我创建了一个AVCaptureSession并附加了前置摄像头
do {
try captureSession.addInput(AVCaptureDeviceInput(device: captureDevice))
}catch{print("err")}
现在我想开始并停止在touche事件上录制。我该怎么做？
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
print("touch")
//Start Recording
}
override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
print("release");
//End Recording and Save
}
答案 0 :(得分：6)
您没有提及是否使用AVCaptureVideoDataOutput或CMSampleBuffer作为会话的输出。前者非常适合快速录制视频而无需进一步编码，后者通过在录制会话期间获取AVCaptureMovieFileOutput的块来用于更高级的录制。
对于这个答案的范围，我将使用import UIKit
import AVFoundation
import AssetsLibrary
class ViewController: UIViewController, AVCaptureFileOutputRecordingDelegate {
var captureSession = AVCaptureSession()
lazy var frontCameraDevice: AVCaptureDevice? = {
let devices = AVCaptureDevice.devicesWithMediaType(AVMediaTypeVideo) as! [AVCaptureDevice]
return devices.filter{$0.position == .Front}.first
}()
lazy var micDevice: AVCaptureDevice? = {
return AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeAudio)
}()
var movieOutput = AVCaptureMovieFileOutput()
private var tempFilePath: NSURL = {
let tempPath = NSURL(fileURLWithPath: NSTemporaryDirectory()).URLByAppendingPathComponent("tempMovie").URLByAppendingPathExtension("mp4").absoluteString
if NSFileManager.defaultManager().fileExistsAtPath(tempPath) {
do {
try NSFileManager.defaultManager().removeItemAtPath(tempPath)
} catch { }
}
return NSURL(string: tempPath)!
}()
private var library = ALAssetsLibrary()
override func viewDidLoad() {
super.viewDidLoad()
//start session configuration
captureSession.beginConfiguration()
captureSession.sessionPreset = AVCaptureSessionPresetHigh
// add device inputs (front camera and mic)
captureSession.addInput(deviceInputFromDevice(frontCameraDevice))
captureSession.addInput(deviceInputFromDevice(micDevice))
// add output movieFileOutput
movieOutput.movieFragmentInterval = kCMTimeInvalid
captureSession.addOutput(movieOutput)
// start session
captureSession.commitConfiguration()
captureSession.startRunning()
}
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
print("touch")
// start capture
movieOutput.startRecordingToOutputFileURL(tempFilePath, recordingDelegate: self)
}
override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
print("release")
//stop capture
movieOutput.stopRecording()
}
private func deviceInputFromDevice(device: AVCaptureDevice?) -> AVCaptureDeviceInput? {
guard let validDevice = device else { return nil }
do {
return try AVCaptureDeviceInput(device: validDevice)
} catch let outError {
print("Device setup error occured \(outError)")
return nil
}
}
func captureOutput(captureOutput: AVCaptureFileOutput!, didStartRecordingToOutputFileAtURL fileURL: NSURL!, fromConnections connections: [AnyObject]!) {
}
func captureOutput(captureOutput: AVCaptureFileOutput!, didFinishRecordingToOutputFileAtURL outputFileURL: NSURL!, fromConnections connections: [AnyObject]!, error: NSError!) {
if (error != nil)
{
print("Unable to save video to the iPhone \(error.localizedDescription)")
}
else
{
// save video to photo album
library.writeVideoAtPathToSavedPhotosAlbum(outputFileURL, completionBlock: { (assetURL: NSURL?, error: NSError?) -> Void in
if (error != nil) {
print("Unable to save video to the iPhone \(error!.localizedDescription)")
}
})
}
}
}
，这是一些极简主义的起始代码：
2016-02-03 Ticket1 4.25
2016-02-04 Ticket2 .25
2016-02-04 Ticket2 1.00
2016-02-05 Ticket3 .75
有关Camera Capture的更多信息，请参阅WWDC 2014 - Session 508