C21 Support Center

General

Technical Docs

• C21 Live Editor Shortcuts
• Akamai DASH Ingest
• Akamai DASH Ingest
• Akamai Stream Packaging
• Akamai HLS Ingest

Videos

• C21 Live Cloud -- C21 Live Encoder Session
• C21 Live Cloud -- C21 Live Editor Session
• C21 Live Cloud -- Navigation
• C21 Live Cloud -- C21 Live Mosaic Session

Live Streaming Operations

Redundancy and Network Resilience

• Troubleshoot packet loss and intermittent streaming disruptions
• Configure failover to a backup origin

Encoder and Signal Troubleshooting

• Fix recording and audio playback issues
• Resolve audio issues on live channels
• Resolve audio-video synchronization issues

Stream Stability and Connectivity

• Resolve encoder-to-origin connectivity issues
• Resolve live channel interruptions and timeouts

Licensing, Access, and Administration

Platform Monitoring and Health

• Configure monitoring alerts for live stream failures
• Resolve live encoder interruptions and timeouts
• Monitor stream health and detect failures early

Access and User Management

• Create a new user with support access

License Activation and Renewal

• Activate or reactivate your Cires21 license after hardware changes
• Request a Cires21 license for your server

Subtitles and Captioning

MediaCopilot Caption Workflows

• Configure MediaCopilot transcription language and subtitle export
• Fix long subtitles in video playback
• Export MediaCopilot transcription results as subtitles or captions

Subtitle Publishing and Alignment

• Fix geolocation discrepancies and subtitle delays

Subtitle Playback Issues

• Resolve duplicated subtitles on HLS channels