import { Filter, FilterStreamRef } from '../../../Filter';
import { Stream } from '../../../Compiler';
/**
  * 9.4 flite
  * Synthesize a voice utterance using the libflite library.
  *
  * To enable compilation of this filter you need to configure FFmpeg with
  * --enable-libflite.
  *
  * Note that versions of the flite library prior to 2.0 are not thread-safe.
  *
  * The filter accepts the following options:
  */
export declare class AudioFlite extends Filter<AudioFliteParameters> {
    outputs: FilterStreamRef<AudioFliteParameters, AudioFlite>[];
    constructor(inputs?: Stream | Stream[], parameters?: AudioFliteParameters);
}
export interface AudioFliteParameters {
    /** If set to 1, list the names of the available voices and exit immediately. Default value is 0. */
    list_voices?: string | number;
    /**
      * Set the maximum number of samples per frame. Default value is 512.
      * @aliases n
      */
    nb_samples?: string | number;
    /**
      * Set the maximum number of samples per frame. Default value is 512.
      * @aliasof nb_samples
      */
    n?: string | number;
    /** Set the filename containing the text to speak. */
    textfile?: string | number;
    /** Set the text to speak. */
    text?: string | number;
    /**
      * Set the voice to use for the speech synthesis. Default value is
      * kal. See also the list_voices option.
      * @aliases v
      */
    voice?: string | number;
    /**
      * Set the voice to use for the speech synthesis. Default value is
      * kal. See also the list_voices option.
      * @aliasof voice
      */
    v?: string | number;
    [key: string]: string | number;
}
/**
  * 9.4 flite
  * Synthesize a voice utterance using the libflite library.
  *
  * To enable compilation of this filter you need to configure FFmpeg with
  * --enable-libflite.
  *
  * Note that versions of the flite library prior to 2.0 are not thread-safe.
  *
  * The filter accepts the following options:
  */
export declare function audioFlite(inputs?: Stream | Stream[], parameters?: AudioFliteParameters): AudioFlite;