我想在我的应用中制作自定义视频录像机。 目前我可以录制视频并进行保存，但我希望在录制时为视频添加过滤器，并使用新过滤器将视频保存到相册。这是我录制视频并保存的代码。
let captureSession = AVCaptureSession()
let fileOutput = AVCaptureMovieFileOutput()
func initVideoRecording() {
do {
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryRecord)
try AVAudioSession.sharedInstance().setActive(true)
}catch {
print("error in audio")
}
let session = AVCaptureSession()
session.beginConfiguration()
session.sessionPreset = AVCaptureSessionPresetMedium
let videoLayer = AVCaptureVideoPreviewLayer(session: session)
videoLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
videoLayer.frame = myImage.bounds
myImage.layer.addSublayer(videoLayer)
let backCamera = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
let audio = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeAudio)
do
{
let input = try AVCaptureDeviceInput(device: backCamera)
let audioInput = try AVCaptureDeviceInput(device: audio)
session.addInput(input)
session.addInput(audioInput)
}
catch
{
print("can't access camera")
return
}
session.addOutput(fileOutput)
session.commitConfiguration()
session.startRunning()
}
@IBAction func recordFunc() {
if fileOutput.recording {
myButton.setTitle("record", forState: .Normal)
fileOutput.stopRecording()
}else{
let fileUrl = NSURL(fileURLWithPath: NSTemporaryDirectory()).URLByAppendingPathComponent("\(getCurrentDate())-capturedvideo.mp4")
fileOutput.startRecordingToOutputFileURL(fileUrl, recordingDelegate: self)
myButton.setTitle("stop", forState: .Normal)
}
}
func captureOutput(captureOutput: AVCaptureFileOutput!, didFinishRecordingToOutputFileAtURL outputFileURL: NSURL!, fromConnections connections: [AnyObject]!, error: NSError!) {
//to save record video to photos album
UISaveVideoAtPathToSavedPhotosAlbum(outputFileURL.path!, self, "video:didFinishSavingWithError:contextInfo:", nil)
}
我尝试使用AVCaptureVideoDataOutput
在其委托中我使用此代码
func captureOutput(captureOutput: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer: CMSampleBuffer!, fromConnection connection: AVCaptureConnection!) {
connection.videoOrientation = AVCaptureVideoOrientation.Portrait
let pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer)
let cameraImage = CIImage(CVPixelBuffer: pixelBuffer!)
let comicEffect = CIFilter(name: "CIComicEffect")
comicEffect!.setValue(cameraImage, forKey: kCIInputImageKey)
let filteredImage = UIImage(CIImage: comicEffect!.valueForKey(kCIOutputImageKey) as! CIImage!)
dispatch_async(dispatch_get_main_queue())
{
self.myImage.image = filteredImage
}
}
使用此代码，它只显示过滤器，但不记录。
======================= /这是我的问题的解决方案\ ============ ==== 请注意，此代码不使用swift 2和Xcode 7.3
let captureSession = AVCaptureSession()
let videoOutput = AVCaptureVideoDataOutput()
let audioOutput = AVCaptureAudioDataOutput()
var adapter:AVAssetWriterInputPixelBufferAdaptor!
var record = false
var videoWriter:AVAssetWriter!
var writerInput:AVAssetWriterInput!
var audioWriterInput:AVAssetWriterInput!
var lastPath = ""
var starTime = kCMTimeZero
var outputSize = CGSizeMake(UIScreen.mainScreen().bounds.width, UIScreen.mainScreen().bounds.height)
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
video()
}
func video() {
do {
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryRecord)
try AVAudioSession.sharedInstance().setActive(true)
}catch {
print("error in audio")
}
captureSession.beginConfiguration()
captureSession.sessionPreset = AVCaptureSessionPresetMedium
let videoLayer = AVCaptureVideoPreviewLayer(session: captureSession)
videoLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
//videoLayer.frame = myImage.bounds
//myImage.layer.addSublayer(videoLayer)
view.layer.addSublayer(videoLayer)
let backCamera = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
let audio = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeAudio)
do
{
let input = try AVCaptureDeviceInput(device: backCamera)
let audioInput = try AVCaptureDeviceInput(device: audio)
captureSession.addInput(input)
captureSession.addInput(audioInput)
}
catch
{
print("can't access camera")
return
}
let queue = dispatch_queue_create("sample buffer delegate", DISPATCH_QUEUE_SERIAL)
videoOutput.setSampleBufferDelegate(self,queue: queue)
audioOutput.setSampleBufferDelegate(self, queue: queue)
captureSession.addOutput(videoOutput)
captureSession.addOutput(audioOutput)
captureSession.commitConfiguration()
captureSession.startRunning()
}
@IBAction func recordFunc() {
if record {
myButton.setTitle("record", forState: .Normal)
record = false
self.writerInput.markAsFinished()
audioWriterInput.markAsFinished()
self.videoWriter.finishWritingWithCompletionHandler { () -> Void in
print("FINISHED!!!!!")
