android - 如何在android中配音视频

Question

我想在Android中制作一个配音应用程序。该应用程序的流程是：

1. 从图库中获取视频和音频。
2. 减少视频文件的原始声音。并在此视频文件上混合（配音）选定的音频。
3. 在此视频文件上混合音频后，将其保存到外部存储器中。

我为此使用 MediaMuxer，但没有成功。请帮助我解决这个问题。

问候， 普拉泰克

Answer 1

即使我正在寻找相同的方法来使用 mediaMuxer 为我的视频配音，MediaMuxer 对我来说是一个有点难以理解的概念，因为我是初学者。我最终参考了这个 github 代码。https://github.com/tqnst/MP4ParserMergeAudioVideo 这是我的救星。真的感谢那个人。我刚刚从中提取了我想要的代码，即用我指定的音频配音视频。

这是我在下面的项目中使用的代码

private void mergeAudioVideo(String originalVideoPath,String AudioPath,String OutPutVideoPath) {
    // TODO Auto-generated method stub
    Movie video = null;
    try {
        new MovieCreator();
        video = MovieCreator.build(originalVideoPath);
    } catch (RuntimeException e) {
        e.printStackTrace();

    } catch (IOException e) {
        e.printStackTrace();

    }

    Movie audio = null;
    try {
        new MovieCreator();
        audio = MovieCreator.build(AudioPath);
    } catch (IOException e) {
        e.printStackTrace();

    } catch (NullPointerException e) {
        e.printStackTrace();

    }
    List<Track> videoTracks = new LinkedList<Track>();
    for (Track t : video.getTracks()) {
        if (t.getHandler().equals("vide")) {
            videoTracks.add(t);
         //seperate the video from the orginal video
        }
    }
    Track audioTrack = audio.getTracks().get(0);// get your audio track to dub the video
    Movie result = new Movie();
    result.addTrack(videoTracks.get(0)); // add the video seprated from the originals
    result.addTrack(audioTrack); //add the track to be put in resul video

    Container out = new DefaultMp4Builder().build(result);

    FileOutputStream fos = null;
    try {
        fos = new FileOutputStream(OutPutVideoPath);
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }

    BufferedWritableFileByteChannel byteBufferByteChannel = new BufferedWritableFileByteChannel(fos);
    try {
        out.writeContainer(byteBufferByteChannel);
        byteBufferByteChannel.close();
        fos.close();
    } catch (IOException e) {
        e.printStackTrace();
    }

}

这是 BufferedWritableFileByteChannel 类，用于将 outputVideo 数据写入目录。

public class BufferedWritableFileByteChannel implements WritableByteChannel {
private static final int BUFFER_CAPACITY = 1000000;

private boolean isOpen = true;
private final OutputStream outputStream;
private final ByteBuffer byteBuffer;
private final byte[] rawBuffer = new byte[BUFFER_CAPACITY];

public BufferedWritableFileByteChannel(OutputStream outputStream) {
    this.outputStream = outputStream;
    this.byteBuffer = ByteBuffer.wrap(rawBuffer);
}

@Override
public int write(ByteBuffer inputBuffer) throws IOException {
    int inputBytes = inputBuffer.remaining();

    if (inputBytes > byteBuffer.remaining()) {
        dumpToFile();
        byteBuffer.clear();

        if (inputBytes > byteBuffer.remaining()) {
            throw new BufferOverflowException();
        }
    }

    byteBuffer.put(inputBuffer);

    return inputBytes;
}

@Override
public boolean isOpen() {
    return isOpen;
}

@Override
public void close() throws IOException {
    dumpToFile();
    isOpen = false;
}
private void dumpToFile() {
    try {
        outputStream.write(rawBuffer, 0, byteBuffer.position());
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
  }
}

并且不要忘记在您的项目中添加库。

这可能不是您问题的确切答案。但至少它能够阐明可能的解决方案。