在java中将360°元数据插入mp4文件

Question

我正在尝试用这个库添加360°元数据到mp4文件:https://github.com/copiousfreetime/mp4parser

检查代码后，我创建了这个:

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);
}

，我在这里执行它:

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;
}

这两个方法是在我的MP4BuilderV2和我称之为TrimActivity在这里像这样:

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();

但是在最后一次尝试/捕获我得到这个错误:java.nio.BufferOverflowException

如果有人有解决方案，请提前感谢

Answer 1

我和你有同样的问题，寻找解决方案，我发现了一个元标签插入实现对我有用，也许它可以帮助你。