export declare const VIDEO_EXTENSIONS: string[];
/**
 * Check if a file is a supported video file based on extension only
 * Only accepts formats that are explicitly supported by the metadata extractor
 */
export declare const isVideoFile: (file: File) => boolean;
/**
 * Recursively scan a directory entry and extract all video files
 */
export declare const scanDirectory: (entry: FileSystemDirectoryEntry) => Promise<File[]>;
/**
 * Get File object from FileSystemFileEntry
 */
export declare const getFileFromEntry: (entry: FileSystemFileEntry) => Promise<File>;
/**
 * Process dropped items (files and directories)
 */
export declare const processDroppedItems: (items: DataTransferItemList) => Promise<File[]>;
/**
 * Process selected files from input element
 */
export declare const processSelectedFiles: (fileList: FileList) => File[];
/**
 * Format file size for display
 */
export declare const formatFileSize: (bytes: number) => string;
/**
 * Extract directory path from file for grouping
 */
export declare const getDirectoryPath: (file: File) => string;
/**
 * Group files by directory
 */
export declare const groupFilesByDirectory: (files: File[]) => Map<string, File[]>;
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