Why the videos i record always are horizontal

[i2863CookieZJ]

All the videos I record on the vertical screen are horizontal. why?

[i2863CookieZJ]

mVideoSize = CameraUtil.chooseVideoSize(map.getOutputSizes(MediaRecorder.class));
mMediaRecorder.setVideoSize(mVideoSize.getWidth(), mVideoSize.getHeight());
mVideoSize.getWidth() > mVideoSize.getHeight() even when my screen are vertical ;