Relays RTMP streams to multiple endpoints.

RTMP relay uses yaml-cpp submodule. The following command has to be run after cloning the RTMP relay:

$ git submodule update --init

To compile the RTMP relay, just run "make" in the root directory. You can pass these arguments to rtmp_relay (located in the bin directory):

• --config <config_file> – path to config file
• --daemon – run RTMP relay as daemon
• --kill-daemon – kill the daemon
• --reload-config – reload the daemon's configuration
• --help – print the documentation

Check out submodules the same way as for a normal build, then run docker-compose build. This will result in a local image named evo-rtmp-relay:latest.

RTMP relay configuration files are YAML-based. It must start with servers array. Each server has following attributes:

• endpoints – array of endpoint descriptors
  • applicationName – for host streams this is the filter of incoming stream application names (can contain a regex), for client streams this is the name of the application (optional)
  • streamName – for host streams this is the filter of incoming stream names (can contain a regex), for client streams this is the name of the stream (optional)
  • type – type of connection (client or host)
  • direction – direction of the stream (input or output)
  • addresses – list of addresses to connect to (for client connections) or listen to (for server connections)
  • video – flag that indicates whether to forward video stream (default value is true)
  • audio – flag that indicates whether to forward audio stream (default value is true)
  • data – flag that indicates whether to forward data stream (default value is true)
  • metaDataBlacklist – list of metadata fields that should not be forwarded
  • connectionTimeout – how long should the attempt to connect last (default value is 5.0)
  • reconnectInterval – the interval of reconnection (default value is 5.0)
  • reconnectCount – amount of connect attempts (0 to reconnect forever)
  • pingInterval – client ping interval in seconds (default value is 60.0)
  • bufferSize – size of the client buffer for input streams (default value is 3000)
  • amfVersion – AMF version (for client connections) to use for communication (default value is 0)

applicationName can have the following tokens:

• {id} – id of the application
• {applicationName} – name of the application
• {streamName} – name of the stream
• {ipAddress} – IP address of the destination
• {port} – destination port

streamName name can have the following tokens:

• {id} – id of the sender
• {applicationName} – name of the application
• {streamName} – name of the source stream
• {ipAddress} – IP address of the destination
• {port} – destination port

Optionally you can add a web status page with "statusPage" object, which has the following attribute:

• address – the address of the web status page

Status page can be accessed in the following addresses:

• <server address>/stats – HTML output
• <server address>/stats.html – HTML output
• <server address>/stats.json – JSON output
• <server address>/stats.txt – text output

To configure logging, you can add "log" object to the config file. It has the following attributes

• level – the log threshold level (0 for no logs and 4 for all logs)
• syslogEnabled – should the syslog be used (default value is true) (on *NIX only)
• syslogIdent – identification to be passed to openlog (on *NIX only)
• syslogFacility – facility to be passed to openlog (on *NIX only)

Example configuration:

log:
    level: 4
    syslogIdent: relay
    syslogFacility: "LOG_LOCAL3"
statusPage:
    address: "0.0.0.0:80"
servers:
  - endpoints:
      - addresses: [ "0.0.0.0:13004" ]
        type: "host"
        direction: "input"
        applicationName: "app/name"
        video: true
        audio: true
      - addresses: [ "52.19.130.93:1935" ]
        type: "client"
        direction: "output"
        applicationName: "app/name"
        streamName: "stream_name"
        video: true
        audio: true
        pingInterval: 60.0
      - addresses: [ "127.0.0.1:13005" ]
        type: "client"
        direction: "output"
        applicationName: "app/name"
        streamName: "{streamName}_2"
        video: true
        audio: true
        pingInterval: 60.0
        connectionTimeout: 5.0
        reconnectInterval: 5.0
        reconnectCount: 3