index.d.ts

import type { fabric as Fabric } from 'fabric';

/**
 * Edit and render videos.
 *
 * @param config - Config.
 */
declare function Editly(config: Editly.Config): Promise<void>;

declare namespace Editly {

	/** Little utility */
	type OptionalPromise<T> = Promise<T> | T;

	type OriginX =
		'left' |
		'center' |
		'right';

	type OriginY =
		'top' |
		'center' |
		'bottom';

	/**
	 * How to fit image to screen. Can be one of:
	 * - `'contain'` - All the video will be contained within the frame and letterboxed.
	 * - `'contain-blur'` - Like contain, but with a blurred copy as the letterbox.
	 * - `'cover'` - Video be cropped to cover the whole screen (aspect ratio preserved).
	 * - `'stretch'` - Video will be stretched to cover the whole screen (aspect ratio ignored).
	 *
	 * @default 'contain-blur'
	 * @see [Example 'image.json5']{@link https://github.com/mifi/editly/blob/master/examples/image.json5}
	 * @see [Example 'videos.json5']{@link https://github.com/mifi/editly/blob/master/examples/videos.json5}
	 */
	type ResizeMode =
		'contain' |
		'contain-blur' |
		'cover' |
		'stretch';

	/**
	 * An object, where `{ x: 0, y: 0 }` is the upper left corner of the screen and `{ x: 1, y: 1 }` is the lower right corner.
	 */
	interface PositionObject {

		/**
		 * X-position relative to video width.
		 */
		x: number;

		/**
		 * Y-position relative to video height.
		 */
		y: number;

		/**
		 * X-anchor position of the object.
		 */
		originX?: OriginX;

		/**
		 * Y-anchor position of the object.
		 */
		originY?: OriginY;

	}

	/**
	 * Certain layers support the position parameter.
	 *
	 * @see [Position parameter]{@link https://github.com/mifi/editly#position-parameter}
	 * @see [Example 'position.json5']{@link https://github.com/mifi/editly/blob/master/examples/position.json5}
	 */
	type Position =
		'top' |
		'top-left' |
		'top-right' |
		'center' |
		'center-left' |
		'center-right' |
		'bottom' |
		'bottom-left' |
		'bottom-right' |
		PositionObject;

	/**
	 * @see [Curve types]{@link https://trac.ffmpeg.org/wiki/AfadeCurves}
	 */
	type CurveType =
		'tri' |
		'qsin' |
		'hsin' |
		'esin' |
		'log' |
		'ipar' |
		'qua' |
		'cub' |
		'squ' |
		'cbr' |
		'par' |
		'exp' |
		'iqsin' |
		'ihsin' |
		'dese' |
		'desi' |
		'losi' |
		'nofade' |
		string;

	/**
	 * @see [Transition types]{@link https://github.com/mifi/editly#transition-types}
	 */
	type TransitionType =
		'directional-left' |
		'directional-right' |
		'directional-up' |
		'directional-down' |
		'random' |
		'dummy' |
		string;

	/**
	 * WARNING: Undocumented feature!
	 */
	type GLTextureLike = {
		bind: (unit: number) => number,
		shape: [number, number],
	};

	/**
	 * WARNING: Undocumented feature!
	 */
	interface TransitionParams {

		/**
		 * WARNING: Undocumented feature!
		 */
		[key: string]: number | boolean | GLTextureLike | number[];

	}

	interface Transition {

		/**
		 * Transition duration.
		 *
		 * @default 0.5
		 */
		duration?: number;

		/**
		 * Transition type.
		 *
		 * @default 'random'
		 * @see [Transition types]{@link https://github.com/mifi/editly#transition-types}
		 */
		name?: TransitionType;

		/**
		 * [Fade out curve]{@link https://trac.ffmpeg.org/wiki/AfadeCurves} in audio cross fades.
		 *
		 * @default 'tri'
		 */
		audioOutCurve?: CurveType;

