/**
 * Thin ffmpeg/ffprobe wrappers. The agent never invokes ffmpeg directly —
 * tools call these functions, which gives us one place to audit args and
 * cancel running processes.
 */
export interface FfmpegResult {
    code: number;
    stdout: string;
    stderr: string;
}
export declare function checkFfmpeg(): boolean;
export declare function checkFfprobe(): boolean;
export declare function runFfmpeg(args: string[], opts?: {
    signal?: AbortSignal;
}): Promise<FfmpegResult>;
export interface MediaProbe {
    durationSec: number;
    width?: number;
    height?: number;
    frameRate?: number;
    videoCodec?: string;
    audioCodec?: string;
    audioChannels?: number;
    audioSampleRate?: number;
}
export declare function probeMedia(filePath: string): MediaProbe | null;
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