Custom presentations

This page describes how to create your own custom effect for <TransitionSeries>.

Concept

A presentation is a higher order component which wraps around the entering slide as well as the exiting slide and which implements an effect based on three parameters:

1

The current presentationProgress, influenced by the timing of the transition

2

The presentationDirection, either entering or exiting

3

The presentationDurationInFrames (available from v4.0.153)

4

Additional developer-defined passedProps

Boilerplate

A custom presentation is a function which returns an object of type TransitionPresentation.
It is an object with a React component (component) and React props which are passed to the component as passedProps.

import type {TransitionPresentation} from '@remotion/transitions';

type CustomPresentationProps = {
  width: number;
  height: number;
};

export const customPresentation = (
  props: CustomPresentationProps,
): TransitionPresentation<CustomPresentationProps> => {
  return {component: StarPresentation, props};
};

The component is a React component which receives the following props:

1

children: The markup to wrap around

2

presentationDirection: Either "entering" or "exiting"

3

presentationProgress: A number between 0 and 1 which represents the progress of the transition.

4

passedProps: The custom props passed to the presentation

import type {TransitionPresentationComponentProps} from '@remotion/transitions';
import {AbsoluteFill} from 'remotion';

const StarPresentation: React.FC<
  TransitionPresentationComponentProps<CustomPresentationProps>
> = ({children, presentationDirection, presentationProgress, passedProps}) => {
  return (
    <AbsoluteFill>
      <AbsoluteFill>{children}</AbsoluteFill>
    </AbsoluteFill>
  );
};

Example

The following example implements a star mask transition:

1

Based on the passedProps height and width , the inner radius of the star is calculated that will completely fill the canvas.

2

Using @remotion/shapes, an SVG path is calculated, and grown from zero to the full size of the canvas.

3

The presentationProgress is used to interpolate the shape size.

4

@remotion/paths is used to center the star in the middle of the canvas.

5

A clipPath is used to clip the entering slide. Inside the container, the children get rendered.

6

The effect is disabled if presentationDirection is set to "exiting"

import {getBoundingBox, translatePath} from '@remotion/paths';
import {makeStar} from '@remotion/shapes';
import type {TransitionPresentationComponentProps} from '@remotion/transitions';
import React, {useMemo, useState} from 'react';
import {AbsoluteFill, random} from 'remotion';

export type CustomPresentationProps = {
  width: number;
  height: number;
};

const StarPresentation: React.FC<
  TransitionPresentationComponentProps<CustomPresentationProps>
> = ({children, presentationDirection, presentationProgress, passedProps}) => {
  const finishedRadius =
    Math.sqrt(passedProps.width ** 2 + passedProps.height ** 2) / 2;
  const innerRadius = finishedRadius * presentationProgress;
  const outerRadius = finishedRadius * 2 * presentationProgress;

  const {path} = makeStar({
    innerRadius,
    outerRadius,
    points: 5,
  });

  const boundingBox = getBoundingBox(path);

  const translatedPath = translatePath(
    path,
    passedProps.width / 2 - boundingBox.width / 2,
    passedProps.height / 2 - boundingBox.height / 2,
  );

  const [clipId] = useState(() => String(random(null)));

  const style: React.CSSProperties = useMemo(() => {
    return {
      width: '100%',
      height: '100%',
      clipPath:
        presentationDirection === 'exiting' ? undefined : `url(#${clipId})`,
    };
  }, [clipId, presentationDirection]);

  return (
    <AbsoluteFill>
      <AbsoluteFill style={style}>{children}</AbsoluteFill>
      {presentationDirection === 'exiting' ? null : (
        <AbsoluteFill>
          <svg>
            <defs>
              <clipPath id={clipId}>
                <path d={translatedPath} fill="black" />
              </clipPath>
            </defs>
          </svg>
        </AbsoluteFill>
      )}
    </AbsoluteFill>
  );
};

Example usage:

export const MyComp: React.FC = () => {
  const {width, height} = useVideoConfig();

  return (
    <TransitionSeries>
      <TransitionSeries.Sequence durationInFrames={70}>
        <Letter color="orange">A</Letter>
      </TransitionSeries.Sequence>
      <TransitionSeries.Transition
        presentation={customPresentation({width, height})}
        timing={springTiming({
          durationInFrames: 45,
          config: {
            damping: 200,
          },
          durationRestThreshold: 0.0001,
        })}
      />
      <TransitionSeries.Sequence durationInFrames={60}>
        <Letter color="pink">B</Letter>
      </TransitionSeries.Sequence>
    </TransitionSeries>
  );
};

References

See the source code for already implemented presentations for a useful reference.

See also

• Custom timings