IOS: Swift: captura de pantalla de video

¿En qué se llama el dispositivo de pantalla en iOS / Swift?

Cuando imprimo los dispositivos que recibo

( "<AVCaptureFigVideoDevice: 0x134d0f210 [Back Camera][com.apple.avfoundation.avcaptunetworkingevice.built-in_video:0]>", "<AVCaptureFigVideoDevice: 0x134e0af80 [Front Camera][com.apple.avfoundation.avcaptunetworkingevice.built-in_video:1]>", "<AVCaptureFigAudioDevice: 0x174265440 [iPad Microphone][com.apple.avfoundation.avcaptunetworkingevice.built-in_audio:0]>" ) 

Entonces, ¿dónde está la ID de la pantalla?

Hay demasiado código c objective desactualizado, mientras que swift es un objective en movimiento. Estoy buscando una solución rápida para capturar video desde la pantalla de mi iPad y audio desde el micrófono incorporado. El audio será una pregunta por separado.

Aquí hay un capturador de pantalla para OS X

https://github.com/kennyledet/SwiftCap

  // AVCaptureSession holds inputs and outputs for real-time capture let mSession = AVCaptureSession() let mScreenCapOutput = AVCaptureMovieFileOutput() var mOutputPath = "" // Just capture main display for now let mMainDisplayId = CGMainDisplayID() 

pero no puedo encontrar en la documentation la ID de visualización, CGMainDisplayID, para un iPad …

Aquí hay una solución típica para una camera en swift

https://github.com/bradley/iOSSwiftSimpleAVCamera

pero tiene demasiados errores y no se comstack con iOS 8.1 o 8.2 y toma video de la camera.

 func addVideoOutput() { var rgbOutputSettings: NSDictionary = NSDictionary(object: Int(CInt(kCIFormatRGBA8)), forKey: kCVPixelBufferPixelFormatTypeKey) self.videoDeviceOutput = AVCaptureVideoDataOutput() self.videoDeviceOutput.alwaysDiscardsLateVideoFrames = true self.videoDeviceOutput.setSampleBufferDelegate(self, queue: self.sessionQueue) if self.session.canAddOutput(self.videoDeviceOutput) { self.session.addOutput(self.videoDeviceOutput) } } 

https://developer.apple.com/library/ios/documentation/AudioVideo/Conceptual/AVFoundationPG/Articles/04_MediaCapture.html#//apple_ref/doc/uid/TP40010188-CH5-SW18

Apple ofrece una solución objective-c como esta

 /* * Create video connection */ AVCaptureDeviceInput *videoIn = [[AVCaptureDeviceInput alloc] initWithDevice:[self videoDeviceWithPosition:AVCaptureDevicePositionBack] error:nil]; if ([_captureSession canAddInput:videoIn]) [_captureSession addInput:videoIn]; AVCaptureVideoDataOutput *videoOut = [[AVCaptureVideoDataOutput alloc] init]; [videoOut setAlwaysDiscardsLateVideoFrames:YES]; [videoOut setVideoSettings:@{(id)kCVPixelBufferPixelFormatTypeKey : [NSNumber numberWithInt:kCVPixelFormatType_32BGRA]}]; dispatch_queue_t videoCaptureQueue = dispatch_queue_create("Video Capture Queue", DISPATCH_QUEUE_SERIAL); [videoOut setSampleBufferDelegate:self queue:videoCaptureQueue]; if ([_captureSession canAddOutput:videoOut]) [_captureSession addOutput:videoOut]; _videoConnection = [videoOut connectionWithMediaType:AVMediaTypeVideo]; self.videoOrientation = _videoConnection.videoOrientation; if([self.session canSetSessionPreset:AVCaptureSessionPreset640x480]) [self.session setSessionPreset:AVCaptureSessionPreset640x480]; // Lower video resolution to decrease recorded movie size return YES; } 

Esto debería ser fácil ….. ???

Aquí hay una copy de trabajo de iOSSwiftSimpleAVCamera en swift. No soluciona completamente su problema, pero es un punto de partida para cualquier otra persona que vea este hilo. Parte de la comprobación de errores se eliminó de este código, por lo que debe estar cansado, solo funcionará en un dispositivo real que no esté en el simulador.