		/**
		 * [Fade in curve]{@link https://trac.ffmpeg.org/wiki/AfadeCurves} in audio cross fades.
		 *
		 * @default 'tri'
		 */
		audioInCurve?: CurveType;

		/**
		 * WARNING: Undocumented feature!
		 */
		easing?: string | null;

		/**
		 * WARNING: Undocumented feature!
		 */
		params?: TransitionParams;

	}

	/**
	 * @see [Arbitrary audio tracks]{@link https://github.com/mifi/editly#arbitrary-audio-tracks}
	 */
	interface AudioTrack {

		/**
		 * File path for this track.
		 */
		path: string;

		/**
		 * Relative volume for this track.
		 *
		 * @default 1
		 */
		mixVolume?: number | string;

		/**
		 * Time value to cut source file from (in seconds).
		 *
		 * @default 0
		 */
		cutFrom?: number;

		/**
		 * Time value to cut source file to (in seconds).
		 */
		cutTo?: number;

		/**
		 * How many seconds into video to start this audio track.
		 *
		 * @default 0
		 */
		start?: number;

	}

	/**
	 * @see [Ken Burns parameters]{@link https://github.com/mifi/editly#ken-burns-parameters}
	 */
	interface KenBurns {

		/**
		 * Zoom direction for Ken Burns effect.
		 * Use `null` to disable.
		 */
		zoomDirection?: 'in' | 'out' | null;

		/**
		 * Zoom amount for Ken Burns effect.
		 *
		 * @default 0.1
		 */
		zoomAmount?: number;

	}

	type LayerType =
		'video' |
		'audio' |
		'detached-audio' |
		'image' |
		'image-overlay' |
		'title' |
		'subtitle' |
		'title-background' |
		'news-title' |
		'slide-in-text' |
		'fill-color' |
		'pause' |
		'radial-gradient' |
		'linear-gradient' |
		'rainbow-colors' |
		'canvas' |
		'fabric' |
		'gl' |
		'editly-banner';

	interface BaseLayer {

		/**
		 * Layer type.
		 */
		type: LayerType;

		/**
		 * What time into the clip should this layer start (in seconds).
		 */
		start?: number;

		/**
		 * What time into the clip should this layer stop (in seconds).
		 */
		stop?: number;

	}

	/**
	 * For video layers, if parent `clip.duration` is specified, the video will be slowed/sped-up to match `clip.duration`.
	 * If `cutFrom`/`cutTo` is set, the resulting segment (`cutTo`-`cutFrom`) will be slowed/sped-up to fit `clip.duration`.
	 * If the layer has audio, it will be kept (and mixed with other audio layers if present).
	 */
	interface VideoLayer extends BaseLayer {

		/**
		 * Layer type.
		 */
		type: 'video';

		/**
		 * Path to video file.
		 */
		path: string;

		/**
		 * How to fit video to screen.
		 *
		 * @default 'contain-blur'
		 * @see [Resize modes]{@link https://github.com/mifi/editly#resize-modes}
		 */
		resizeMode?: ResizeMode;

		/**
		 * Time value to cut from (in seconds).
		 *
		 * @default 0
		 */
		cutFrom?: number;

		/**
		 * Time value to cut to (in seconds).
		 * Defaults to *end of video*.
		 */
		cutTo?: number;

		/**
		 * Width relative to screen width.
		 * Must be between 0 and 1.
		 *
		 * @default 1
		 */
		width?: number;

		/**
		 * Height relative to screen height.
		 * Must be between 0 and 1.
		 *
		 * @default 1
		 */
		height?: number;

		/**
		 * X-position relative to screen width.
		 * Must be between 0 and 1.
		 *
		 * @default 0
		 */
		left?: number;

		/**
		 * Y-position relative to screen height.
		 * Must be between 0 and 1.
		 *
		 * @default 0
		 */
		top?: number;

		/**
		 * X-anchor.
		 *
		 * @default 'left'
		 */
		originX?: OriginX;

		/**
		 * Y-anchor.
		 *
		 * @default 'top'
		 */
		originY?: OriginY;

