export declare function hasFfprobe(): boolean;
/**
 * Probe audio file duration using ffprobe.
 * Returns duration in milliseconds.
 */
export declare function probeAudioDuration(filePath: string): number;
export type OverflowSeverity = "ok" | "warning" | "critical";
export interface OverflowResult {
    overflowMs: number;
    severity: OverflowSeverity;
}
/**
 * Compute overflow of audio duration relative to scene window.
 * Positive overflowMs = audio is too long.
 * Negative overflowMs = audio fits with room to spare.
 *
 * Severity thresholds:
 * - ok: overflow <= 0
 * - warning: overflow > 0 but <= 2000ms OR <= 30% of window
 * - critical: overflow > 2000ms AND > 30% of window
 */
export declare function computeOverflow(audioDurationMs: number, sceneWindowMs: number): OverflowResult;
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