java多媒体文件编码处理工具类的示例分析

<dependency>
        <groupId>org.apache.storm</groupId>
        <artifactId>storm-core</artifactId>
        <version>1.1.0</version>
      </dependency>
      <dependency>
        <groupId>org.apache.storm</groupId>
        <artifactId>storm-kafka</artifactId>
        <version>1.0.4</version>
      </dependency>
 <dependency>
      <groupId>org.jcodec</groupId>
      <artifactId>jcodec</artifactId>
      <version>0.2.5</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>io.humble</groupId>
      <artifactId>humble-video-all</artifactId>
      <version>0.3.0</version>
    </dependency>
    <dependency>
      <groupId>org.mp4parser</groupId>
      <artifactId>isoparser</artifactId>
      <version>1.9.39</version>
    </dependency>

/***
   *https://stackoverflow.com/questions/38123693/how-to-concatenate-merge-two-videos-in-a-new-video-file-in-java
   * @param aggregate 合并待输出文件
   * @param segments MPEG transport stream(FFMpeg mpegts)、 MPEG-2 TS视频;波形声音
   * @throws InterruptedException
   * @throws IOException
   */
  private void merge(File aggregate, Collection<File> segments) throws InterruptedException, IOException {

    Muxer muxer = Muxer.make(aggregate.toString(), MuxerFormat.getFormat(96), "wav");

    final MediaPacket packet = MediaPacket.make();
    long dts_offset = 0;
    long pts_offset = 0;

    for (File segment : segments) {
      Demuxer demuxer = Demuxer.make();
      //option https://ffmpeg.org/ffmpeg-formats.html
      demuxer.open(segment.toString(), null, false, true, null, null);
      if (muxer.getState() == Muxer.State.STATE_INITED) {
        int numStreams = demuxer.getNumStreams();
        for (int s = 0; s < numStreams; s++) {
          DemuxerStream demuxerStream = demuxer.getStream(s);
          Decoder decoder = demuxerStream.getDecoder();
          muxer.addNewStream(decoder);
        }
        muxer.open(null, null);
      }
      long dts_max = 0;
      long pts_max = 0;
      while (demuxer.read(packet) >= 0) {
        if (packet.isComplete()) {
          packet.setDts(packet.getDts() + dts_offset);
          packet.setPts(packet.getPts() + pts_offset);
          dts_max = packet.getDts() + 1;
          pts_max = packet.getPts() + 1;

          muxer.write(packet, false);
        }
      }
      dts_offset = dts_max;
      pts_offset = pts_max;
      demuxer.close();
    }
    muxer.close();
  }

@Test
  public void testFormat()
  {
    MuxerFormat format = MuxerFormat.getFormat(128);
    System.out.println(format);
    Collection<MuxerFormat> formats = MuxerFormat.getFormats();
    formats.stream().forEach(this::out);
  }

  void out(MuxerFormat format)
  {
    System.out.printf("%s %s\n",format.getName(),format.getMimeType());
  }
  @Test
  public void test() throws IOException, InterruptedException {
    String directory = "C:\\Users\\Administrator\\AppData\\Local\\Temp\\8ad088a2-0bb3-41dc-89d9-2c57ef8414b0";
    List<File> files = Files.list(Paths.get(directory)).map(path -> path.toFile()).filter(file -> file.getName().endsWith(".ts"))
        .collect(Collectors.toList());
    File dest = new File(directory+"\\dest.wav");
    merge(dest,files);
  }