The Secure Reliable Transport (SRT) protocol is a new open source broadcast protocol, promoted by the SRT Alliance of which Clevercast is a member. It includes mechanisms for packet recovery while maintaining low latency between encoder and ingest server. It is therefore particularly suited for long-distance and high-quality broadcasting across unreliable and unpredictable networks like the public internet. Because of its reliability over long distances, we recommend it for broadcasts from outside of Europe.
Unlike RTMP, the SRT protocol has built-in mechanisms for authentication and encryption. SRT can also be used for single-language broadcasts, but the ability to add multiple (stereo) audio tracks to a single video broadcast makes it very suitable for multilingual live streaming.
The possible number of languages depends on your SRT encoder. Each stereo track can be used to send a language in stereo to Clevercast, or it can be used to send two languages in mono (L+R channels). This way, you can send at least two languages with every SRT encoder. Hardware encoders like Makito X support 16 languages in a very reliable fashion. Using vMix, you can send a single track consisting of 8 channels (for 8 languages, see below).
Note: before you start broadcasting, ensure that the status of your Clevercast event is set to Preview, Started or Paused. No SRT listener is active while the event status is Waiting or Ended, so your broadcast won’t be ingested.