title: demuxer video use jcodec
body: <p>I want to hide the text on video (in java). I created video from images, and I got a video lossless format. Now, I want to get frame from this video. How can I do it?. This is code that I used:</p>
  
  <pre><code>public class SequenceMuxer {
  private SeekableByteChannel ch;
  private MuxerTrack outTrack;
  private int frameNo;
  private MP4Muxer muxer;
  private Size size;
  
  public SequenceMuxer(File out) throws IOException {
      this.ch = NIOUtils.writableChannel(out);
  
      // Muxer that will store the encoded frames
      muxer = MP4Muxer.createMP4Muxer(ch, Brand.MP4);
  
  }
  
  public void encodeImage(File png) throws IOException {
      if (size == null) {
          BufferedImage read = ImageIO.read(png);
          size = new Size(read.getWidth(), read.getHeight());
          // Add video track to muxer
          outTrack = muxer.addVideoTrack(Codec.PNG, VideoCodecMeta.createSimpleVideoCodecMeta(size, ColorSpace.RGB));
      }
      // Add packet to video track
      outTrack.addFrame(MP4Packet.createMP4Packet(NIOUtils.fetchFromFile(png), frameNo, 25, 1, frameNo, FrameType.KEY, null,
              frameNo, frameNo, 0));
  
      frameNo++;
  }
  
  public void finish() throws IOException {
      // Write MP4 header and finalize recording
      muxer.finish();
      NIOUtils.closeQuietly(ch);
  }
  </code></pre>
  
  <p>}</p>