/**
 * Creates <code>Movie</code> object from a <code>ReadableByteChannel</code>.
 *
 * @param name                track name to identify later
 * @param readableByteChannel the box structure is read from this channel
 * @param randomAccessSource  the samples or read from this randomAccessSource
 * @return a representation of the movie
 * @throws IOException in case of I/O error during IsoFile creation
 */
public static Movie build(ReadableByteChannel readableByteChannel, RandomAccessSource randomAccessSource, String name) throws IOException {
    IsoFile isoFile = new IsoFile(readableByteChannel);
    Movie m = new Movie();
    List<TrackBox> trackBoxes = isoFile.getMovieBox().getBoxes(TrackBox.class);
    for (TrackBox trackBox : trackBoxes) {
        SchemeTypeBox schm = Path.getPath(trackBox, "mdia[0]/minf[0]/stbl[0]/stsd[0]/enc.[0]/sinf[0]/schm[0]");
        if (schm != null && (schm.getSchemeType().equals("cenc") || schm.getSchemeType().equals("cbc1"))) {
            m.addTrack(new CencMp4TrackImplImpl(
                    trackBox.getTrackHeaderBox().getTrackId(), isoFile,
                    randomAccessSource, name + "[" + trackBox.getTrackHeaderBox().getTrackId() + "]"));
        } else if (schm != null && (schm.getSchemeType().equals("piff"))) {
            m.addTrack(new PiffMp4TrackImpl(
                    trackBox.getTrackHeaderBox().getTrackId(), isoFile,
                    randomAccessSource, name + "[" + trackBox.getTrackHeaderBox().getTrackId() + "]"));
        } else {
            m.addTrack(new Mp4TrackImpl(
                    trackBox.getTrackHeaderBox().getTrackId(), isoFile,
                    randomAccessSource, name + "[" + trackBox.getTrackHeaderBox().getTrackId() + "]"));
        }
    }
    m.setMatrix(isoFile.getMovieBox().getMovieHeaderBox().getMatrix());
    return m;
}
 

public static void main(String[] args) throws IOException {
    IsoFile isoFile = new IsoFile("D:\\downloads\\cracked.s01e01.hdtv.x264-2hd.mp4");

    List<TrackBox> trackBoxes = Path.getPath(isoFile, "moov/trak/");
    long trackId = -1;
    TrackBox trackBox = null;
    for (TrackBox _trackBox : trackBoxes) {
        if (Path.getPath(_trackBox, "mdia/minf/stbl/stsd/avc1") != null) {
            trackId = _trackBox.getTrackHeaderBox().getTrackId();
            trackBox = _trackBox;
        }

    }

    Mp4SampleList sl = new Mp4SampleList(trackId, isoFile, new FileRandomAccessSourceImpl(
            new RandomAccessFile("D:\\downloads\\cracked.s01e01.hdtv.x264-2hd.mp4", "r")));


    FileChannel fc = new FileOutputStream("out.h264").getChannel();
    ByteBuffer separator = ByteBuffer.wrap(new byte[]{0, 0, 0, 1});

    fc.write((ByteBuffer) ((Buffer)separator).rewind());
    // Write SPS
    fc.write((
            ((AvcConfigurationBox) Path.getPath(trackBox, "mdia/minf/stbl/stsd/avc1/avcC")
            ).getSequenceParameterSets().get(0)));
    // Warning:
    // There might be more than one SPS (I've never seen that but it is possible)

    fc.write((ByteBuffer) ((Buffer)separator).rewind());
    // Write PPS
    fc.write((
            ((AvcConfigurationBox) Path.getPath(trackBox, "mdia/minf/stbl/stsd/avc1/avcC")
            ).getPictureParameterSets().get(0)));
    // Warning:
    // There might be more than one PPS (I've never seen that but it is possible)

    int lengthSize = ((AvcConfigurationBox) Path.getPath(trackBox, "mdia/minf/stbl/stsd/avc1/avcC")).getLengthSizeMinusOne() + 1;
    for (Sample sample : sl) {
        ByteBuffer bb = sample.asByteBuffer();
        while (bb.remaining() > 0) {
            int length = (int) IsoTypeReaderVariable.read(bb, lengthSize);
            fc.write((ByteBuffer) ((Buffer)separator).rewind());
            fc.write((ByteBuffer) ((Buffer)bb.slice()).limit(length));
            ((Buffer)bb).position(bb.position() + length);
        }


    }
    fc.close();

}