Saving video after tapping use in UIImagePickerController - objective-c

Question

I am have an app that calls UIImagePickerController, and you take video using the controller. After you take the video, I want the video to be saved into the camera roll after clicking use in the UIImagePickerController.
Can you help me?
Oh, and UIImagePickerController comes with the option to switch to video, default photo. I want this to be only video, not photo.
My current code is :
picker.sourceType=UIImagePickerControllerCameraCaptureModeVideo;
picker.mediaTypes=[UIImagePickerController availableMediaTypesForSourceType:picker.sourceType];

Answer 1

Once you have implemented the following delegate method, pressing the 'Use' button will save your recorded video to the camera roll.
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
NSURL *recordedVideoURL= [info objectForKey:UIImagePickerControllerMediaURL];
if ([library videoAtPathIsCompatibleWithSavedPhotosAlbum:recordedVideoURL]) {
[library writeVideoAtPathToSavedPhotosAlbum:recordedVideoURL
completionBlock:^(NSURL *assetURL, NSError *error){}
];
}
[library release];
}
Use the following to set the capture mode to video :
imagePickerController.cameraCaptureMode = UIImagePickerControllerCameraCaptureModeVideo;
Here is the complete code that I use to launch the image picker for video recording :
UIImagePickerController * imagePickerController = [[UIImagePickerController alloc] init];
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
imagePickerController.mediaTypes = [NSArray arrayWithObject:(NSString *)kUTTypeMovie];
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePickerController.showsCameraControls = YES;
imagePickerController.cameraCaptureMode = UIImagePickerControllerCameraCaptureModeVideo;
imagePickerController.delegate = self;
imagePickerController.cameraDevice = UIImagePickerControllerCameraDeviceFront;
[self presentModalViewController:imagePickerController animated:YES];
}

Answer 2

I was trying to save the video using the absoluteURL of the URL but it didn't work
NSURL *mediaURL = [info objectForKey: UIImagePickerControllerMediaURL];
UISaveVideoAtPathToSavedPhotosAlbum(mediaURL.absoluteString, self, #selector(video:didFinishSavingWithError:contextInfo:), nil);
It finally worked using the path property:
UISaveVideoAtPathToSavedPhotosAlbum([mediaURL path], self, #selector(video:didFinishSavingWithError:contextInfo:), nil);
Hope it helps anyone.

Answer 3

From the UIImagePickerControllerDelegate class reference:
To save a still image to the user’s Camera Roll album, call the
UIImageWriteToSavedPhotosAlbum function from within the body of the
imagePickerController:didFinishPickingMediaWithInfo: method. To save a
movie to the user’s Camera Roll album, instead call the
UISaveVideoAtPathToSavedPhotosAlbum function. These functions,
described in UIKit Function Reference, save the image or movie only;
they do not save metadata.
Your UIImagePickerControllerDelegate may look something like this...
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
NSString *mediaType = [info objectForKey:#"mediaType"];
if (![mediaType isEqualToString:kUTTypeMovie])
return;
NSURL *mediaURL = [info objectForKey:#"mediaURL"];
UISaveVideoAtPathToSavedPhotosAlbum(mediaURL.absoluteString, self, #selector(video:didFinishSavingWithError:contextInfo:), NULL);
}
- (void)video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo: (void *)contextInfo
{
if (!videoPath && error)
{
NSLog(#"Error saving video to saved photos roll: %#, %#", error, [error userInfo]);
// Handle error;
return;
}
// Video was saved properly. UI may need to be updated here.
}
Notice that I've implemented the completion selector for UISaveVideoToSavedPhotosAlbum(). If it were to fail for any reason, the error would be reported here and you can then handle it appropriately.