/**
 * Audio Stitching Pipeline
 *
 * Precisely reassemble enhanced audio clips at original timestamps,
 * maintaining perfect synchronization with video timeline.
 */
export interface EnhancedTimeline {
    jobId: string;
    projectId: string;
    totalDuration: number;
    segments: EnhancedSegment[];
    silenceRegions: SilenceRegion[];
    assemblyInstructions: AssemblyInstructions;
}
export interface EnhancedSegment {
    id: string;
    startTime: number;
    endTime: number;
    originalDuration: number;
    enhancedDuration: number;
    audioUrl: string;
    status: "success" | "fallback" | "failed";
    qualityScore: number;
    text: string;
}
export interface SilenceRegion {
    startTime: number;
    endTime: number;
    type: "natural_pause" | "scene_transition" | "breathing";
}
export interface AssemblyInstructions {
    method: "timestamp_placement";
    crossFadeDurationMs: number;
    toleranceMs: number;
}
export interface StitchingOptions {
    outputPath: string;
    sampleRate?: number;
    channels?: number;
    format?: "wav" | "mp3" | "flac";
    qualityThreshold?: number;
}
export interface StitchingResult {
    success: boolean;
    outputPath: string;
    finalDuration: number;
    segmentsUsed: {
        enhanced: number;
        original: number;
        failed: number;
    };
    syncAccuracy: number;
    qualityMetrics: {
        avgQualityScore: number;
        maxDriftMs: number;
        totalArtifacts: number;
    };
    errors: string[];
}
/**
 * Main audio stitching function
 */
export declare function stitchEnhancedAudio(timeline: EnhancedTimeline, audioDir: string, options: StitchingOptions): Promise<StitchingResult>;
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