - means you don't use closed captioning and no further changes are needed.
"Closed captioning is in the video" - check this box when closed captioning is already inserted into the video. If you have a hardware closed captioning decoder (for example decoders by Evertz, EEG, etc), a stenograph operator sends captions data to the device, captions are embedded in the SDI video and go out to a media encoder. Check this box.
"Add manual closed captioning to the video" - check this box when a remote stenograph operator listens to your broadcast and creates closed captioning that is sent to Videolinq separately from the video, Videolinq receives the video from your encoder and the captions from the stenograph operator (via 3rd party partners).
"Add automated closed captioning to the video" - check this box to add AI-based automated closed captioning to live streams originating from virtual meetings, RTMP encoders, another stream, or recorded files. The service includes a real-time Editor to correct mistakes and improve the accuracy of the captions before they are inserted into the live stream.
Checkbox selections affect the Encoder RTMP path. The default is option 1 ("I don't use closed captioning"). After making a closed captions selection, copy the RTMP path and stream key to your RTMP encoder as shown in the image below.
IMPORTANT: Always start the channel before adding closed captioning. To add closed captioning, the channel must be active with video.