Coordinate with the downstream system - MediaLive

Coordinate with the downstream system

With an SRT output group, you can create more than one output, in order to deliver the same content to more than one downstream system.

You and the operator of each downstream system must discuss details about the output delivery. With this type of output group, MediaLive is the caller and the sender. The downstream system is the listener and the receiver.

  1. Decide if you need two destinations for the output:

    • If the MediaLive channel is a standard channel, you need two destinations.

    • If the MediaLive channel is a single-pipeline channel, you need one destination.

  2. Obtain the IP address and port for each destination. For example, srt://203.0.113.22:5000 and srt://203.0.113.88:5001.

    Note that if you are delivering to MediaConnect, you can obtain the addresses only after the MediaConnect operator creates the flows. See the last step in this procedure.

  3. MediaLive always encrypts the content, therefore you must agree about the following encryption details:

    • The encryption algorithm: AES 128, AES 192, or AES 256.

    • The passphrase that MediaLive and the downstream system will use to create the encryption and decryption keys. The passphrase can be 10 to 79 Unicode characters, which means that spaces are allowed.

  4. Discuss the following with the operator of the downstream system:

    • Tell the downstream system about the latency (in milliseconds) that you plan to configure into MediaLive for packet loss and recovery. Packet recovery is a key feature of SRT caller. The downstream destination should choose a latency value that is close to the value that you plan to use.

      You will configure the latency in each output, so each downstream system can have a different latency.

    • MediaLive works without a stream ID. But if you want to include one, or if the downstream system would like to use one, agree on the ID. Maximum 512 UTF-8 characters.

  5. If you are delivering to a MediaConnect flow, ask the MediaConnect operator to create their flow now.

    Ask the operator to give you the one or two addresses that are in the Inbound IP address field for that flow. These addresses are the destinations for the SRT output. For example, srt://203.0.113.22:5000 and srt://203.0.113.88:5001.