iOSAVCaptureSession实现视频录制功能资源-CSDN文库

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iOS AVCaptureSession实现视频录制功能实现视频录制功能

本文实例为大家分享了AVCaptureSession实现视频录制功能的具体代码，供大家参考，具体内容如下

#import "RecordingVideoViewController.h"

#import <AVFoundation/AVFoundation.h>

#import <AssetsLibrary/AssetsLibrary.h>

@interface RecordingVideoViewController ()<AVCaptureFileOutputRecordingDelegate>

//会话负责输入和输出设备之间的数据传递

@property (strong,nonatomic) AVCaptureSession *captureSession;

//设备输入负责从AVCaptureDevice获得输入数据

@property (strong,nonatomic) AVCaptureDeviceInput *videoCaptureDeviceInput;

@property (strong,nonatomic) AVCaptureDeviceInput *audioCaptureDeviceInput;

//视频输出流

@property (strong,nonatomic) AVCaptureMovieFileOutput *captureMovieFileOutput;

//相机拍摄预览图层

@property (strong,nonatomic) AVCaptureVideoPreviewLayer *captureVideoPreviewLayer;

//自定义UI控件容器

@property (strong,nonatomic) UIView *viewContainer;

//聚焦图标

@property (strong,nonatomic) UIImageView *focusCursor;

//录制时长

@property (strong,nonatomic) UILabel *timeLabel;

//切换前后摄像头

@property (strong,nonatomic) UIButton *switchCameraBtn;

//改变焦距

@property (strong,nonatomic) UIButton *scaleBtn;

//计时器

@property (strong,nonatomic) NSTimer *timer;

@end

@implementation RecordingVideoViewController {

@private

NSInteger _num;

CGFloat _kCameraScale;

}

- (UIView *)viewContainer {

if (!_viewContainer) {

_viewContainer = [[UIView alloc] initWithFrame:[UIScreen mainScreen].bounds];

UIButton *takeButton = [UIButton buttonWithType:UIButtonTypeCustom];

takeButton.backgroundColor = [UIColor redColor];

[takeButton setTitle:@"start" forState:UIControlStateNormal];

[takeButton addTarget:self action:@selector(takeButtonClick:) forControlEvents:UIControlEventTouchUpInside];

_timeLabel = [[UILabel alloc] init];

_timeLabel.textColor = [UIColor redColor];

_timeLabel.textAlignment = NSTextAlignmentCenter;

_timeLabel.font = [UIFont boldSystemFontOfSize:20];

_timeLabel.text = @"00:00";

_switchCameraBtn = [UIButton buttonWithType:UIButtonTypeCustom];

[_switchCameraBtn setTitle:@"switch" forState:UIControlStateNormal];

_switchCameraBtn.backgroundColor = [UIColor redColor];

[_switchCameraBtn addTarget:self action:@selector(switchCameraBtnClick)

forControlEvents:UIControlEventTouchUpInside];

_scaleBtn = [UIButton buttonWithType:UIButtonTypeCustom];

[_scaleBtn setTitle:@"1X" forState:UIControlStateNormal];

_scaleBtn.backgroundColor = [UIColor redColor];

[_scaleBtn addTarget:self action:@selector(scaleBtnClick:) forControlEvents:UIControlEventTouchUpInside];

[_viewContainer addSubview:takeButton];

[_viewContainer addSubview:_timeLabel];

[_viewContainer addSubview:_scaleBtn];

[_viewContainer addSubview:_switchCameraBtn];

[takeButton mas_makeConstraints:^(MASConstraintMaker *make) {

make.size.mas_equalTo(CGSizeMake(60, 40));

make.centerX.mas_equalTo(_viewContainer);

make.bottom.mas_equalTo(_viewContainer).offset(-64);

}];

[_timeLabel mas_makeConstraints:^(MASConstraintMaker *make) {

make.centerX.mas_equalTo(_viewContainer);

make.height.mas_equalTo(@30);

make.top.mas_equalTo(_viewContainer);

}];

[_scaleBtn mas_makeConstraints:^(MASConstraintMaker *make) {

make.size.mas_equalTo(CGSizeMake(60, 40));

make.left.mas_equalTo(_viewContainer).offset(10);

make.top.mas_equalTo(_viewContainer);

}];

