/**
 * Optimize an AVIF byte stream by re-muxing the container. Returns the
 * smaller of the original and the re-muxed output.
 *
 * On any parse/serialize failure, the original input is returned unchanged.
 */
export declare function optimize(input: Uint8Array, options?: OptimizeOptions): Uint8Array;
/**
 * Same as `optimize()` but also returns a stats object describing what was
 * dropped — useful for UIs that want to show the user `−15 % (Exif + thumbnail)`.
 */
export declare function optimizeWithStats(input: Uint8Array, options?: OptimizeOptions): OptimizeResult;
/**
 * Force re-muxing without the smaller-of-two guard. Always returns a fresh
 * buffer; callers that want to keep the original on bloat should use
 * `optimize()` instead.
 */
export declare function remux(input: Uint8Array, options?: OptimizeOptions): Uint8Array;
export declare interface OptimizeOptions {
  preserveMetadata?: boolean
}
/** Per-call summary of what the optimizer touched. */
export declare interface OptimizeStats {
  passthrough: boolean
  keptItemIds: number[]
  droppedItemIds: number[]
  droppedItemTypes: string[]
  bytesSaved: number
  reason?: string
}
export declare interface OptimizeResult {
  bytes: Uint8Array
  stats: OptimizeStats
}