remotion-dev/remotion · error · TypeError

outputRange tuples must contain at least 1 number

Error message

outputRange tuples must contain at least 1 number

What it means

Thrown by validateTupleOutputRange when the first tuple in outputRange has length 0. Each tuple must contribute at least one number to interpolate, so an empty tuple ([]) is rejected even though the array itself is non-empty.

Source

Thrown at packages/core/src/interpolate.ts:961

		}
	}

	const range = findRange(resolvedInput, inputRange);
	return resolvedInput >= inputRange[range + 1]
		? outputRange[range + 1]
		: outputRange[range];
};

const validateTupleOutputRange = (
	outputRange: readonly (readonly unknown[])[],
): number => {
	const dimensions = outputRange[0]?.length;
	if (dimensions === undefined) {
		throw new Error('outputRange must have at least 1 element');
	}

	if (dimensions === 0) {
		throw new TypeError('outputRange tuples must contain at least 1 number');
	}

	for (const output of outputRange) {
		if (output.length !== dimensions) {
			throw new TypeError(
				`outputRange tuples must all have the same length, but got ${dimensions} and ${output.length}`,
			);
		}

		for (const value of output) {
			if (typeof value !== 'number' || !Number.isFinite(value)) {
				throw new TypeError(
					`outputRange tuples must contain only finite numbers, but got [${output.join(
						',',
					)}]`,
				);
			}
		}

View on GitHub (pinned to 78fe4bb3fd)

Solutions

1. Give every tuple at least one number: [[0], [1]] or [[0,0], [1,1]].
2. Filter or assert non-empty tuples before calling interpolate().

Example fix

// before
interpolate(t, [0, 1], [[], []]);
// after
interpolate(t, [0, 1], [[0], [1]]);

if (!outputRange.every((t) => Array.isArray(t) && t.length > 0)) {
  throw new Error('Every tuple in outputRange must contain at least 1 number');
}

function isNonEmptyTuples(arr: readonly unknown[]): boolean {
  return arr.every((t) => Array.isArray(t) && t.length > 0);
}

When it happens

Trigger: interpolate(t, [0, 1], [[], []]) or any outputRange of empty arrays. Also reachable by spreading an array of arrays that contains an empty sub-array.

Common situations: Building tuple outputRange programmatically and producing an empty tuple for some keyframe; mapping a source array that yields zero-length results.

Related errors

• outputRange tuples must all have the same length, but got ${
• String outputRange values must contain 1 to 3 components, bu
• bezier x values must be in [0, 1] range
• invalid color string ${color} provided
• input can not be undefined

AI-assisted analysis of remotion-dev/remotion@78fe4bb3fd (2026-08-12). Data as JSON: /api/errors/ac37df2530e1de7e. Report an issue: GitHub.