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The hitless failover configuration involves grouping two inputs in a "Failover Group". If the two inputs are identical (i.e. two or more binary-identical streams with synchronized RTP headers), when one of them The failover group includes the following configuration options for the merging of binary-identical steams:
The merging of the streams can be achieved using one of the following methods:
- RTP headers (SMPTE 2022-7) – if the sources are RTP and the RTP headers were maintained, Zixi will use the SMPTE 2022-7 to compare and merge the two streams in order to allow hitless failover. This option is the most recommended as it will use the sequence and the timestamp in the packets to compare which packets are missing. This method is more accurate than methods that compare the entire payload or methods that use sophisticated DNA sequencing algorithm, which are more error prone, as the payload may have multiple matches.
- RTP headers or TS content – if the sources do not have RTP headers, Zixi will try to merge using the MPEG-TS content itself.
In these cases, when one of the streams is disrupted or interrupted completely, Zixi Broadcaster will seamlessly use the packets of the other input without any disruptions.
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If the streams are not identical, the failover process will not be seamless and may take up to a second. |
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