import org.jcodec.containers.mp4.muxer.FramesMP4MuxerTrack; //导入依赖的package包/类
public void remux(File tgt, File src, File timecode, Handler handler) throws IOException {
    SeekableByteChannel input = null;
    SeekableByteChannel output = null;
    SeekableByteChannel tci = null;
    try {
        input = readableFileChannel(src);
        output = writableFileChannel(tgt);
        MP4Demuxer demuxer = new MP4Demuxer(input);

        
        TimecodeMP4DemuxerTrack tt = null;
        if (timecode != null) {
            tci = readableFileChannel(src);
            MP4Demuxer tcd = new MP4Demuxer(tci);
            tt = tcd.getTimecodeTrack();
        }

        MP4Muxer muxer = WebOptimizedMP4Muxer.withOldHeader(output, Brand.MOV, demuxer.getMovie());

        List<AbstractMP4DemuxerTrack> at = demuxer.getAudioTracks();
        List<PCMMP4MuxerTrack> audioTracks = new ArrayList<PCMMP4MuxerTrack>();
        for (AbstractMP4DemuxerTrack demuxerTrack : at) {
            PCMMP4MuxerTrack att = muxer.addPCMAudioTrack(((AudioSampleEntry) demuxerTrack
                    .getSampleEntries()[0]).getFormat());
            audioTracks.add(att);
            att.setEdits(demuxerTrack.getEdits());
            att.setName(demuxerTrack.getName());
        }

        AbstractMP4DemuxerTrack vt = demuxer.getVideoTrack();
        FramesMP4MuxerTrack video = muxer.addTrack(VIDEO, (int) vt.getTimescale());
        // vt.open(input);
        video.setTimecode(muxer.addTimecodeTrack((int) vt.getTimescale()));
        copyEdits(vt, video, new Rational((int)vt.getTimescale(), demuxer.getMovie().getTimescale()));
        video.addSampleEntries(vt.getSampleEntries());
        MP4Packet pkt = null;
        while ((pkt = (MP4Packet)vt.nextFrame()) != null) {
            if (tt != null)
                pkt = tt.getTimecode(pkt);
            pkt = processFrame(pkt);
            video.addFrame(pkt);

            for (int i = 0; i < at.size(); i++) {
                AudioSampleEntry ase = (AudioSampleEntry) at.get(i).getSampleEntries()[0];
                int frames = (int) (ase.getSampleRate() * pkt.getDuration() / vt.getTimescale());
                MP4Packet apkt = (MP4Packet)at.get(i).nextFrame();
                audioTracks.get(i).addSamples(apkt.getData());
            }
        }

        MovieBox movie = muxer.finalizeHeader();
        if (handler != null)
            handler.handle(movie);
        muxer.storeHeader(movie);

    } finally {
        NIOUtils.closeQuietly(input);
        NIOUtils.closeQuietly(output);
        NIOUtils.closeQuietly(tci);
    }
}