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How-To Guides
  • API Usage
  • Artificially lower bandwidth or bitrate
  • Set up publishing or subscribing for only audio or only video
  • Set up High Availability
  • Optimal RTMP encoder settings
  • How do I find my stream key?
  • Preventing stream sharing
  • Display multiple copies of the same stream
  • Find the video dimension of the stream
  • Measure timing
  • Create test input
  • Verify encoder ability to contribute via UDP
  • Manage issues with installing Phenix SDKs
  • RTSP ingest from IP cameras
  • Work with timestamps in reports
  • How do I deal with corporate firewalls?
  • How do I record streams for VOD playback?
  • How do I set up ad insertion?
  • How do closed captions work in the Phenix system?
  • How do I set up and use SRT Ingest?
  • How do I set up and use RTMP Ingest?
  • How do I set up and use replay?

Closed Captions in the Phenix system

The Phenix Encoder extracts closed captions from video data found in MPEG transport streams (MPEG-TS) and sends them through the Phenix system as data messages. The data messages can be presented by the Phenix SDK on iOS and Android.

The JSON format allows the SDK to distinguish between different streams by examining the service ID (CC1 through CC4). Users of the SDK client can select any one of those streams at a time.

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