mp4parser: Rotation problem when appending movies from different camera on the phone

Hi.

Maybe this has been reported before. I have this method below that merges my videos into a final mp4 file. However. When I record with the front camera first and then the back. The orientation changes. Suddenly, the movie recorded from the back is now showing upside down. The same happens when I record the backcamera and then the frontcamera.

What is the simple rotate mechanism for a video track? It doesn’t help to set orientation on video recording or the camera. It will give me the same issue.

my code

private void mergeMovies(File outFile) {
    try {
        int totalFilesToMerge = mMoviesToMergeList.get().size();
        Movie finalMovie = new Movie();
        Track[] movieTracks = new Track[totalFilesToMerge];
        Track[] audioTracks = new Track[totalFilesToMerge];

        for (int i = 0; i < totalFilesToMerge; i++) {
            Movie movie = MovieCreator.build(mMoviesToMergeList.get().get(i).getPath());
            if(movie.getTracks().get(0).getHandler().equals("vide")) {
                movieTracks[i] = movie.getTracks().get(0);
            }

            if(movie.getTracks().get(1).getHandler().equals("soun")) {
                audioTracks[i] = movie.getTracks().get(1);
            }

        }
        finalMovie.addTrack(new AppendTrack(movieTracks));
        finalMovie.addTrack(new AppendTrack(audioTracks));

        FileOutputStream fos = new FileOutputStream(outFile);
        BasicContainer container = (BasicContainer) new DefaultMp4Builder().build(finalMovie);
        container.writeContainer(fos.getChannel());
        fos.close();
    } catch (IOException ie) {
        Log.e("ERROR MOVIE", "Something is wrong");
    }
}