PBJVision is an iOS camera engine library that supports touch-to-record video, slow motion video (120 fps on supported hardware), and photo capture.
The library also supports features such as onion skinning (ghosting), flash/torch usage, white balance adjustment, focus adjustment, exposure adjustment, and mirroring. Pause and resume video capture is also possible without having to use the touch-to-record gesture interaction as the sample project provides.
I created this library at DIY as a fun means for young people to author video and share their skills. The touch-to-record interaction was originally pioneered by Vine and also adopted by Instagram. Thanks to everyone who has contributed and helped make this a fun project and community.
If you need a video player, check out PBJVideoPlayer (obj-c) and Player (Swift).
Please review the release history for a summary of the latest changes and more information.
Contributions are welcome!
CocoaPods is the recommended method of installing PBJVision, just add the following line to your Podfile:
pod 'PBJVision'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];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 secondsTo 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;- Need help? Use Stack Overflow with the tag 'pbjvision'.
- Questions? Use Stack Overflow with the tag 'pbjvision'.
- Found a bug? Open an issue.
- Feature idea? Open an issue.
- Want to contribute? Submit a pull request.
- AV Foundation Programming Guide
- PBJVideoPlayer, a simple iOS video player in Objective-C
- Player, a simple iOS video player in Swift
PBJVision is available under the MIT license, see the LICENSE file for more information.
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