旋转标签mp4parser android

Question

我试着获取MP4视频中的旋转信息，我试着用mp4parser来做这个，但是我不知道我怎么能得到它，我在做这个，

IsoFile isoFile = null;
try {

    isoFile = new IsoFile(filePath);
} catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

List<Box> boxes = isoFile.getBoxes();

for (Box box : boxes) {
    System.out.println(box);
}

输出是这样

I/System.out(23548): FileTypeBox[majorBrand=isom;minorVersion=0;compatibleBrand=isom;compatibleBrand=3gp4]
I/System.out(23548): MovieBox[]
I/System.out(23548): com.coremedia.iso.boxes.FreeBox@0
I/System.out(23548): MediaDataBox{size=7913167}

知道怎么才能得到旋转标记值吗？

更新1工作代码

import java.io.File;
import java.io.FileInputStream;

import android.app.Activity;
import android.os.Bundle;

import com.coremedia.iso.IsoFile;
import com.coremedia.iso.IsoTypeReader;
import com.coremedia.iso.boxes.Box;
import com.coremedia.iso.boxes.MovieBox;
import com.coremedia.iso.boxes.UserDataBox;
import com.googlecode.mp4parser.authoring.Movie;
import com.googlecode.mp4parser.authoring.container.mp4.MovieCreator;
import com.googlecode.mp4parser.util.Matrix;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        String filePath = "/storage/emulated/0/test/test.mp4";
        Activity activity = (Activity) MainActivity.this;

        movie = MovieCreator.build(filePath);

        Matrix matrix = movie.getMatrix();

    }



}

Answer 1

您需要从Movie中获取IsoFile对象，或者用MovieCreator.build()读取它，然后使用movie.getMatrix()获取矩阵的类型：Matrix.ROTATE_O、Matrix.ROTATE_90、Matrix.ROTATE_180、Matrix.ROTATE_270。

String filePath = "/path/to/movie/file.mp4"
Movie movie = MovieCreator.build(new FileInputStream(new File(filePath)).getChannel());
Matrix matrix = movie.getMatrix();