In a redundant streaming setup, what is the critical functionality a backup encoder must perform automatically during a failover?

In a redundant streaming setup, the critical functionality a backup encoder must perform automatically during a failover is to seamlessly take over the live stream from the primary encoder without significant interruption to the viewers. This means the backup encoder must automatically begin encoding and transmitting the identical video and audio content, using the exact same streaming settings (such as resolution, bitrate, and codec) and streaming endpoint (the URL where viewers are watching) as the primary encoder. This ensures that viewers experience a continuous stream with minimal buffering or disconnection. The failover process should be triggered automatically by a monitoring system that detects a failure in the primary encoder, such as a loss of signal or a system crash. The backup encoder must quickly assume the stream, typically within seconds, to maintain a positive viewing experience. It must also maintain synchronization with the primary feed to avoid noticeable jumps or glitches in the stream.