export interface TranscriptSegment {
    text: string;
    duration: number;
    offset: number;
    videoId?: string;
}
export interface ResearchSourceMetadata {
    videoId: string;
    title: string;
    videoUrl: string;
    channelId: string | null;
    channelName: string | null;
    channelUrl: string | null;
    thumbnailUrl: string | null;
}
export interface ResearchTranscript {
    fullTranscript: TranscriptSegment[];
    transcript: TranscriptSegment[];
    source: ResearchSourceMetadata;
}
export interface TimeRange {
    start?: number;
    end?: number;
}
export interface SearchOptions {
    query: string;
    caseSensitive?: boolean;
    contextLines?: number;
    matchMode?: 'substring' | 'word';
}
export interface TranscriptOptions {
    language?: string;
    timeRange?: TimeRange;
    search?: SearchOptions;
    segment?: {
        method: 'equal' | 'smart';
        count: number;
    };
    format?: 'raw' | 'timestamped' | 'merged';
    includeMetadata?: boolean;
}
export interface TranscriptSummaryOptions {
    summaryLength?: 'short' | 'medium' | 'detailed';
    includeKeywords?: boolean;
    includeTimestamps?: boolean;
    segmentSummaries?: boolean;
}
export interface VideoMetadata {
    id?: string | null;
    title?: string | null;
    channelId?: string | null;
    channelTitle?: string | null;
    publishedAt?: string | null;
    duration?: string | null;
    viewCount?: string | null;
    likeCount?: string | null;
}
export interface FormattedTranscript {
    segments: TranscriptSegment[];
    totalSegments: number;
    duration: number;
    format: string;
    text?: string;
    metadata?: Array<VideoMetadata | null>;
}
export declare class TranscriptError extends Error {
    videoId: string;
    options: TranscriptOptions;
    originalError: Error;
    constructor(params: {
        message: string;
        videoId: string;
        options: TranscriptOptions;
        originalError: Error;
    });
}