		/**
		 * Relative volume when mixing this video's audio track with others.
		 *
		 * @default 1
		 */
		mixVolume?: number | string;

	}

	/**
	 * Audio layers will be mixed together.
	 * If `cutFrom`/`cutTo` is set, the resulting segment (`cutTo`-`cutFrom`) will be slowed/sped-up to fit `clip.duration`.
	 * The slow down/speed-up operation is limited to values between `0.5x` and `100x`.
	 */
	interface AudioLayer extends BaseLayer {

		/**
		 * Layer type.
		 */
		type: 'audio';

		/**
		 * Path to audio file.
		 */
		path: string;

		/**
		 * Time value to cut from (in seconds).
		 *
		 * @default 0
		 */
		cutFrom?: number;

		/**
		 * Time value to cut to (in seconds).
		 * Defaults to `clip.duration`.
		 */
		cutTo?: number;

		/**
		 * Relative volume when mixing this audio track with others.
		 *
		 * @default 1
		 */
		mixVolume?: number | string;

	}

	/**
	 * This is a special case of `audioTracks` that makes it easier to start the audio relative to clips start times,
	 * without having to calculate global start times.
	 *
	 * This layer has the exact same properties as [`audioTracks`]{@link https://github.com/mifi/editly#arbitrary-audio-tracks},
	 * except `start` time is relative to the clip's start.
	 */
	interface DetachedAudioLayer extends BaseLayer, AudioTrack {

		/**
		 * Layer type.
		 */
		type: 'detached-audio';

	}

	/**
	 * Full screen image.
	 */
	interface ImageLayer extends BaseLayer, KenBurns {

		/**
		 * Layer type.
		 */
		type: 'image';

		/**
		 * Path to image file.
		 */
		path: string;

		/**
		 * How to fit image to screen.
		 */
		resizeMode?: ResizeMode;

		/**
		 * WARNING: Undocumented feature!
		 */
		duration?: number;

	}

	/**
	 * Image overlay with a custom position and size on the screen.
	 */
	interface ImageOverlayLayer extends BaseLayer, KenBurns {

		/**
		 * Layer type.
		 */
		type: 'image-overlay';

		/**
		 * Path to image file.
		 */
		path: string;

		/**
		 * Position.
		 */
		position?: Position;

		/**
		 * Width (from 0 to 1) where 1 is screen width.
		 */
		width?: number;

		/**
		 * Height (from 0 to 1) where 1 is screen height.
		 */
		height?: number;

	}

	interface TitleLayer extends BaseLayer, KenBurns {

		/**
		 * Layer type.
		 */
		type: 'title';

		/**
		 * Title text to show, keep it short.
		 */
		text: string;

		/**
		 * Text color.
		 * Defaults to '#ffffff'.
		 */
		textColor?: string;

		/**
		 * Set font (`.ttf`).
		 * Defaults to system font.
		 */
		fontPath?: string;

		/**
		 * Position.
		 */
		position?: Position;

	}

	interface SubtitleLayer extends BaseLayer {

		/**
		 * Layer type.
		 */
		type: 'subtitle';

		/**
		 * Subtitle text to show.
		 */
		text: string;

		/**
		 * Text color.
		 * Defaults to '#ffffff'.
		 */
		textColor?: string;

		/**
		 * Set font (`.ttf`).
		 * Defaults to system font.
		 */
		fontPath?: string;

		/**
		 * WARNING: Undocumented feature!
		 */
		backgroundColor?: string;

	}

	/**
	 * Title with background.
	 */
	interface TitleBackgroundLayer extends BaseLayer {

		/**
		 * Layer type.
		 */
		type: 'title-background';

		/**
		 * Title text to show, keep it short.
		 */
		text: string;

		/**
		 * Text color.
		 * Defaults to '#ffffff'.
		 */
		textColor?: string;

		/**
		 * Set font (`.ttf`).
		 * Defaults to system font.
		 */
		fontPath?: string;

