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Code Quality Rank: L3
Programming language: Objective-C
License: MIT License
Tags: Hardware     Camera    
Latest version: v0.6.1

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README

PBJVision

PBJVision

PBJVision is a camera library for iOS that enables easy integration of special capture features and camera interface customizations in your iOS app. Next Level is the Swift counterpart.

Build Status Pod Version GitHub license

Features

  • [x] touch-to-record video capture
  • [x] slow motion capture (120 fps on supported hardware)
  • [x] photo capture
  • [x] customizable user interface and gestural interactions
  • [x] ghosting (onion skinning) of last recorded segment
  • [x] flash/torch support
  • [x] white balance, focus, and exposure adjustment support
  • [x] mirroring support

Capture is also possible without having to use the touch-to-record gesture interaction as the sample project provides.

About

This library was originally created at DIY as a fun means for kids to author video and share their skills. The touch-to-record interaction was pioneered by Vine and Instagram.

Thanks to everyone who has contributed and helped make this a fun project and community.

Quick Start

PBJVision is available and recommended for installation using the dependency manager CocoaPods.

To integrate, just add the following line to your Podfile:

pod 'PBJVision'

Usage

Import the header.

#import "PBJVision.h"

Setup the camera preview using [[PBJVision sharedInstance] previewLayer].

    // preview and AV layer
    _previewView = [[UIView alloc] initWithFrame:CGRectZero];
    _previewView.backgroundColor = [UIColor blackColor];
    CGRect previewFrame = CGRectMake(0, 60.0f, CGRectGetWidth(self.view.frame), CGRectGetWidth(self.view.frame));
    _previewView.frame = previewFrame;
    _previewLayer = [[PBJVision sharedInstance] previewLayer];
    _previewLayer.frame = _previewView.bounds;
    _previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
    [_previewView.layer addSublayer:_previewLayer];

If your view controller is managed by a Storyboard, keep the previewLayer updated for device sizes

- (void)viewDidLayoutSubviews
{
    _previewLayer.frame = _previewView.bounds;
}

Setup and configure the PBJVision controller, then start the camera preview.

- (void)_setup
{
    _longPressGestureRecognizer.enabled = YES;

    PBJVision *vision = [PBJVision sharedInstance];
    vision.delegate = self;
    vision.cameraMode = PBJCameraModeVideo;
    vision.cameraOrientation = PBJCameraOrientationPortrait;
    vision.focusMode = PBJFocusModeContinuousAutoFocus;
    vision.outputFormat = PBJOutputFormatSquare;

    [vision startPreview];
}

Start/pause/resume recording.

- (void)_handleLongPressGestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
{
    switch (gestureRecognizer.state) {
      case UIGestureRecognizerStateBegan:
        {
            if (!_recording)
                [[PBJVision sharedInstance] startVideoCapture];
            else
                [[PBJVision sharedInstance] resumeVideoCapture];
            break;
        }
      case UIGestureRecognizerStateEnded:
      case UIGestureRecognizerStateCancelled:
      case UIGestureRecognizerStateFailed:
        {
            [[PBJVision sharedInstance] pauseVideoCapture];
            break;
        }
      default:
        break;
    }
}

End recording.

    [[PBJVision sharedInstance] endVideoCapture];

Handle the final video output or error accordingly.

- (void)vision:(PBJVision *)vision capturedVideo:(NSDictionary *)videoDict error:(NSError *)error
{   
    if (error && [error.domain isEqual:PBJVisionErrorDomain] && error.code == PBJVisionErrorCancelled) {
        NSLog(@"recording session cancelled");
        return;
    } else if (error) {
        NSLog(@"encounted an error in video capture (%@)", error);
        return;
    }

    _currentVideo = videoDict;

    NSString *videoPath = [_currentVideo  objectForKey:PBJVisionVideoPathKey];
    [_assetLibrary writeVideoAtPathToSavedPhotosAlbum:[NSURL URLWithString:videoPath] completionBlock:^(NSURL *assetURL, NSError *error1) {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle: @"Video Saved!" message: @"Saved to the camera roll."
                                                       delegate:self
                                              cancelButtonTitle:nil
                                              otherButtonTitles:@"OK", nil];
        [alert show];
    }];
}

To specify an automatic end capture maximum duration, set the following property on the 'PBJVision' controller.

    [[PBJVision sharedInstance] setMaximumCaptureDuration:CMTimeMakeWithSeconds(5, 600)]; // ~ 5 seconds

To adjust the video quality and compression bit rate, modify the following properties on the PBJVision controller.

    @property (nonatomic, copy) NSString *captureSessionPreset;

    @property (nonatomic) CGFloat videoBitRate;
    @property (nonatomic) NSInteger audioBitRate;
    @property (nonatomic) NSDictionary *additionalCompressionProperties;

Community

Contributions and discussions are welcome!

Project

Related Projects

Resources

License

PBJVision is available under the MIT license, see the LICENSE file for more information.


*Note that all licence references and agreements mentioned in the PBJVision README section above are relevant to that project's source code only.