/**
 * fMP4 Muxer — Generate fragmented MP4 segments from encoded H.264 chunks.
 *
 * Produces:
 * - Init segment: ftyp + moov (with avc1/avcC sample entry)
 * - Media segments: moof + mdat (with trun sample table)
 */
export interface MuxerInitConfig {
    width: number;
    height: number;
    timescale: number;
    avcC: Uint8Array;
}
export interface MuxerSample {
    data: Uint8Array;
    duration: number;
    isKeyframe: boolean;
    compositionTimeOffset?: number;
}
export declare class FMP4Muxer {
    private _sequenceNumber;
    /**
     * Generate an init segment (ftyp + moov) for H.264 fMP4.
     */
    generateInit(config: MuxerInitConfig): Uint8Array;
    /**
     * Generate a media segment (moof + mdat) from encoded samples.
     */
    muxSegment(samples: MuxerSample[], baseDecodeTime: number): Uint8Array;
}
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