		/**
		 * Background layer.
		 * Defaults to random background.
		 */
		background?: BackgroundLayer;

	}

	interface NewsTitleLayer extends BaseLayer {

		/**
		 * Layer type.
		 */
		type: 'news-title';

		/**
		 * Title text to show, keep it short.
		 */
		text: string;

		/**
		 * Text color.
		 * Defaults to '#ffffff'.
		 */
		textColor?: string;

		/**
		 * Set font (`.ttf`).
		 * Defaults to system font.
		 */
		fontPath?: string;

		/**
		 * Background color.
		 * Defaults to '#d02a42'.
		 */
		backgroundColor?: string;

		/**
		 * Position.
		 */
		position?: Position;

	}

	interface SlideInTextLayer extends BaseLayer {

		/**
		 * Layer type.
		 */
		type: 'slide-in-text';

		/**
		 * Title text to show, keep it short.
		 */
		text: string;

		/**
		 * Set font (`.ttf`).
		 * Defaults to system font.
		 */
		fontPath?: string;

		/**
		 * Font size.
		 */
		fontSize?: number;

		/**
		 * Char spacing.
		 */
		charSpacing?: number;

		/**
		 * Color.
		 */
		color?: string;

		/**
		 * Position.
		 */
		position?: Position;

	}

	interface FillColorLayer extends BaseLayer {

		/**
		 * Layer type.
		 */
		type: 'fill-color';

		/**
		 * Color to fill background.
		 * Defaults to random color.
		 */
		color?: string;

	}

	interface PauseLayer extends BaseLayer {

		/**
		 * Layer type.
		 */
		type: 'pause';

		/**
		 * Color to fill background.
		 * Defaults to random color.
		 */
		color?: string;

	}

	interface RadialGradientLayer extends BaseLayer {

		/**
		 * Layer type.
		 */
		type: 'radial-gradient';

		/**
		 * Array of two colors.
		 * Defaults to random colors.
		 */
		colors?: [ string, string ];

	}

	interface LinearGradientLayer extends BaseLayer {

		/**
		 * Layer type.
		 */
		type: 'linear-gradient';

		/**
		 * Array of two colors.
		 * Defaults to random colors.
		 */
		colors?: [ string, string ];

	}

	interface RainbowColorsLayer extends BaseLayer {

		/**
		 * Layer type.
		 */
		type: 'rainbow-colors';

	}

	type OnRenderCallback = (progress: number, canvas: Fabric.Canvas) => OptionalPromise<void>;
	type OnCloseCallback = () => OptionalPromise<void>;

	interface CustomFunctionCallbacks {
		onRender: OnRenderCallback;
		onClose?: OnCloseCallback;
	}

	interface CustomCanvasFunctionArgs {
		width: number;
		height: number;
		canvas: Fabric.Canvas;
	}

	type CustomCanvasFunction = (args: CustomCanvasFunctionArgs) => OptionalPromise<CustomFunctionCallbacks>;

	interface CanvasLayer extends BaseLayer {

		/**
		 * Layer type.
		 */
		type: 'canvas';

		/**
		 * Custom JavaScript function.
		 */
		func: CustomCanvasFunction;

	}

	interface CustomFabricFunctionArgs {
		width: number;
		height: number;
		fabric: typeof Fabric;
		canvas: Fabric.Canvas;
		params: any;
	}

	type CustomFabricFunction = (args: CustomFabricFunctionArgs) => OptionalPromise<CustomFunctionCallbacks>;

	interface FabricLayer extends BaseLayer {

		/**
		 * Layer type.
		 */
		type: 'fabric';

		/**
		 * Custom JavaScript function.
		 */
		func: CustomFabricFunction;

	}

	interface GlLayer extends BaseLayer {

		/**
		 * Layer type.
		 */
		type: 'gl';

		/**
		 * Fragment path (`.frag` file)
		 */
		fragmentPath: string;

		/**
		 * Vertex path (`.vert` file).
		 */
		vertexPath?: string;