[_switchCameraBtn mas_makeConstraints:^(MASConstraintMaker *make) {

make.size.mas_equalTo(CGSizeMake(60, 40));

make.top.mas_equalTo(_viewContainer);

make.right.mas_equalTo(_viewContainer).offset(-10);

}];

_focusCursor = [[UIImageView alloc] init];

kBorder(_focusCursor, 1, [UIColor yellowColor]);

_focusCursor.alpha = 0;

[_viewContainer addSubview:self.focusCursor];

[_focusCursor mas_makeConstraints:^(MASConstraintMaker *make) {

make.size.mas_equalTo(CGSizeMake(40, 40));

make.center.mas_equalTo(_viewContainer);

}];

}

return _viewContainer;

}

- (void)viewDidLoad {

[super viewDidLoad];

self.title = @"视频录制";

_kCameraScale = 1.0f;

//初始化会话对象

_captureSession = [[AVCaptureSession alloc] init];

if ([_captureSession canSetSessionPreset:AVCaptureSessionPreset1280x720]) {

_captureSession.sessionPreset = AVCaptureSessionPreset1280x720;

}

NSError *error = nil;

//获取视频输入对象

AVCaptureDevice *videoCaptureDevice = [self cameraDeviceWithPosition:(AVCaptureDevicePositionBack)];

if (!videoCaptureDevice) {

NSLog(@"获取后置摄像头失败！");

return;

}

_videoCaptureDeviceInput = [[AVCaptureDeviceInput alloc] initWithDevice:videoCaptureDevice error:&error];

if (error) {

NSLog(@"取得视频设备输入对象时出错");

return;

}

//获取音频输入对象

AVCaptureDevice *audioCatureDevice = [[AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio] firstObject];

_audioCaptureDeviceInput = [[AVCaptureDeviceInput alloc] initWithDevice:audioCatureDevice error:&error];

if (error) {

NSLog(@"取得音频设备输入对象时出错");

return;

}

//初始化设备输出对象

_captureMovieFileOutput = [[AVCaptureMovieFileOutput alloc] init];

//将设备输入添加到会话中

if ([_captureSession canAddInput:_videoCaptureDeviceInput]) {

[_captureSession addInput:_videoCaptureDeviceInput];

[_captureSession addInput:_audioCaptureDeviceInput];

//防抖功能

AVCaptureConnection *captureConnection = [_captureMovieFileOutput connectionWithMediaType:AVMediaTypeAudio];

if ([captureConnection isVideoStabilizationSupported]) {

captureConnection.preferredVideoStabilizationMode = AVCaptureVideoStabilizationModeAuto;

}

//将设备输出添加到会话中

if ([_captureSession canAddOutput:_captureMovieFileOutput]) {

[_captureSession addOutput:_captureMovieFileOutput];

}

//创建视频预览图层

_captureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:_captureSession];

self.viewContainer.layer.masksToBounds = YES;

_captureVideoPreviewLayer.frame = self.viewContainer.bounds;

_captureVideoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;

[self.view.layer addSublayer:_captureVideoPreviewLayer];

//显示自定义控件

[self.view addSubview:self.viewContainer];

//添加点按聚焦手势

UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapScreen:)];

[self.viewContainer addGestureRecognizer:tapGesture];

}

-(void)viewDidAppear:(BOOL)animated{

[super viewDidAppear:animated];

[self.captureSession startRunning];

}

-(void)viewDidDisappear:(BOOL)animated{

[super viewDidDisappear:animated];

[self.captureSession stopRunning];

[self.timer invalidate];

self.timer = nil;

}

- (void)viewWillDisappear:(BOOL)animated {

[super viewWillDisappear:animated];

[self.captureVideoPreviewLayer setAffineTransform:CGAffineTransformMakeScale(1, 1)];

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

}

//开始 + 暂停录制

- (void)takeButtonClick:(UIButton *)sender {

if ([self.captureMovieFileOutput isRecording]) {

[self.captureMovieFileOutput stopRecording];

[self.navigationController popViewControllerAnimated:YES];

} else {

AVCaptureConnection *captureConnection = [self.captureMovieFileOutput connectionWithMediaType:AVMediaTypeVideo];

captureConnection.videoOrientation = [self.captureVideoPreviewLayer connection].videoOrientation;

NSString *filePath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"Movie.mov"];

NSLog(@"%@",filePath);

[self.captureMovieFileOutput startRecordingToOutputFileURL:[NSURL fileURLWithPath:filePath] recordingDelegate:self];

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