Transloadit

What is a Robot Parameter?

A Robot Parameter configures the behavior of a Transloadit Robot, such as width for an image-resizing Step. Assembly Instructions also use common Step parameters such as use to connect the Step to its workflow inputs.

How Robot Parameters work

Robot Parameters form the operation-specific part of an Assembly Step’s Instructions. They select behaviors such as dimensions, formats, codecs, metadata handling, or destination settings. Available keys and value types are defined by the chosen Robot, while common keys such as use describe input selection and are shared by all Robots. Parameters are resolved when the Assembly runs and become part of its reproducible processing recipe.

Key facts

  1. Parameter names may recur across Robots without guaranteeing identical accepted values, defaults, or units; validation must use the documentation for the exact Robot.
  2. Omitting a parameter can invoke a Robot-defined default, which is observably different from sending an empty string, zero, false, or another explicit value.
  3. Template-backed Assemblies can centralize parameter sets, while request-time fields can supply controlled variations without duplicating the entire workflow graph.

When Robot Parameters matter

Set Robot-specific parameters to control the output of a processing step, and common step parameters to control how the step connects into the workflow. A parameter that is valid on one Robot may be unsupported or have different semantics on another.

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