		/**
		 * WARNING: Undocumented feature!
		 */
		speed?: number;

	}

	/**
	 * WARNING: Undocumented feature!
	 */
	interface EditlyBannerLayer extends BaseLayer {

		/**
		 * Layer type.
		 */
		type: 'editly-banner';

	}

	/**
	 * @see [Examples]{@link https://github.com/mifi/editly/tree/master/examples}
	 * @see [Example 'commonFeatures.json5']{@link https://github.com/mifi/editly/blob/master/examples/commonFeatures.json5}
	 */
	type Layer =
		VideoLayer |
		AudioLayer |
		DetachedAudioLayer |
		ImageLayer |
		ImageOverlayLayer |
		TitleLayer |
		SubtitleLayer |
		TitleBackgroundLayer |
		NewsTitleLayer |
		SlideInTextLayer |
		FillColorLayer |
		PauseLayer |
		RadialGradientLayer |
		LinearGradientLayer |
		RainbowColorsLayer |
		CanvasLayer |
		FabricLayer |
		GlLayer |
		EditlyBannerLayer;

	/**
	 * Special layers that can be used f.e. in the 'title-background' layer.
	 */
	type BackgroundLayer =
		RadialGradientLayer |
		LinearGradientLayer |
		FillColorLayer;

	interface Clip {

		/**
		 * List of layers within the current clip that will be overlaid in their natural order (final layer on top).
		 */
		layers: Layer[] | Layer;

		/**
		 * Clip duration.
		 * If unset, the clip duration will be that of the first video layer.
		 * Defaults to `defaults.duration`.
		 */
		duration?: number;

		/**
		 * Specify transition at the end of this clip.
		 * Defaults to `defaults.transition`.
		 * Set to `null` to disable transitions.
		 */
		transition?: Transition | null;

	}

	interface DefaultLayerOptions {

		/**
		 * Set default font (`.ttf`).
		 * Defaults to system font.
		 */
		fontPath?: string;

		/**
		 * Set any layer parameter that all layers will inherit.
		 */
		[key: string]: any;

	}

	type DefaultLayerTypeOptions = {

		/**
		 * Set any layer parameter that all layers of the same type (specified in key) will inherit.
		 */
		[P in LayerType]?: Partial<Omit<Extract<Layer, { type: P }>, 'type'>>;

	}

	interface DefaultTransitionOptions extends Transition {
	}

	interface DefaultOptions {

		/**
		 * Set default clip duration for clips that don't have an own duration (in seconds).
		 *
		 * @default 4
		 */
		duration?: number;

		/**
		 * An object describing the default layer options.
		 */
		layer?: DefaultLayerOptions;

		/**
		 * Defaults for each individual layer types.
		 */
		layerType?: DefaultLayerTypeOptions;

		/**
		 * An object describing the default transition.
		 * Set to `null` to disable transitions.
		 */
		transition?: DefaultTransitionOptions | null;

	}

	/**
	 * You can enable audio normalization of the final output audio.
	 * This is useful if you want to achieve Audio Ducking (e.g. automatically lower volume of all other tracks when voice-over speaks).
	 *
	 * @see [Dynaudnorm]{@link https://ffmpeg.org/ffmpeg-filters.html#dynaudnorm}
	 * @see [Example of audio ducking]{@link https://github.com/mifi/editly/blob/master/examples/audio2.json5}
	 */
	interface AudioNormalizationOptions {

		/**
		 * Enable audio normalization?
		 *
		 * @default false
		 * @see [Audio normalization]{@link https://github.com/mifi/editly#audio-normalization}
		 */
		enable?: boolean;

		/**
		 * Audio normalization gauss size.
		 *
		 * @default 5
		 * @see [Audio normalization]{@link https://github.com/mifi/editly#audio-normalization}
		 */
		gaussSize?: number;

		/**
		 * Audio normalization max gain.
		 *
		 * @default 30
		 * @see [Audio normalization]{@link https://github.com/mifi/editly#audio-normalization}
		 */
		maxGain?: number;

