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• How to generate m3u8 from a list of files in ffmpeg ?

  5 février 2018, par Blurry Script

  Let’s say I have this list of files :
  audios :

  file1.mp3 //audiotrack 1
  
  file2.mp3 //audiotrack 2
  
  file3.mp3 //audiotrack 3

  subtitles :

  file1.vtt //subtitle 1
  
  file2.vtt //subtitle 2
  
  file3.vtt //subtitle 3

  videos :

  file1_320x280.mp4 //video quality 1
  
  file2_640x11024.mp4 //video quality 2
  
  file3_1200x1600.mp4 //video quality 3

  how to convert with FFMPEG all this files to .TS fragments with a m3u8 file ?

  also will the video.js HLS extension allow the user to choose the quality ?

• Java Xuggler Metadata List of Chapters MP4/M4V Video

  27 juin 2017, par MrSax

  I’m trying to use Xuggler like FFMPEG Metadata Wrapper (I just need the list of Chapters of MP4/M4V Video).

  So far I have not been able to find a solution.
  Can anyone help me ?

  I was only able to get the following information :

      final String filename = "...path...";
  
      IContainer container = IContainer.make();
  
      int result = container.open(filename, IContainer.Type.READ, null);
  
      if (result < 0)
  
          throw new RuntimeException("Failed to open media file");
  
      int numStreams = container.getNumStreams();
  
      long duration = container.getDuration();
  
      long fileSize = container.getFileSize();
  
      long bitRate = container.getBitRate();
  
      System.out.println("Number of streams: " + numStreams);
  
      System.out.println("Duration (ms): " + duration);
  
      System.out.println("File Size (bytes): " + fileSize);
  
      System.out.println("Bit Rate: " + bitRate);
  
      for (int i = 0; i < numStreams; i++) {
  
          IStream stream = container.getStream(i);
  
          IStreamCoder coder = stream.getStreamCoder();
  
          System.out.println("*** Start of Stream Info ***");
  
          System.out.printf("stream %d: ", i);
  
          System.out.printf("type: %s; ", coder.getCodecType());
  
          System.out.printf("codec: %s; ", coder.getCodecID());
  
          System.out.printf("duration: %s; ", stream.getDuration());
  
          System.out.printf("start time: %s; ", container.getStartTime());
  
          System.out.printf("timebase: %d/%d; ", stream.getTimeBase().getNumerator(),
  
                  stream.getTimeBase().getDenominator());
  
          System.out.printf("coder tb: %d/%d; ", coder.getTimeBase().getNumerator(),
  
                  coder.getTimeBase().getDenominator());
  
          System.out.println();
  
          if (coder.getCodecType() == ICodec.Type.CODEC_TYPE_AUDIO) {
  
              System.out.printf("sample rate: %d; ", coder.getSampleRate());
  
              System.out.printf("channels: %d; ", coder.getChannels());
  
              System.out.printf("format: %s", coder.getSampleFormat());
  
          } else if (coder.getCodecType() == ICodec.Type.CODEC_TYPE_VIDEO) {
  
              System.out.printf("width: %d; ", coder.getWidth());
  
              System.out.printf("height: %d; ", coder.getHeight());
  
              System.out.printf("format: %s; ", coder.getPixelType());
  
              System.out.printf("frame-rate: %5.2f; ", coder.getFrameRate().getDouble());
  
          }
  
          System.out.println();
  
          System.out.println("*** End of Stream Info ***");

  UPDATE 07.06.2017
  I just tried it with VLCJ, but still I can not get the list of chapters.

      File file = new File("ia_ISL_13_r720P.m4v");
  
  
  
      NativeLibrary.addSearchPath(RuntimeUtil.getLibVlcLibraryName(), "vlc64/");
  
      Native.loadLibrary(RuntimeUtil.getLibVlcLibraryName(), LibVlc.class);
  
  
  
      MediaPlayerFactory mpf = new MediaPlayerFactory();
  
      EmbeddedMediaPlayer emp = mpf.newEmbeddedMediaPlayer();
  
  
  
      MediaMeta mediaMeta = mpf.getMediaMeta(file.getAbsolutePath(), true);
  
      MediaMetaData asMediaMetaData = mediaMeta.asMediaMetaData();
  
      System.out.println(asMediaMetaData.getAlbum());
  
      System.out.println(asMediaMetaData.getArtist());
  
      System.out.println(asMediaMetaData.getTitle());
  
  
  
      emp.prepareMedia(file.getAbsolutePath());
  
      emp.play();
  
      emp.nextChapter(); // -> GO NEXT CHAPTER - SUCCESS
  
  
  
      List> allChapterDescriptions = emp.getAllChapterDescriptions();
  
  
  
      for (List<string> list : allChapterDescriptions) {
  
          for (String string : list) {
  
              System.out.println(string);
  
          }
  
      }
  
  </string>

• vf_format : rework format list parsing

  24 mai 2014, par Anton Khirnov

  vf_format : rework format list parsing
  Avoid using AV_PIX_FMT_NB, since that hardcodes the number of pixel
  
  formats into lavfi and will break when a shared lavu is updated, adding
  
  new pixel formats.
  

  • [DH] libavfilter/vf_format.c