how to switch camera mode to video mode using GPUImage in ios - camera

Question

I am making app like Instagram .i am using GPUImage framework ,in this i have to take photos and videos and share. i able to capture photos using this framework and now i have to capture video but i am struggling how to change camera mode photos to video. any help and tutorial then its very good for me. I used this code camera for photos mode.
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
self.imagepicker.sourceType = UIImagePickerControllerSourceTypeCamera;
[[NSBundle mainBundle] loadNibNamed:#"OverlayView" owner:self options:nil];
self.overlayView.frame = self.imagepicker.cameraOverlayView.frame;
self.imagepicker.cameraOverlayView = self.overlayView;
self.overlayView = nil;
CGSize result = [[UIScreen mainScreen] bounds].size;
self.imagepicker.showsCameraControls = NO;
self.imagepicker.allowsEditing = NO;
self.imagepicker.wantsFullScreenLayout = NO;
// self.imagepicker.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeMovie, nil];
}
else{
self.imagepicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
}

Answer 1

In my case, I'm using GPUImage to do both (pictures and videos). Therefore I've created two objects: one of type GPUImageStillCamera(pictures) and other of type GPUImageVideoCamera (videos).
So whenever you need to switch between cameras you basically stop the GPUImageStillCamera capture and initialize a video camera (note that you have to adapt this snippet to your project):
func initializeVideoCamera() {
// Stop the capture of GPUImageStillCamera
stillCamera.stopCameraCapture()
videoCamera = GPUImageVideoCamera.init(sessionPreset: AVCaptureSessionPreset1920x1080, cameraPosition: .Back)
videoCamera?.outputImageOrientation = .Portrait
videoCamera?.addTarget(filter)
// If a file already exists, AVAssetWriter won't let you record new frames, so delete the old movie
unlink(pathToMovieFile)
initializeWriteWithPath(pathToMovieFile)
videoCamera?.startCameraCapture()
}