	}

	interface Config {

		/**
		 * Output path (`.mp4` or `.mkv`, can also be a `.gif`).
		 */
		outPath: string;

		/**
		 * List of clip objects that will be played in sequence.
		 * Each clip can have one or more layers.
		 *
		 * @default []
		 */
		clips: Clip[];

		/**
		 * Width which all media will be converted to.
		 *
		 * @default 640
		 */
		width?: number;

		/**
		 * Height which all media will be converted to.
		 * Decides height based on `width` and aspect ratio of the first video by default.
		 */
		height?: number;

		/**
		 * FPS which all videos will be converted to.
		 * Defaults to first video's FPS or `25`.
		 */
		fps?: number;

		/**
		 * Specify custom output codec/format arguments for ffmpeg.
		 * Automatically adds codec options (normally `h264`) by default.
		 *
		 * @see [Example]{@link https://github.com/mifi/editly/blob/master/examples/customOutputArgs.json5}
		 */
		customOutputArgs?: string[];

		/**
		 * Allow remote URLs as paths.
		 *
		 * @default false
		 */
		allowRemoteRequests?: boolean;

		/**
		 * Fast mode (low resolution and FPS, useful for getting a quick preview ⏩).
		 *
		 * @default false
		 */
		fast?: boolean;

		/**
		 * An object describing default options for clips and layers.
		 */
		defaults?: DefaultOptions;

		/**
		 * List of arbitrary audio tracks.
		 *
		 * @default []
		 * @see [Audio tracks]{@link https://github.com/mifi/editly#arbitrary-audio-tracks}
		 */
		audioTracks?: AudioTrack[];

		/**
		 * Set an audio track for the whole video..
		 *
		 * @see [Audio tracks]{@link https://github.com/mifi/editly#arbitrary-audio-tracks}
		 */
		audioFilePath?: string;

		/**
		 * Loop the audio track if it is shorter than video?
		 *
		 * @default false
		 */
		loopAudio?: boolean;

		/**
		 * Keep source audio from `clips`?
		 *
		 * @default false
		 */
		keepSourceAudio?: boolean;

		/**
		 * Volume of audio from `clips` relative to `audioTracks`.
		 *
		 * @default 1
		 * @see [Audio tracks]{@link https://github.com/mifi/editly#arbitrary-audio-tracks}
		 */
		clipsAudioVolume?: number | string;

		/**
		 * Adjust output [volume]{@link http://ffmpeg.org/ffmpeg-filters.html#volume} (final stage).
		 *
		 * @default 1
		 * @see [Example]{@link https://github.com/mifi/editly/blob/master/examples/audio-volume.json5}
		 * @example
		 * 0.5
		 * @example
		 * '10db'
		 */
		outputVolume?: number | string;

		/**
		 * Audio normalization.
		 */
		audioNorm?: AudioNormalizationOptions;

		/**
		 * WARNING: Undocumented feature!
		 */
		ffmpegPath?: string;

		/**
		 * WARNING: Undocumented feature!
		 */
		ffprobePath?: string;

		/**
		 * WARNING: Undocumented feature!
		 */
		enableFfmpegLog?: boolean;

		/**
		 * WARNING: Undocumented feature!
		 */
		verbose?: boolean;

		/**
		 * WARNING: Undocumented feature!
		 */
		logTimes?: boolean;

		/**
		 * WARNING: Undocumented feature!
		 */
		keepTmp?: boolean;

	}

	interface RenderSingleFrameConfig extends Config {

		/**
		 * Output path (`.mp4` or `.mkv`, can also be a `.gif`).
		 */
		outPath: string | undefined;

		/**
		 * Timestamp to render.
		 */
		time?: number;

	}

	/**
	 * WARNING: Undocumented feature!
	 * Pure function to get a frame at a certain time.
	 *
	 * @param config - Config.
	 */
	function renderSingleFrame(config: RenderSingleFrameConfig): Promise<void>;
}

export = Editly;