Delegado de la aplicación

 // // AppDelegate.swift // iOSSwiftSimpleAVCamera // // Created by Bradley Griffith on 7/1/14. // Copyright (c) 2014 Bradley Griffith. All rights reserved. // import UIKit import CoreData @UIApplicationMain class AppDelegate: UIResponder, UIApplicationDelegate { var window: UIWindow? func applicationDidFinishLaunching(application: UIApplication) { } func applicationWillResignActive(application: UIApplication) { // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state. // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game. } func applicationDidEnterBackground(application: UIApplication) { // Use this method to release shanetworking resources, save user data, invalidate timers, and store enough application state information to restre your application to its current state in case it is terminated later. // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits. } func applicationWillEnterForeground(application: UIApplication) { // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background. } func applicationDidBecomeActive(application: UIApplication) { // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface. } func applicationWillTerminate(application: UIApplication) { // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:. // Saves changes in the application's managed object context before the application terminates. self.saveContext() } func saveContext () { var error: NSError? = nil let managedObjectContext = self.managedObjectContext //if managedObjectContext != nil { if managedObjectContext.hasChanges && !managedObjectContext.save(&error) { // Replace this implementation with code to handle the error appropriately. // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. //println("Unresolved error \(error), \(error.userInfo)") abort() // &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&} } } // #pragma mark - Core Data stack // Returns the managed object context for the application. // If the context doesn't already exist, it is created and bound to the persistent store coordinator for the application. var managedObjectContext: NSManagedObjectContext { if !(_managedObjectContext != nil) { let coordinator = self.persistentStoreCoordinator //if coordinator != nil { _managedObjectContext = NSManagedObjectContext() _managedObjectContext!.persistentStoreCoordinator = coordinator //&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&} } return _managedObjectContext! } var _managedObjectContext: NSManagedObjectContext? = nil // Returns the managed object model for the application. // If the model doesn't already exist, it is created from the application's model. var managedObjectModel: NSManagedObjectModel { if !(_managedObjectModel != nil) { let modelURL = NSBundle.mainBundle().URLForResource("iOSSwiftSimpleAVCamera", withExtension: "momd") _managedObjectModel = NSManagedObjectModel(contentsOfURL: modelURL!) } return _managedObjectModel! } var _managedObjectModel: NSManagedObjectModel? = nil // Returns the persistent store coordinator for the application. // If the coordinator doesn't already exist, it is created and the application's store added to it. var persistentStoreCoordinator: NSPersistentStoreCoordinator { if !(_persistentStoreCoordinator != nil) { let storeURL = self.applicationDocumentsDirectory.URLByAppendingPathComponent("iOSSwiftSimpleAVCamera.sqlite") var error: NSError? = nil _persistentStoreCoordinator = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel) if _persistentStoreCoordinator!.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: storeURL, options: nil, error: &error) == nil { /* Replace this implementation with code to handle the error appropriately. abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. Typical reasons for an error here include: * The persistent store is not accessible; * The schema for the persistent store is incompatible with current managed object model. Check the error message to determine what the actual problem was. If the persistent store is not accessible, there is typically something wrong with the file path. Often, a file URL is pointing into the application's resources directory instead of a writeable directory. If you encounter schema incompatibility errors during development, you can networkinguce their frequency by: * Simply deleting the existing store: NSFileManager.defaultManager().removeItemAtURL(storeURL, error: nil) * Performing automatic lightweight migration by passing the following dictionary as the options parameter: [NSMigratePersistentStoresAutomaticallyOption: true, NSInferMappingModelAutomaticallyOption: true} Lightweight migration will only work for a limited set of schema changes; consult "Core Data Model Versioning and Data Migration Programming Guide" for details. */ //println("Unresolved error \(error), \(error.userInfo)") abort() } } return _persistentStoreCoordinator! } var _persistentStoreCoordinator: NSPersistentStoreCoordinator? = nil // #pragma mark - Application's Documents directory // Returns the URL to the application's Documents directory. var applicationDocumentsDirectory: NSURL { let urls = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask) return urls[urls.endIndex-1] as! NSURL } } 

