I like Centova, but in this case there are other panels that have 6 seconds of delay and arrives until 45 seconds

Is there a way to improve this?

Sorry for my English but in the Spanish forum they have not responded since last year

Try the Liquidsoap Source, it is much better.

The delay doesnt have anything to do with Centova but rather the server equipment, and your latency between the broadcast source. The delay should be minimal, however it is not as if Centova is injecting delay time into your stream.