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Implementing a new option

Adding a new option to a feature is a great way to contribute to Remotion and enable more use cases.

Ways of specifying an option​

There are multiple ways to specify an option:

  • APIs that can be called via Node.JS can directly accept a parameter.
  • Options influencing a render can be added to the render dialog in the Remotion Studio.
  • If the action is available as a CLI command, the option should also be added as a CLI flag.
  • The config file can be also be used to specify multiple options.
    note

    The config file should not be read when executing a CLI command, otherwise it's values should be ignored.

Option Resolution​

The option should be resolved in the following order:

1 Directly passed to the Node.JS API
2 Specified via the render UI in the Remotion Studio
3 Specified via CLI flag
4 Specified via config file
5 Fallback to a default value

Naming​

The option should be named in camelCase for options in Node.JS and in hyphen-case for options accepted by the CLI.

Options accepting numerical values should include the unit in the name. For example durationInFrames instead of duration or timeoutInMilliseconds instead of timeout.

Documentation​

The option should be documented in the API reference and the CLI reference.

Note from which version the option is available.

Testing changes to the CLI​

Check out the Running the CLI section in the contributing docs.

Add CLI autocompletion​

In the cli-autocomplete package under src/source.ts, you can add new options. People who use Fig will then be able to get accurate autocompletion for your feature.

See also​