exoplayer play video files in resource/raw

buildRawMediaSource.java

private MediaSource buildRawMediaSource() throws RawResourceDataSource.RawResourceDataSourceException {
    RawResourceDataSource rawDataSource = new RawResourceDataSource(this);
    // open the /raw resource file
    rawDataSource.open(new DataSpec(RawResourceDataSource.buildRawResourceUri(R.raw.test11_rotate_270)));
    return new ProgressiveMediaSource.Factory(new DefaultDataSourceFactory(this, "ExoTest")).createMediaSource(rawDataSource.getUri());
}

exiftool.sh

exiftool -rotation=90 video.mp4

ffmpeg.sh

ffmpeg -i input.mp4 -c copy -metadata:s:v:0 rotate=<x> output.mp4