Вставка 360 ° метаданные в MP4 файл в Java

Question

Я пытаюсь добавить 360 ° метаданных в файл mp4 с этой библиотекой: https://github.com/copiousfreetime/mp4parser

после того, как проверить код, я создал это:

public void injectSphericalMetaV2(TrackBox trackBox) throws IOException { 
    String sphericalVideoGlobalMetadata = "<rdf:SphericalVideo xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\"xmlns:GSpherical=\"http://ns.google.com/videos/1.0/spherical/\"><GSpherical:Spherical>true</GSpherical:Spherical><GSpherical:Stitched>true</GSpherical:Stitched><GSpherical:StitchingSoftware>GIROPTIC 360 CAM</GSpherical:StitchingSoftware><GSpherical:ProjectionType>equirectangular</GSpherical:ProjectionType></rdf:SphericalVideo>"; 
    String UUID_ID = "FFCC8263-F855-4A93-8814-587A02521FDD"; 
    UserBox sphericalAtom = new UserBox(UUID_ID.getBytes()); 
    sphericalAtom.setData(sphericalVideoGlobalMetadata.getBytes()); 
    trackBox.addBox(sphericalAtom); 
} 

и я исполняю его здесь:

protected TrackBox createTrackBox(Track track, Movie movie, Map<Track, int[]> chunks) { 

    TrackBox trackBox = new TrackBox(); 
    TrackHeaderBox tkhd = new TrackHeaderBox(); 

    tkhd.setEnabled(true); 
    tkhd.setInMovie(true); 

    tkhd.setMatrix(track.getTrackMetaData().getMatrix()); 

    tkhd.setAlternateGroup(track.getTrackMetaData().getGroup()); 
    tkhd.setCreationTime(track.getTrackMetaData().getCreationTime()); 

    if (track.getEdits() == null || track.getEdits().isEmpty()) { 
     tkhd.setDuration(track.getDuration() * getTimescale(movie)/track.getTrackMetaData().getTimescale()); 
    } else { 
     long d = 0; 
     for (Edit edit : track.getEdits()) { 
      d += (long) edit.getSegmentDuration(); 
     } 
     tkhd.setDuration(d * track.getTrackMetaData().getTimescale()); 
    } 


    tkhd.setHeight(track.getTrackMetaData().getHeight()); 
    tkhd.setWidth(track.getTrackMetaData().getWidth()); 
    tkhd.setLayer(track.getTrackMetaData().getLayer()); 
    tkhd.setModificationTime(new Date()); 
    tkhd.setTrackId(track.getTrackMetaData().getTrackId()); 
    tkhd.setVolume(track.getTrackMetaData().getVolume()); 

    trackBox.addBox(tkhd); 

    trackBox.addBox(createEdts(track, movie)); 

    MediaBox mdia = new MediaBox(); 
    trackBox.addBox(mdia); 
    MediaHeaderBox mdhd = new MediaHeaderBox(); 
    mdhd.setCreationTime(track.getTrackMetaData().getCreationTime()); 
    mdhd.setDuration(track.getDuration()); 
    mdhd.setTimescale(track.getTrackMetaData().getTimescale()); 
    mdhd.setLanguage(track.getTrackMetaData().getLanguage()); 
    mdia.addBox(mdhd); 
    HandlerBox hdlr = new HandlerBox(); 
    mdia.addBox(hdlr); 

    hdlr.setHandlerType(track.getHandler()); 

    MediaInformationBox minf = new MediaInformationBox(); 
    if (track.getHandler().equals("vide")) { 
     try { 
      injectSphericalMetaV2(trackBox); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
     minf.addBox(new VideoMediaHeaderBox()); 
    } else if (track.getHandler().equals("soun")) { 
     minf.addBox(new SoundMediaHeaderBox()); 
    } else if (track.getHandler().equals("text")) { 
     minf.addBox(new NullMediaHeaderBox()); 
    } else if (track.getHandler().equals("subt")) { 
     minf.addBox(new SubtitleMediaHeaderBox()); 
    } else if (track.getHandler().equals("hint")) { 
     minf.addBox(new HintMediaHeaderBox()); 
    } else if (track.getHandler().equals("sbtl")) { 
     minf.addBox(new NullMediaHeaderBox()); 
    } 

    // dinf: all these three boxes tell us is that the actual 
    // data is in the current file and not somewhere external 
    DataInformationBox dinf = new DataInformationBox(); 
    DataReferenceBox dref = new DataReferenceBox(); 
    dinf.addBox(dref); 
    DataEntryUrlBox url = new DataEntryUrlBox(); 
    url.setFlags(1); 
    dref.addBox(url); 
    minf.addBox(dinf); 
    Box stbl = createStbl(track, movie, chunks); 
    minf.addBox(stbl); 
    mdia.addBox(minf); 
    LOG.logDebug("done with trak for track_" + track.getTrackMetaData().getTrackId()); 
    return trackBox; 
} 

эти 2 метода в моем MP4BuilderV2 и я называю это здесь TrimActivity так:

Container out = new DefaultMp4BuilderV2().build(movie); 
     MovieHeaderBox mvhd = Path.getPath(out, "moov/mvhd"); 
     mvhd.setMatrix(Matrix.ROTATE_180); 

     if (!dst.exists()) { 
      dst.createNewFile(); 
     } else { 
      dst.delete(); 
      dst.createNewFile(); 
     } 
     FileOutputStream fos = new FileOutputStream(dst); 
     WritableByteChannel fc = fos.getChannel(); 
     try { 
      out.writeContainer(fc); 
     }catch (Exception e) { 
      Log.e("erreur", e.toString()); 
     }finally { 
      fc.close(); 
      fos.close(); 
      file.close(); 
     } 
     file.close(); 

Но в последнем Try/уловом я получаю эту ошибку: java.nio.BufferOverflowException

Если кто-то имеет решение заранее спасибо

Answer 1

Я был с той же проблемой, как и вы, в поисках Я нашел meta tag insertion implementation, который работал для меня, может быть, это поможет вам.