Orienting the camera to a webcam and phone

Question

I made an application where I need to record video. When I launch it in my emulator using the camera’s camera orientation, this is normal, but when I run the same on the phone, the orientation becomes 90 degrees changed. Kant realizes that this is happening. Can someone help me? here is my code ---

private boolean prepareMediaRecorder(){
    myCamera = getCameraInstance();         
    mediaRecorder = new MediaRecorder();
    myCamera.unlock();
    mediaRecorder.setCamera(myCamera);

    mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
    mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);

    mediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH));

    mediaRecorder.setOutputFile("/sdcard/video.mp4");

    mediaRecorder.setMaxDuration(60000); // Set max duration 60 sec.
    mediaRecorder.setMaxFileSize(5000000); // Set max file size 5M

    mediaRecorder.setPreviewDisplay(myCameraSurfaceView.getHolder().getSurface());

    try {
        mediaRecorder.prepare();
    } catch (IllegalStateException e) {
        releaseMediaRecorder();
        return false;
    } catch (IOException e) {
        releaseMediaRecorder();
        return false;
    }
    return true;

}

Answer 1

The orientation of the preview depends on the orientation of the device and the orientation of the camera.

Basically, you need to calculate the orientation of the camera’s preview based on these conditions.

We need two help methods:

1 - Calculate the orientation of the device:

public int getDeviceOrientation(Context context) {

    int degrees = 0;
    WindowManager windowManager =
            (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
    int rotation = windowManager.getDefaultDisplay().getRotation();

    switch(rotation) {
        case Surface.ROTATION_0:
            degrees = 0;
            break;
        case Surface.ROTATION_90:
            degrees = 90;
            break;
        case Surface.ROTATION_180:
            degrees = 180;
            break;
        case Surface.ROTATION_270:
            degrees = 270;
            break;
    }

    return degrees;
}  

2 - :

public static int getPreviewOrientation(Context context, int cameraId) {

   int temp = 0;
   int previewOrientation = 0;

   Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
   Camera.getCameraInfo(cameraId, cameraInfo);

   int deviceOrientation = getDeviceOrientation(context);
   temp = cameraInfo.orientation - deviceOrientation + 360;
   previewOrientation = temp % 360;

    return previewOrientation;
}

mediaRecorder.prepare();

int rotation = getPreviewOrientation(context, cameraId);
mediaRecorder.setOrientationHint(rotation);  

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