CameraSessionController

 // // CameraSessionController.swift // iOSSwiftSimpleAVCamera // // Created by Bradley Griffith on 7/1/14. // Copyright (c) 2014 Bradley Griffith. All rights reserved. // import UIKit import AVFoundation import CoreMedia import CoreImage @objc protocol CameraSessionControllerDelegate { optional func cameraSessionDidOutputSampleBuffer(sampleBuffer: CMSampleBuffer!) } class CameraSessionController: NSObject, AVCaptureVideoDataOutputSampleBufferDelegate { var session: AVCaptureSession! var sessionQueue: dispatch_queue_t! var videoDeviceInput: AVCaptureDeviceInput! var videoDeviceOutput: AVCaptureVideoDataOutput! var stillImageOutput: AVCaptureStillImageOutput! var runtimeErrorHandlingObserver: AnyObject? var sessionDelegate: CameraSessionControllerDelegate? /* Class Methods ------------------------------------------*/ class func deviceWithMediaType(mediaType: NSString, position: AVCaptureDevicePosition) -> AVCaptureDevice { var devices: NSArray = AVCaptureDevice.devicesWithMediaType(mediaType as String) var captureDevice: AVCaptureDevice = devices.firstObject as! AVCaptureDevice for object:AnyObject in devices { let device = object as! AVCaptureDevice if (device.position == position) { captureDevice = device break } } return captureDevice } /* Lifecycle ------------------------------------------*/ override init() { super.init(); self.session = AVCaptureSession() self.authorizeCamera(); self.sessionQueue = dispatch_queue_create("CameraSessionController Session", DISPATCH_QUEUE_SERIAL) dispatch_async(self.sessionQueue, { self.session.beginConfiguration() self.addVideoInput() self.addVideoOutput() self.addStillImageOutput() self.session.commitConfiguration() }) } /* Instance Methods ------------------------------------------*/ func authorizeCamera() { AVCaptureDevice.requestAccessForMediaType(AVMediaTypeVideo, completionHandler: { (granted: Bool) -> Void in // If permission hasn't been granted, notify the user. if !granted { dispatch_async(dispatch_get_main_queue(), { UIAlertView( title: "Could not use camera!", message: "This application does not have permission to use camera. Please update your privacy settings.", delegate: self, cancelButtonTitle: "OK").show() }) } }); } func addVideoInput() -> Bool { var success: Bool = false var error: NSError? var videoDevice: AVCaptureDevice = CameraSessionController.deviceWithMediaType(AVMediaTypeVideo, position: AVCaptureDevicePosition.Back) self.videoDeviceInput = AVCaptureDeviceInput.deviceInputWithDevice(videoDevice, error: &error) as! AVCaptureDeviceInput; if !(error != nil) { if self.session.canAddInput(self.videoDeviceInput) { self.session.addInput(self.videoDeviceInput) success = true } } return success } func addVideoOutput() { //&&&&&&&&&&&&&&&&&&&&&var rgbOutputSettings: NSDictionary = NSDictionary(object: Int(CInt(kCIFormatRGBA8)), forKey: kCVPixelBufferPixelFormatTypeKey) self.videoDeviceOutput = AVCaptureVideoDataOutput() self.videoDeviceOutput.alwaysDiscardsLateVideoFrames = true self.videoDeviceOutput.setSampleBufferDelegate(self, queue: self.sessionQueue) if self.session.canAddOutput(self.videoDeviceOutput) { self.session.addOutput(self.videoDeviceOutput) } } func addStillImageOutput() { self.stillImageOutput = AVCaptureStillImageOutput() self.stillImageOutput.outputSettings = [AVVideoCodecKey: AVVideoCodecJPEG] if self.session.canAddOutput(self.stillImageOutput) { self.session.addOutput(self.stillImageOutput) } } func startCamera() { dispatch_async(self.sessionQueue, { var weakSelf: CameraSessionController? = self self.runtimeErrorHandlingObserver = NSNotificationCenter.defaultCenter().addObserverForName(AVCaptureSessionRuntimeErrorNotification, object: self.sessionQueue, queue: nil, usingBlock: { (note: NSNotification!) -> Void in let strongSelf: CameraSessionController = weakSelf! dispatch_async(strongSelf.sessionQueue, { strongSelf.session.startRunning() }) }) self.session.startRunning() }) } func teardownCamera() { dispatch_async(self.sessionQueue, { self.session.stopRunning() NSNotificationCenter.defaultCenter().removeObserver(self.runtimeErrorHandlingObserver!) }) } func focusAndExposeAtPoint(point: CGPoint) { dispatch_async(self.sessionQueue, { var device: AVCaptureDevice = self.videoDeviceInput.device var error: NSErrorPointer! if device.lockForConfiguration(error) { if device.focusPointOfInterestSupported && device.isFocusModeSupported(AVCaptureFocusMode.AutoFocus) { device.focusPointOfInterest = point device.focusMode = AVCaptureFocusMode.AutoFocus } if device.exposurePointOfInterestSupported && device.isExposureModeSupported(AVCaptureExposureMode.AutoExpose) { device.exposurePointOfInterest = point device.exposureMode = AVCaptureExposureMode.AutoExpose } device.unlockForConfiguration() } else { // TODO: Log error. } }) } func captureImage(completion:((image: UIImage?, error: NSError?) -> Void)?) { if (completion != nil){ if(self.stillImageOutput != nil) { return }} dispatch_async(self.sessionQueue, { self.stillImageOutput.captureStillImageAsynchronouslyFromConnection(self.stillImageOutput.connectionWithMediaType(AVMediaTypeVideo), completionHandler: { (imageDataSampleBuffer: CMSampleBuffer?, error: NSError?) -> Void in if (imageDataSampleBuffer != nil) { if(error != nil) { completion!(image:nil, error:nil) } } else if (imageDataSampleBuffer != nil) { var imageData: NSData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(imageDataSampleBuffer) var image: UIImage = UIImage(data: imageData)! completion!(image:image, error:nil) } }) }) } /* AVCaptureVideoDataOutput Delegate ------------------------------------------*/ func captureOutput(captureOutput: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer: CMSampleBuffer!, fromConnection connection: AVCaptureConnection!) { self.sessionDelegate?.cameraSessionDidOutputSampleBuffer?(sampleBuffer) } } 

