export interface PresetTarget {
    format(fmt: string): PresetTarget;
    flvmeta(): PresetTarget;
    size(s: string): PresetTarget;
    fps(rate: number): PresetTarget;
    videoBitrate(rate: string): PresetTarget;
    videoCodec(codec: string): PresetTarget;
    audioBitrate(rate: string): PresetTarget;
    audioCodec(codec: string): PresetTarget;
    audioChannels(channels: number): PresetTarget;
    audioFrequency(freq: number): PresetTarget;
    outputOptions(opts: string[]): PresetTarget;
}
export type PresetLoader = (ffmpeg: PresetTarget) => void;
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