export type MediaTrackConstraints = {
    width?: ConstrainNumber;
    height?: ConstrainNumber;
    frameRate?: ConstrainNumber;
    facingMode?: ConstrainString;
    deviceId?: ConstrainString;
    groupId?: ConstrainString;
}

type ConstrainNumber = number | {
    exact?: number,
    ideal?: number,
    max?: number,
    min?: number,
}

type ConstrainString = string | {
    exact?: string,
    ideal?: string,
}