controller de vista de camera

 // // CameraViewController.swift // iOSSwiftSimpleAVCamera // // Created by Bradley Griffith on 7/1/14. // Copyright (c) 2014 Bradley Griffith. All rights reserved. // import UIKit import CoreMedia import AVFoundation class CameraViewController: UIViewController, CameraSessionControllerDelegate { var cameraSessionController: CameraSessionController! var previewLayer: AVCaptureVideoPreviewLayer! /* Lifecycle ------------------------------------------*/ override func viewDidLoad() { super.viewDidLoad() self.cameraSessionController = CameraSessionController() self.cameraSessionController.sessionDelegate = self self.setupPreviewLayer() } override func viewWillAppear(animated: Bool) { super.viewWillAppear(animated) self.cameraSessionController.startCamera() } override func viewWillDisappear(animated: Bool) { super.viewWillDisappear(animated) self.cameraSessionController.teardownCamera() } /* Instance Methods ------------------------------------------*/ func setupPreviewLayer() { var minSize = min(self.view.bounds.size.width, self.view.bounds.size.height) var bounds: CGRect = CGRectMake(0.0, 0.0, minSize, minSize) self.previewLayer = AVCaptureVideoPreviewLayer(session: self.cameraSessionController.session) self.previewLayer.bounds = bounds self.previewLayer.position = CGPointMake(CGRectGetMidX(self.view.bounds), CGRectGetMidY(self.view.bounds)) self.previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill self.view.layer.addSublayer(self.previewLayer) } func cameraSessionDidOutputSampleBuffer(sampleBuffer: CMSampleBuffer!) { // Any frame processing could be done here. } } 

Si desea capturar el video de la pantalla y savelo, también hay una opción para hacer una serie de capturas de pantalla, y más tarde para convertir una variedad de imágenes en el video, aunque no es muy eficiente desde el punto de vista del performance, es probable que no tenga 30-60 fps, pero si está bien con 5-20 fps, es posible que desee echar un vistazo a este ejemplo para swift3 .