UISaveVideoAtPathToSavedPhotosAlbum(self.lastPath, self, "video:didFinishSavingWithError:contextInfo:", nil)
}
}else{
let fileUrl = NSURL(fileURLWithPath: NSTemporaryDirectory()).URLByAppendingPathComponent("\(getCurrentDate())-capturedvideo.MP4")
lastPath = fileUrl.path!
videoWriter = try? AVAssetWriter(URL: fileUrl, fileType: AVFileTypeMPEG4)
let outputSettings = [AVVideoCodecKey : AVVideoCodecH264, AVVideoWidthKey : NSNumber(float: Float(outputSize.width)), AVVideoHeightKey : NSNumber(float: Float(outputSize.height))]
writerInput = AVAssetWriterInput(mediaType: AVMediaTypeVideo, outputSettings: outputSettings)
writerInput.expectsMediaDataInRealTime = true
audioWriterInput = AVAssetWriterInput(mediaType: AVMediaTypeAudio, outputSettings: DejalActivityView.getAudioDictionary() as? [String:AnyObject])
videoWriter.addInput(writerInput)
videoWriter.addInput(audioWriterInput)
adapter = AVAssetWriterInputPixelBufferAdaptor(assetWriterInput: writerInput, sourcePixelBufferAttributes: DejalActivityView.getAdapterDictionary() as? [String:AnyObject])
videoWriter.startWriting()
videoWriter.startSessionAtSourceTime(starTime)
record = true
myButton.setTitle("stop", forState: .Normal)
}
}
func getCurrentDate()->String{
let format = NSDateFormatter()
format.dateFormat = "dd-MM-yyyy hh:mm:ss"
format.locale = NSLocale(localeIdentifier: "en")
let date = format.stringFromDate(NSDate())
return date
}
extension newCustomCameraViewController:AVCaptureVideoDataOutputSampleBufferDelegate,AVCaptureAudioDataOutputSampleBufferDelegate{
func captureOutput(captureOutput: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer: CMSampleBuffer!, fromConnection connection: AVCaptureConnection!) {
starTime = CMSampleBufferGetPresentationTimeStamp(sampleBuffer)
if captureOutput == videoOutput {
connection.videoOrientation = AVCaptureVideoOrientation.Portrait
let pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer)
let cameraImage = CIImage(CVPixelBuffer: pixelBuffer!)
let comicEffect = CIFilter(name: "CIHexagonalPixellate")
comicEffect!.setValue(cameraImage, forKey: kCIInputImageKey)
let filteredImage = UIImage(CIImage: comicEffect!.valueForKey(kCIOutputImageKey) as! CIImage!)
//let filteredImage = UIImage(CIImage: cameraImage)
if self.record == true{
dispatch_sync(dispatch_queue_create("sample buffer append", DISPATCH_QUEUE_SERIAL), {
if self.record == true{
if self.writerInput.readyForMoreMediaData {
let bo = self.adapter.appendPixelBuffer(DejalActivityView.pixelBufferFromCGImage(self.convertCIImageToCGImage(comicEffect!.valueForKey(kCIOutputImageKey) as! CIImage!)).takeRetainedValue() as CVPixelBufferRef, withPresentationTime: self.starTime)
print("video is \(bo)")
}
}
})
}
dispatch_async(dispatch_get_main_queue())
{
self.myImage.image = filteredImage
}
}else if captureOutput == audioOutput{
if self.record == true{
let bo = audioWriterInput.appendSampleBuffer(sampleBuffer)
print("audio is \(bo)")
}
}
}
func convertCIImageToCGImage(inputImage: CIImage) -> CGImage! {
let context:CIContext? = CIContext(options: nil)
if context != nil {
return context!.createCGImage(inputImage, fromRect: inputImage.extent)
}
return nil
}
func video(videoPath: NSString, didFinishSavingWithError error: NSError?, contextInfo info: AnyObject) {
var title = "Success"
var message = "Video was saved"
if let saveError = error {
title = "Error"
message = "Video failed to save"
}
let alert = UIAlertController(title: title, message: message, preferredStyle: .Alert)
alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Cancel, handler: nil))
presentViewController(alert, animated: true, completion: nil)
}
这些方法在DejalActivityView中存在于目标c和我无法将其转换为Swift所以如果任何人可以转换它请编辑我的代码并将其转换
+ (CVPixelBufferRef )pixelBufferFromCGImage:(CGImageRef)image size:(CGSize)size
{
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:YES], kCVPixelBufferCGImageCompatibilityKey,
[NSNumber numberWithBool:YES], kCVPixelBufferCGBitmapContextCompatibilityKey, nil];
CVPixelBufferRef pxbuffer = NULL;
CVReturn status = CVPixelBufferCreate(kCFAllocatorDefault, size.width, size.height, kCVPixelFormatType_32ARGB, (__bridge CFDictionaryRef) options, &pxbuffer);
// CVReturn status = CVPixelBufferPoolCreatePixelBuffer(NULL, adaptor.pixelBufferPool, &pxbuffer);
NSParameterAssert(status == kCVReturnSuccess && pxbuffer != NULL);
CVPixelBufferLockBaseAddress(pxbuffer, 0);
void *pxdata = CVPixelBufferGetBaseAddress(pxbuffer);
NSParameterAssert(pxdata != NULL);
CGColorSpaceRef rgbColorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = CGBitmapContextCreate(pxdata, size.width, size.height, 8, 4*size.width, rgbColorSpace, kCGImageAlphaPremultipliedFirst);
NSParameterAssert(context);
CGContextDrawImage(context, CGRectMake(0, 0, CGImageGetWidth(image), CGImageGetHeight(image)), image);
CGColorSpaceRelease(rgbColorSpace);
CGContextRelease(context);
CVPixelBufferUnlockBaseAddress(pxbuffer, 0);
return pxbuffer;
}
+(NSDictionary *)getAdapterDictionary{
NSDictionary *sourcePixelBufferAttributesDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:kCVPixelFormatType_32ARGB], kCVPixelBufferPixelFormatTypeKey, nil];
return sourcePixelBufferAttributesDictionary;
}
+(NSDictionary *) getAudioDictionary{
AudioChannelLayout acl;
bzero( &acl, sizeof(acl));
acl.mChannelLayoutTag = kAudioChannelLayoutTag_Mono;
NSDictionary* audioOutputSettings = nil;
audioOutputSettings = [ NSDictionary dictionaryWithObjectsAndKeys:
[ NSNumber numberWithInt: kAudioFormatMPEG4AAC ], AVFormatIDKey,
//[ NSNumber numberWithInt: 16 ], AVEncoderBitDepthHintKey,
[ NSNumber numberWithFloat: 44100.0 ], AVSampleRateKey,
[ NSNumber numberWithInt: 1 ], AVNumberOfChannelsKey,
[ NSData dataWithBytes: &acl length: sizeof( acl ) ], AVChannelLayoutKey,
nil ];
// NSDictionary* audioOutputSettings = nil;
// audioOutputSettings = [ NSDictionary dictionaryWithObjectsAndKeys:
// [ NSNumber numberWithInt: kAudioFormatMPEG4AAC_HE_V2 ], AVFormatIDKey,
// [ NSNumber numberWithFloat: 44100.0], AVSampleRateKey,
// [ NSData dataWithBytes: &acl length: sizeof( acl ) ], AVChannelLayoutKey,
// nil ];
return audioOutputSettings;
}
答案 0 :(得分：3)
您需要添加AVAssetWriter
var videoRecorder: AVAssetWriter?
然后在你的委托回调中：
let timeStamp = CMSampleBufferGetPresentationTimeStamp(sampleBuffer)
if videoRecorder?.status == .Unknown {
startRecordingTime = timeStamp
videoRecorder?.startWriting()
videoRecorder?.startSessionAtSourceTime(timeStamp)
}
您需要为每个要录制的录制配置录制器，还需要将录制内容添加到录制器中。
您可能会开始遇到问题，因为您似乎没有任何队列设置，但您需要参考此Github是一个非常好的资源。
https://github.com/waleedka/rosywriterswift
编辑：其他信息
你需要init（）编写器然后为视频/音频添加输入AVAssetWriterInput。